Files     2158     36#
acura — 2
alfa romeo — 7
amc — 19
audi — 0 — 2#
bmw - mini — 17 — 2#
buick — 37
cadillac — 5
chevy — 473 — 1#
        — lsx — 130
        — ltx — 61 — 1#
        — 4.3l v6 — 9
        — ecotec — 4
chevy_big_block — 254 — 3#
        — 409 — 7
chrysler — 7
        — jeep — 7
        — neon — 7
        — viper - v10 — 14
        — la — 102 — 1#
        — hemi — 24
chrysler_big_block
        — rb — 84
        — early hemi — 5
        — hemi — 35
citroen — 0 — 2#
ferrari — 2
ford — 24 — 2#
        — v6 3.8 — 7
        — cleveland — 32
        — modular — 40
        — windsor — 221
ford_big_block
        — fe — 34 — 2#
        — 385 series — 94 — 3#
holden — 8
honda — 34
hyundai — 3
jaguar — 1
lotus — 0 — 1#
mazda — 12
mercedes — 5
mgb — 4
mitsubishi — 15 — 2#
nissan — 19
olds — 30
opel / vaux — 20 — 2#
pontiac — 72 — 1#
        — 3800 v6 — 10
porsche — 9
renault — 2
rover — 0 — 2#
studebaker — 8
subaru — 9 — 2#
toyota — 34
volvo — 14 — 2#
vw — 22 — 7#
          ———————
buell — 1
harley-davidson — 48
honda — 1
jawa — 1
kawasaki — 4
suzuki — 7
triumph — 1

# - DFW Only Numbers
214 2v/3v Intake Files
 
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DFW or FLW Files

A Package of more than 2150 flow files for use with Dyno simulation programs.
I have formatted each cylinder heads information into individual files for use with different versions of DeskTop Dyno, Comp Cams CamQuest program and Dynomation Versions 4 and 5. The files will be in separate folders for the different engine types. See tree view to left. Download a Sample DFW File for Dynamation 5.0 (.5KB) or a Sample DFW File for Camquest 6.0 (.5KB) or a Sample FLW File (.5KB) or a N E W Sample DFW File for Performance Trends Engine Analyzer v3.9 (.5KB) Engine Analyzer Pro User's Manual Supplement v3.9 (new v3.9 features only) to see which of these files will work with your simulation software.
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Cylinder Head Flow Data at 28 Inches of Water

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[Acura] [Alfa Romeo] [AMC] [Audi] [BMW] [Buick] [Cadillac] [Chevy] [BB Chevy] [Chrysler] [BB Chrysler] [Citroen] [Cummins] [Ferrari] [Fiat] [Ford] [BB Ford] [Holden] [Honda] [Hyundai] [Jaguar] [Lotus] [Mazda] [Mercedes] [MGB] [Mitsubishi] [Nissan] [Olds] [Opel / Vauxhall] [Pontiac] [Porsche] [Renault] [Rover] [Saab] [Studebaker] [Subaru] [Toyota] [Volvo] [VW] ——— [Buell] [Harley-Davidson] [Honda] [Jawa] [Kawasaki] [KTM] [Suzuki] [Triumph] ——— [IH]
Peak Horse Power
 
 
These numbers have come from various magazines, web sites, manufactures catalogs, and ???
We have tried to verify the accuracy of these numbers but use at your own risk!
ALL Volume numbers are in CCs. — ALL Flow numbers are in CFM.
 
Where do MOST of the numbers come from?


Cylinder Head Flow Data Table

Acura     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 .600 Average
1.8l Type R CCHN/AStockN/A-------262/207
79%
-
269 hp
292
329		----
1.8l Type R Ported CCHN/AStockN/A-------299/242
80.9%
-
308 hp
334
375		----
GSR Alaniz Cyl HeadsN/A33mm/ 28mmN/A77/-123/-154/-
116
344
1.29
158 hp		174/-
131
389
1.16
179 hp
194		194/-
146
434
1.08
200 hp
216		215/-
162
481
1.03
221 hp
240
270		232/-
175
519
.973
239 hp
259
291		245/-
185
548
.914
252 hp
273
307		256/-
193
572
.859
263 hp
286
321		--199
-
-
.263/.223
GSR Ported Alaniz Cyl HeadsN/A-N/A75/-117/-151/-
-
155 hp		179/-
-
184 hp
200		209/-
-
215 hp
233		236/-
-
243 hp
263
296		256/-
-
263 hp
286
321		271/-
-
279 hp
302
340		279/-
-
287 hp
311
350		--212
GSR Ported WAT PorflowN/A33mm/ 28mm
81mm		N/A84/70
83.3%		119/111
93.3%		150/150
100%
113/157
335/466
1.25/1.48
154 hp		183/176
96.2%
138/184
409/546
1.22/1.39
188 hp
204		213/188
88.3%
161/197
476/584
1.19/1.23
219 hp
238		237/195
82.3%
179/204
530/605
1.13/1.1
244 hp
264
297		255/197
77.3%
192/206
570/612
1.07/.974
262 hp
285
320		267/198
74.2%
201/207
597/615
.996/.87
275 hp
298
335		280/203
72.5%
211/213
626/630
.94/.803
288 hp
312
351		--213/177
83.2%
-
.263/.223
1.8l GSR CCHN/A33mm/ 28mmN/A-------250/189
75.6%
189/198
559/587
.932/.831
257 hp
279
314		----
-
-
.263/.223
1.8l GSR Ported CCHN/A33mm/ 28mmN/A-------290/234
80.7%
219/245
648/726
1.08/1.02
298 hp
324
364		----
-
-
.263/.223
RSX-S Alaniz Cyl HeadsN/A35mm/ 30mmN/A83/-130/-173/-
116
344
1.36
178 hp		208/-
139
413
1.31
214 hp
232		234/-
157
465
1.23
241 hp
261		254/-
170
505
1.14
261 hp
283
319		269/-
180
534
1.06
277 hp
300
338		280/-
188
556
.984
288 hp
312
351		285/-
191
566
.902
293 hp
318
358		--229
-
-
.279/.239
RSX Ported CHR Motorsports LLC Home Made BenchN/A35mm/ 30mm
-
Radius on Exhaust		N/A95/113
118%		131/148
113%		162/175
108%
109/160
322/473
1.28/1.61
167 hp		192/200
104%
129/183
381/541
1.21/1.47
197 hp
214		213/213
100%
143/194
423/576
1.12/1.31
219 hp
238		234/226
96.6%
157/206
465/611
1.05/1.19
241 hp
261
294		251/232
92.4%
168/212
499/627
.993/1.07
258 hp
280
315		264/237
89.8%
177/216
525/641
.928/.972
272 hp
295
331		277/241
87%
186/220
550/652
.877/.89
285 hp
309
348		286/244
85.3%
192/223
568/660
.823/.819
294 hp
319
359		293/245
83.6%
196/224
582/663
.773/.754
301 hp
327
368		230/216
93.8%
-
.279/.239


Alfa Romeo     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume 1mm 2mm 3mm 4mm 6mm 8mm 10mm 11mm 12mm 13mm Average
2.0l Jim KN/A44mm/40mmN/A18/18
100%		42/42
100%		64/62
96.9%
27.2/31.8
80.5/94.3
.682/.727
65.87 hp		78/75
96.2%
33.1/38.5
98.1/114
.623/.659
80.27 hp
87.09		110/89
80.9%
46.7/45.7
138/135
.586/.522
113.1 hp
122.8		133/99
74.4%
56.4/50.8
167/151
.531/.435
136.8 hp
148.4
167		144/105
72.9%
61.1/53.9
181/160
.46/.369
148.1 hp
161
181		147/107
72.8%
62.4/54.9
185/163
.427/.342
151 hp
164
184		149/109
73.2%
63.2/56
187/166
.397/.319
153 hp
166
187		151/110
72.8%
64.1/56.5
190/167
.371/.298
155 hp
169
189		113/88.7
78.4%
-
.351/.319
2.0l Jim K Exhaust PortedN/A44mm/40mmN/A18/20
111%		42/42
100%		64/64
100%
27.2/32.9
80.5/97.4
.682/.75
65.87 hp		78/75
96.2%
33.1/38.5
98.1/114
.623/.659
80.27 hp
87.09		110/92
83.6%
46.7/47.2
138/140
.586/.539
113.1 hp
122.8		133/107
80.5%
56.4/54.9
167/163
.531/.47
136.8 hp
148.4
167		144/117
81.3%
61.1/60.1
181/178
.46/.411
148.1 hp
161
181		147/120
81.6%
62.4/61.6
185/183
.427/.384
151 hp
164
184		149/124
83.2%
63.2/63.7
187/189
.397/.363
153 hp
166
187		151/125
82.8%
64.1/64.2
190/190
.371/.338
155 hp
169
189		113/96.2
85.1%
-
.351/.319
2.0l Jim K 1mmOS ValvesN/A45mm/41mmN/A18/18
100%		42/42
100%		64/62
96.9%
26/30.3
76.9/89.8
.667/.709
65.87 hp		84/84
100%
34.1/41
101/122
.656/.72
86.44 hp
93.79		122/110
90.2%
49.5/53.8
147/159
.636/.629
125.5 hp
136.1		149/119
79.9%
60.4/58.2
179/172
.582/.51
153 hp
166
187		164/122
74.4%
66.5/59.6
197/177
.513/.419
169 hp
183
206		171/124
72.5%
69.4/60.6
206/180
.486/.387
176 hp
191
215		172/124
72.1%
69.8/60.6
207/180
.448/.355
177 hp
192
216		174/124
71.3%
70.6/60.6
209/180
.418/.327
179 hp
194
218		127/101
79.8%
-
.359/.327
2.0l Ported Stage 2 Jim KN/A46mm/38mmN/A20/17
85%		44/35
79.5%		64/52
81.3%
24.8/29.6
73.6/87.6
.652/.642
65.87 hp		84/67
79.8%
32.6/38.1
96.6/113
.642/.62
86.44 hp
93.79		124/97
78.2%
48.1/55.2
143/163
.632/.598
127.5 hp
138.4		154/110
71.4%
59.8/62.6
177/185
.589/.509
158 hp
172
193		177/119
67.2%
68.7/67.7
204/201
.541/.44
182 hp
198
222		184/122
66.3%
71.4/69.4
212/206
.511/.411
189 hp
205
231		189/124
65.6%
73.4/70.5
217/209
.482/.382
194 hp
211
237		192/125
65.1%
74.5/71.1
221/211
.452/.356
197 hp
214
241		135/94.6
70.2%
-
.367/.303
2.0l Ported Stage 3 Jim KN/A46mm/38mmN/A20/17
85%		45/35
77.8%		67/52
77.6%
26/29.6
77.1/87.6
.683/.642
68.96 hp		89/67
75.3%
34.6/38.1
102/113
.68/.62
91.59 hp
99.37		136/97
71.3%
52.8/55.2
156/163
.693/.598
139.9 hp
152		172/110
64%
66.8/62.6
198/185
.657/.509
177 hp
192
216		192/119
62%
74.5/67.7
221/201
.587/.44
197 hp
214
241		197/122
61.9%
76.5/69.4
227/206
.548/.411
203 hp
220
247		201/124
61.7%
78/70.5
231/209
.512/.382
207 hp
224
252		201/125
62.2%
78/71.1
231/211
.473/.356
207 hp
224
252		144/94.6
65.5%
-
.367/.303
 
 
Alfa 2     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 Average
'72 2.0lN/A44mm/40mmN/A48/42
87.5%		-93/78
83.9%
39.5/40
117/119
.585/.54
95.70 hp		-131/97
74%
55.6/49.8
165/148
.55/.448
134.7 hp
146.2		-150/100
66.7%
63.6/51.3
189/152
.472/.346
154 hp
167
188		153/99
64.7%
64.9/50.8
192/151
.428/.305
157 hp
171
192		158/97
61.4%
67/49.8
199/148
.398/.269
163 hp
176
198		-122/85.5
70%
-
.351/.319
'72 2.0l +1mm ValvesN/A45mm/41mmN/A53/49
92.5%		-110/79
71.8%
44.6/38.6
132/114
.677/.534
113.1 hp		-143/98
68.5%
58/47.9
172/142
.587/.441
147.1 hp
160		-165/104
63%
66.9/50.8
198/151
.508/.351
170 hp
184
207		171/104
60.8%
69.4/50.8
206/151
.468/.312
176 hp
191
215		176/104
59.1%
71.4/50.8
212/151
.433/.281
181 hp
196
221		-136/89.7
65.8%
-
.359/.327


AMC     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 Average
AMC 090 '73 Ken Parkman SF110 IronN/A2.025/1.6255874/56
75.7%		156/112
71.8%		201/141
70.1%
62.4/68
185/201
.721/.631
413 hp		219/149
68%
68/71.8
201/213
.589/.50
451 hp
489		226/149
65.9%
70.2/71.8
208/213
.487/.40
465 hp
504		232/150
64.7%
72/72.3
213/214
.416/.335
477 hp
518
582		238/151
63.4%
73.9/72.8
219/216
.366/.289
490 hp
531
597		-212/142
67%
-
.410/.329
AMC 291 Iron173/732.025/1.625N/A----225/155
68.9%
69.9/74.7
207/221
.484/.416
463 hp
502		----
-
1.30/2.12
.410/.329
AMC 291 '70 Ken Parkman SF110 IronN/A2.025/1.625
-
No Pipe		5171/55
77.5%		127/107
84.3%		179/135
75.4%
55.6/65.1
165/193
.642/.604
368 hp		209/142
67.9%
64.9/68.5
192/203
.563/.476
430 hp
466		217/145
66.8%
67.4/69.9
200/207
.467/.389
446 hp
484		222/145
65.3%
68.9/69.9
204/207
.398/.324
457 hp
495
557		228/145
63.6%
70.8/69.9
210/207
.351/.278
469 hp
509
572		-197/137
69.3%
-
.410/.329
AMC 291 Bowl Intake Ported Exhaust IronN/A2.055/1.65
-
Pipe		N/A67/50
74.6%		138/108
78.3%		193/153
79.3%
58.2/71.6
172/212
.683/.674
397 hp		236/178
75.4%
71.2/83.2
211/247
.626/.588
485 hp
527		257/220
85.6%
77.5/103
230/305
.545/.581
529 hp
574		257/227
88.3%
77.5/106
230/315
.454/.50
529 hp
574
645		257/230
89.5%
77.5/108
230/319
.39/.434
529 hp
574
645		-223/186
83.4%
-
.416/.334
AMC 291-C '70 390 '71 401 74Bubblefender IronN/A2.025/1.62551-138/101
73.2%		185/137
74.1%
57.4/66.1
170/196
.664/.613
381 hp		212/152
71.7%
65.8/73.3
195/217
.571/.51
436 hp
473		214/154
72%
66.4/74.3
197/220
.461/.413
440 hp
478		219/-
68
201
.393
451 hp
489
550		--194/136
-
-
.410/.329
AMC 475 '78-'85 74Bubblefender IronN/A2.025/1.62564-142/107
75.4%		186/137
73.7%
57.8/66.1
171/196
.668/.613
383 hp		204/143
70.1%
63.3/69
188/204
.549/.48
420 hp
455		209/144
68.9%
64.9/69.4
192/206
.45/.386
430 hp
466		214/-
66.4
197
.384
440 hp
478
537		--191/133
-
-
.410/.329
AMC 502 '74-'77 74Bubblefender IronN/A2.025/1.62559.2-144/114
79.2%		188/132
70.2%
58.4/63.6
173/189
.675/.59
387 hp		204/140
68.6%
63.3/67.5
188/200
.549/.47
420 hp
455		212/144
67.9%
65.8/69.4
195/206
.456/.386
436 hp
473		216/-
67.1
199
.388
444 hp
482
542		--193/133
-
-
.410/.329
AMC 502 '74 Ken Parkman SF110 IronN/A2.025/1.6256070/59
84.3%		143/113
79%		192/146
76%
59.6/70.4
177/209
.689/.653
395 hp		213/150
70.4%
66.1/72.3
196/214
.573/.503
438 hp
475		220/152
69.1%
68.3/73.3
202/217
.474/.408
453 hp
491		228/153
67.1%
70.8/73.8
210/219
.409/.342
469 hp
509
572		236/153
64.8%
73.3/73.8
217/219
.363/.293
485 hp
527
592		-205/145
70.4%
-
.410/.329
AMC SS IronN/A2.08/1.66N/A-----264/-
77.7
230
.461
543 hp
589
663		---
-
-
.421/.336
AMC SS 558 Ken Parkman IronN/A2.08/1.66
-
No Pipe		N/A70/57
81.4%		154/100
64.9%		206/129
62.6%
60.6/59.6
180/177
.72/.565
424 hp		242/146
60.3%
71.2/67.5
211/200
.634/.479
498 hp
540		239/152
63.6%
70.3/70.2
208/208
.501/.399
492 hp
533		246/159
64.6%
72.4/73.5
215/218
.43/.348
506 hp
549
617		248/167
67.3%
73/77.2
216/229
.371/.313
510 hp
554
622		-223/142
63.9%
-
.421/.336
AMC SS 558 Ken Parkman IronN/A2.08/1.66
-
Pipe		N/A70/58
82.9%		154/107
69.5%		206/142
68.9%
60.6/65.6
180/194
.72/.622
424 hp		242/161
66.5%
71.2/74.4
211/220
.634/.529
498 hp
540		239/172
72%
70.3/79.5
208/235
.501/.452
492 hp
533		246/181
73.6%
72.4/83.6
215/248
.43/.396
506 hp
549
617		248/190
76.6%
73/87.8
216/260
.371/.356
510 hp
554
622		-223/159
71.4%
-
.421/.336
AMC Iron Ported PaytonN/A2.08/1.62564------270/200
74.1%
79.5/96.4
235/286
.404/.383
555 hp
603
678		--
-
-
.421/.329
Edelbrock Performer 60119, 60139 SF1020 Alum185/702.02/1.605465/52
80%		130/96
73.8%		192/127
66.1%
59.9/63.2
178/187
.691/.577
395 hp		235/163
69.4%
73.3/81.1
217/240
.634/.555
483 hp
525		258/182
70.5%
80.5/90.5
239/268
.557/.496
531 hp
576		260/190
73.1%
81.1/94.5
240/280
.468/.431
535 hp
580
653		--215/152
70.5%
1.41/2.71
.409/.324
Edelbrock Performer RPM 60109 Alum185/702.02/1.60
4.15		53----252/162
64.3%
78.6/80.6
233/239
.544/.441
518 hp
562		----
-
1.36/2.31
.409/.324
Edelbrock Ported 74Bubblefender AlumN/A2.02/1.6054-134/106
79.1%		182/145
79.7%
56.8/72.1
168/214
.655/.659
374 hp		244/176
72.1%
76.1/87.5
226/259
.658/.60
502 hp
545		270/200
74.1%
84.3/99.5
250/295
.583/.545
555 hp
603		274/212
77.4%
85.5/105
253/312
.493/.481
564 hp
612
688		--221/168
76%
-
.409/.324
Edelbrock Ported 74Bubblefender AlumN/A2.08/1.6054-143/113
79%		202/149
73.8%
59.4/74.1
176/220
.706/.677
416 hp		254/181
71.3%
74.8/90
221/267
.666/.617
523 hp
567		278/201
72.3%
81.8/100
242/296
.583/.548
572 hp
620		286/214
74.8%
84.2/106
249/315
.50/.486
588 hp
638
718		296/-
87.1
258
.443
609 hp
661
743		-243/172
-
-
.421/.324
Edelbrock Performer 401 Ported Meaux Racing Heads SF600 AlumN/A2.02/1.60
4.00
No Pipe		N/A-130/97
74.6%		192/135
70.3%
59.9/67.1
178/199
.691/.613
395 hp		241/179
74.3%
75.2/89
223/264
.65/.61
496 hp
538		268/203
75.7%
83.6/101
248/299
.579/.553
551 hp
598		282/213
75.5%
88/106
261/314
.507/.484
580 hp
629
708		--223/165
74.3%
-
.409/.324
Indy 401-SR Alum235/1052.10/1.6561-136/123
90.4%		195/159
81.5%
56.3/74.4
167/220
.675/.70
401 hp		233/178
76.4%
67.3/83.2
199/247
.605/.588
479 hp
520		259/186
71.8%
74.8/87
222/258
.538/.492
533 hp
578		272/191
70.2%
78.5/89.3
233/265
.471/.421
560 hp
607
683		272/192
70.6%
78.5/89.8
233/266
.403/.362
560 hp
607
683		-228/172
75.3%
1.16/1.83
.425/.334
Indy 401-SR Full Porting AlumN/A2.10/1.65N/A-141/123
87.2%		204/155
76%
58.9/72.5
175/215
.706/.683
420 hp		253/181
71.5%
73/84.6
216/251
.657/.598
520 hp
565		287/207
72.1%
82.9/96.8
246/287
.596/.547
590 hp
641		311/225
72.3%
89.8/105
266/312
.538/.496
640 hp
694
781		322/237
73.6%
93/111
275/328
.478/.447
662 hp
719
808		-253/188
74.3%
-
.425/.334
Indy 401-1 Alum245/1102.19/1.8158-139/114
82%		195/147
75.4%
51.8/57.1
153/169
.647/.59
401 hp		241/172
71.4%
64/66.8
190/198
.60/.518
496 hp
538		272/189
69.5%
72.2/73.5
214/218
.542/.455
560 hp
607		288/197
68.4%
76.5/76.6
227/227
.478/.395
592 hp
643
723		288/205
71.2%
76.5/79.7
227/236
.41/.353
592 hp
643
723		-237/171
72%
1.18/1.86
.443/.367
Indy 401-1 Full Porting Alum275/1252.19/1.81N/A-147/120
81.6%		208/158
76%
55.2/61.4
164/182
.69/.634
428 hp		257/186
72.4%
68.2/72.3
202/214
.64/.56
529 hp
574		297/207
69.7%
78.8/80.4
234/238
.591/.499
611 hp
663		329/224
68.1%
87.3/87.1
259/258
.546/.45
677 hp
734
826		354/238
67.2%
94/92.5
278/274
.503/.41
728 hp
790
888		-265/189
71.2%
1.29/1.90
.443/.367
Indy 401-1 CNC Alum300/1342.25/1.8169--239/175
73.2%
60.1/68
178/202
.772/.703
492 hp		298/214
71.8%
74.9/83.2
222/246
.722/.644
613 hp
665		349/254
72.8%
87.8/98.7
260/292
.676/.612
718 hp
779		376/274
72.9%
94.6/106
280/316
.607/.55
773 hp
839
944		388/285
73.5%
97.6/111
289/328
.537/.49
798 hp
866
974		390/287
73.6%
98.1/112
291/330
.472/.432
802 hp
870
979		340/248
73%
1.30/2.14
.456/.367
Indy 401-1 Ported RadAMX AlumN/A2.19/1.81
-
No Pipe		N/A54/60
111%		131/112
85.5%		197/153
77.7%
52.3/59.5
155/176
.654/.614
405 hp		253/185
73.1%
67.2/71.9
199/213
.63/.557
520 hp
565		299/211
70.6%
79.4/82
235/243
.595/.508
615 hp
667		340/234
68.8%
90.3/90.9
267/269
.564/.47
699 hp
759
853		360/249
69.2%
95.6/96.8
283/287
.512/.428
741 hp
803
904		-263/191
72.4%
-
.443/.367


Audi     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .050 .100 .150 .200 .250 .300 .350 .380 .400 .450 .500 Average
1.8l T 20 V Small Port CCHN/A26.9mm/ 29.9mmN/A-------177/171
96.6%
67/78.6
198/233
.32/.417
182 hp
198
222		----
-
-
.214/.238
1.8l T 20 V Small Port Ported CCHN/A26.9mm/ 29.9mmN/A-------238/202
84.9%
90.1/92.8
267/275
.43/.492
245 hp
266
299		----
-
-
.214/.238
1.8l T 20 V Large Port CCHN/A26.9mm/ 29.9mmN/A-------212/195
92%
80.2/89.6
238/265
.383/.475
218 hp
237
266		----
-
-
.214/.238
1.8l T 20 V Large Port Ported CCHN/A26.9mm/ 29.9mmN/A-------257/224
87.2%
97.2/103
288/305
.464/.546
264 hp
287
323		----
-
-
.214/.238
1.8l T 20V CNC HEADS UKN/A26.9mm/ 29.9mm
3.9375
No Pipe		N/A53/-102/89
87.3%		142/-
53.7
159
.65
146.1 hp		178/134
75.3%
67.4/61.6
200/182
.611/.62
183 hp
199		205/-
77.6
230
.563
211 hp
229		222/161
72.5%
84/74
249/219
.508/.497
228 hp
248
279		231/-
87.4
259
.453
238 hp
258
290		-239/176
73.6%
90.4/80.9
268/240
.41/.407
246 hp
267
300		245/182
74.3%
92.7/83.6
275/248
.374/.375
252 hp
273
307		-196/148
-
-
.214/.238
1.8l T 20V Ported CNC HEADS UKN/A26.9mm/ 29.9mm
3.9375
No Pipe		N/A48/-96/83
86.5%		139/-
52.6
156
.636
143.0 hp		179/146
81.6%
67.7/67.1
201/199
.614/.676
184 hp
200		208/-
78.7
233
.571
214 hp
232		228/193
84.6%
86.3/88.7
256/263
.522/.596
235 hp
254
286		242/-
91.6
271
.474
249 hp
270
304		-250/223
89.2%
94.6/102
280/304
.429/.516
257 hp
279
314		256/-
96.9
287
.39
263 hp
286
321		255/250
98%
96.5/115
286/340
.35/.463
262 hp
285
320		206/179
-
-
.214/.238


BMW     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .050 .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 Average
M5 CNC Heads UKN/A1.374/1.198
3.9375
Pipe		N/A42/-86/74
86%		133/-
44.8
133
.703
136.8 hp		182/150
82.4%
61.4/66.5
182/197
.722/.682
187 hp
203		221/-
74.5
221
.701
227 hp
247		245/177
72.2%
82.6/78.5
245/233
.648/.537
252 hp
273
307		255/-
86
255
.578
262 hp
285
320		262/185
70.6%
88.4/82.1
262/243
.52/.421
269 hp
292
329		268/-
90.4
268
.473
276 hp
299
336		271/189
69.7%
91.4/83.8
271/248
.43/.344
279 hp
302
340		-214/155
-
-
.278/.243
M5 Ported CNC Heads UKN/A1.374/1.198
3.9375
Pipe		N/A42/-89/73
82%		134/-
45.2
134
.709
137.8 hp		175/159
90.9%
59/70.5
175/209
.694/.723
180 hp
195		212/-
71.5
212
.673
218 hp
237		239/193
80.8%
80.6/85.6
239/254
.632/.585
246 hp
267
300		263/-
88.7
263
.596
271 hp
293
330		278/208
74.8%
93.7/92.3
278/273
.551/.473
286 hp
310
349		288/-
97.1
288
.508
296 hp
321
361		292/208
71.2%
98.5/92.3
292/273
.463/.379
300 hp
326
366		295/-
99.5
295
.426
303 hp
329
370		227/168
-
-
.278/.243
EVO 3N/A37mm/ 32mmN/A-92/77
83.7%		-185/165
89.2%
55.5/66.2
164/196
.692/.714
190 hp
206		-248/213
85.9%
74.4/85.4
220/253
.619/.614
255 hp
277
311		-264/225
85.2%
79.2/90.2
235/267
.494/.487
272 hp
295
331		268/228
85.1%
80.4/91.4
238/271
.446/.438
276 hp
299
336		273/231
84.6%
81.9/92.7
243/275
.409/.40
281 hp
305
343		-222/190
85.6%
-
.295/.255
Mini Cooper S CHR Motorsports LLC Home Made BenchN/A30.25mm/ 23.25mm
-
Radius on Exhaust		N/A33/31
93.9%		66/51
77.3%		98/77
78.6%
44/58.5
130/173
.598/.611
100.8 hp		127/98
77.2%
57/74.5
169/221
.581/.584
130.6 hp
141.7		153/106
69.3%
68.7/80.5
203/239
.56/.505
157 hp
171		169/111
65.7%
75.9/84.3
225/250
.516/.441
174 hp
189
212		174/113
64.9%
78.1/85.9
231/254
.455/.384
179 hp
194
218		176/115
65.3%
79/87.4
234/259
.403/.342
181 hp
196
221		175/116
66.3%
78.5/88.1
233/261
.356/.307
180 hp
195
220		--142/98.4
69.2%
-
.241/.185
Mini Cooper S CHR Motorsports LLC Home Made BenchN/A31.25mm/ 24.25mm
-
Radius on Exhaust		N/A-83/45
54.2%		-136/107
78.7%
57.2/74.7
169/221
.603/.611
139.9 hp
152		160/120
75%
67.3/83.8
199/248
.567/.548
165 hp
179		179/127
70.9%
75.3/88.7
223/263
.529/.483
184 hp
200
225		182/130
71.4%
76.5/90.8
227/269
.461/.424
187 hp
203
228		191/132
69.1%
80.3/92.2
238/273
.423/.377
196 hp
213
240		193/133
68.9%
81.2/92.9
241/275
.38/.337
199 hp
215
242		--161/113
70.6%
-
.249/.193
Mini Cooper S Ported CHR Motorsports LLC Home Made BenchN/A31.25mm/ 24.25mm
-
Radius on Exhaust		N/A55/35
63.6%		111/69
62.2%		144/102
70.8%
60.6/71.2
179/211
.851/.776
148.1 hp		173/129
74.6%
72.8/90.1
216/267
.766/.736
178 hp
193		200/149
74.5%
84.1/104
249/308
.709/.681
206 hp
223		213/164
77%
89.6/115
265/339
.629/.624
219 hp
238
267		221/172
77.8%
92.9/120
275/356
.559/.561
227 hp
247
277		232/173
74.6%
97.6/121
289/358
.514/.494
239 hp
259
291		236/174
73.7%
99.3/122
294/360
.465/.441
243 hp
263
296		--191/142
74%
-
.249/.193
Mini Cooper S Ported CHR Motorsports LLC Home Made BenchN/A31.25mm/ 24.5mm
-
Radius on Exhaust		N/A55/42
76.4%		111/80
72.1%		144/123
85.4%
60.6/84.2
179/249
.851/.927
148.1 hp		173/151
87.3%
72.8/103
216/306
.766/.853
178 hp
193		200/161
80.5%
84.1/110
249/326
.709/.728
206 hp
223		213/165
77.5%
89.6/113
265/335
.629/.622
219 hp
238
267		221/170
76.9%
92.9/116
275/345
.559/.549
227 hp
247
277		232/172
74.1%
97.6/118
289/349
.514/.486
239 hp
259
291		236/173
73.3%
99.3/118
294/351
.465/.434
243 hp
263
296		--191/149
78.1%
-
.249/.195
Mini Cooper S MadnessN/A30.25mm/ 23.25mmN/A32/30
93.8%		69/69
100%		103/93
90.3%
46.2/70.7
137/209
.629/.738
105.9 hp		136/104
76.5%
61/79
181/234
.622/.619
139.9 hp
152		163/108
66.3%
73.2/82.1
217/243
.597/.514
168 hp
182		178/110
61.8%
79.9/83.6
237/248
.543/.437
183 hp
199
223		178/111
62.4%
79.9/84.3
237/250
.466/.378
183 hp
199
223		179/111
62%
80.3/84.3
238/250
.41/.33
184 hp
200
225		---144/101
70.2%
-
.241/.185
Mini Cooper S Ported Madness Stage 1N/A30.25mm/ 24.5mmN/A38/37
97.4%		75/70
93.3%		109/107
98.2%
48.9/73.2
145/217
.665/.806
112.1 hp		143/134
93.7%
64.2/91.7
190/272
.654/.757
147.1 hp
160		175/142
81.1%
78.5/97.2
233/288
.641/.642
180 hp
195		198/144
72.7%
88.9/98.5
263/292
.604/.542
204 hp
221
248		211/145
68.7%
94.7/99.2
281/294
.552/.468
217 hp
235
265		217/145
66.8%
97.4/99.2
289/294
.497/.41
223 hp
242
272		---161/127
78.6%
-
.241/.195
Mini Cooper S Ported Madness Stage 2N/A31.5mm/ 24.5mmN/A36/32
88.9%		73/61
83.6%		110/91
82.7%
45.5/62.3
135/184
.645/.686
113.1 hp		145/122
84.1%
60/83.5
178/247
.637/.689
149.1 hp
162		178/152
85.4%
73.7/104
218/308
.626/.687
183 hp
199		213/161
75.6%
88.2/110
261/326
.624/.607
219 hp
238
267		224/164
73.2%
92.7/112
275/332
.563/.53
230 hp
250
281		230/165
71.7%
95.2/113
282/335
.505/.466
237 hp
257
289		---168/131
78.1%
-
.251/.195
Mini Cooper S '01-06 M2 Race Systems98/5430.2mm/ 23.25mm
3.285		3237/26
70.3%		71/61
85.9%		103/86
83.5%
46.4/65.3
137/194
.63/.683
105.9 hp		136/98
72.1%
61.2/74.5
181/221
.623/.584
139.9 hp
152		165/102
61.8%
74.3/77.5
220/230
.605/.486
170 hp
184		182/104
57.1%
82/79
243/234
.556/.413
187 hp
203
228		184/105
57.1%
82.9/79.8
246/236
.482/.357
189 hp
205
231		185/105
56.8%
83.3/79.8
247/236
.424/.313
190 hp
206
232		---147/94.4
64.4%
1.89/1.94
.241/.185
Mini Cooper S '01-06 CNC M2 Race Systems114/6930.2mm/ 23.25mm
3.285		3238/27
71.1%		75/58
77.3%		112/86
76.8%
50.4/65.3
149/194
.685/.683
115.2 hp		146/111
76%
65.7/84.3
195/250
.669/.661
150 hp
163		173/140
80.9%
77.9/106
231/315
.634/.667
178 hp
193		192/158
82.3%
86.5/120
256/356
.587/.627
197 hp
214
241		209/172
82.3%
94.1/131
279/387
.547/.585
215 hp
233
262		221/175
79.2%
99.5/133
295/394
.507/.521
227 hp
247
277		230/176
76.5%
104/134
307/396
.469/.466
237 hp
257
289		--170/135
79.2%
2.02/2.55
.241/.185
Mini Cooper S '01-06 CNC M2 Race Systems 1mmOS Valves114/6931.2mm/ 24.25mm
3.285		3241/28
68.3%		80/64
80%		118/99
83.9%
49.8/69.1
148/205
.698/.754
121.4 hp		155/126
81.3%
65.4/88
194/261
.688/.719
159 hp
173		180/150
83.3%
75.9/105
225/310
.639/.685
185 hp
201		196/162
82.7%
82.7/113
245/335
.58/.617
202 hp
219
246		210/172
81.9%
88.6/120
263/356
.532/.561
216 hp
234
264		224/176
78.6%
94.5/123
280/364
.497/.502
230 hp
250
281		234/177
75.6%
98.7/124
293/366
.461/.449
241 hp
261
294		--175/141
80.6%
2.05/2.57
.249/.193
Mini Cooper S Ported Cosworth Stage 1N/A31.25mm/ 24.25N/A35/30
85.7%		74/54
73%		107/81
75.7%
45/56.6
133/168
.632/.617
110.1 hp		138/102
73.9%
58/71.2
172/211
.611/.582
141.9 hp
154		165/118
71.5%
69.4/82.4
206/244
.585/.539
170 hp
184		186/128
68.8%
78.2/89.4
232/265
.549/.487
191 hp
208
233		201/134
66.7%
84.5/93.6
250/277
.509/.437
207 hp
224
252		210/137
65.2%
88.3/95.7
262/284
.465/.391
216 hp
234
264		---154/108
69.8%
-
.249/.193
Mini Cooper S Ported JCWN/A-N/A34/29
85.3%		72/58
80.6%		105/86
81.9%
-
108.0 hp		137/117
85.4%
-
140.9 hp
153		165/124
75.2%
-
170 hp
184		182/128
70.3%
-
187 hp
203
228		189/129
68.3%
-
194 hp
211
237		186/130
69.9%
-
191 hp
208
233		---148/110
74.5%
Mini SOHC Sabre HeadsN/A30.2mm/ 23.3mm
77mm
No Pipe		-34/26
76.5%		70/56
80%		107/79
73.8%
48.2/59.8
143/177
.654/.626
110.1 hp		140/98
70%
63/74.1
187/220
.642/.582
144.0 hp
156		166/105
63.3%
74.8/79.4
221/235
.609/.499
171 hp
185		180/108
60%
81.1/81.7
240/242
.55/.428
185 hp
201
226		181/108
59.7%
81.5/81.7
242/242
.474/.367
186 hp
202
227		186/108
58.1%
83.8/81.7
248/242
.426/.321
191 hp
208
233		188/109
58%
84.7/82.5
251/244
.383/.288
193 hp
210
236		188/109
58%
84.7/82.5
251/244
.345/.259
193 hp
210
236		-156/97.8
62.6%
-
.241/.186
Mini SOHC Ported Sabre HeadsN/A30.2mm/ 23.3mm
77mm
No Pipe		-35/27
77.1%		70/66
94.3%		105/106
101%
47.3/80.2
140/238
.642/.84
108.0 hp		139/126
90.6%
62.6/95.3
185/282
.637/.749
143.0 hp
155		170/129
75.9%
76.6/97.6
227/289
.623/.613
175 hp
190		190/131
68.9%
85.6/99.1
254/294
.581/.519
195 hp
212
238		200/132
66%
90.1/99.9
267/296
.524/.448
206 hp
223
251		205/132
64.4%
92.3/99.9
274/296
.47/.392
211 hp
229
257		210/133
63.3%
94.6/101
280/298
.428/.351
216 hp
234
264		212/134
63.2%
95.5/101
283/300
.389/.318
218 hp
237
266		-167/121
72.6%
-
.241/.186
 
 
_BMW     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume 2mm 4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 22mm Average
M20B25_885 Ported /Andre' NorrbackN/A42mm/36mm
85mm
No Pipe		N/A42/31
73.8%		82/61
74.4%		119/84
70.6%
55.4/53.2
164/158
.664/.547
122.4 hp		154/103
66.9%
71.7/65.3
212/193
.645/.503
158 hp
172		170/112
65.9%
79.2/71
235/210
.569/.438
175 hp
190		177/119
67.2%
82.4/75.4
244/223
.494/.387
182 hp
198
222		181/122
67.4%
84.3/77.3
250/229
.433/.34
186 hp
202
227		184/-
85.7
254
.385
189 hp
205
231		---152/100
-
-
.335/.287
M20B25 AMC Ported /Andre' NorrbackN/A42mm/35mm
86mm
No Pipe		N/A48/36
75%		86/68
79.1%		115/100
87%
53.6/67.1
159/199
.642/.67
118.3 hp		138/107
77.5%
64.3/71.8
190/213
.578/.538
141.9 hp
154		156/117
75%
72.6/78.5
215/232
.522/.47
160 hp
174		159/120
75.5%
74/80.5
219/238
.444/.402
164 hp
177
200		161/120
74.5%
75/80.5
222/238
.385/.344
166 hp
180
202		161/120
74.5%
75/80.5
222/238
.337/.301
166 hp
180
202		---139/107
77%
-
.335/.279
M52B20 Roadster Ported /Andre' NorrbackN/A30mm/27mm
85mm
No Pipe		N/A55/51
92.7%		112/98
87.5%		162/122
75.3%
73.9/68.7
219/204
.633/.53
167 hp		186/138
74.2%
84.9/77.7
252/230
.545/.449
191 hp
208		189/148
78.3%
86.3/83.4
256/247
.443/.386
194 hp
211		190/152
80%
86.7/85.6
257/254
.371/.33
195 hp
212
238		-----168/132
78.4%
-
.239/.215


Buick     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 Average
Buick 215 V8 AlumN/A1.525/1.35N/A---128/81
63.3%
70.1/56.6
208/168
.457/.327
263 hp
286		-----
-
-
.309/.273
Buick 300 V8 AlumN/A1.625/1.312N/A-105/96
91.4%		135/108
80%
65.1/79.9
193/237
.604/.598
278 hp		142/115
81%
68.5/85.1
203/252
.476/.478
292 hp
317		149/115
77.2%
71.8/85.1
213/252
.40/.382
307 hp
333		154/116
75.3%
74.3/85.8
220/254
.344/.321
317 hp
344
387		--137/110
80.3%
-
.329/.266
Buick 300 V8 Ported AlumN/A1.775/1.50
-
No Pipe		N/A66/47
71.2%		129/104
80.6%		174/130
74.7%
70.3/73.6
208/218
.712/.63
358 hp		191/146
76.4%
77.2/82.6
229/245
.587/.531
393 hp
426		196/152
77.6%
79.2/86
235/255
.481/.442
403 hp
437		---173/133
77.1%
-
.359/.304
Buick Nailhead Stock IronN/A1.875/1.437
4.00
No Pipe		12463/41
65.1%		110/81
73.6%		146/101
69.2%
52.9/62.3
157/185
.566/.511
300 hp		183/107
58.5%
66.3/66
196/195
.532/.406
376 hp
408		188/111
59%
68.1/68.4
202/203
.437/.337
387 hp
420		---157/100
63.8%
-
.380/.291
Buick Nailhead '57 889 Mild Ported RnD Engineering IronN/A1.875/1.437
4.00
No Pipe		12464/47
73.4%		126/76
60.3%		169/99
58.6%
61.2/61
181/181
.655/.501
348 hp		196/111
56.6%
71/68.4
210/203
.57/.421
403 hp
437		196/116
59.2%
71/71.5
210/212
.456/.352
403 hp
437		---172/101
58.5%
-
.380/.291
Buick Nailhead '66 401 Stock Babeola IronN/A1.87/1.5012453/47
88.7%		110/78
70.9%		157/103
65.6%
57.2/58.3
169/173
.61/.499
323 hp		180/117
65%
65.5/66.2
194/196
.525/.425
370 hp
402		190/120
63.2%
69.2/67.9
205/201
.443/.349
391 hp
424		196/123
62.8%
71.4/69.6
211/206
.381/.298
403 hp
437
492		--167/108
64.9%
-
.379/.304
Buick Nailhead 401 Ported Gessler IronN/A1.875/1.50N/A62/48
77.4%		127/83
65.4%		171/108
63.2%
61.9/61.1
183/181
.663/.523
352 hp		197/130
66%
71.3/73.6
211/218
.573/.472
405 hp
440		212/138
65.1%
76.8/78.1
227/231
.493/.401
436 hp
473		219/141
64.4%
79.3/79.8
235/236
.424/.342
451 hp
489
550		--185/120
64.8%
-
.380/.304
Buick GN IronN/A1.71/1.50N/A----156/110
70.5%
67.9/62.2
201/184
.398/.32
241 hp
261		----
-
-
.346/.304
Buick GN IronN/A1.71/1.50N/A52/45
86.5%		108/84
77.8%		149/101
67.8%
64.9/57.2
192/169
.633/.489
230 hp		152/108
71.1%
66.2/61.1
196/181
.484/.392
235 hp
254		155/111
71.6%
67.5/62.8
200/186
.395/.323
239 hp
259		---141/101
71.6%
-
.346/.304
Buick GN IronN/A1.71/1.50N/A54/50
92.6%		111/96
86.5%		161/131
81.4%
70.1/74.1
208/220
.684/.635
248 hp		177/136
76.8%
77.1/77
228/228
.564/.494
273 hp
296		178/136
76.4%
77.5/77
230/228
.454/.395
275 hp
298		---157/125
79.6%
-
.346/.304
Buick GN Ported IronN/A1.77/1.50N/A---196/157
80.1%
79.7/88.8
236/263
.604/.57
302 hp
328		-----
-
-
.358/.304
Buick GN Ported IronN/A1.77/1.50N/A59/49
83.1%		127/98
77.2%		175/142
81.1%
71.1/80.4
211/238
.719/.688
270 hp		193/154
79.8%
78.4/87.1
232/258
.594/.56
298 hp
323		202/156
77.2%
82.1/88.3
243/262
.498/.453
312 hp
338		---174/138
78.9%
-
.358/.304
Buick GN Ported VPE IronN/A-N/A---206/173
84%
-
318 hp
345		217/181
83.4%
-
335 hp
363		221/184
83.3%
-
341 hp
370
416		--215/179
83.5%
Buick GN1 Mild Ported SF600N/A1.77/1.50
3.875		N/A62/51
82.3%		128/106
82.8%		182/139
76.4%
74/78.7
219/233
.747/.673
281 hp		216/164
75.9%
87.8/92.8
260/275
.665/.596
333 hp
362		228/172
75.4%
92.7/97.3
275/288
.562/.50
352 hp
382		228/177
77.6%
92.7/100
275/297
.468/.429
352 hp
382
429		--196/152
77.2%
-
.358/.304
Buick GN1 PortedN/A1.77/1.50N/A64/52
81.3%		143/115
80.4%		206/149
72.3%
83.7/84.3
248/250
.846/.722
318 hp		237/181
76.4%
96.3/102
285/303
.73/.658
366 hp
397		244/197
80.7%
99.2/111
294/330
.601/.573
376 hp
408		---208/161
77.3%
-
.358/.304
TA Performance Street Intimidator156/721.94/1.60
4.00
No Pipe		4659/61
103%		118/107
90.7%		167/143
85.6%
56.5/71.1
167/211
.626/.65
258 hp		210/162
77.1%
71/80.6
211/239
.59/.552
324 hp
352		210/177
84.3%
71/88
211/261
.472/.482
324 hp
352		213/180
84.5%
72.1/89.5
214/265
.399/.409
329 hp
357
401		--184/154
83.8%
1.37/2.50
.393/.324
TA Performance Street Eliminator163/731.94/1.6046/5559/42
71.2%		108/87
80.6%		156/121
77.6%
52.8/60.2
156/178
.584/.55
241 hp		184/135
73.4%
62.2/67.1
184/199
.517/.46
284 hp
308		195/144
73.8%
66/71.6
195/212
.438/.392
301 hp
326		204/145
71.1%
69/72.1
204/214
.382/.329
315 hp
341
384		--169/126
74.6%
1.25/1.99
.393/.324
TA Performance Street Eliminator Ported163/731.94/1.60N/A87/49
56.3%		150/100
66.7%		204/139
68.1%
69/69.1
204/205
.764/.631
315 hp		235/184
78.3%
79.5/91.5
236/271
.66/.627
363 hp
393		263/195
74.1%
89/97
264/287
.591/.531
406 hp
440		266/204
76.7%
90/101
267/301
.498/.463
410 hp
445
501		--224/164
73.5%
1.63/2.79
.393/.324
Buick V6 Stage II Ported Chapman247/-2.10/1.62540.568/53
77.9%		145/113
77.9%		221/174
78.7%
63.8/83.9
189/249
.765/.778
341 hp		281/213
75.8%
81.1/103
240/304
.729/.714
434 hp
470		321/229
71.3%
92.7/110
275/327
.667/.614
495 hp
537		336/241
71.7%
97/116
287/344
.581/.539
518 hp
562
632		341/247
72.4%
98.5/119
292/353
.506/.473
526 hp
571
642		-274/203
74%
1.38
.425/.329
Buick TA Ported to Stage I IronN/A2.13/1.75N/A66/57
86.4%		133/109
82%		188/133
70.7%
52.8/55.3
156/164
.641/.552
387 hp		226/147
65%
63.4/61.1
188/181
.578/.458
465 hp
504		236/159
67.4%
66.2/66.1
196/196
.483/.396
485 hp
527		234/159
67.9%
65.7/66.1
195/196
.399/.33
481 hp
522
587		233/162
69.5%
65.4/67.4
194/200
.341/.288
479 hp
520
585		-208/145
69.5%
-
.431/.354
Buick Ported Smithberg Racing IronN/A-N/A72/-143/-204/-
-
420 hp		262/-
-
539 hp
585		280/-
-
576 hp
625		284/-
-
584 hp
634
713		--235
Buick Stage I IronN/A2.13/1.75N/A-----230/189
82.2%
64.5/78.6
191/233
.392/.392
473 hp
513
577		---
-
-
.431/.354
Buick Stage I '74 IronN/A2.13/1.75N/A----218/139
63.8%
61.2/57.8
181/171
.446/.346
448 hp
487		----
-
-
.431/.354
Buick Stage I Ported IronN/A-N/A-----295/205
69.5%
-
607 hp
658
740		---
Buick Stage I Ported IronN/A-N/A74/-158/-233/-
-
479 hp		280/-
-
576 hp
625		292/-
-
601 hp
652		292/-
-
601 hp
652
733		--251
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 Average
Buick Stage I Ported IronN/A-N/A73/-153/-222/-
-
457 hp		276/-
-
568 hp
616		304/-
-
625 hp
679		297/-
-
611 hp
663
745		--250
Buick Stage IIN/A2.13/1.75N/A-----236/213
90.3%
66.2/88.6
196/262
.403/.442
485 hp
527
592		---
-
-
.431/.354
Buick 350 Rick Crawford IronN/AStockN/A55/44
80%		112/100
89.3%		165/119
72.1%
-
339 hp		199/137
68.8%
-
409 hp
444		196/146
74.5%
-
403 hp
437		199/149
74.9%
-
409 hp
444
499		--174/130
74.7%
Buick 350 Rick Crawford Ported IronN/A1.92/1.55N/A65/66
101%		122/114
93.4%		180/150
83.3%
62.2/79.5
184/236
.681/.703
370 hp		236/179
75.8%
81.5/94.9
242/281
.67/.629
485 hp
527		260/191
73.5%
89.8/101
266/300
.59/.537
535 hp
580		264/199
75.4%
91.2/105
270/312
.50/.467
543 hp
589
663		--212/167
78.4%
-
.389/.314
Buick 455 IronN/A2.00/1.625N/A59/52
88.1%		120/100
83.3%		175/124
70.9%
55.7/59.8
165/177
.636/.555
360 hp		208/140
67.3%
66.2/67.5
196/200
.567/.47
428 hp
464		218/147
67.4%
69.4/70.9
206/210
.475/.394
448 hp
487		---180/128
70.9%
-
.405/.329
Buick 455 Iron184/1422.125/1.75N/A-----220/150
68.2%
62/62.4
184/185
.376/.311
453 hp
491
552		---
-
1.20/1.06
.430/.354
Buick 455 Ported Gessler IronN/A2.125/1.75N/A71/61
85.9%		146/119
81.5%		213/145
68.1%
60.1/60.3
178/179
.728/.602
438 hp		259/172
66.4%
73/71.5
216/212
.664/.536
533 hp
578		270/187
69.3%
76.1/77.7
226/230
.554/.466
555 hp
603		264/195
73.9%
74.4/81.1
221/240
.451/.405
543 hp
589
663		--230/164
71%
-
.430/.354
Buick 430 (Stage 1 Valves) Charlie Evans IronN/A2.125/1.75N/A76/57
75%		142/97
68.3%		198/124
62.6%
55.8/51.6
165/153
.677/.515
407 hp		227/142
62.6%
64/59
190/175
.582/.442
467 hp
507		225/152
67.6%
63.4/63.2
188/187
.462/.379
463 hp
502		227/156
68.7%
64/64.9
190/192
.388/.324
467 hp
507
570		--204/134
65.8%
-
.430/.354
Buick Converted to Stage 1 Valves TA IronN/A2.13/1.755N/A66/57
86.4%		133/109
82%		188/133
70.7%
52.8/55
156/163
.641/.551
387 hp		226/147
65%
63.4/60.8
188/180
.578/.457
465 hp
504		236/159
67.4%
66.2/65.7
196/195
.483/.395
485 hp
527		233/159
68.2%
65.4/65.7
194/195
.397/.329
479 hp
520
585		233/162
69.5%
65.4/67
194/198
.341/.287
479 hp
520
585		-208/145
69.6%
-
.431/.355
Buick 430 985 Ported TA SF600 IronN/A2.13/1.755
4.350		N/A-142/109
76.8%		202/155
76.7%
56.7/64.1
168/190
.689/.642
416 hp		250/176
70.4%
70.2/72.8
208/216
.64/.547
514 hp
558		287/199
69.3%
80.5/82.3
239/244
.588/.494
590 hp
641		300/204
68%
84.2/84.3
249/250
.512/.422
617 hp
670
753		--236/169
71.4%
-
.431/.355
Bulldog AlumN/A2.125/1.75N/A82/62
75.6%		144/114
79.2%		204/155
76%
57.5/64.4
170/191
.698/.644
420 hp		253/184
72.7%
71.3/76.5
211/227
.649/.573
520 hp
565		293/201
68.6%
82.6/83.6
245/248
.601/.501
603 hp
654		303/215
71%
85.4/89.4
253/265
.518/.446
623 hp
676
760		--239/174
72.6%
-
.430/.354
Bulldog Ported Earick Racing AlumN/A-N/A101/-162/-234/-
-
481 hp		344/-
-
708 hp
768		349/-
-
718 hp
779		380/-
-
782 hp
848
954		--294
Edelbrock Performer RPM 60049 SF1020 Alum215/1302.125/1.756868/58
85.3%		127/108
85%		190/150
78.9%
53.6/62.4
159/185
.65/.623
391 hp		241/173
71.8%
68/71.9
201/213
.618/.539
496 hp
538		274/183
66.8%
77.3/76.1
229/225
.562/.456
564 hp
612		273/190
69.6%
77/79
228/234
.467/.395
562 hp
609
685		--221/161
72.8%
1.27/1.46
.430/.354
Edelbrock Performer RPM 60049 Mike AlumN/A2.125/1.75N/A68/55
80.9%		130/107
82.3%		194/144
74.2%
54.7/59.9
162/177
.663/.598
399 hp		251/164
65.3%
70.8/68.2
210/202
.644/.511
516 hp
560		278/172
61.9%
78.4/71.5
232/212
.57/.429
572 hp
620		283/175
61.8%
79.8/72.8
236/216
.484/.363
582 hp
632
710		281/175
62.3%
79.2/72.8
235/216
.412/.311
578 hp
627
705		-236/156
66.1%
-
.430/.354
Edelbrock Performer RPM 60049 George AlumN/A2.125/1.75N/A66/55
83.3%		126/103
81.7%		192/139
72.4%
54.1/57.8
160/171
.657/.577
395 hp		247/162
65.6%
69.6/67.4
206/200
.634/.505
508 hp
551		279/175
62.7%
78.7/72.8
233/216
.572/.436
574 hp
623		276/183
66.3%
77.8/76.1
231/225
.472/.38
568 hp
616
693		278/185
66.5%
78.4/76.9
232/228
.407/.329
572 hp
620
698		-233/158
67.7%
-
.430/.354
Edelbrock Performer RPM Ported SF600 AlumN/A2.125/1.75N/A66/59
89.4%		137/115
83.9%		206/154
74.8%
58.1/64
172/190
.705/.64
424 hp		260/177
68.1%
73.3/73.6
217/218
.667/.551
535 hp
580		296/188
63.5%
83.5/78.2
247/232
.607/.468
609 hp
661		301/194
64.5%
84.9/80.7
251/239
.515/.403
619 hp
672
755		--240/166
69%
-
.430/.354
Edelbrock Ported Gessler Level 2 AlumN/A2.125/1.75N/A68/66
97.1%		142/116
81.7%		210/155
73.8%
59.2/64.4
175/191
.718/.644
432 hp		260/176
67.7%
73.3/73.2
217/217
.667/.548
535 hp
580		294/187
63.6%
82.9/77.7
246/230
.603/.466
605 hp
656		305/193
63.3%
86/80.2
255/238
.522/.401
627 hp
681
766		--242/165
68.3%
-
.430/.354
TA Performance Ported 455 IronN/A2.13/1.75N/A-----250/180
72%
70.2/74.8
208/222
.426/.374
514 hp
558
627		---
-
-
.431/.354
TA Performance Street Eliminator SF600N/A2.16/1.755N/A72/-149/-194/161
83%
52.9/66.6
157/197
.653/.667
399 hp		249/190
76.3%
68/78.5
201/233
.628/.59
512 hp
556		285/206
72.3%
77.8/85.2
230/252
.575/.512
586 hp
636		290/211
72.8%
79.1/87.2
234/258
.488/.437
597 hp
647
728		281/211
75.1%
76.7/87.2
227/258
.405/.374
578 hp
627
705		-241/196
-
-
.437/.355
TA Performance Street EliminatorN/A2.26/1.755N/A70/59
84.3%		140/112
80%		194/161
83%
48.4/66.6
143/197
.624/.667
399 hp		249/190
76.3%
62.1/78.5
184/233
.601/.59
512 hp
556		285/206
72.3%
71/85.2
211/252
.55/.512
586 hp
636		290/211
72.8%
72.3/87.2
214/258
.466/.437
597 hp
647
728		281/211
75.1%
70/87.2
208/258
.387/.374
578 hp
627
705		-240/182
75.8%
-
.458/.355
TA Performance Street Eliminator Stage 1 Ported263/1792.26/1.7556950/57
114%		149/122
81.9%		214/167
78%
53.3/69
158/205
.688/.692
440 hp		276/197
71.4%
68.8/81.4
204/241
.666/.612
568 hp
616		329/226
68.7%
82/93.4
243/277
.635/.562
677 hp
734		361/237
65.7%
90/98
267/290
.58/.491
743 hp
806
906		--266/190
71.4%
1.37/1.32
.458/.355
TA Performance Street Eliminator Stage 1 Ported GesslerN/A2.16/1.755N/A70/61
87.1%		144/112
77.8%		208/165
79.3%
56.8/68.2
168/202
.70/.683
428 hp		266/194
72.9%
72.6/80.2
215/238
.671/.603
547 hp
594		310/214
69%
84.6/88.5
251/262
.626/.532
638 hp
692		328/226
68.9%
89.5/93.4
265/277
.552/.468
675 hp
732
823		--251/182
72.5%
-
.437/.355
TA Performance Street Eliminator Stage 2 Kerry SF600N/A2.16/1.755
4.375		N/A72/-149/-218/-
59.5
176
.733
448 hp		273/-
74.5
221
.689
562 hp
609		298/-
81.3
241
.602
613 hp
665		295/-
80.5
239
.496
607 hp
658
740		300/-
81.9
243
.433
617 hp
670
753		-256
-
-
.437/.355
TA Performance Street Eliminator Stage 2 Ported Kerry SF600N/A2.16/1.755
4.375
No Pipe		N/A75/69
92%		157/128
81.5%		238/176
73.9%
65/72.8
192/216
.801/.729
490 hp		305/222
72.8%
83.2/91.8
247/272
.77/.689
627 hp
681		347/251
72.3%
94.7/104
281/307
.70/.624
714 hp
774		361/263
72.9%
98.5/109
292/322
.607/.545
743 hp
806
906		360/265
73.6%
98.2/110
291/325
.519/.47
741 hp
803
904		367/266
72.5%
100/110
297/326
.463/.413
755 hp
819
921		305/224
73.6%
-
.437/.355
TA Performance Street Eliminator Stage 2 Ported Kerry SF600N/A2.16/1.755
4.375
2 1/8" Pipe		N/A75/70
93.3%		157/135
86%		238/187
78.6%
65/77.3
192/229
.801/.774
490 hp		305/236
77.4%
83.2/97.6
247/289
.77/.733
627 hp
681		347/273
78.7%
94.7/113
281/334
.70/.678
714 hp
774		361/294
81.4%
98.5/122
292/360
.607/.609
743 hp
806
906		360/304
84.4%
98.2/126
291/372
.519/.54
741 hp
803
904		367/306
83.4%
100/126
297/375
.463/.475
755 hp
819
921		305/248
81.3%
-
.437/.355
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 Average
TA Performance TE Stage 2 Ported AlumN/A2.26/1.755
4.50		67------388/268
69.1%
96.7/111
287/328
.535/.476
798 hp
866
974		--
-
-
.458/.355
TA Performance Stage 1 Out of Box Jim Weise AlumN/A2.13/1.75N/A66/56
84.8%		140/112
80%		203/145
71.4%
57/60.3
169/179
.693/.602
418 hp		248/182
73.4%
69.6/75.7
206/224
.635/.567
510 hp
554		269/193
71.7%
75.5/80.2
224/238
.551/.481
553 hp
600		279/197
70.6%
78.3/81.9
232/243
.476/.409
574 hp
623
700		276/200
72.5%
77.5/83.2
230/246
.404/.356
568 hp
616
693		-236/172
72.7%
-
.431/.354
TA Performance Stage 1 Ported Jim Weise AlumN/A2.13/1.755N/A74/60
81.1%		152/126
82.9%		221/174
78.7%
62/71.9
184/213
.754/.721
455 hp		274/205
74.8%
76.9/84.7
228/251
.701/.637
564 hp
612		314/228
72.6%
88.1/94.3
261/279
.643/.566
646 hp
701		314/230
73.2%
88.1/95.1
261/282
.536/.476
646 hp
701
788		315/230
73%
88.4/95.1
262/282
.461/.408
648 hp
703
791		-265/199
75%
-
.431/.355
TA Performance Stage 1 Base AlumN/A2.13/1.755N/A-----280/200
71.4%
78.6/82.7
233/245
.478/.414
576 hp
625
703		---
-
-
.431/.355
TA Performance Stage 1 Ported AlumN/A2.13/1.755N/A-----350/205
58.6%
98.2/84.7
291/251
.597/.424
720 hp
781
878		---
-
-
.431/.355
TA Performance Stage 2 AlumN/A2.13/1.75N/A-----300/240
80%
84.2/99.8
249/296
.512/.498
617 hp
670
753		---
-
-
.431/.354
TA Performance Stage 2 Ported AlumN/A2.13/1.75N/A-----350/260
74.3%
98.2/108
291/320
.597/.54
720 hp
781
878		---
-
-
.431/.354
TA Performance Ported AlumN/A2.125/1.75N/A-----315/230
73%
88.8/95.6
263/283
.539/.478
648 hp
703
791		---
-
-
.430/.354
TA Performance Stage 3 AlumN/A2.25/1.8058-----330/255
77.3%
83/100
246/297
.533/.515
679 hp
737
828		---
-
-
.456/.365
TA Performance Stage 3 Ported AlumN/A2.30/1.8058-----385/270
70.1%
92.7/106
275/314
.608/.545
792 hp
859
966		---
-
-
.466/.365
TA Performance Stage 3 Ported Alum250/-2.225/1.81N/A----350/233
66.6%
90/90.6
267/268
.686/.561
720 hp
781		360/263
73.1%
92.6/102
274/303
.588/.528
741 hp
803
904		--355/248
69.9%
1.44
.451/.367
TA Performance Stage 3 Alum Ported Bruce KentN/A2.225/1.80N/A-----330/255
77.3%
84.9/100
251/297
.539/.515
679 hp
737
828		385/295
76.6%
99/116
293/343
.539/.51
792 hp
859
966		-358/275
76.9%
-
.451/.365
TA Performance Stage 4 AlumN/A2.25/1.8058-----325/230
70.8%
81.7/90.4
242/268
.525/.464
669 hp
725
816		---
-
-
.456/.365
TA Performance Stage 4 AlumN/A2.25/1.80N/A-----375/265
70.7%
94.3/104
279/309
.606/.535
771 hp
837
941		---
-
-
.456/.365
TA Performance Stage 4 AlumN/A2.25/1.80N/A76/65
85.5%		147/129
87.8%		218/179
82.1%
54.8/70.3
162/208
.704/.723
448 hp		266/222
83.5%
66.9/87.2
198/258
.644/.672
547 hp
594		321/247
76.9%
80.7/97.1
239/288
.622/.598
660 hp
716		362/260
71.8%
91/102
270/303
.585/.525
745 hp
808
909		--263/207
78.9%
-
.456/.365
TA Performance Stage 4 Ported AlumN/A2.30/1.8058-----395/270
68.4%
95.1/106
282/314
.624/.545
813 hp
882
991		---
-
-
.466/.365
TA Performance Stage 4 Ported AlumN/A2.20/-
4.40		N/A74/-154/-225/-
59.2
175
.743
463 hp		281/-
73.9
219
.696
578 hp
627		335/-
88.1
261
.664
689 hp
748		369/-
97.1
288
.609
759 hp
824
926		378/-
99.4
295
.535
778 hp
844
949		-290
-
-
.446
TA Performance Stage 4 Ported AlumN/A2.26/-
4.40		N/A70/-140/-204/-
50.9
151
.656
420 hp		269/-
67.1
199
.649
553 hp
600		325/-
81
240
.627
669 hp
725		360/-
89.7
266
.579
741 hp
803
904		385/-
96
284
.531
792 hp
859
966		-281
-
-
.458


Cadillac     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .650 .700 .800 .850 Average
Cadillac MTS IronN/A-N/A55/41
74.5%		96/58
60.4%		147/110
74.8%
-
302 hp		195/126
64.6%
-
401 hp
435		225/137
60.9%
-
463 hp
502		240/143
59.6%
-
494 hp
536
602		----181/115
63.6%
Cadillac Ported MTS IronN/A-N/A68/57
83.8%		137/105
76.6%		191/137
71.7%
-
393 hp		243/175
72%
-
500 hp
542		268/192
71.6%
-
551 hp
598		285/204
71.6%
-
586 hp
636
715		286/208
72.7%
-
588 hp
638
718		288/210
72.9%
-
592 hp
643
723		--243/176
72.5%
Cadillac 902 '69200/1451.96/-7683/73
88%		134/107
79.9%		180/140
77.8%
59.7
177
.667
370 hp		215/164
76.3%
71.3
211
.598
442 hp
480		248/181
73%
82.2
244
.552
510 hp
554		263/191
72.6%
87.2
258
.488
541 hp
587
660		-277/206
74.4%
91.8
272
.44
570 hp
618
695		--220/165
75.1%
1.39/1.42
.397
Cadillac Ported Potter Automotive IronN/A2.19/1.8476-----320/-
85
252
.531
658 hp
714
803		-----
-
-
.443/.373
Cadillac 185/1242.00/1.62576-119/87
73.1%		162/129
79.6%
51.6/62.2
153/184
.589/.577
333 hp		214/149
69.6%
68.1/71.8
202/213
.583/.50
440 hp
478		237/160
67.5%
75.4/77.1
224/229
.517/.429
488 hp
529		240/162
67.5%
76.4/78.1
226/231
.436/.362
494 hp
536
602		----194/137
70.7%
1.30/1.31
.405/.329
Cadillac 493 '75185/1242.00/1.62512068/67
98.5%		130/97
74.6%		190/132
69.5%
60.5/63.6
179/189
.69/.59
391 hp		215/160
74.4%
68.4/77.1
203/229
.586/.537
442 hp
480		233/172
73.8%
74.2/82.9
220/246
.508/.462
479 hp
520		246/-
78.3
232
.447
506 hp
549
617		----203/140
-
1.33/1.39
.405/.329
Cadillac 493 '75 Pocket PortedN/A2.00/1.625N/A94/80
85.1%		148/124
83.8%		186/150
80.6%
59.2/72.3
175/214
.676/.671
383 hp		217/173
79.7%
69.1/83.4
205/247
.591/.58
446 hp
484		246/183
74.4%
78.3/88.2
232/261
.536/.491
506 hp
549		255/189
74.1%
81.2/91.1
241/270
.463/.423
525 hp
569
640		----210/164
77.9%
-
.405/.329
Bulldog Performance AlumN/A-N/A71/57
80.3%		136/102
75%		171/140
81.9%
-
352 hp		230/170
73.9%
-
473 hp
513		270/193
71.5%
-
555 hp
603		294/209
71.1%
-
605 hp
656
738		296/216
73%
-
609 hp
661
743		286/222
77.6%
-
588 hp
638
718		--240/179
74.4%
Bulldog Performance AlumN/A2.19/1.847688/63
71.6%		146/110
75.3%		203/145
71.4%
53.9/54.5
160/162
.674/.573
418 hp		242/178
73.6%
64.2/66.9
190/198
.602/.527
498 hp
540		276/202
73.2%
73.3/76
217/225
.55/.479
568 hp
616		296/224
75.7%
78.6/84.2
233/250
.491/.442
609 hp
661
743		----233/172
73.9%
-
.443/.373
Bulldog Performance Alum260/-2.19/1.847665/61
93.8%		125/117
93.6%		178/159
89.3%
47.3/59.8
140/177
.591/.628
366 hp		238/203
85.3%
63.2/76.3
187/226
.592/.601
490 hp
531		285/219
76.8%
75.7/82.4
224/244
.567/.519
586 hp
636		307/235
76.5%
81.5/88.4
241/262
.509/.464
632 hp
685
771		-302/242
80.1%
80.2/91
238/270
.429/.41
621 hp
674
758		--239/196
81.9%
1.18
.443/.373
Bulldog Performance Ported CPP AlumN/A2.19/1.7739-------360/-
95.6
283
.512
741 hp
803
904		---
-
-
.443/.358
Bulldog / MTS Ported AlumN/A2.25/1.86N/A------345/268
77.7%
86.8/98.6
257/292
.514/.483
710 hp
770
866		----
-
-
.456/.377
Cadillac Performance Parts AlumN/A-N/A-171/109
63.7%		233/149
63.9%
-
479 hp		296/184
62.2%
-
609 hp
661		345/221
64.1%
-
710 hp
770		376/249
66.2%
-
773 hp
839
944		-391/267
68.3%
-
804 hp
873
981		398/278
69.8%
-
819 hp
888
999		402/-
-
827 hp
897
1009		327/208


Chevy     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy Bow Tie171/-2.02/1.60N/A----212/145
68.4%
66.2/72.1
196/214
.458/.395
436 hp
473		211/147
69.7%
65.8/73.1
195/217
.38/.334
434 hp
471
530		----212/146
69%
1.24
.409/.324
Chevy Bow Tie178/--N/A-----221/138
62.4%
-
455 hp
493
555		-----
-
1.24
Chevy Bow Tie 034 Meaux Racing Out of Box SF600 IronN/A2.02/1.60
4.00
Pipe		N/A-119/108
90.8%		171/140
81.9%
53.4/69.6
158/206
.615/.636
352 hp		206/146
70.9%
64.3/72.6
190/215
.556/.497
424 hp
460		230/147
63.9%
71.8/73.1
213/217
.496/.401
473 hp
513		217/149
68.7%
67.7/74.1
201/220
.39/.338
446 hp
484
545		219/149
68%
68.3/74.1
202/220
.338/.29
451 hp
489
550		---194/140
72.2%
-
.409/.324
Chevy Bow Tie 034 Ported Meaux Racing SF600 Iron223/-2.085/1.585
4.00
No Pipe		N/A-134/107
79.9%		195/150
76.9%
57.1/76
169/225
.68/.688
401 hp		241/201
83.4%
70.6/102
209/302
.63/.691
496 hp
538		275/216
78.5%
80.5/109
239/324
.575/.594
566 hp
614		293/222
75.8%
85.8/113
254/333
.511/.509
603 hp
654
735		303/224
73.9%
88.7/114
263/336
.453/.44
623 hp
676
760		311/224
72%
91.1/114
270/336
.407/.385
640 hp
694
781		317/225
71%
92.8/114
275/338
.368/.344
652 hp
708
796		-259/196
75.8%
1.42
.422/.321
Chevy Bow Tie 034 Ported Meaux Racing Larger Bore SF600 Iron223/-2.085/1.585
4.125		N/A-138/107
77.5%		199/150
75.4%
58.3/76
173/225
.694/.688
409 hp		246/201
81.7%
72/102
213/302
.643/.691
506 hp
549		279/216
77.4%
81.7/109
242/324
.583/.594
574 hp
623		296/222
75%
86.7/113
257/333
.516/.509
609 hp
661
743		307/224
73%
89.9/114
266/336
.459/.44
632 hp
685
771		316/224
70.9%
92.6/114
274/336
.413/.385
650 hp
705
793		322/225
69.9%
94.3/114
279/338
.374/.344
662 hp
719
808		-263/196
74.6%
1.44
.422/.321
Chevy Bow Tie Tri-Mark Iron178/-2.02/1.60N/A67/58
86.6%		125/90
72%		180/125
69.4%
56.2/62.2
166/184
.648/.568
370 hp		218/135
61.9%
68/67.1
202/199
.588/.46
448 hp
487		220/142
64.5%
68.6/70.6
203/209
.475/.387
453 hp
491		216/147
68.1%
67.4/73.1
200/217
.389/.334
444 hp
482
542		----192/128
66.6%
1.24
.409/.324
Chevy Bow Tie Tri-Mark Ported Stealth Iron178/-2.02/1.60N/A68/60
88.2%		134/117
87.3%		192/152
79.2%
59.9/75.6
178/224
.691/.69
395 hp		228/165
72.4%
71.1/82.1
211/243
.615/.562
469 hp
509		238/170
71.4%
74.3/84.6
220/251
.514/.463
490 hp
531		243/176
72.4%
75.8/87.5
225/259
.437/.40
500 hp
542
610		----207/156
75.4%
1.37
.409/.324
Chevy Bow Tie Tri-Mark Ported Super Stealth Iron178/-2.02/1.60N/A72/60
83.3%		142/115
81%		195/155
79.5%
60.8/77.1
180/228
.702/.704
401 hp		236/170
72%
73.6/84.6
218/251
.637/.579
485 hp
527		246/175
71.1%
76.8/87
227/258
.531/.477
506 hp
549		252/181
71.8%
78.6/90
233/267
.453/.411
518 hp
562
632		----214/159
74.3%
1.42
.409/.324
Chevy Bow Tie 2N/A-N/A----250/174
69.6%
-
514 hp
558		------
Chevy Bow Tie Phase II Iron CCM184/55-6463/57
90.5%		130/100
76.9%		177/119
67.2%
-
364 hp		205/123
60%
-
422 hp
458		225/123
54.7%
-
463 hp
502		210/127
60.5%
-
432 hp
469
527		209/127
60.8%
-
430 hp
466
525		---193/120
62.2%
1.22/2.31
Chevy 186 Fuelie Iron161/652.02/1.606460/38
63.3%		113/76
67.3%		159/110
69.2%
49.6/54.7
147/162
.572/.50
327 hp		182/125
68.7%
56.8/62.2
168/184
.491/.426
374 hp
406		187/135
72.2%
58.4/67.1
173/199
.404/.368
385 hp
417		188/140
74.5%
58.7/69.6
174/206
.338/.318
387 hp
420
472		----166/117
70.7%
1.17/2.15
.409/.324
Chevy 291 Bowl Ported exhaust Cleanup trmnatr IronN/A2.02/1.60N/A60/53
88.3%		125/101
80.8%		181/138
76.2%
56.5/68.6
167/203
.651/.627
372 hp		216/163
75.5%
67.4/81.1
200/240
.583/.555
444 hp
482		227/183
80.6%
70.8/91
210/270
.49/.499
467 hp
507		227/190
83.7%
70.8/94.5
210/280
.408/.431
467 hp
507
570		----195/155
79.4%
-
.409/.324
Chevy 292 Bill Jones IronN/A2.02/1.60
-
No Pipe		N/A61/56
91.8%		120/98
81.7%		164/123
75%
51.2/61.2
152/181
.59/.559
337 hp		190/130
68.4%
59.3/64.7
176/192
.513/.443
391 hp
424		206/132
64.1%
64.3/65.7
190/195
.445/.36
424 hp
460		212/119
56.1%
66.2/59.2
196/175
.381/.27
436 hp
473
532		----178/120
67.5%
-
.409/.324
Chevy 292 Ported Bill Jones IronN/A2.06/1.635
-
No Pipe		N/A68/57
83.8%		141/117
83%		189/171
90.5%
56.7/81.4
168/241
.667/.76
389 hp		222/189
85.1%
66.6/90
197/267
.587/.63
457 hp
495		245/201
82%
73.5/95.7
218/284
.519/.536
504 hp
547		256/207
80.9%
76.8/98.6
228/292
.452/.46
527 hp
571
643		----211/177
84%
-
.417/.331
Chevy 292 Ported Butch Elkins Iron197.4/-2.02/1.625N/A-137/110
80.3%		196/157
80.1%
61.2/75.7
181/224
.705/.702
403 hp		235/185
78.7%
73.3/89.2
217/264
.634/.621
483 hp
525		253/194
76.7%
78.9/93.5
234/277
.546/.521
520 hp
565		267/198
74.2%
83.3/95.5
247/283
.48/.443
549 hp
596
670		----218/169
77.6%
-
.409/.329
Chevy 292 Ported Lee Shepard IronN/A2.04/1.60
4.00
Pipe		N/A-126/128
101%		193/184
95.3%
59/91.5
175/271
.688/.836
397 hp		234/218
93.2%
71.6/108
212/321
.625/.743
481 hp
522		258/230
89.1%
78.9/114
234/339
.551/.627
531 hp
576		269/236
87.7%
82.3/117
244/348
.479/.536
553 hp
600
675		274/239
87.2%
83.8/119
248/352
.418/.465
564 hp
612
688		---226/206
91.2%
-
.413/.324
Chevy 292 Ported Rons Porting Service IronN/A2.04/1.60
4.00
Pipe		N/A-118/120
101%		173/157
90.8%
52.9/78.1
157/231
.616/.713
356 hp		210/183
87.1%
64.2/91
190/270
.561/.623
432 hp
469		240/218
90.8%
73.4/108
218/321
.513/.594
494 hp
536		261/224
85.8%
79.9/111
237/330
.465/.509
537 hp
583
655		274/227
82.8%
83.8/113
248/335
.418/.442
564 hp
612
688		---213/188
88.5%
-
.413/.324
Chevy 292 Ported MadCap Racing Heads Iron194/-2.035/1.60
4.00
Pipe		N/A-122/115
94.3%		170/154
90.6%
52.3/76.6
155/227
.607/.699
350 hp		213/193
90.6%
65.5/96
194/284
.57/.657
438 hp
475		243/216
88.9%
74.7/107
221/318
.521/.589
500 hp
542		261/222
85.1%
80.2/110
238/327
.466/.504
537 hp
583
655		266/221
83.1%
81.8/110
242/326
.407/.43
547 hp
594
668		---213/187
87.9%
1.37
.412/.324
Chevy 292 Ported Meaux Racing Heads Iron197/-2.055/1.60
4.00
Pipe		N/A-130/119
91.5%		186/166
89.2%
56.1/82.6
166/245
.658/.754
383 hp		228/213
93.4%
68.7/106
204/314
.605/.726
469 hp
509		258/245
95%
77.8/122
230/361
.547/.668
531 hp
576		271/256
94.5%
81.7/127
242/377
.479/.581
557 hp
605
680		280/257
91.8%
84.4/128
250/379
.424/.50
576 hp
625
703		---226/209
92.8%
1.42
.416/.324
Chevy 292 Ported Meaux Racing Heads Iron209.6/-2.055/1.60
4.00
Pipe		N/A-132/119
90.2%		188/163
86.7%
56.7/81.1
168/240
.665/.74
387 hp		233/207
88.8%
70.2/103
208/305
.618/.705
479 hp
520		263/237
90.1%
79.3/118
235/349
.558/.646
541 hp
587		274/251
91.6%
82.6/125
245/370
.484/.57
564 hp
612
688		285/262
91.9%
85.9/130
255/386
.432/.51
586 hp
636
715		---229/207
90.1%
-
.416/.324
Chevy 416 Iron165/591.84/1.5058-----------
-
-
.373/.304
Chevy 416 Bill Jones IronN/A1.72/1.50
-
No Pipe		N/A----179/127
70.9%
77/71.9
228/213
.454/.369
368 hp
400		------
-
-
.348/.304
Chevy 416 Mild Ported Bill Jones IronN/A1.72/1.50
-
No PIpe		N/A----197/172
87.3%
84.8/97.3
251/288
.499/.50
405 hp
440		------
-
-
.348/.304
Chevy 434 Weingartner Racing IronN/A2.02/1.60
4.125
No Pipe		N/A67/54
80.6%		126/104
82.5%		175/126
72%
54.6/62.7
162/186
.63/.572
360 hp		209/132
63.2%
65.2/65.7
193/195
.564/.45
430 hp
466		213/134
62.9%
66.5/66.6
197/197
.46/.365
438 hp
475		216/133
61.6%
67.4/66.1
200/196
.389/.302
444 hp
482
542		216/134
62%
67.4/66.6
200/197
.333/.261
444 hp
482
542		---193/127
66.1%
-
.409/.324
Chevy 441 Iron CHP155/621.94/1.50
-
No Pipe		7655/45
81.8%		110/80
72.7%		160/112
70%
54.1/63.4
160/188
.599/.543
329 hp		194/127
65.5%
65.6/71.9
194/213
.545/.461
399 hp
433		201/136
67.7%
68/77
201/228
.452/.395
413 hp
449		203/139
68.5%
68.7/78.7
203/233
.38/.337
418 hp
453
509		----174/119
68.4%
1.31/2.24
.393/.304
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy 441 Iron CHP155/621.94/1.50
-
Pipe		7655/45
81.8%		110/83
75.5%		160/118
73.8%
54.1/66.8
160/198
.599/.572
329 hp		194/133
68.6%
65.6/75.3
194/223
.545/.483
399 hp
433		201/146
72.6%
68/82.6
201/245
.452/.424
413 hp
449		203/148
72.9%
68.7/83.8
203/248
.38/.359
418 hp
453
509		----174/126
72.4%
1.31/2.39
.393/.304
Chevy 461 Weingartner Racing IronN/A2.02/1.60
4.125
No Pipe		N/A66/55
83.3%		131/108
82.4%		185/137
74.1%
57.7/68.1
171/202
.666/.622
381 hp		222/162
73%
69.3/80.6
205/239
.599/.552
457 hp
495		240/174
72.5%
74.9/86.5
222/256
.518/.474
494 hp
536		236/176
74.6%
73.6/87.5
218/259
.425/.40
485 hp
527
592		234/175
74.8%
73/87
216/258
.361/.341
481 hp
522
587		---208/155
74.7%
-
.409/.324
Chevy 461 Iron161/632.02/1.6064----216/137
63.4%
67.4/68.1
200/202
.466/.373
444 hp
482		------
-
1.34/2.17
.409/.324
Chevy 461 Ported IronN/A2.02/1.60
4.06		N/A94/65
69.1%		152/102
67.1%		183/126
68.9%
57.1/62.7
169/186
.658/.572
376 hp		210/147
70%
65.5/73.1
194/217
.567/.501
432 hp
469		224/162
72.3%
69.9/80.6
207/239
.484/.441
461 hp
500		232/172
74.1%
72.4/85.5
214/253
.417/.391
477 hp
518
582		238/180
75.6%
74.3/89.5
220/265
.367/.35
490 hp
531
597		---207/148
71.8%
-
.409/.324
Chevy 461 Ported Creative Flow Management IronN/A2.02/1.60
4.03
No Pipe		N/A79/61
77.2%		140/110
78.6%		189/160
84.7%
59/79.6
175/236
.68/.727
389 hp		231/188
81.4%
72.1/93.5
214/277
.623/.64
475 hp
516		262/203
77.5%
81.8/101
242/299
.566/.553
539 hp
585		274/212
77.4%
85.5/105
253/312
.493/.481
564 hp
612
688		263/213
81%
82.1/106
243/314
.406/.415
541 hp
587
660		---227/181
79.9%
-
.409/.324
Chevy 461 Ported SS (Oval) Iron165/652.02/1.60M/A-------260/200
76.9%
81.1/99.5
240/295
.351/.341
535 hp
580
653		---
-
1.58/3.08
.409/.324
Chevy 461X 3-angle valve job Meaux Racing Heads SF600 Iron173.5/-1.94/1.50
4.00
Pipe		N/A-100/88
88%		155/124
80%
52.4/70.2
155/208
.581/.601
319 hp		189/142
75.1%
63.9/80.4
189/238
.531/.516
389 hp
422		191/142
74.3%
64.6/80.4
191/238
.429/.413
393 hp
426		193/146
75.6%
65.3/82.6
193/245
.361/.354
397 hp
431
484		----166/128
77.5%
-
.393/.304
Chevy 461X C/ED Ported Meaux Racing Heads SF600 IronN/A2.055/1.60
4.00
Pipe		N/A-131/116
88.5%		188/153
81.4%
56.7/76.1
168/225
.665/.695
387 hp		230/194
84.3%
69.3/96.5
205/286
.61/.661
473 hp
513		260/212
81.5%
78.4/105
232/312
.552/.578
535 hp
580		273/245
89.7%
82.3/122
244/361
.483/.556
562 hp
609
685		282/253
89.7%
85/126
252/373
.427/.492
580 hp
629
708		---227/196
86%
-
.416/.324
Chevy 462 Iron CCM157/641.94/1.50
-
No Pipe		6250/54
108%		119/88
73.9%		167/116
69.5%
56.5/65.6
167/194
.626/.562
344 hp		198/128
64.6%
67/72.4
198/215
.556/.465
407 hp
442		212/134
63.2%
71.7/75.8
213/225
.476/.39
436 hp
473		218/137
62.8%
73.8/77.5
219/230
.408/.332
448 hp
487
547		----183/121
66%
1.39/2.14
.393/.304
Chevy 462 Iron CCM157/641.94/1.50
-
Pipe		6250/54
108%		119/91
76.5%		167/121
72.5%
56.5/68.5
167/203
.626/.586
344 hp		198/134
67.7%
67/75.8
198/225
.556/.487
407 hp
442		212/139
65.6%
71.7/78.7
213/233
.476/.404
436 hp
473		218/142
65.1%
73.8/80.4
219/238
.408/.344
448 hp
487
547		----183/125
68.6%
1.39/2.22
.393/.304
Chevy 462 Bill Jones IronN/A1.94/1.50
-
No Pipe		N/A58/50
86.2%		121/94
77.7%		169/124
73.4%
57.2/70.2
169/208
.633/.601
348 hp		192/131
68.2%
65/74.1
192/220
.539/.476
395 hp
429		197/135
68.5%
66.6/76.4
197/226
.443/.392
405 hp
440		206/137
66.5%
69.7/77.5
206/230
.386/.332
424 hp
460
517		----177/124
70.2%
-
.393/.304
Chevy 462 Kendrick AutoN/A2.02/1.60N/A84/56
66.7%		130/104
80%		166/125
75.3%
51.8/62.2
153/184
.597/.568
341 hp		196/136
69.4%
61.2/67.6
181/200
.529/.463
403 hp
437		214/141
65.9%
66.8/70.1
198/208
.462/.384
440 hp
478		215/144
67%
67.1/71.6
199/212
.387/.327
442 hp
480
540		----184/130
70.6%
-
.409/.324
Chevy 462 Pocket Ported Kendrick AutoN/A2.02/1.60N/A81/55
67.9%		127/109
85.8%		169/136
80.5%
52.7/67.6
156/200
.608/.618
348 hp		202/159
78.7%
63/79.1
187/234
.545/.542
416 hp
451		223/179
80.3%
69.6/89
206/264
.481/.488
459 hp
498		226/187
82.7%
70.5/93
209/276
.407/.425
465 hp
504
567		----189/154
81.3%
-
.409/.324
Chevy 492 Cast Heads Iron157/622.02/1.606469/57
82.6%		130/107
82.3%		173/125
72.3%
54/62.2
160/184
.622/.568
356 hp		198/137
69.2%
61.8/68.1
183/202
.534/.467
407 hp
442		206/141
68.4%
64.3/70.1
190/208
.445/.384
424 hp
460		209/141
67.5%
65.2/70.1
193/208
.376/.32
430 hp
466
525		209/141
67.5%
65.2/70.1
193/208
.322/.274
430 hp
466
525		---188/132
70.4%
1.33/2.27
.409/.324
Chevy 492 Ported Cast Heads IronN/A2.02/1.60N/A62/56
90.3%		129/109
84.5%		180/141
78.3%
56.2/70.1
166/208
.648/.64
370 hp		217/166
76.5%
67.7/82.6
201/245
.586/.565
446 hp
484		238/174
73.1%
74.3/86.5
220/256
.514/.474
490 hp
531		244/181
74.2%
76.1/90
226/267
.439/.411
502 hp
545
612		246/185
75.2%
76.8/92
227/273
.379/.36
506 hp
549
617		---209/159
76.2%
-
.409/.324
Chevy 492 Tri-Mark Iron161/-2.02/1.606469/57
82.6%		129/108
83.7%		172/124
72.1%
53.7/61.7
159/183
.619/.563
354 hp		196/141
71.9%
61.2/70.1
181/208
.529/.48
403 hp
437		207/142
68.6%
64.6/70.6
191/209
.447/.387
426 hp
462		210/143
68.1%
65.5/71.1
194/211
.378/.325
432 hp
469
527		----183/132
72%
1.30
.409/.324
Chevy 492 Ported Tri-Mark Stealth Iron169/-2.02/1.606468/58
85.3%		141/113
80.1%		192/145
75.5%
59.9/72.1
178/214
.691/.659
395 hp		218/162
74.3%
68/80.6
202/239
.588/.552
448 hp
487		234/167
71.4%
73/83.1
216/246
.505/.455
481 hp
522		240/170
70.8%
74.9/84.6
222/251
.432/.386
494 hp
536
602		----205/151
73.9%
1.42
.409/.324
Chevy 882 Iron CCM151/591.94/1.50
-
No Pipe		7670/58
82.9%		125/108
86.4%		175/135
77.1%
59.2/76.4
175/226
.656/.654
360 hp		204/141
69.1%
69/79.8
204/236
.573/.512
420 hp
455		205/142
69.3%
69.4/80.4
205/238
.461/.413
422 hp
458		206/142
68.9%
69.7/80.4
206/238
.386/.344
424 hp
460
517		----183/134
73%
1.36/2.41
.393/.304
Chevy 882 Iron CCM151/591.94/1.50
-
Pipe		7670/59
84.3%		125/109
87.2%		175/136
77.7%
59.2/77
175/228
.656/.659
360 hp		204/143
70.1%
69/80.9
204/240
.573/.52
420 hp
455		205/144
70.2%
69.4/81.5
205/241
.461/.419
422 hp
458		206/145
70.4%
69.7/82.1
206/243
.386/.351
424 hp
460
517		----183/135
74%
1.36/2.46
.393/.304
Chevy Fast Burn 4298 GM Alum202/782.00/1.556262/55
88.7%		136/104
76.5%		187/133
71.1%
59.5/70.5
176/209
.679/.624
385 hp		232/158
68.1%
73.8/83.7
219/248
.632/.556
477 hp
518		266/180
67.7%
84.7/95.4
251/283
.58/.506
547 hp
594		275/193
70.2%
87.5/102
259/303
.50/.452
566 hp
614
690		----219/154
70.1%
1.36/2.47
.405/.314
Chevy Fast Burn 4298 Bob202/782.00/1.55N/A-133/98
73.7%		183/129
70.5%
58.3/68.4
173/203
.665/.605
376 hp		225/150
66.7%
71.6/79.5
212/236
.613/.527
463 hp
502		254/171
67.3%
80.9/90.6
240/269
.554/.481
523 hp
567		244/179
73.4%
77.7/94.9
230/281
.443/.42
502 hp
545
612		248/184
74.2%
78.9/97.5
234/289
.386/.37
510 hp
554
622		---215/152
70.8%
1.26/2.36
.405/.314
Chevy Fast Burn Dr Js PerformanceN/A2.00/1.55N/A70/51
72.9%		136/101
74.3%		188/140
74.5%
59.8/74.2
177/220
.683/.656
387 hp		224/167
74.6%
71.3/88.5
211/262
.61/.587
461 hp
500		237/189
79.7%
75.4/100
224/297
.517/.532
488 hp
529		236/200
84.7%
75.1/106
223/314
.429/.469
485 hp
527
592		237/207
87.3%
75.4/110
224/325
.369/.416
488 hp
529
595		---210/167
79.8%
-
.405/.314
Chevy Fast Burn CNC Dr Js PerformanceN/A2.00/1.55N/A70/51
72.9%		138/101
73.2%		194/134
69.1%
61.8/71
183/210
.705/.628
399 hp		236/178
75.4%
75.1/94.3
223/280
.643/.626
485 hp
527		265/202
76.2%
84.4/107
250/317
.578/.568
545 hp
591		278/220
79.1%
88.5/117
262/345
.505/.516
572 hp
620
698		284/234
82.4%
90.4/124
268/367
.442/.47
584 hp
634
713		---233/178
76.6%
-
.405/.314
Chevy Fast Burn Harry CNC Alum215/762.00/1.556262/55
88.7%		136/104
76.5%		187/133
71.1%
59.5/70.5
176/209
.679/.624
385 hp		232/158
68.1%
73.8/83.7
219/248
.632/.556
477 hp
518		266/180
67.7%
84.7/95.4
251/283
.58/.506
547 hp
594		275/193
70.2%
87.5/102
259/303
.50/.452
566 hp
614
690		----219/154
70.1%
1.28/2.54
.405/.314
Chevy TurboN/A-N/A-----201/177
88.1%
-
413 hp
449
504		-----
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy L83 462624 Jonas158/-1.94/1.507644/41
93.2%		101/82
81.2%		155/125
80.6%
52.4/70.7
155/210
.581/.606
319 hp		182/137
75.3%
61.6/77.5
182/230
.511/.498
374 hp
406		196/140
71.4%
66.3/79.2
196/235
.441/.407
403 hp
437		-----159/121
76.3%
1.24
.393/.304
Chevy L98 113 Alum163/581.94/1.505862/-116/-161/-
54.5
161
.603
331 hp		185/-
62.6
185
.52
381 hp
413		195/-
66
195
.438
401 hp
435		198/-
67
198
.371
407 hp
442
497		----171
-
1.21
.393/.304
Chevy L98 113 Alum163/581.94/1.505862/53
85.5%		115/101
87.8%		159/134
84.3%
53.8/75.8
159/225
.596/.649
327 hp		189/157
83.1%
63.9/88.8
189/263
.531/.57
389 hp
422		190/171
90%
64.3/96.8
190/287
.427/.497
391 hp
424		-----163/141
86.2%
1.17/2.95
.393/.304
Chevy L98 Weingartner Racing AlumN/A1.94/1.50
4.125
No Pipe		N/A60/70
116%		114/108
94.7%		174/152
87.4%
58.9/86
174/255
.652/.736
358 hp		199/152
76.4%
67.3/86
199/255
.559/.552
409 hp
444		205/166
81%
69.4/93.9
205/278
.461/.483
422 hp
458		207/168
81.2%
70/95.1
207/282
.388/.407
426 hp
462
520		----180/149
83%
-
.393/.304
Chevy L98 113 Ported Precision Motorsports AlumN/A2.02/-N/A87/-144/-180/-
56.2
166
.648
370 hp		218/-
68
202
.588
448 hp
487		235/-
73.3
217
.507
483 hp
525		243/-
75.8
225
.437
500 hp
542
610		----204
-
-
.409
Chevy L98 113 CNC TPIS AlumN/A2.00/1.566055/40
72.7%		122/112
91.8%		193/154
79.8%
61.4/80.6
182/239
.701/.717
397 hp		242/181
74.8%
77/94.7
228/281
.66/.632
498 hp
540		270/197
73%
85.9/103
255/305
.589/.551
555 hp
603		262/205
78.2%
83.4/107
247/318
.476/.478
539 hp
585
658		----218/170
78%
-
.405/.316
Chevy L98 Alum163/581.94/1.5058-120/100
83.3%		163/129
79.1%
55.1/73
163/216
.611/.625
335 hp		189/148
78.3%
63.9/83.8
189/248
.531/.538
389 hp
422		199/164
82.4%
67.3/92.8
199/275
.447/.477
409 hp
444		199/167
83.9%
67.3/94.5
199/280
.373/.405
409 hp
444
499		----174/142
81.4%
1.22/2.88
.393/.304
Chevy L98 Alum163/581.94/1.50
-
No Pipe		N/A56/49
87.5%		120/96
80%		160/123
76.9%
54.1/69.6
160/206
.599/.596
329 hp		186/140
75.3%
62.9/79.2
186/235
.523/.509
383 hp
415		196/155
79.1%
66.3/87.7
196/260
.441/.451
403 hp
437		199/157
78.9%
67.3/88.8
199/263
.373/.38
409 hp
444
499		----172/134
77.9%
1.22/2.71
.393/.304
Chevy L98 Hutter Alum173/-1.94/1.5063-139/110
79.1%		190/145
76.3%
64.3/82.1
190/243
.712/.703
391 hp		229/175
76.4%
77.5/99
230/293
.643/.636
471 hp
511		243/190
78.2%
82.2/108
244/319
.546/.552
500 hp
542		246/196
79.7%
83.2/111
247/329
.461/.475
506 hp
549
617		----209/163
77.9%
1.42
.393/.304
Chevy L98 CNC Chapman Alum185/662.00/1.56
-
No Pipe		6261/52
85.2%		121/109
90.1%		172/149
86.6%
54.7/78
162/231
.625/.694
354 hp		216/182
84.3%
68.8/95.2
204/282
.589/.636
444 hp
482		252/192
76.2%
80.2/100
238/298
.549/.537
518 hp
562		-----190/158
83%
1.36/2.91
.405/.316
Chevy L98 Ported ET Performance Alum184/-2.00/1.55
4.03		62.567/52
77.6%		129/104
80.6%		187/146
78.1%
59.5/77.4
176/229
.679/.685
385 hp		228/175
76.8%
72.6/92.7
215/275
.621/.615
469 hp
509		242/188
77.7%
77/99.6
228/295
.528/.529
498 hp
540		247/193
78.1%
78.6/102
233/303
.449/.452
508 hp
551
620		----207/161
78%
1.34
.405/.314
Chevy L98 Ported Total Engine Flow AlumN/A-N/A67/53
79.1%		150/118
78.7%		226/173
76.5%
-
465 hp		287/219
76.3%
-
590 hp
641		332/247
74.4%
-
683 hp
741		353/264
74.8%
-
726 hp
788
886		368/266
72.3%
-
757 hp
821
924		---286/215
75%
Chevy Vortec Iron CHP170/-1.94/1.506566/57
86.4%		129/101
78.3%		186/136
73.1%
62.9/77
186/228
.697/.659
383 hp		219/149
68%
74.1/84.3
220/250
.615/.541
451 hp
489		216/155
71.8%
73.1/87.7
217/260
.485/.451
444 hp
482		-----188/135
72.1%
1.29
.393/.304
Chevy Vortec 062 Weingartner Racing IronN/A1.94/1.50
4.125
No Pipe		N/A73/61
83.6%		144/113
78.5%		202/145
71.8%
68.3/82.1
202/243
.757/.703
416 hp		236/158
66.9%
79.8/89.4
237/265
.663/.574
485 hp
527		233/162
69.5%
78.8/91.7
234/272
.524/.471
479 hp
520		233/165
70.8%
78.8/93.4
234/277
.436/.40
479 hp
520
585		----210/149
70.9%
-
.393/.304
Chevy Vortec 906 Weingartner Racing IronN/A1.94/1.50
4.125
No Pipe		N/A76/54
71.1%		137/106
77.4%		199/139
69.8%
67.3/78.7
199/233
.745/.673
409 hp		239/152
63.6%
80.9/86
240/255
.671/.552
492 hp
533		240/157
65.4%
81.2/88.8
241/263
.539/.456
494 hp
536		241/159
66%
81.5/90
242/267
.451/.385
496 hp
538
605		----211/143
67.5%
-
.393/.304
Chevy Vortec 906 Meaux Racing SF600 Iron170/-1.94/1.50
4.00		N/A-121/98
81%		179/124
69.3%
60.6/70.2
179/208
.671/.601
368 hp		219/137
62.6%
74.1/77.5
220/230
.615/.498
451 hp
489		221/146
66.1%
74.8/82.6
222/245
.497/.424
455 hp
493		-----185/126
68.2%
1.30
.393/.304
Chevy Vortec 906 Meaux Racing 3 Angle VJ and clean up SF600 Iron170/-1.94/1.50
4.00		N/A-134/107
79.9%		187/142
75.9%
63.3/80.4
187/238
.701/.688
385 hp		223/157
70.4%
75.4/88.8
224/263
.627/.57
459 hp
498		221/163
73.8%
74.8/92.2
222/273
.497/.474
455 hp
493		-----191/142
74.4%
1.31
.393/.304
Chevy Vortec Scoggin-Dickey 170 Iron CHPN/A1.94/1.506357/40
70.2%		123/100
81.3%		174/139
79.9%
58.9/78.7
174/233
.652/.673
358 hp		212/153
72.2%
71.7/86.6
213/257
.596/.556
436 hp
473		210/160
76.2%
71/90.5
211/268
.472/.465
432 hp
469		207/162
78.3%
70/91.7
207/272
.388/.392
426 hp
462
520		----185/143
77.1%
-
.393/.304
Chevy Vortec Scoggin-Dickey 180 Iron CHP180/-2.00/1.556571/53
74.6%		139/102
73.4%		182/131
72%
57.9/69.4
172/206
.661/.614
374 hp		224/146
65.2%
71.3/77.4
211/229
.61/.513
461 hp
500		248/161
64.9%
78.9/85.3
234/253
.541/.453
510 hp
554		240/165
68.8%
76.4/87.4
226/259
.436/.387
494 hp
536
602		----207/141
68.2%
1.38
.405/.314
Chevy Vortec L30 059N/A1.84/1.50N/A68/47
69.1%		128/103
80.5%		179/138
77.1%
67.3/78.1
199/231
.707/.669
368 hp		205/152
74.1%
77.1/86
228/255
.607/.552
422 hp
458		221/163
73.8%
83.1/92.2
246/273
.524/.474
455 hp
493		-----183/139
75.9%
-
.373/.304
Chevy Vortec L31 Iron170/611.94/1.506458/43
74.1%		114/88
77.2%		173/125
72.3%
58.5/70.7
173/210
.648/.606
356 hp		216/143
66.2%
73.1/80.9
217/240
.607/.52
444 hp
482		225/149
66.2%
76.1/84.3
226/250
.506/.433
463 hp
502		222/152
68.5%
75.1/86
223/255
.416/.368
457 hp
495
557		----190/131
69.2%
1.32/2.49
.393/.304
Chevy Vortec L31 885 Iron CCM170/611.94/1.50
-
No Pipe		6470/48
68.6%		138/101
73.2%		190/129
67.9%
64.3/73
190/216
.712/.625
391 hp		227/140
61.7%
76.8/79.2
228/235
.638/.509
467 hp
507		239/147
61.5%
80.9/83.2
240/246
.537/.427
492 hp
533		229/151
65.9%
77.5/85.4
230/253
.429/.366
471 hp
511
575		----205/134
65.3%
1.41/2.48
.393/.304
Chevy Vortec L31 885 Iron CCM170/611.94/1.50
-
Pipe		6470/49
70%		139/105
75.5%		190/137
72.1%
64.3/77.5
190/230
.712/.664
391 hp		227/151
66.5%
76.8/85.4
228/253
.638/.549
467 hp
507		239/160
66.9%
80.9/90.5
240/268
.537/.465
492 hp
533		229/162
70.7%
77.5/91.7
230/272
.429/.392
471 hp
511
575		----205/143
69.8%
1.41/2.66
.393/.304
Chevy Vortec L31 885 Ported Iron CHPN/A1.94/1.50N/A60/50
83.3%		128/101
78.9%		193/162
83.9%
65.3/91.7
193/272
.723/.785
397 hp		224/181
80.8%
75.8/102
225/303
.629/.658
461 hp
500		239/181
75.7%
80.9/102
240/303
.537/.526
492 hp
533		-----196/156
79.7%
-
.393/.304
Chevy Vortec L31 Tri-Mark Iron168/-1.94/1.506467/51
76.1%		129/98
76%		183/133
72.7%
61.9/75.3
183/223
.686/.644
376 hp		218/146
67%
73.8/82.6
219/245
.612/.531
448 hp
487		217/151
69.6%
73.4/85.4
218/253
.488/.439
446 hp
484		216/152
70.4%
73.1/86
217/255
.405/.368
444 hp
482
542		----193/136
70.6%
1.30
.393/.304
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy Vortec L31 Tri-Mark Ported Stealth Iron173/-1.94/1.50N/A68/58
85.3%		134/117
87.3%		192/145
75.5%
65/82.1
192/243
.719/.703
395 hp		224/146
65.2%
75.8/82.6
225/245
.629/.531
461 hp
500		232/170
73.3%
78.5/96.2
233/285
.521/.494
477 hp
518		238/171
71.8%
80.5/96.8
239/287
.446/.414
490 hp
531
597		----204/150
73.4%
1.38
.393/.304
Chevy Vortec L31 Tri-Mark Ported Super Stealth Iron184/-1.94/1.50N/A67/60
89.6%		142/115
81%		198/155
78.3%
67/87.7
198/260
.742/.751
407 hp		236/170
72%
79.8/96.2
237/285
.663/.618
485 hp
527		246/175
71.1%
83.2/99
247/293
.553/.509
506 hp
549		251/181
72.1%
84.9/102
252/303
.47/.438
516 hp
560
630		----215/159
74.2%
1.36
.393/.304
Chevy Vortec Ported McCoyN/A-N/A----266/200
75.2%
-
547 hp
594		------
Chevy Vortec / Bow Tie 421 Small Port Iron175/652.00/1.5565---225/152
67.6%
71.6/80.6
212/239
.613/.535
463 hp
502		235/161
68.5%
74.8/85.3
222/253
.512/.453
483 hp
525		236/163
69.1%
75.1/86.4
223/256
.429/.382
485 hp
527
592		----232/159
68.4%
1.35/2.51
.405/.314
Chevy Vortec / Bow Tie 431 Large Port Iron206/772.00/1.5565-----268/164
61.2%
85.3/86.9
253/258
.487/.384
551 hp
598
673		-----
-
1.30/2.13
.405/.314
Chevy Vortec / Bow Tie Small Port Bob Iron175/642.00/1.55N/A67/53
79.1%		136/100
73.5%		182/128
70.3%
57.9/67.8
172/201
.661/.60
374 hp		223/145
65%
71/76.8
210/228
.608/.51
459 hp
498		251/152
60.6%
79.9/80.6
237/239
.547/.428
516 hp
560		240/164
68.3%
76.4/86.9
226/258
.436/.384
494 hp
536
602		240/166
69.2%
76.4/88
226/261
.374/.334
494 hp
536
602		---212/143
67.2%
1.43/2.59
.405/.314
Chevy Vortec / Bow Tie Large Port Bob Iron206/772.00/1.55N/A63/50
79.4%		133/100
75.2%		182/134
73.6%
57.9/71
172/210
.661/.628
374 hp		228/154
67.5%
72.6/81.6
215/242
.621/.542
469 hp
509		258/168
65.1%
82.1/89
243/264
.562/.473
531 hp
576		255/168
65.9%
81.2/89
241/264
.463/.394
525 hp
569
640		261/169
64.8%
83.1/89.6
246/265
.406/.34
537 hp
583
655		---220/149
67.8%
1.27/2.19
.405/.314
Chevy Vortec / Bow Tie Large Port Iron215/842.00/1.5566-----------
-
-
.405/.314
Chevy 364 18 Deg 248 RCR Super Truck Alum248/-2.14/1.6058-147/100
68%		231/167
72.3%
64.2/83.1
190/246
.784/.759
475 hp		287/205
71.4%
79.8/102
236/302
.731/.698
590 hp
641		324/237
73.1%
90.1/118
267/349
.66/.646
667 hp
723		338/251
74.3%
94/125
278/370
.574/.57
695 hp
754
848		343/257
74.9%
95.4/128
283/379
.499/.50
706 hp
766
861		---278/203
72.9%
1.38
.433/.324
Chevy 580 18 Deg 245 RCR Super Truck Alum245/-2.15/1.62554/65-148/124
83.8%		223/180
80.7%
61.4/86.8
182/257
.754/.805
459 hp		281/223
79.4%
77.4/108
229/319
.712/.748
578 hp
627		325/238
73.2%
89.5/115
265/340
.659/.639
669 hp
725		343/244
71.1%
94.5/118
280/349
.58/.546
706 hp
766
861		346/247
71.4%
95.3/119
282/353
.501/.473
712 hp
772
868		---278/209
75.4%
1.41
.435/.329
Chevy 364 / 580 18 Deg 236 CNC Chapman Alum236/-2.135/1.625
-
No Pipe		52/6571/54
76.1%		159/108
67.9%		224/182
81.3%
62.6/87.8
185/260
.762/.814
461 hp		273/222
81.3%
76.3/107
226/317
.697/.745
562 hp
609		305/238
78%
85.2/115
252/340
.623/.639
627 hp
681		314/250
79.6%
87.7/121
260/357
.534/.559
646 hp
701
788		323/260
80.5%
90.2/125
267/371
.471/.498
664 hp
721
811		---266/210
78.8%
1.37
.432/.329
Chevy 364 / 580 18 Deg 246 CNC Chapman Alum246/-2.15/1.625
-
No Pipe		52/6568/52
76.5%		159/112
70.4%		227/175
77.1%
62.5/84.4
185/250
.767/.783
467 hp		281/218
77.6%
77.4/105
229/311
.712/.731
578 hp
627		319/235
73.7%
87.9/113
260/336
.647/.631
656 hp
712		333/247
74.2%
91.7/119
272/353
.563/.552
685 hp
743
836		342/255
74.6%
94.2/123
279/364
.495/.489
704 hp
763
858		---277/207
74.8%
1.39
.435/.329
Chevy 364 / 580 18 Deg 256 CNC Chapman Alum256/-2.18/1.625
-
No Pipe		52/6672/54
75%		161/108
67.1%		233/182
78.1%
62.4/87.8
185/260
.777/.814
479 hp		286/222
77.6%
76.6/107
227/317
.715/.745
588 hp
638		321/238
74.1%
86/115
255/340
.642/.639
660 hp
716		344/250
72.7%
92.2/121
273/357
.573/.559
708 hp
768
863		348/260
74.7%
93.2/125
276/371
.497/.498
716 hp
777
873		---282/210
74.4%
1.36
.441/.329
Chevy 364 / 580 18 Deg 266 CNC Chapman Alum266/-2.18/1.625
-
No Pipe		52/6671/51
71.8%		151/114
75.5%		226/180
79.6%
60.5/86.8
179/257
.753/.805
465 hp		271/213
78.6%
72.6/103
215/304
.678/.714
557 hp
605		323/240
74.3%
86.5/116
256/343
.646/.644
664 hp
721		353/248
70.3%
94.6/120
280/354
.588/.555
726 hp
788
886		358/255
71.2%
95.9/123
284/364
.511/.489
736 hp
799
899		363/260
71.6%
97.3/125
288/371
.454/.436
747 hp
810
911		--292/216
73.8%
1.36
.441/.329
Chevy 364 / 580 18 Deg 249 Ported Hutter Alum249/-2.15/1.62553/64-151/117
77.5%		232/163
70.3%
63.9/78.6
189/233
.784/.729
477 hp		293/224
76.5%
80.7/108
239/320
.743/.751
603 hp
654		322/244
75.8%
88.7/118
263/349
.653/.655
662 hp
719		343/254
74.1%
94.5/122
280/363
.58/.568
706 hp
766
861		347/261
75.2%
95.6/126
283/373
.503/.50
714 hp
774
871		---281/211
74.8%
1.39
.435/.329
Chevy 18 Deg Ported ET Performance Alum257/-2.15/1.60
4.03		N/A74/49
66.2%		159/114
71.7%		231/177
76.6%
63.6/88
189/261
.781/.804
475 hp		288/219
76%
79.3/109
235/323
.73/.746
592 hp
643		323/238
73.7%
89/118
264/351
.655/.649
664 hp
721		341/246
72.1%
93.9/122
278/363
.576/.559
701 hp
761
856		----268/199
74.1%
1.33
.435/.324
Chevy 18 Deg 247RS CNC Chapman Alum247/1052.15/1.625
-
No Pipe		47.572/51
70.8%		157/114
72.6%		228/180
78.9%
62.8/86.8
186/257
.771/.805
469 hp		278/213
76.6%
76.6/103
227/304
.705/.714
572 hp
620		317/240
75.7%
87.3/116
259/343
.643/.644
652 hp
708		338/248
73.4%
93.1/120
276/354
.571/.555
695 hp
754
848		342/255
74.6%
94.2/123
279/364
.495/.489
704 hp
763
858		346/260
75.1%
95.3/125
282/371
.439/.436
712 hp
772
868		--287/216
75.3%
1.40/2.48
.435/.329
Chevy 18 Deg 255RS CNC Chapman Alum255/1052.18/1.625
-
No Pipe		47.571/51
71.8%		150/114
76%		226/180
79.6%
60.5/86.8
179/257
.753/.805
465 hp		277/213
76.9%
74.2/103
220/304
.693/.714
570 hp
618		323/240
74.3%
86.5/116
256/343
.646/.644
664 hp
721		347/248
71.5%
93/120
275/354
.578/.555
714 hp
774
871		351/255
72.6%
94/123
279/364
.501/.489
722 hp
783
881		354/260
73.4%
94.8/125
281/371
.443/.436
728 hp
790
888		--290/216
74.5%
1.39/2.48
.441/.329
Chevy 18 Deg 270RS CNC Chapman Alum270/1052.18/1.625
-
No Pipe		47.571/51
71.8%		151/114
75.5%		226/180
79.6%
60.5/86.8
179/257
.753/.805
465 hp		271/213
78.6%
72.6/103
215/304
.678/.714
557 hp
605		323/240
74.3%
86.5/116
256/343
.646/.644
664 hp
721		353/248
70.3%
94.6/120
280/354
.588/.555
726 hp
788
886		358/255
71.2%
95.9/123
284/364
.511/.489
736 hp
799
899		363/260
71.6%
97.3/125
288/371
.454/.436
747 hp
810
911		--292/216
73.8%
1.34/2.48
.441/.329
Chevy 18 Deg 235 CNC M2 Race Systems Alum235/-2.15/1.625
4.03		48--219/182
83.1%
60.3/87.8
179/260
.74/.814
451 hp		277/238
85.9%
76.3/115
226/340
.702/.798
570 hp
618		320/254
79.4%
88.1/122
261/363
.649/.682
658 hp
714		340/262
77.1%
93.7/126
277/374
.575/.586
699 hp
759
853		337/268
79.5%
92.8/129
275/383
.488/.514
693 hp
752
846		---299/241
80.6%
1.45
.435/.329
Chevy 18 Deg 255 CNC M2 Race Systems Alum255/-2.18/1.625
4.03		48--220/182
82.7%
58.9/87.8
175/260
.733/.814
453 hp		279/238
85.3%
74.7/115
221/340
.698/.798
574 hp
623		320/254
79.4%
85.7/122
254/363
.64/.682
658 hp
714		351/262
74.6%
94/126
279/374
.585/.586
722 hp
783
881		360/268
74.4%
96.4/129
286/383
.514/.514
741 hp
803
904		---306/241
78.7%
1.41
.441/.329
Chevy 18 Deg 270 CNC M2 Race Systems Alum270/-2.18/1.625
4.03		52--211/172
81.5%
56.5/82.9
167/246
.703/.769
434 hp		272/213
78.3%
72.9/103
216/304
.68/.714
560 hp
607		315/236
74.9%
84.4/114
250/337
.63/.633
648 hp
703		352/247
70.2%
94.3/119
279/353
.587/.552
724 hp
786
883		375/254
67.7%
100/122
298/363
.536/.487
771 hp
837
941		381/262
68.8%
102/126
302/374
.476/.439
784 hp
850
956		--318/231
72.6%
1.41
.441/.329
Chevy 18 Deg CNC AlumN/A2.20/1.625N/A72/55
76.4%		151/111
73.5%		220/158
71.8%
57.9/76.2
171/226
.727/.707
453 hp		275/218
79.3%
72.3/105
214/311
.681/.731
566 hp
614		317/237
74.8%
83.4/114
247/339
.628/.636
652 hp
708		353/250
70.8%
92.9/121
275/357
.583/.559
726 hp
788
886		367/256
69.8%
96.5/123
286/366
.52/.491
755 hp
819
921		371/262
70.6%
97.6/126
289/374
.46/.439
763 hp
828
931		--293/213
72.6%
-
.446/.329
Chevy 15 Deg CNC AlumN/A2.15/1.625N/A72/53
73.6%		154/111
72.1%		227/152
67%
62.5/73.3
185/217
.767/.68
467 hp		227/209
92.1%
62.5/101
185/299
.575/.701
467 hp
507		326/240
73.6%
89.8/116
266/343
.661/.644
671 hp
728		349/253
72.5%
96.1/122
285/361
.59/.566
718 hp
779
876		353/259
73.4%
97.2/125
288/370
.511/.496
726 hp
788
886		358/262
73.2%
98.6/126
292/374
.454/.439
736 hp
799
899		--285/212
74.5%
-
.435/.329
Chevy 15 Deg CNC M2 Race Systems245/-2.18/1.625
4.03		50-----------
-
-
.441/.329
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy 615x 15 Deg 261 CNC Chapman Alum261/1002.18/1.625
-
No Pipe		5869/52
75.4%		149/110
73.8%		215/173
80.5%
57.6/83.4
171/247
.717/.774
442 hp		278/215
77.3%
74.5/104
221/307
.695/.721
572 hp
620		329/236
71.7%
88.1/114
261/337
.658/.633
677 hp
734		363/249
68.6%
97.3/120
288/356
.605/.557
747 hp
810
911		379/258
68.1%
102/124
301/369
.541/.494
780 hp
846
951		391/261
66.8%
105/126
310/373
.489/.438
804 hp
873
981		--301/215
71.4%
1.50/2.61
.441/.329
Chevy 615 15 Deg CNC Rons Porting Service AlumN/A-N/A-158/119
75.3%		227/170
74.9%
-
467 hp		287/214
74.6%
-
590 hp
641		335/245
73.1%
-
689 hp
748		360/260
72.2%
-
741 hp
803
904		366/270
73.8%
-
753 hp
817
919		372/274
73.7%
-
765 hp
830
934		--301/222
73.7%
Chevy 15X 15 Deg 246 CNC Slawko Alum246/1022.15/1.6032-------348/265
76.1%
95.9/132
284/391
.441/.451
716 hp
777
873		350/267
76.3%
96.4/133
286/393
.394/.404
720 hp
781
878		-349/266
76.2%
1.42/2.62
.435/.324
Chevy / GM Splayed Valve 12 Deg MBE PortN/A2.23/1.55
4.155
No Pipe		N/A-140/102
72.9%		221/150
67.9%
56.6/79.5
168/236
.72/.703
455 hp		294/186
63.3%
75.3/98.6
223/292
.719/.654
605 hp
656		354/232
65.5%
90.6/123
269/364
.692/.653
728 hp
790		398/266
66.8%
102/141
302/418
.649/.624
819 hp
888
999		414/273
65.9%
106/145
314/429
.578/.549
852 hp
924
1039		415/280
67.5%
106/148
315/440
.507/.492
854 hp
926
1042		425/278
65.4%
109/147
322/437
.462/.434
874 hp
949
1067		427/-
109
324
.417
878 hp
953
1072		343/221
-
-
.452/.314
Chevy / GM Splayed Valve 10 Deg MBE PortN/A-
-
No Pipe		N/A---------436/-
-
897 hp
973
1094		-
Chevy 517 Canted Valve CNC Chapman Alum294/-2.18/1.625
-
No Pipe		4871/54
76.1%		157/114
72.6%		236/179
75.8%
63.2/86.3
187/256
.787/.801
485 hp		299/224
74.9%
80.1/108
237/320
.748/.751
615 hp
667		331/239
72.2%
88.7/115
263/341
.662/.641
681 hp
739		355/249
70.1%
95.1/120
282/356
.592/.557
730 hp
792
891		371/255
68.7%
99.4/123
295/364
.53/.489
763 hp
828
931		375/258
68.8%
100/124
298/369
.469/.433
771 hp
837
941		--303/217
71.5%
1.28
.441/.329
Chevy Canted Valve Ported ET Performance Alum285/-2.185/1.625
4.155		35-7264/47
73.4%		148/100
67.6%		228/142
62.3%
60.8/68.5
180/203
.758/.635
469 hp		318/183
57.5%
84.8/88.2
251/261
.793/.614
654 hp
710		375/214
57.1%
100/103
296/306
.748/.574
771 hp
837		402/237
59%
107/114
318/339
.669/.53
827 hp
897
1009		414/250
60.4%
110/121
327/357
.59/.479
852 hp
924
1039		419/258
61.6%
112/124
331/369
.523/.433
862 hp
935
1052		422/263
62.3%
113/127
333/376
.468/.392
868 hp
942
1059		-341/206
60.4%
1.48
.442/.329
Chevy Canted Valve Ported Meaux Racing SF600 AlumN/A2.20/1.55
4.125
No Pipe		N/A-140/99
70.7%		213/150
70.4%
56/79.5
166/236
.704/.703
438 hp		287/192
66.9%
75.5/102
224/301
.711/.675
590 hp
641		335/228
68.1%
88.1/121
261/358
.664/.641
689 hp
748		370/250
67.6%
97.3/132
288/393
.611/.586
761 hp
826
929		387/261
67.4%
102/138
302/410
.548/.524
796 hp
864
971		398/267
67.1%
105/142
310/419
.493/.469
819 hp
888
999		--304/207
67.9%
-
.446/.314
Chevy / GM SB2.2 011 278 Ported GPTech Busch Alum278/-2.17/1.62548-152/104
68.4%		235/164
69.8%
63.5/79.1
188/234
.787/.733
483 hp		300/202
67.3%
81.1/97.4
240/289
.754/.678
617 hp
670		348/233
67%
94.1/112
279/333
.699/.625
716 hp
777		379/249
65.7%
102/120
304/356
.635/.557
780 hp
846
951		373/258
69.2%
101/124
299/369
.535/.494
767 hp
833
936		---298/202
67.7%
1.36
.439/.329
Chevy / GM SB2.2 011 282 Ported GPTech Alum282/-2.18/1.62546-141/97
68.8%		226/147
65%
60.5/70.9
179/210
.753/.657
465 hp		302/188
62.3%
80.9/90.6
240/269
.755/.631
621 hp
674		355/224
63.1%
95.1/108
282/320
.71/.601
730 hp
792		384/252
65.6%
103/122
305/360
.64/.563
790 hp
857
964		390/260
66.7%
104/125
310/371
.557/.498
802 hp
870
979		---300/195
65%
1.38
.441/.329
Chevy / GM SB2.2 011 275 Ported Neal Alum275/-2.15/1.6054-148/109
73.6%		235/148
63%
64.7/73.6
192/218
.794/.672
483 hp		292/200
68.5%
80.4/99.5
238/295
.74/.681
601 hp
652		335/221
66%
92.3/110
273/326
.679/.602
689 hp
748		351/238
67.8%
96.7/118
286/351
.593/.541
722 hp
783
881		356/253
71.1%
98.1/126
291/373
.516/.492
732 hp
795
894		---286/195
68.1%
1.29
.435/.324
Chevy / GM SB2.2 011 282 Ported Neal Alum282/-2.15/1.62554-136/104
76.5%		217/139
64.1%
59.8/67
177/199
.733/.622
446 hp		288/180
62.5%
79.3/86.8
235/257
.73/.604
592 hp
643		335/219
65.4%
92.3/106
273/313
.679/.588
689 hp
748		352/237
67.3%
97/114
287/339
.595/.53
724 hp
786
883		352/246
69.9%
97/119
287/351
.51/.471
724 hp
786
883		---280/188
67%
1.25
.435/.329
Chevy / GM SB2.2 011 287 Ported Neal Alum287/-2.17/1.6056-143/95
66.4%		222/137
61.7%
60/68.1
178/202
.743/.622
457 hp		293/180
61.4%
79.2/89.5
235/265
.736/.613
603 hp
654		340/213
62.6%
91.9/106
272/314
.683/.58
699 hp
759		374/230
61.5%
101/114
300/339
.626/.522
769 hp
835
939		388/243
62.6%
105/121
311/358
.557/.473
798 hp
866
974		---293/183
62.4%
1.35
.439/.324
Chevy / GM SB2.2 Ported ET Performance AlumN/A2.215/1.60
4.155		N/A76/56
73.7%		151/114
75.5%		229/169
73.8%
59.4/84.1
176/249
.751/.768
471 hp		300/214
71.3%
77.9/106
231/315
.738/.729
617 hp
670		363/240
66.1%
94.2/119
279/354
.715/.654
747 hp
810		390/250
64.1%
101/124
300/368
.64/.568
802 hp
870
979		397/254
64%
103/126
305/374
.558/.494
817 hp
886
996		400/255
63.8%
104/127
308/376
.492/.434
823 hp
893
1004		--319/214
67.1%
-
.449/.324
Chevy / GM SB2.2 267 CNC Chapman Alum267/-2.17/1.625
-
No Pipe		5770/52
74.3%		159/112
70.4%		238/171
71.8%
64.4/82.5
191/244
.797/.765
490 hp		301/207
68.8%
81.4/99.8
241/296
.756/.694
619 hp
672		347/233
67.1%
93.8/112
278/333
.697/.625
714 hp
774		367/249
67.8%
99.2/120
294/356
.615/.557
755 hp
819
921		369/259
70.2%
99.8/125
296/370
.53/.496
759 hp
824
926		373/262
70.2%
101/126
299/374
.468/.439
767 hp
833
936		--308/213
69.3%
1.40
.439/.329
Chevy / GM SB2.2 292 CNC Chapman Alum292/-2.17/1.625
-
No Pipe		5765/52
80%		145/113
77.9%		236/173
73.3%
63.8/83.4
189/247
.79/.774
485 hp		307/207
67.4%
83/99.8
246/296
.771/.694
632 hp
685		367/233
63.5%
99.2/112
294/333
.737/.625
755 hp
819		385/249
64.7%
104/120
308/356
.645/.557
792 hp
859
966		389/259
66.6%
105/125
312/370
.558/.496
800 hp
868
976		391/262
67%
106/126
313/374
.491/.439
804 hp
873
981		--317/214
67.4%
1.34
.439/.329
Chevy / GM SB2.2 Drag MBE Port 1 Alum312/-2.19/1.59
4.15
No Pipe		N/A70/45
64.3%		156/101
64.7%		240/139
57.9%
63.7/70
189/207
.796/.635
494 hp		320/188
58.8%
85/94.7
252/281
.796/.644
658 hp
714		377/230
61%
100/116
297/343
.751/.631
776 hp
841		413/255
61.7%
110/128
325/381
.685/.583
850 hp
922
1037		426/266
62.4%
113/134
335/397
.606/.521
876 hp
951
1069		439/272
62%
117/137
345/406
.546/.466
903 hp
980
1102		--339/207
61.2%
1.41
.443/.322
Chevy / GM SB2.2 Drag MBE Port 2 Alum312/-2.19/1.59N/A---------450/-
119
354
.448
926 hp
1004
1129		-
-
1.44
.443/.322
Chevy / GM SB2.2 Drag MBE Port 3 I-55 E-55 SF600 Alum312/-2.18/1.60
4.155
No Pipe		N/A61/50
82%		142/107
75.4%		224/145
64.7%
60/72.1
178/214
.747/.659
461 hp		305/191
62.6%
81.7/95
242/281
.763/.651
627 hp
681		364/230
63.2%
97.5/114
289/339
.728/.627
749 hp
812		406/257
63.3%
109/128
322/379
.677/.584
835 hp
906
1019		428/270
63.1%
115/134
340/398
.611/.526
880 hp
955
1074		437/278
63.6%
117/138
347/410
.546/.474
899 hp
975
1097		442/283
64%
118/141
351/417
.491/.428
909 hp
987
1109		-344/220
64.1%
1.42
.441/.324
Chevy / GM SB2.2 Hendricks - Meaux Racing SF600 AlumN/A2.20/1.60
4.125
No Pipe		N/A-142/107
75.4%		219/146
66.7%
57.6/72.6
171/215
.723/.663
451 hp		289/184
63.7%
76/91.5
225/271
.716/.627
595 hp
645		337/211
62.6%
88.7/105
263/311
.668/.575
693 hp
752		355/252
71%
93.4/125
277/371
.586/.572
730 hp
792
891		356/263
73.9%
93.7/131
277/388
.504/.512
732 hp
795
894		398/267
67.1%
105/133
310/393
.493/.455
819 hp
888
999		--299/204
68.2%
-
.446/.324
Chevy / GM SB2.2 Hendricks - Darin Morgan SF600 AlumN/A2.18/1.60
-
No Pipe		N/A-132/90
68.2%		214/163
76.2%
57.3/81.1
170/240
.713/.74
440 hp		299/200
66.9%
80.1/99.5
237/295
.748/.681
615 hp
667		386/240
62.2%
103/119
306/354
.772/.654
794 hp
862		410/260
63.4%
110/129
325/383
.683/.59
843 hp
915
1029		425/273
64.2%
114/136
337/402
.607/.531
874 hp
949
1067		442/278
62.9%
118/138
351/410
.553/.474
909 hp
987
1109		449/282
62.8%
120/140
356/416
.499/.427
924 hp
1002
1127		451/287
63.6%
121/143
358/423
.451/.391
928 hp
1007
1132		356/230
64.6%
-
.441/.324
Chevy / GM SB2.2 DEI - Darin Morgan SF600 AlumN/A2.18/1.60
-
No Pipe		N/A-158/101
63.9%		231/142
61.5%
61.9/70.6
183/209
.77/.645
475 hp		310/180
58.1%
83.1/89.5
246/265
.775/.613
638 hp
692		365/212
58.1%
97.8/105
290/312
.73/.578
751 hp
815		392/244
62.2%
105/121
311/360
.653/.554
806 hp
875
984		397/263
66.2%
106/131
315/388
.567/.512
817 hp
886
996		404/269
66.6%
108/134
321/396
.505/.458
831 hp
902
1014		--322/202
62.5%
-
.441/.324
Chevy / GM SB2.2 CNC Race Flow Development AlumN/A2.20/1.58N/A64/61
95.3%		140/115
82.1%		228/159
69.7%
60/81.1
178/240
.753/.731
469 hp		312/198
63.5%
82.1/101
243/299
.773/.683
642 hp
696		368/229
62.2%
96.8/117
287/346
.729/.632
757 hp
821		402/253
62.9%
106/129
313/382
.664/.582
827 hp
897
1009		418/265
63.4%
110/135
326/400
.592/.522
860 hp
933
1049		429/276
64.3%
113/141
334/417
.531/.476
883 hp
957
1077		436/283
64.9%
115/144
340/428
.48/.434
897 hp
973
1094		-342/222
65.1%
-
.446/.320
Chevy / GM SB2.2 CNC Race Flow Development AlumN/A2.20/1.5836-156/109
69.9%		240/145
60.4%
63.1/74
187/219
.793/.667
494 hp		322/200
62.1%
84.7/102
251/302
.798/.69
662 hp
719		376/231
61.4%
98.9/118
293/349
.745/.638
773 hp
839		417/262
62.8%
110/134
325/396
.689/.603
858 hp
931
1047		422/273
64.7%
111/139
329/413
.597/.538
868 hp
942
1059		441/280
63.5%
116/143
344/423
.546/.483
907 hp
984
1107		453/282
62.3%
119/144
353/426
.499/.432
932 hp
1011
1137		-353/223
63%
-
.446/.320
Chevy / GM ROx 667 Weld Tech Alum288/-2.18/1.6150-147/119
81%		224/174
77.7%
60/85.5
178/253
.747/.785
461 hp		293/213
72.7%
78.5/105
233/310
.733/.721
603 hp
654		336/241
71.7%
90/118
267/351
.672/.653
691 hp
750		373/254
68.1%
99.9/125
296/370
.622/.573
767 hp
833
936		382/262
68.6%
102/129
303/381
.546/.507
786 hp
853
959		386/265
68.7%
103/130
306/386
.483/.449
794 hp
862
969		--306/218
71.4%
1.34
.441/.326
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy / GM RO7 - Darin Morgan SF600 AlumN/A2.18/-N/A-143/-220/-
58.9
175
.733
453 hp		307/-
82.2
244
.768
632 hp
685		372/-
99.7
295
.744
765 hp
830		408/-
109
324
.68
839 hp
911
1024		428/-
115
340
.611
880 hp
955
1074		446/-
119
354
.558
917 hp
995
1119		453/-
121
360
.503
932 hp
1011
1137		451/-
121
358
.451
928 hp
1007
1132		359
-
-
.441
AeroHead Iron CHP178/701.94/1.507360/48
80%		116/101
87.1%		162/141
87%
54.8/79.8
162/236
.607/.683
333 hp		219/171
78.1%
74.1/96.8
220/287
.615/.621
451 hp
489		225/185
82.2%
76.1/105
226/310
.506/.538
463 hp
502		226/188
83.2%
76.5/106
227/315
.423/.455
465 hp
504
567		----190/157
82.9%
1.27/2.69
.393/.304
AFR 180 Street Old SF600 Alum180/-2.02/1.60
4.06
1 3/4" Pipe		68-74-129/108
83.7%		195/156
80%
60.8/77.6
180/230
.702/.709
401 hp		240/178
74.2%
74.9/88.5
222/262
.648/.606
494 hp
536		255/190
74.5%
79.6/94.5
236/280
.55/.518
525 hp
569		260/194
74.6%
81.1/96.5
240/286
.468/.441
535 hp
580
653		----216/165
76.6%
1.44
.409/.324
AFR 180 Comp Old SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe		74-144/102
70.8%		206/152
73.8%
64.3/75.6
190/224
.741/.69
424 hp		245/190
77.6%
76.4/94.5
227/280
.661/.647
504 hp
547		260/204
78.5%
81.1/101
240/301
.561/.556
535 hp
580		268/211
78.7%
83.6/105
248/311
.482/.479
551 hp
598
673		----225/172
76.5%
-
.409/.324
AFR 180 Street SF600 Alum180/-2.02/1.60
4.06
1 3/4" Pipe		68-74-138/110
79.7%		198/158
79.8%
61.8/78.6
183/233
.712/.718
407 hp		240/190
79.2%
74.9/94.5
222/280
.648/.647
494 hp
536		260/207
79.6%
81.1/103
240/305
.561/.564
535 hp
580		-----209/166
79.5%
1.44
.409/.324
AFR 180 Comp SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe		74-142/115
81%		203/165
81.3%
63.3/82.1
188/243
.73/.749
418 hp		247/200
81%
77.1/99.5
228/295
.666/.681
508 hp
551		270/217
80.4%
84.3/108
250/320
.583/.591
555 hp
603		-----216/174
80.9%
-
.409/.324
AFR 190 Alum CCMN/A2.02/1.60N/A71/67
94.4%		144/121
84%		208/157
75.5%
64.9/78.1
192/231
.748/.713
428 hp		244/188
77%
76.1/93.5
226/277
.658/.64
502 hp
545		262/202
77.1%
81.8/100
242/298
.566/.551
539 hp
585		261/211
80.8%
81.4/105
241/311
.469/.479
537 hp
583
655		----224/176
78.6%
-
.409/.324
AFR 190 Street SF600 Alum190/642.02/1.60
-
No Pipe		68-74-129/108
83.7%		195/156
80%
60.8/77.6
180/230
.702/.709
401 hp		240/178
74.2%
74.9/88.5
222/262
.648/.606
494 hp
536		260/190
73.1%
81.1/94.5
240/280
.561/.518
535 hp
580		262/194
74%
81.8/96.5
242/286
.471/.441
539 hp
585
658		----217/165
76.1%
1.38/3.03
.409/.324
AFR 190 Comp SF600 AlumN/A2.02/1.6074-135/110
81.5%		201/157
78.1%
62.7/78.1
186/231
.723/.713
413 hp		243/180
74.1%
75.8/89.5
225/265
.656/.613
500 hp
542		264/195
73.9%
82.4/97
244/287
.57/.531
543 hp
589		276/208
75.4%
86.1/103
255/307
.496/.472
568 hp
616
693		----224/170
76%
-
.409/.324
AFR 195 OLD Out of Box Weingartner Racing Alum195/-2.02/1.60
4.125
No Pipe		N/A73/53
72.6%		146/108
74%		210/150
71.4%
65.5/74.6
194/221
.756/.681
432 hp		258/176
68.2%
80.5/87.5
239/259
.696/.60
531 hp
576		279/186
66.7%
87.1/92.5
258/274
.602/.507
574 hp
623		273/191
70%
85.2/95
252/281
.491/.434
562 hp
609
685		275/192
69.8%
85.8/95.5
254/283
.424/.374
566 hp
614
690		279/193
69.2%
87.1/96
258/284
.376/.329
574 hp
623
700		--246/171
69.5%
1.43
.409/.324
AFR 195 Street SF600 Alum195/642.02/1.60
4.06
1 3/4" Pipe		68-74-132/108
81.8%		198/156
78.8%
61.8/77.6
183/230
.712/.709
407 hp		240/178
74.2%
74.9/88.5
222/262
.648/.606
494 hp
536		260/190
73.1%
81.1/94.5
240/280
.561/.518
535 hp
580		262/194
74%
81.8/96.5
242/286
.471/.441
539 hp
585
658		----218/165
75.6%
1.34/3.03
.409/.324
AFR 195 Comp SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe		74-135/110
81.5%		201/157
78.1%
62.7/78.1
186/231
.723/.713
413 hp		249/180
72.3%
77.7/89.5
230/265
.672/.613
512 hp
556		275/195
70.9%
85.8/97
254/287
.594/.531
566 hp
614		280/208
74.3%
87.4/103
259/307
.504/.472
576 hp
625
703		----228/170
74.6%
-
.409/.324
AFR 195 Eliminator Street SF600 Alum195/-2.05/1.6075-137/110
80.3%		194/158
81.4%
58.8/78.6
174/233
.688/.718
399 hp		240/190
79.2%
72.7/94.5
215/280
.638/.647
494 hp
536		270/207
76.7%
81.8/103
242/305
.574/.564
555 hp
603		286/215
75.2%
86.6/107
257/317
.507/.488
588 hp
638
718		----225/176
78.1%
1.47
.415/.324
AFR 195 Eliminator David Vizard / GoFastNews.com Alum195/652.05/1.607575/57
76%		139/113
81.3%		198/160
80.8%
60/79.6
178/236
.702/.727
407 hp		250/190
76%
75.7/94.5
224/280
.665/.647
514 hp
558		277/207
74.7%
83.9/103
249/305
.589/.564
570 hp
618		292/216
74%
88.5/107
262/318
.518/.491
601 hp
652
733		295/220
74.6%
89.4/109
265/324
.448/.428
607 hp
658
740		---242/184
76.2%
1.51/3.38
.415/.324
AFR 195 Eliminator Comp SF600 Alum195/-2.08/1.6075-140/115
82.1%		202/165
81.7%
59.4/82.1
176/243
.706/.749
416 hp		248/200
80.6%
73/99.5
216/295
.65/.681
510 hp
554		280/217
77.5%
82.4/108
244/320
.587/.591
576 hp
625		300/225
75%
88.3/112
262/332
.524/.511
617 hp
670
753		----234/184
78.8%
1.54
.421/.324
AFR 195 Eliminator Comp Out of Box Hemphill Racing SF600 Alum195/-2.08/1.60
4.04
No Pipe		7565/53
81.5%		150/116
77.3%		211/175
82.9%
62.1/87
184/258
.737/.795
434 hp		255/208
81.6%
75/103
222/307
.668/.709
525 hp
569		285/219
76.8%
83.9/109
249/323
.597/.597
586 hp
636		305/219
71.8%
89.8/109
266/323
.533/.497
627 hp
681
766		----241/187
77.7%
1.56
.421/.324
AFR 210 Eliminator Dr Js Performance AlumN/A2.10/1.625
-
1 3/4" Pipe		N/A70/57
81.4%		147/112
76.2%		201/157
78.1%
58/75.7
172/224
.696/.702
413 hp		245/190
77.6%
70.7/91.6
210/271
.636/.637
504 hp
547		266/201
75.6%
76.8/96.9
228/287
.552/.539
547 hp
594		267/206
77.2%
77.1/99.3
228/294
.462/.461
549 hp
596
670		267/210
78.7%
77.1/101
228/300
.396/.402
549 hp
596
670		---232/179
77.2%
-
.425/.329
AFR 210 Eliminator CNC Dr Js Performance AlumN/A2.10/1.625
-
1 3/4" Pipe		N/A76/58
76.3%		148/117
79.1%		203/165
81.3%
58.6/79.6
174/236
.703/.738
418 hp		252/210
83.3%
72.8/101
216/300
.654/.704
518 hp
562		286/234
81.8%
82.6/113
245/334
.594/.628
588 hp
638		304/250
82.2%
87.8/121
260/357
.526/.559
625 hp
679
763		315/258
81.9%
90.9/124
269/369
.467/.494
648 hp
703
791		---251/206
81.8%
-
.425/.329
AFR 210 Race Old SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe		76-135/112
83%		197/145
73.6%
58/72.1
172/214
.688/.659
405 hp		245/185
75.5%
72.1/92
214/273
.642/.63
504 hp
547		273/205
75.1%
80.3/102
238/302
.572/.559
562 hp
609		282/215
76.2%
83/107
246/317
.493/.488
580 hp
629
708		285/220
77.2%
83.9/109
249/324
.427/.428
586 hp
636
715		---236/180
76.4%
1.36/2.75
.421/.324
AFR 210 Street SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe		76-139/110
79.1%		199/158
79.4%
58.6/78.6
174/233
.695/.718
409 hp		249/192
77.1%
73.3/95.5
217/283
.652/.654
512 hp
556		279/210
75.3%
82.1/104
243/309
.585/.572
574 hp
623		295/220
74.6%
86.8/109
257/324
.515/.50
607 hp
658
740		301/224
74.4%
88.6/111
262/330
.451/.436
619 hp
672
755		---244/186
76.2%
1.43/2.80
.421/.324
AFR 210 Comp SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe		76-147/120
81.6%		206/166
80.6%
60.6/82.6
180/245
.72/.754
424 hp		257/214
83.3%
75.6/106
224/315
.673/.729
529 hp
574		290/225
77.6%
85.3/112
253/332
.608/.613
597 hp
647		308/235
76.3%
90.6/117
269/346
.538/.534
634 hp
687
773		312/240
76.9%
91.8/119
272/354
.467/.467
642 hp
696
783		---253/200
78.9%
1.49/3.00
.421/.324
AFR 210 CNC Meaux Racing Heads Out of Box Alum210/802.08/1.60
4.00
No Pipe		N/A-130/115
88.5%		185/154
83.2%
54.4/76.6
161/227
.646/.699
381 hp		233/182
78.1%
68.6/90.5
203/268
.611/.62
479 hp
520		270/196
72.6%
79.5/97.5
235/289
.566/.534
555 hp
603		280/205
73.2%
82.4/102
244/302
.489/.466
576 hp
625
703		284/212
74.6%
83.6/105
248/312
.425/.413
584 hp
634
713		283/216
76.3%
83.3/107
247/318
.371/.368
582 hp
632
710		--238/183
76.9%
1.35/2.70
.421/.324
AFR 210 CNC Out of Box Alum210/802.08/1.60N/A-144/118
81.9%		202/167
82.7%
59.4/83.1
176/246
.706/.759
416 hp		249/198
79.5%
73.3/98.5
217/292
.652/.675
512 hp
556		278/207
74.5%
81.8/103
242/305
.583/.564
572 hp
620		284/210
73.9%
83.6/104
248/309
.496/.477
584 hp
634
713		280/212
75.7%
82.4/105
244/312
.419/.413
576 hp
625
703		---240/185
77.4%
1.35/2.65
.421/.324
AFR 210 CNC Out of Box Weingartner Racing Alum210/-2.08/1.60
4.125
No Pipe		N/A70/55
78.6%		140/111
79.3%		199/150
75.4%
58.6/74.6
174/221
.695/.681
409 hp		248/185
74.6%
73/92
216/273
.65/.63
510 hp
554		276/206
74.6%
81.2/102
241/304
.579/.561
568 hp
616		282/216
76.6%
83/107
246/318
.493/.491
580 hp
629
708		291/221
75.9%
85.6/110
254/326
.436/.43
599 hp
649
730		289/224
77.5%
85.1/111
252/330
.379/.382
595 hp
645
725		--246/188
76.1%
1.39
.421/.324
AFR 220 Race SF600 Alum220/802.08/1.60
4.125
1 7/8" Pipe		76-132/112
84.8%		190/145
76.3%
55.9/72.1
166/214
.664/.659
391 hp		248/185
74.6%
73/92
216/273
.65/.63
510 hp
554		280/205
73.2%
82.4/102
244/302
.587/.559
576 hp
625		286/215
75.2%
84.2/107
249/317
.50/.488
588 hp
638
718		292/220
75.3%
85.9/109
255/324
.437/.428
601 hp
652
733		---238/180
75.8%
1.33/2.75
.421/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR 220 Comp SF600 Alum220/802.08/1.60
4.125
1 7/8" Pipe		76-135/112
83%		198/150
75.8%
58.3/74.6
173/221
.692/.681
407 hp		255/190
74.5%
75/94.5
222/280
.668/.647
525 hp
569		290/207
71.4%
85.3/103
253/305
.608/.564
597 hp
647		298/220
73.8%
87.7/109
260/324
.521/.50
613 hp
665
748		303/230
75.9%
89.2/114
264/339
.454/.448
623 hp
676
760		---247/185
75%
1.38/2.88
.421/.324
AFR 220 Eliminator Comp SF600 Alum220/-2.10/1.6065-150/126
84%		207/178
86%
59.8/88.5
177/262
.716/.808
426 hp		260/215
82.7%
75.1/107
222/317
.675/.732
535 hp
580		296/236
79.7%
85.5/117
253/348
.615/.643
609 hp
661		322/247
76.7%
93/123
275/364
.557/.561
662 hp
719
808		331/251
75.8%
95.6/125
283/370
.491/.489
681 hp
739
831		---261/209
80%
1.50
.425/.324
AFR 227 Race Old SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe		N/A-135/112
83%		192/145
75.5%
55.4/72.1
164/214
.664/.659
395 hp		250/185
74%
72.2/92
214/273
.649/.63
514 hp
558		288/205
71.2%
83.2/102
246/302
.598/.559
592 hp
643		292/215
73.6%
84.3/107
250/317
.505/.488
601 hp
652
733		295/220
74.6%
85.2/109
252/324
.438/.428
607 hp
658
740		---242/180
74.5%
1.30/2.75
.425/.324
AFR 227 Comp Old SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe		N/A-138/112
81.2%		207/150
72.5%
59.8/74.6
177/221
.716/.681
426 hp		258/190
73.6%
74.5/94.5
221/280
.67/.647
531 hp
576		294/207
70.4%
84.9/103
252/305
.61/.564
605 hp
656		302/220
72.8%
87.2/109
258/324
.523/.50
621 hp
674
758		309/230
74.4%
89.2/114
264/339
.458/.448
636 hp
690
776		---251/185
73.5%
1.36/2.88
.425/.324
AFR 227 Street 60/40 SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe		N/A-148/114
77%		210/162
77.1%
60.6/80.6
180/239
.727/.736
432 hp		259/204
78.8%
74.8/101
222/301
.672/.695
533 hp
578		292/220
75.3%
84.3/109
250/324
.606/.60
601 hp
652		305/229
75.1%
88.1/114
261/337
.528/.52
627 hp
681
766		----243/186
76.5%
1.34/2.86
.425/.324
AFR 227 Comp 60/40 SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe		N/A-153/120
78.4%		214/167
78%
61.8/83.1
183/246
.741/.759
440 hp		265/214
80.8%
76.5/106
227/315
.688/.729
545 hp
591		298/230
77.2%
86/114
255/339
.619/.627
613 hp
665		315/238
75.6%
90.9/118
269/351
.545/.541
648 hp
703
791		----249/194
77.8%
1.39/2.98
.425/.324
AFR 227 Comp 60/40 Out of Box AlumN/A2.10/1.60
-
No Pipe		N/A-154/114
74%		208/165
79.3%
60.1/82.1
178/243
.72/.749
428 hp		264/205
77.7%
76.2/102
226/302
.685/.698
543 hp
589		304/223
73.4%
87.8/111
260/329
.631/.608
625 hp
679		325/232
71.4%
93.8/115
278/342
.562/.527
669 hp
725
816		----251/188
74.8%
-
.425/.324
AFR 227 Eliminator CNC Out of Box Weingartner Racing Alum210/-2.10/1.60
4.125
No Pipe		N/A75/61
81.3%		160/123
76.9%		217/170
78.3%
62.7/84.6
186/251
.751/.772
446 hp		269/208
77.3%
77.7/103
230/307
.698/.709
553 hp
600		303/220
72.6%
87.5/109
259/324
.629/.60
623 hp
676		322/227
70.5%
93/113
275/335
.557/.516
662 hp
719
808		321/233
72.6%
92.7/116
275/343
.476/.454
660 hp
716
806		322/234
72.7%
93/116
275/345
.418/.399
662 hp
719
808		--273/202
73.9%
1.53
.425/.324
AFR 235 CNC SF600 Alum235/-2.125/1.60
4.125
1 7/8" Pipe		N/A-159/120
75.5%		221/175
79.2%
62.3/87
185/258
.756/.795
455 hp		270/214
79.3%
76.1/106
226/315
.693/.729
555 hp
603		305/235
77%
86/117
255/346
.626/.64
627 hp
681		324/247
76.2%
91.4/123
271/364
.554/.561
667 hp
723
813		334/254
76%
94.2/126
279/374
.49/.494
687 hp
745
838		340/256
75.3%
95.9/127
284/377
.436/.436
699 hp
759
853		--279/214
76.9%
1.45
.430/.324
AFR 235 Eliminator CNC Out of Box Weingartner Racing Alum235/-2.125/1.60
4.125
No Pipe		7079/58
73.4%		169/117
69.2%		236/172
72.9%
66.5/85.5
197/253
.807/.781
485 hp		274/205
74.8%
77.3/102
229/302
.703/.698
564 hp
612		306/221
72.2%
86.3/110
256/326
.628/.602
629 hp
683		322/231
71.7%
90.8/115
269/340
.551/.525
662 hp
719
808		333/237
71.2%
93.9/118
278/349
.488/.461
685 hp
743
836		339/241
71.1%
95.6/120
283/355
.435/.41
697 hp
757
851		341/245
71.8%
96.1/122
285/361
.389/.371
701 hp
761
856		-290/209
71.9%
1.45
.430/.324
AFR 23 Deg 215 RR SF600 Alum215/802.10/1.60
4.125
1 7/8" Pipe		76-150/112
74.7%		220/150
68.2%
63.5/74.6
188/221
.761/.681
453 hp		276/190
68.8%
79.7/94.5
236/280
.716/.647
568 hp
616		308/207
67.2%
88.9/103
263/305
.64/.564
634 hp
687		315/220
69.8%
90.9/109
269/324
.545/.50
648 hp
703
791		325/230
70.8%
93.8/114
278/339
.482/.448
669 hp
725
816		---266/185
69.6%
1.51/2.88
.425/.324
AFR 18 Deg GM SF600243/100-65-147/109
74.1%		219/160
73.1%
-
451 hp		273/204
74.7%
-
562 hp
609		319/230
72.1%
-
656 hp
712		329/246
74.8%
-
677 hp
734
826		340/255
75%
-
699 hp
759
853		---271/201
74%
1.40/2.55
AJPE 23 Deg 250250/-2.15/1.525
4.03
No Pipe		54-148/106
71.6%		221/153
69.2%
60.9/83.8
180/248
.747/.729
455 hp		281/193
68.7%
77.4/106
229/313
.712/.69
578 hp
627		318/223
70.1%
87.6/122
260/362
.645/.638
654 hp
710		328/232
70.7%
90.3/127
268/376
.554/.553
675 hp
732
823		336/238
70.8%
92.5/130
274/386
.487/.486
691 hp
750
843		347/-
95.6
283
.44
714 hp
774
871		--283/191
-
1.39
.435/.309
AJPE 23 Deg 283283/-2.18/1.60
4.125
No Pipe		61-142/103
72.5%		221/143
64.7%
59.2/71.1
175/211
.737/.65
455 hp		281/205
73%
75.3/102
223/302
.703/.698
578 hp
627		325/222
68.3%
87.1/110
258/327
.65/.605
669 hp
725		347/230
66.3%
93/114
275/339
.578/.522
714 hp
774
871		364/238
65.4%
97.5/118
289/351
.52/.463
749 hp
812
914		369/248
67.2%
98.9/123
293/365
.461/.422
759 hp
824
926		374/-
100
297
.416
769 hp
835
939		-303/198
-
1.32
.441/.324
AJPE 18 Deg 250250/-2.125/1.60
4.03
No Pipe		N/A-145/114
78.6%		216/164
75.9%
60.9/81.6
180/242
.739/.745
444 hp		267/217
81.3%
75.3/108
223/320
.685/.739
549 hp
596		303/243
80.2%
85.4/121
253/358
.622/.662
623 hp
676		325/251
77.2%
91.6/125
272/370
.556/.57
669 hp
725
816		336/255
75.9%
94.7/127
281/376
.492/.496
691 hp
750
843		---265/207
78.1%
1.34
.430/.324
AJPE 18 Deg 270270/-2.18/1.60
4.125
No Pipe		N/A-148/114
77%		225/164
72.9%
60.3/81.6
179/242
.75/.745
463 hp		275/217
78.9%
73.7/108
218/320
.688/.739
566 hp
614		314/243
77.4%
84.1/121
249/358
.628/.662
646 hp
701		352/251
71.3%
94.3/125
279/370
.587/.57
724 hp
786
883		356/255
71.6%
95.4/127
283/376
.509/.496
732 hp
795
894		---278/207
74.5%
1.32
.441/.324
AJPE 18 Deg 279279/-2.20/1.625
4.125
No Pipe		N/A-143/111
77.6%		223/166
74.4%
58.7/80
174/237
.737/.742
459 hp		278/225
80.9%
73.1/108
217/321
.689/.755
572 hp
620		319/245
76.8%
83.9/118
249/350
.632/.657
656 hp
712		353/255
72.2%
92.9/123
275/364
.583/.57
726 hp
788
886		368/260
70.7%
96.8/125
287/371
.521/.498
757 hp
821
924		---281/210
74.9%
1.32
.446/.329
AJPE 12 Deg 280 Weingarter Racing Brez280/-2.10/1.625
4.155
No Pipe		N/A68/46
67.6%		129/78
60.5%		201/123
61.2%
58/59.3
172/176
.696/.55
413 hp		272/167
61.4%
78.5/80.5
233/239
.706/.56
560 hp
607		323/195
60.4%
93.3/94
276/279
.671/.523
664 hp
721		354/216
61%
102/104
303/309
.613/.483
728 hp
790
888		358/231
64.5%
103/111
306/330
.531/.443
736 hp
799
899		359/240
66.9%
104/116
307/343
.466/.402
739 hp
801
901		--285/179
62.6%
1.28
.425/.329
AJPE 13 Deg Canted Valves Billet344/1142.25/1.65
4.125
2.1" Pipe		53-125/105
84%		196/159
81.1%
49.3/74.4
146/220
.633/.70
403 hp		268/216
80.6%
67.4/101
200/299
.649/.714
551 hp
598		326/255
78.2%
82/119
243/353
.632/.674
671 hp
728		375/284
75.7%
94.3/133
279/394
.606/.625
771 hp
837
941		410/305
74.4%
103/143
306/423
.568/.576
843 hp
915
1029		420/319
76%
106/149
313/442
.509/.527
864 hp
937
1054		--303/235
77.5%
1.22/2.80
.456/.334
All PRO II-13 Ported Jones Engineering AlumN/A2.20/1.625N/A-165/124
75.2%		245/204
83.3%
64.5/98.4
191/291
.809/.912
504 hp		299/248
82.9%
78.7/120
233/354
.741/.832
615 hp
667		343/272
79.3%
90.2/131
267/389
.68/.73
706 hp
766		364/278
76.4%
95.8/134
284/397
.601/.622
749 hp
812
914		386/292
75.6%
102/141
301/417
.546/.56
794 hp
862
969		---300/236
78.7%
-
.446/.329
All PRO RE-18 Ported Ron's Alum274/-2.15/1.62542-57-165/128
77.6%		239/183
76.6%
65.8/88.2
195/261
.808/.818
492 hp		290/236
81.4%
79.9/114
237/337
.735/.792
597 hp
647		318/268
84.3%
87.6/129
260/383
.645/.719
654 hp
710		341/274
80.4%
93.9/132
278/391
.576/.613
701 hp
761
856		354/280
79.1%
97.5/135
289/400
.513/.537
728 hp
790
888		---285/228
80.2%
1.29
.435/.329
All PRO RE-15 Ported AlumN/A2.19/1.60N/A-164/128
78%		228/211
92.5%
60.5/105
179/311
.757/.958
469 hp		281/247
87.9%
74.6/123
221/364
.699/.841
578 hp
627		327/268
82%
86.8/133
257/395
.651/.73
673 hp
730		353/278
78.8%
93.7/138
278/410
.586/.631
726 hp
788
886		369/282
76.4%
98/140
290/416
.525/.549
759 hp
824
926		---287/236
82.1%
-
.443/.324
All PRO LM-13 Deg Ported Alum270/-2.18/1.6035-50-155/120
77.4%		232/180
77.6%
62.2/89.5
184/265
.773/.818
477 hp		296/230
77.7%
79.3/114
235/339
.74/.784
609 hp
661		340/246
72.4%
91.1/122
270/363
.68/.67
699 hp
759		362/255
70.4%
97/127
287/376
.603/.579
745 hp
808
909		372/263
70.7%
99.7/131
295/388
.531/.512
765 hp
830
934		---293/216
73.6%
1.38
.441/.324
All PRO LM-13 Deg Ported Alum278/-2.18/1.62535-50-150/124
82.7%		232/204
87.9%
62.2/98.4
184/291
.773/.912
477 hp		298/248
83.2%
79.8/120
237/354
.745/.832
613 hp
665		342/272
79.5%
91.6/131
271/389
.684/.73
704 hp
763		367/278
75.7%
98.3/134
291/397
.612/.622
755 hp
819
921		378/292
77.2%
101/141
300/417
.54/.56
778 hp
844
949		---295/236
80.2%
1.36
.441/.329
All PRO 13 Deg CNC MBE Sprint Car AlumN/A-N/A68/47
69.1%		135/96
71.1%		211/152
72%
-
434 hp		290/202
69.7%
-
597 hp
647		344/239
69.5%
-
708 hp
768		382/259
67.8%
-
786 hp
853
959		397/271
68.3%
-
817 hp
886
996		406/278
68.5%
-
835 hp
906
1019		413/280
67.8%
-
850 hp
922
1037		420/281
66.9%
-
864 hp
937
1054		333/229
68.6%
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
All PRO 13 Deg CNC Jones Engineering Alum282/-2.18/1.62547-147/112
76.2%		232/164
70.7%
62.2/79.1
184/234
.773/.733
477 hp		306/223
72.9%
82/108
243/319
.765/.748
629 hp
683		351/246
70.1%
94/119
279/351
.702/.66
722 hp
783		386/252
65.3%
103/122
306/360
.643/.563
794 hp
862
969		392/258
65.8%
105/124
311/369
.56/.494
806 hp
875
984		---302/209
69.2%
1.39
.441/.329
All PRO 13 Deg CNC Jones Engineering Alum292/-2.20/1.6047-150/113
75.3%		228/164
71.9%
60/81.6
178/242
.753/.745
469 hp		290/219
75.5%
76.3/109
226/323
.718/.746
597 hp
647		339/246
72.6%
89.2/122
264/363
.672/.67
697 hp
757		374/256
68.4%
98.4/127
292/377
.618/.581
769 hp
835
939		391/262
67%
103/130
305/386
.554/.51
804 hp
873
981		396/266
67.2%
104/132
309/392
.491/.453
815 hp
884
994		--310/218
70.4%
1.36
.446/.324
All PRO 13.5 Deg CNC Jones Engineering Alum306/-2.23/1.6049-138/117
84.8%		213/169
79.3%
54.5/84.1
162/249
.694/.768
438 hp		279/218
78.1%
71.4/108
212/321
.682/.743
574 hp
623		333/246
73.9%
85.3/122
253/363
.651/.67
685 hp
743		383/258
67.4%
98.1/128
291/380
.624/.586
788 hp
855
961		410/265
64.6%
105/132
311/391
.573/.516
843 hp
915
1029		418/268
64.1%
107/133
317/395
.511/.456
860 hp
933
1049		--311/220
70.9%
1.37
.452/.324
All PRO 272 22 Deg Ported Jones Engineering Alum278/-2.18/1.6068-149/118
79.2%		217/172
79.3%
58.1/85.5
172/253
.723/.781
446 hp		276/221
80.1%
73.9/110
219/326
.69/.753
568 hp
616		321/239
74.5%
86/119
255/352
.642/.651
660 hp
716		357/246
68.9%
95.6/122
283/363
.595/.559
734 hp
797
896		371/251
67.7%
99.4/125
295/370
.53/.489
763 hp
828
931		---282/208
73.7%
1.33
.441/.324
All PRO 23 Deg Ported Alum219/-2.10/1.6060-74-151/109
72.2%		219/165
75.3%
63.2/82.1
187/243
.758/.749
451 hp		266/221
83.1%
76.8/110
228/326
.69/.753
547 hp
594		288/243
84.4%
83.2/121
246/358
.598/.662
592 hp
643		308/250
81.2%
88.9/124
263/368
.533/.568
634 hp
687
773		314/253
80.6%
90.7/126
269/373
.466/.492
646 hp
701
788		---258/207
80.3%
1.43
.425/.324
All PRO 23 Deg Ported Jones Engineering Alum242/-2.125/1.6070-156/108
69.2%		210/169
80.5%
59.2/84.1
175/249
.718/.768
432 hp		266/216
81.2%
75/107
222/318
.682/.736
547 hp
594		311/230
74%
87.7/114
260/339
.638/.627
640 hp
694		333/238
71.5%
93.9/118
278/351
.569/.541
685 hp
743
836		340/243
71.5%
95.9/121
284/358
.498/.473
699 hp
759
853		---269/201
74.5%
1.40
.430/.324
All PRO 23 Deg Ported Kelford Cams 360 SprintCar AlumN/A2.125/1.625N/A88/47
53.4%		162/104
64.2%		224/158
70.5%
63.2/76.2
187/226
.766/.707
461 hp		268/222
82.8%
75.6/107
224/317
.687/.745
551 hp
598		300/239
79.7%
84.6/115
251/341
.616/.641
617 hp
670		324/247
76.2%
91.4/119
271/353
.554/.552
667 hp
723
813		331/255
77%
93.3/123
277/364
.485/.489
681 hp
739
831		---268/204
76.1%
-
.430/.329
All PRO 23 Deg Ported Rons Porting Service Alum245/-2.18/1.625N/A-153/123
80.4%		212/172
81.1%
56.8/82.9
168/246
.707/.769
436 hp		272/210
77.2%
72.9/101
216/300
.68/.704
560 hp
607		322/239
74.2%
86.3/115
256/341
.644/.641
662 hp
719		358/251
70.1%
95.9/121
284/359
.597/.561
736 hp
799
899		379/258
68.1%
102/124
301/369
.541/.494
780 hp
846
951		382/261
68.3%
102/126
303/373
.478/.438
786 hp
853
959		--297/216
72.9%
1.56
.441/.329
All PRO 23 Deg Rolled to 16.8 Deg Ported BES Alum288/-2.18/1.62543.5-114/91
79.8%		205/176
85.9%
54.9/84.9
163/251
.683/.787
422 hp		268/233
86.9%
71.8/112
213/333
.67/.782
551 hp
598		314/262
83.4%
84.1/126
249/374
.628/.703
646 hp
701		353/286
81%
94.6/138
280/409
.588/.64
726 hp
788
886		374/302
80.7%
100/146
297/431
.534/.579
769 hp
835
939		381/311
81.6%
102/150
302/444
.476/.522
784 hp
850
956		381/317
83.2%
102/153
302/453
.423/.473
784 hp
850
956		-299/247
82.8%
1.32
.441/.329
All PRO 23 Deg RR 245 Ported BES AlumN/A-2.18/1.625
4.155		N/A-122/112
91.8%		187/165
88.2%
50.1/79.6
148/236
.623/.738
385 hp		250/218
87.2%
67/105
198/311
.625/.731
514 hp
558		301/248
82.4%
80.6/120
239/354
.602/.665
619 hp
672		339/264
77.9%
90.8/127
269/377
.565/.59
697 hp
757
851		362/274
75.7%
97/132
287/391
.517/.525
745 hp
808
909		368/279
75.8%
98.6/135
292/399
.46/.468
757 hp
821
924		371/280
75.5%
99.4/135
295/400
.412/.417
763 hp
828
931		-288/230
80%
-
.441/.329
Avenger 180 23 Deg Alum180/722.02/1.6060/6864/60
93.8%		128/110
85.9%		178/150
84.3%
55.5/74.6
165/221
.64/.681
366 hp		227/188
82.8%
70.8/93.5
210/277
.613/.64
467 hp
507		258/204
79.1%
80.5/101
239/301
.557/.556
531 hp
576		270/215
79.6%
84.3/107
250/317
.486/.488
555 hp
603
678		270/215
79.6%
84.3/107
250/317
.416/.419
555 hp
603
678		270/215
79.6%
84.3/107
250/317
.364/.366
555 hp
603
678		--229/185
81%
1.50/2.99
.409/.324
Avenger 190 23 Deg Alum190/-2.02/1.6060/6764/61
95.3%		128/115
89.8%		181/150
82.9%
56.5/74.6
167/221
.651/.681
372 hp		227/190
83.7%
70.8/94.5
210/280
.613/.647
467 hp
507		260/209
80.4%
81.1/104
240/308
.561/.57
535 hp
580		277/227
81.9%
86.4/113
256/335
.498/.516
570 hp
618
695		280/231
82.5%
87.4/115
259/340
.432/.45
576 hp
625
703		280/231
82.5%
87.4/115
259/340
.378/.393
576 hp
625
703		--233/193
82.9%
1.47
.409/.324
Avenger 210 23 Deg Alum210/802.055/1.6060/6769/61
88.4%		139/115
82.7%		194/150
77.3%
58.5/74.6
173/221
.686/.681
399 hp		240/190
79.2%
72.4/94.5
214/280
.637/.647
494 hp
536		277/209
75.5%
83.5/104
247/308
.588/.57
570 hp
618		299/227
75.9%
90.1/113
267/335
.529/.516
615 hp
667
750		304/234
77%
91.7/116
272/345
.461/.456
625 hp
679
763		304/234
77%
91.7/116
272/345
.403/.399
625 hp
679
763		--251/194
77.3%
1.45/2.93
.416/.324
Avenger 15 Deg Alum290/902.18/1.6061/6979/62
78.5%		159/120
75.5%		223/167
74.9%
59.7/83.1
177/246
.743/.759
459 hp		290/218
75.2%
77.7/108
230/321
.725/.743
597 hp
647		335/232
69.3%
89.8/115
266/342
.67/.632
689 hp
748		361/240
66.5%
96.7/119
287/354
.602/.545
743 hp
806
906		372/248
66.7%
99.7/123
295/365
.531/.483
765 hp
830
934		381/255
66.9%
102/127
302/376
.476/.434
784 hp
850
956		--303/211
69.8%
1.31/2.83
.441/.324
BMF 18 Deg 238 CNC Alum238/902.15/1.6066--241/178
73.9%
66.4/88.5
197/262
.815/.808
496 hp		299/223
74.6%
82.4/111
244/329
.758/.76
615 hp
667		340/236
69.4%
93.7/117
277/348
.69/.643
699 hp
759		348/243
69.8%
95.9/121
284/358
.588/.552
716 hp
777
873		350/247
70.6%
96.4/123
286/364
.507/.481
720 hp
781
878		351/250
71.2%
96.7/124
286/368
.445/.426
722 hp
783
881		353/251
71.1%
97.2/125
288/370
.398/.38
726 hp
788
886		-326/233
71.3%
1.48/2.79
.435/.324
BMF 18 Deg 248 CNC Alum248/902.15/1.6066--239/178
74.5%
65.8/88.5
195/262
.808/.808
492 hp		302/223
73.8%
83.2/111
246/329
.766/.76
621 hp
674		344/236
68.6%
94.8/117
281/348
.698/.643
708 hp
768		352/243
69%
97/121
287/358
.595/.552
724 hp
786
883		362/247
68.2%
99.7/123
295/364
.524/.481
745 hp
808
909		365/250
68.5%
101/124
298/368
.463/.426
751 hp
815
916		365/251
68.8%
101/125
298/370
.411/.38
751 hp
815
916		-333/233
69.9%
1.47/2.79
.435/.324
BMF 18 Deg 260 CNC Alum260/902.15/1.6066--242/178
73.6%
66.7/88.5
198/262
.818/.808
498 hp		300/223
74.3%
82.6/111
245/329
.761/.76
617 hp
670		342/236
69%
94.2/117
279/348
.694/.643
704 hp
763		361/243
67.3%
99.4/121
295/358
.61/.552
743 hp
806
906		369/247
66.9%
102/123
301/364
.535/.481
759 hp
824
926		370/250
67.6%
102/124
302/368
.469/.426
761 hp
826
929		370/251
67.8%
102/125
302/370
.417/.38
761 hp
826
929		-336/233
69.2%
1.42/2.79
.435/.324
BMF 18 Deg CNC OLD Alum268/902.18/1.60N/A-145/131
90.3%		208/177
85.1%
55.7/88
165/261
.693/.804
428 hp		266/215
80.8%
71.3/107
211/317
.665/.732
547 hp
594		313/242
77.3%
83.9/120
248/357
.626/.66
644 hp
699		338/253
74.9%
90.6/126
268/373
.563/.575
695 hp
754
848		351/260
74.1%
94/129
279/383
.501/.506
722 hp
783
881		368/262
71.2%
98.6/130
292/386
.46/.446
757 hp
821
924		--284/220
77.4%
1.37/2.91
.441/.324
BMF 18 Deg 268 CNC Alum268/902.18/1.6066--242/178
73.6%
64.8/88.5
192/262
.807/.808
498 hp		300/223
74.3%
80.4/111
238/329
.75/.76
617 hp
670		342/236
69%
91.6/117
271/348
.684/.643
704 hp
763		369/243
65.9%
98.9/121
293/358
.615/.552
759 hp
824
926		375/247
65.9%
100/123
298/364
.536/.481
771 hp
837
941		379/250
66%
102/124
301/368
.474/.426
780 hp
846
951		382/251
65.7%
102/125
303/370
.424/.38
786 hp
853
959		-341/233
68.1%
1.43/2.79
.441/.324
BMF SBX 4.5 Bore CNC Darin Morgan SF600 AlumN/A2.30/1.65
-
No Pipe		N/A-159/-244/-
58.7
174
.771
502 hp		319/-
76.8
227
.756
656 hp
712		386/-
92.9
275
.732
794 hp
862		432/-
104
308
.682
889 hp
964
1084		447/-
108
319
.605
920 hp
998
1122		463/-
111
330
.549
952 hp
1033
1162		469/-
113
334
.494
965 hp
1047
1177		478/-
115
341
.453
983 hp
1067
1200		377
-
-
.466/.334
Brodix CARB Legal Alum170/-2.02/1.6067-132/93
70.5%		185/134
72.4%
57.7/66.6
171/197
.666/.609
381 hp		217/159
73.3%
67.7/79.1
201/234
.586/.542
446 hp
484		215/174
80.9%
67.1/86.5
199/256
.464/.474
442 hp
480		212/180
84.9%
66.2/89.5
196/265
.381/.409
436 hp
473
532		----192/148
77%
1.28
.409/.324
Brodix SP CH Alum215/-2.08/1.6067-121/92
76%		176/134
76.1%
51.8/66.6
153/197
.615/.609
362 hp		223/158
70.9%
65.6/78.6
194/233
.584/.538
459 hp
498		249/172
69.1%
73.3/85.5
217/253
.522/.469
512 hp
556		261/179
68.6%
76.8/89
228/264
.456/.407
537 hp
583
655		269/182
67.7%
79.2/90.5
235/268
.403/.354
553 hp
600
675		---217/153
70.6%
1.25
.421/.324
Brodix BP HH 23 Deg 40/60 I-50 E-45 Alum229/-2.125/1.6068-139/122
87.8%		205/166
81%
57.8/82.6
171/245
.701/.754
422 hp		257/200
77.8%
72.5/99.5
215/295
.659/.681
529 hp
574		300/219
73%
84.6/109
251/323
.616/.597
617 hp
670		319/227
71.2%
89.9/113
267/335
.545/.516
656 hp
712
801		325/236
72.6%
91.6/117
272/348
.476/.459
669 hp
725
816		---258/195
75.7%
1.42
.430/.324
Brodix -8 STD FSH CARB Legal Alum185/-2.08/1.6067-134/106
79.1%		191/135
70.7%
56.2/67.1
167/199
.667/.613
393 hp		229/152
66.4%
67.4/75.6
200/224
.60/.518
471 hp
511		233/159
68.2%
68.6/79.1
203/234
.488/.433
479 hp
520		-----197/138
70.1%
1.26
.421/.324
Brodix -8 STD or SP 23 Deg Alum194/-2.08/1.60
-
No Pipe		67-134/109
81.3%		191/138
72.3%
56.2/68.6
167/203
.667/.627
393 hp		230/155
67.4%
67.7/77.1
201/228
.603/.528
473 hp
513		240/161
67.1%
70.6/80.1
209/237
.503/.439
494 hp
536		-----199/141
70.8%
1.24
.421/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix -8 PRO 23 Deg Alum185/-2.02/1.60
-
No Pipe		67-134/106
79.1%		191/135
70.7%
59.6/67.1
177/199
.687/.613
393 hp		230/153
66.5%
71.8/76.1
213/225
.621/.521
473 hp
513		240/160
66.7%
74.9/79.6
222/236
.518/.436
494 hp
536		-----199/139
69.7%
1.30
.409/.324
Brodix -8 STD 23 Deg Ported ET Performance Alum215/-2.08/1.60
4.155		7369/53
76.8%		136/92
67.6%		198/175
88.4%
58.3/87
173/258
.692/.795
407 hp		248/207
83.5%
73/103
216/305
.65/.705
510 hp
554		283/227
80.2%
83.3/113
247/335
.593/.619
582 hp
632		287/237
82.6%
84.5/118
250/349
.501/.538
590 hp
641
720		290/240
82.8%
85.3/119
253/354
.434/.467
597 hp
647
728		---240/196
81.7%
1.35
.421/.324
Brodix -10 STD or SP 23 Deg Alum210/-2.08/1.6067-145/109
75.2%		195/139
71.3%
57.4/69.1
170/205
.681/.631
401 hp		240/155
64.6%
70.6/77.1
209/228
.629/.528
494 hp
536		253/161
63.6%
74.5/80.1
221/237
.53/.439
520 hp
565		262/166
63.4%
77.1/82.6
228/245
.458/.377
539 hp
585
658		262/168
64.1%
77.1/83.6
228/248
.392/.327
539 hp
585
658		---226/150
66.2%
1.25
.421/.324
Brodix -10 WP SP RI 23 Deg Alum240/-2.125/1.6071-151/114
75.5%		223/156
70%
62.9/77.6
186/230
.763/.709
459 hp		273/207
75.8%
77/103
228/305
.70/.705
562 hp
609		304/230
75.7%
85.7/114
254/339
.624/.627
625 hp
679		324/240
74.1%
91.4/119
271/354
.554/.545
667 hp
723
813		332/245
73.8%
93.6/122
277/361
.487/.477
683 hp
741
833		---268/199
74.2%
1.38
.430/.324
Brodix -10 WP SP X - 231 23 Deg Alum231/-2.10/1.6069-152/115
75.7%		222/167
75.2%
64.1/83.1
190/246
.768/.759
457 hp		268/210
78.4%
77.4/104
229/309
.696/.715
551 hp
598		297/227
76.4%
85.7/113
254/335
.617/.619
611 hp
663		313/230
73.5%
90.4/114
268/339
.542/.522
644 hp
699
786		320/234
73.1%
92.4/116
274/345
.475/.456
658 hp
714
803		---262/197
75.3%
1.39
.425/.324
Brodix -10 WP SP X - 233 23 Deg Alum233/-2.125/1.6074-151/115
76.2%		223/167
74.9%
62.9/83.1
186/246
.763/.759
459 hp		269/210
78.1%
75.8/104
225/309
.69/.715
553 hp
600		300/227
75.7%
84.6/113
251/335
.616/.619
617 hp
670		318/230
72.3%
89.7/114
266/339
.544/.522
654 hp
710
798		329/234
71.1%
92.8/116
275/345
.482/.456
677 hp
734
826		---265/197
74.4%
1.41
.430/.324
Brodix -10 WP SP X AP 23 Deg Alum230/-2.125/1.6065-156/107
68.6%		218/155
71.1%
61.5/77.1
182/228
.746/.704
448 hp		271/194
71.6%
76.4/96.5
226/286
.695/.661
557 hp
605		309/239
77.3%
87.1/119
258/352
.634/.651
636 hp
690		336/251
74.7%
94.7/125
281/370
.575/.57
691 hp
750
843		352/258
73.3%
99.3/128
294/380
.516/.502
724 hp
786
883		---274/201
73.3%
1.53
.430/.324
Brodix -10 CNC Jones Engineering Alum240/-2.125/1.6071-151/114
75.5%		223/156
70%
62.9/77.6
186/230
.763/.709
459 hp		273/207
75.8%
77/103
228/305
.70/.705
562 hp
609		304/230
75.7%
85.7/114
254/339
.624/.627
625 hp
679		324/240
74.1%
91.4/119
271/354
.554/.545
667 hp
723
813		332/245
73.8%
93.6/122
277/361
.487/.477
683 hp
741
833		---268/199
74.2%
1.38
.430/.324
Brodix -11 STD or SP 23 Deg Alum221/-2.08/1.6067-132/109
82.6%		188/138
73.4%
55.3/68.6
164/203
.657/.627
387 hp		232/155
66.8%
68.3/77.1
202/228
.608/.528
477 hp
518		260/161
61.9%
76.5/80.1
227/237
.545/.439
535 hp
580		256/166
64.8%
75.3/82.6
223/245
.447/.377
527 hp
571
643		258/167
64.7%
75.9/83.1
225/246
.386/.325
531 hp
576
648		---221/149
67.6%
1.18
.421/.324
Brodix -11 STD X 23 Deg Alum225/-2.08/1.6067-133/90
67.7%		191/126
66%
56.2/62.7
167/186
.667/.572
393 hp		235/158
67.2%
69.2/78.6
205/233
.616/.538
483 hp
525		272/184
67.6%
80/91.5
237/271
.57/.501
560 hp
607		283/200
70.7%
83.3/99.5
247/295
.494/.454
582 hp
632
710		285/208
73%
83.9/103
249/307
.427/.405
586 hp
636
715		---233/161
69%
1.27
.421/.324
Brodix -11 SP X ASCS/SUPR Alum215/-2.08/1.6067-130/100
76.9%		187/132
70.6%
55/65.7
163/195
.653/.60
385 hp		232/162
69.8%
68.3/80.6
202/239
.608/.552
477 hp
518		265/185
69.8%
78/92
231/273
.556/.504
545 hp
591		267/201
75.3%
78.6/100
233/296
.466/.456
549 hp
596
670		270/210
77.8%
79.5/104
235/309
.404/.409
555 hp
603
678		---225/165
73.3%
1.26
.421/.324
Brodix -11 SP X 23 Deg Alum225/-2.08/1.6067-133/103
77.4%		191/137
71.7%
56.2/68.1
167/202
.667/.622
393 hp		235/166
70.6%
69.2/82.6
205/245
.616/.565
483 hp
525		272/188
69.1%
80/93.5
237/277
.57/.512
560 hp
607		283/201
71%
83.3/100
247/296
.494/.456
582 hp
632
710		285/211
74%
83.9/105
249/311
.427/.411
586 hp
636
715		---233/168
71.9%
1.27
.421/.324
Brodix -11 KC SP X 23 Deg Alum231/-2.10/1.6067-146/113
77.4%		203/149
73.4%
58.6/74.1
174/220
.703/.677
418 hp		253/177
70%
73/88
216/261
.657/.603
520 hp
565		293/198
67.6%
84.6/98.5
251/292
.608/.54
603 hp
654		314/228
72.6%
90.7/113
269/336
.543/.518
646 hp
701
788		316/236
74.7%
91.2/117
270/348
.469/.459
650 hp
705
793		---254/184
72.2%
1.37
.425/.324
Brodix -12 WP SP RI - 247 15 Deg CNC Alum247/-2.15/1.6060-152/120
78.9%		230/170
73.9%
63.4/84.6
188/251
.777/.772
473 hp		284/216
76.1%
78.2/107
232/318
.72/.736
584 hp
634		316/233
73.7%
87/116
258/343
.641/.635
650 hp
705		326/240
73.6%
89.8/119
266/354
.551/.545
671 hp
728
818		330/248
75.2%
90.9/123
269/365
.478/.483
679 hp
737
828		---273/205
74.9%
1.34
.435/.324
Brodix -12 WP SP RI - 262 15 Deg CNC Alum262/-2.15/1.6060-150/120
80%		228/170
74.6%
62.8/84.6
186/251
.771/.772
469 hp		282/216
76.6%
77.7/107
230/318
.715/.736
580 hp
629		322/233
72.4%
88.7/116
263/343
.653/.635
662 hp
719		330/240
72.7%
90.9/119
269/354
.558/.545
679 hp
737
828		335/248
74%
92.3/123
273/365
.485/.483
689 hp
748
841		---275/205
74.5%
1.28
.435/.324
Brodix -12 WP SP RI MC 15 Deg CNC Alum262/-2.17/1.6061-155/117
75.5%		224/177
79%
60.6/88
179/261
.75/.804
461 hp		282/218
77.3%
76.2/108
226/321
.708/.743
580 hp
629		329/231
70.2%
89/115
264/340
.661/.63
677 hp
734		335/240
71.6%
90.6/119
268/354
.561/.545
689 hp
748
841		347/247
71.2%
93.8/123
278/364
.498/.481
714 hp
774
871		---279/205
73.6%
1.32
.439/.324
Brodix -12 KC SP B 15 Deg CNC Alum287/-2.15/1.6061-155/120
77.4%		230/168
73%
63.4/83.6
188/248
.777/.763
473 hp		285/216
75.8%
78.5/107
233/318
.723/.736
586 hp
636		320/232
72.5%
88.1/115
261/342
.649/.632
658 hp
714		343/240
70%
94.5/119
280/354
.58/.545
706 hp
766
861		354/247
69.8%
97.5/123
289/364
.513/.481
728 hp
790
888		---281/204
72.5%
1.23
.435/.324
Brodix -12 STS SP WB MC 15 Deg CNC Alum305/-2.20/1.6069-159/106
66.7%		233/145
62.2%
61.3/72.1
182/214
.77/.659
479 hp		290/190
65.5%
76.3/94.5
226/280
.718/.647
597 hp
647		334/221
66.2%
87.9/110
260/326
.662/.602
687 hp
745		361/235
65.1%
95/117
281/346
.596/.534
743 hp
806
906		372/247
66.4%
97.9/123
290/364
.527/.481
765 hp
830
934		---292/191
65.4%
1.22
.446/.324
Brodix -12 15 Deg 288 CNC Chapman Alum288/-2.20/1.625
-
No Pipe		58.573/51
69.9%		163/112
68.7%		238/173
72.7%
62.6/83.4
186/247
.786/.774
490 hp		293/219
74.7%
77.1/106
228/313
.726/.735
603 hp
654		325/238
73.2%
85.5/115
253/340
.644/.639
669 hp
725		362/242
66.9%
95.2/117
282/346
.598/.541
745 hp
808
909		363/251
69.1%
95.5/121
283/359
.514/.481
747 hp
810
911		---291/206
70.8%
1.26
.446/.329
Brodix -12X12 WP SP B - 275 12 Deg CNC Alum275/-2.15/1.6060-166/112
67.5%		236/156
66.1%
65/77.6
193/230
.798/.709
485 hp		293/188
64.2%
80.7/93.5
239/277
.743/.64
603 hp
654		333/237
71.2%
91.7/118
272/349
.675/.646
685 hp
743		344/249
72.4%
94.8/124
281/367
.581/.565
708 hp
768
863		346/255
73.7%
95.3/127
282/376
.501/.496
712 hp
772
868		---286/200
69.7%
1.26
.435/.324
Brodix -12X12 WP SP B - 286 12 Deg CNC Alum286/-2.18/1.6060-154/112
72.7%		228/156
68.4%
61.1/77.6
181/230
.76/.709
469 hp		289/188
65.1%
77.4/93.5
229/277
.723/.64
595 hp
645		334/237
71%
89.5/118
265/349
.668/.646
687 hp
745		357/249
69.7%
95.6/124
283/367
.595/.565
734 hp
797
896		360/255
70.8%
96.4/127
286/376
.514/.496
741 hp
803
904		---287/200
69.5%
1.26
.441/.324
Brodix -12X12 WP SP B - 296 12 Deg CNC Alum296/-2.18/1.6060-165/112
67.9%		230/156
67.8%
61.6/77.6
183/230
.767/.709
473 hp		291/188
64.6%
78/93.5
231/277
.728/.64
599 hp
649		338/237
70.1%
90.6/118
268/349
.676/.646
695 hp
754		358/249
69.6%
95.9/124
284/367
.597/.565
736 hp
799
899		376/255
67.8%
101/127
298/376
.537/.496
773 hp
839
944		---293/200
68.1%
1.27
.441/.324
Brodix -12X12 WP SP B - 299 12 Deg CNC Alum299/-2.20/1.6060-154/119
77.3%		228/158
69.3%
60/78.6
178/233
.753/.718
469 hp		290/216
74.5%
76.3/107
226/318
.718/.736
597 hp
647		343/245
71.4%
90.2/122
267/361
.68/.668
706 hp
766		375/254
67.7%
98.6/126
292/374
.619/.577
771 hp
837
941		388/258
66.5%
102/128
302/380
.549/.502
798 hp
866
974		399/263
65.9%
105/131
311/388
.494/.448
821 hp
891
1001		--311/216
69.5%
1.33
.446/.324
Brodix -12X12 15 Deg 272 CNC Chapman Alum272/-2.18/1.625
-
No Pipe		5673/54
74%		160/109
68.1%		234/171
73.1%
62.7/82.5
186/244
.78/.765
481 hp		292/210
71.9%
78.2/101
232/300
.73/.704
601 hp
652		330/232
70.3%
88.4/112
262/331
.66/.623
679 hp
737		355/241
67.9%
95.1/116
282/344
.592/.539
730 hp
792
891		359/250
69.6%
96.2/121
285/357
.513/.479
739 hp
801
901		368/255
69.3%
98.6/123
292/364
.46/.428
757 hp
821
924		--300/210
70%
1.35
.441/.329
Brodix -12X12 15 Deg 292 CNC Chapman Alum292/-2.20/1.625
-
No Pipe		61.573/54
74%		151/109
72.2%		224/171
76.3%
58.9/82.5
175/244
.74/.765
461 hp		287/210
73.2%
75.5/101
224/300
.711/.704
590 hp
641		337/232
68.8%
88.7/112
263/331
.668/.623
693 hp
752		365/241
66%
96/116
285/344
.603/.539
751 hp
815
916		383/250
65.3%
101/121
299/357
.542/.479
788 hp
855
961		393/255
64.9%
103/123
306/364
.487/.428
808 hp
877
986		--306/210
68.6%
1.35
.446/.329
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix -15 WP SP / STD 15 Deg Ported Alum267/-2.18/1.62551-156/111
71.2%		225/164
72.9%
60.3/79.1
179/234
.75/.733
463 hp		275/223
81.1%
73.7/108
218/319
.688/.748
566 hp
614		327/245
74.9%
87.6/118
260/350
.654/.657
673 hp
730		358/254
70.9%
95.9/122
284/363
.597/.568
736 hp
799
899		362/259
71.5%
97/125
287/370
.517/.496
745 hp
808
909		---284/209
73.8%
1.36
.441/.329
Brodix 15 Deg CNC Alum262/-2.15/1.6060-153/120
78.4%		228/170
74.6%
62.8/84.6
186/251
.771/.772
469 hp		282/216
76.6%
77.7/107
230/318
.715/.736
580 hp
629		322/233
72.4%
88.7/116
263/343
.653/.635
662 hp
719		332/240
72.3%
91.4/119
271/354
.561/.545
683 hp
741
833		340/252
74.1%
93.7/125
277/371
.493/.491
699 hp
759
853		---276/205
74.3%
1.30
.435/.324
Brodix 15 Deg CNC Jones Engineering Alum261/-2.18/1.6051-156/111
71.2%		225/164
72.9%
60.3/81.6
179/242
.75/.745
463 hp		275/223
81.1%
73.7/111
218/329
.688/.76
566 hp
614		327/245
74.9%
87.6/122
260/361
.654/.668
673 hp
730		358/254
70.9%
95.9/126
284/374
.597/.577
736 hp
799
899		362/259
71.5%
97/129
287/382
.517/.504
745 hp
808
909		---284/209
73.8%
1.39
.441/.324
Brodix 15 Deg CNC Rons Porting Service Alum297/-2.20/1.6069-155/125
80.6%		230/175
76.1%
60.5/87
179/258
.76/.795
473 hp		290/210
72.4%
76.3/104
226/309
.718/.715
597 hp
647		340/232
68.2%
89.4/115
265/342
.674/.632
699 hp
759		375/241
64.3%
98.6/120
292/355
.619/.547
771 hp
837
941		386/251
65%
102/125
301/370
.546/.489
794 hp
862
969		---296/206
69.5%
1.30
.446/.324
Brodix -16 KC STD 16 Deg Alum269/-2.18/1.62549-142/119
83.8%		211/161
76.3%
56.5/77.6
167/230
.703/.72
434 hp		277/198
71.5%
74.2/95.5
220/283
.693/.664
570 hp
618		332/233
70.2%
88.9/112
264/333
.664/.625
683 hp
741		367/252
68.7%
98.3/122
291/360
.612/.563
755 hp
819
921		379/261
68.9%
102/126
301/373
.541/.50
780 hp
846
951		---285/204
71.7%
1.41
.441/.329
Brodix 16 Deg CNC Jones Engineering Alum267/-2.18/1.6048-161/101
62.7%		231/149
64.5%
61.9/74.1
183/220
.77/.677
475 hp		291/211
72.5%
78/105
231/311
.728/.719
599 hp
649		337/237
70.3%
90.3/118
268/349
.674/.646
693 hp
752		360/253
70.3%
96.4/126
286/373
.60/.575
741 hp
803
904		371/263
70.9%
99.4/131
295/388
.53/.512
763 hp
828
931		375/268
71.5%
100/133
298/395
.469/.456
771 hp
837
941		--304/212
69.7%
1.40
.441/.324
Brodix -18 STD X 18 Deg Alum244/-2.14/1.6068-157/106
67.5%		212/145
68.4%
58.9/72.1
175/214
.72/.659
436 hp		260/179
68.8%
72.3/89
214/264
.662/.61
535 hp
580		303/195
64.4%
84.2/97
250/287
.617/.531
623 hp
676		319/205
64.3%
88.7/102
263/302
.542/.466
656 hp
712
801		325/211
64.9%
90.4/105
268/311
.473/.411
669 hp
725
816		---263/174
66.1%
1.33
.433/.324
Brodix -18 STD X 18 Deg M2 Race Systems CNC Alum254/-2.14/1.60
4.125		68-145/110
75.9%		214/154
72%
59.5/76.6
176/227
.727/.699
440 hp		261/206
78.9%
72.6/102
215/304
.665/.702
537 hp
583		303/224
73.9%
84.2/111
250/330
.617/.61
623 hp
676		328/231
70.4%
91.2/115
270/340
.557/.525
675 hp
732
823		336/237
70.5%
93.4/118
277/349
.489/.461
691 hp
750
843		---265/194
73.2%
1.32
.433/.324
Brodix -18 SP X 18 Deg Alum244/-2.14/1.6068-157/122
77.7%		212/164
77.4%
58.9/81.6
175/242
.72/.745
436 hp		260/200
76.9%
72.3/99.5
214/295
.662/.681
535 hp
580		303/217
71.6%
84.2/108
250/320
.617/.591
623 hp
676		319/226
70.8%
88.7/112
263/333
.542/.513
656 hp
712
801		325/233
71.7%
90.4/116
268/343
.473/.454
669 hp
725
816		---263/194
73.7%
1.33
.433/.324
Brodix -18 SP X 18 Deg CNC M2 Race Systems Alum253/-2.14/1.60
4.125		68-145/119
82.1%		214/158
73.8%
59.5/78.6
176/233
.727/.718
440 hp		261/196
75.1%
72.6/97.5
215/289
.665/.668
537 hp
583		303/232
76.6%
84.2/115
250/342
.617/.632
623 hp
676		328/243
74.1%
91.2/121
270/358
.557/.552
675 hp
732
823		336/250
74.4%
93.4/124
277/368
.489/.487
691 hp
750
843		---265/200
75.5%
1.33
.433/.324
Brodix -18 SP X 18 Deg Ported Jason Alum258/-2.15/1.60N/A-144/127
88.2%		203/175
86.2%
55.9/87
166/258
.686/.795
418 hp		261/216
82.8%
71.9/107
213/318
.662/.736
537 hp
583		306/233
76.1%
84.3/116
250/343
.621/.635
629 hp
683		334/240
71.9%
92/119
273/354
.564/.545
687 hp
745
838		351/245
69.8%
96.7/122
286/361
.508/.477
722 hp
783
881		359/248
69.1%
98.9/123
293/365
.455/.422
739 hp
801
901		--280/212
75.8%
1.39
.435/.324
Brodix -18 SP 18 Deg 262 CNC Chapman Alum262/-2.15/1.625
-
No Pipe		5672/52
72.2%		161/108
67.1%		225/174
77.3%
62/83.9
184/249
.761/.778
463 hp		273/223
81.7%
75.2/108
223/319
.692/.748
562 hp
609		314/246
78.3%
86.5/119
256/351
.637/.66
646 hp
701		335/257
76.7%
92.3/124
273/367
.566/.575
689 hp
748
841		348/263
75.6%
95.9/127
284/376
.504/.504
716 hp
777
873		---276/212
76.8%
1.33
.435/.329
Brodix -18 WP SP C 18 Deg CNC Alum254/-2.18/1.62556-157/112
71.3%		230/167
72.6%
61.6/80.5
183/239
.767/.747
473 hp		280/209
74.6%
75/101
222/299
.70/.701
576 hp
625		329/227
69%
88.1/109
261/324
.658/.609
677 hp
734		360/238
66.1%
96.4/115
286/340
.60/.532
741 hp
803
904		367/245
66.8%
98.3/118
291/350
.524/.47
755 hp
819
921		---287/200
69.5%
1.44
.441/.329
Brodix -18 KC SP C 18 Deg Alum254/-2.18/1.62556-163/119
73%		232/172
74.1%
62.2/82.9
184/246
.773/.769
477 hp		288/214
74.3%
77.2/103
229/306
.72/.718
592 hp
643		335/233
69.6%
89.8/112
266/333
.67/.625
689 hp
748		351/242
68.9%
94/117
279/346
.585/.541
722 hp
783
881		360/250
69.4%
96.4/121
286/357
.514/.479
741 hp
803
904		---288/205
71.1%
1.42
.441/.329
Brodix -18 WP SP C AP 18 Deg CNC Alum266/-2.18/1.62556-154/134
87%		224/175
78.1%
60/84.4
178/250
.747/.783
461 hp		278/241
86.7%
74.5/116
221/344
.695/.808
572 hp
620		328/261
79.6%
87.9/126
260/373
.656/.70
675 hp
732		369/270
73.2%
98.9/130
293/386
.615/.604
759 hp
824
926		395/274
69.4%
106/132
314/391
.564/.525
813 hp
882
991		---291/226
77.5%
1.48
.441/.329
Brodix 18 Deg Busch Ported ET Performance Alum257/-2.15/1.60
4.03		52.574/49
66.2%		159/114
71.7%		231/177
76.6%
63.6/88
189/261
.781/.804
475 hp		288/219
76%
79.3/109
235/323
.73/.746
592 hp
643		323/238
73.7%
89/118
264/351
.655/.649
664 hp
721		340/246
72.4%
93.7/122
277/363
.575/.559
699 hp
759
853		----268/199
74.1%
1.32
.435/.324
Brodix 18 Deg Ported ET Performance Alum260/-2.14/1.60
4.155		52.571/54
76.1%		143/106
74.1%		220/159
72.3%
61.2/79.1
181/234
.747/.722
453 hp		283/213
75.3%
78.7/106
233/314
.721/.726
582 hp
632		326/239
73.3%
90.6/119
269/352
.664/.651
671 hp
728		349/251
71.9%
97/125
287/370
.593/.57
718 hp
779
876		356/257
72.2%
99/128
293/379
.518/.50
732 hp
795
894		362/264
72.9%
101/131
298/389
.461/.45
745 hp
808
909		--291/213
73%
1.39
.433/.324
Brodix 18 Deg CNC Rons Porting Service 262 Alum262/-2.18/1.62553-156/129
82.7%		225/188
83.6%
60.3/90.6
179/269
.75/.841
463 hp		281/232
82.6%
75.3/112
223/331
.703/.778
578 hp
627		331/243
73.4%
88.7/117
263/347
.662/.652
681 hp
739		350/248
70.9%
93.8/120
278/354
.583/.555
720 hp
781
878		360/250
69.4%
96.4/121
286/357
.514/.479
741 hp
803
904		362/252
69.6%
97/122
287/360
.453/.423
745 hp
808
909		--295/220
74.7%
1.38
.441/.329
Brodix 18 Deg CNC Rons Porting Service 278 Alum278/-2.18/1.62553-150/125
83.3%		220/180
81.8%
58.9/86.8
175/257
.733/.805
453 hp		281/224
79.7%
75.3/108
223/320
.703/.751
578 hp
627		331/240
72.5%
88.7/116
263/343
.662/.644
681 hp
739		362/248
68.5%
97/120
287/354
.603/.555
745 hp
808
909		380/251
66.1%
102/121
302/359
.543/.481
782 hp
848
954		385/254
66%
103/122
306/363
.481/.426
792 hp
859
966		--301/217
72.2%
1.38
.441/.329
Brodix 18 Deg CNC AP Alum266/-2.18/1.62557-154/113
73.4%		224/162
72.3%
60/78.1
178/231
.747/.724
461 hp		278/224
80.6%
74.5/108
221/320
.695/.751
572 hp
620		328/241
73.5%
87.9/116
260/344
.656/.647
675 hp
732		369/248
67.2%
98.9/120
293/354
.615/.555
759 hp
824
926		395/254
64.3%
106/122
314/363
.564/.487
813 hp
882
991		---291/207
71.1%
1.48
.441/.329
Brodix Track 1 Alum CHPN/A2.08/1.60N/A60/48
80%		115/106
92.2%		166/147
88.6%
48.9/73.1
145/217
.58/.668
341 hp		209/178
85.2%
61.5/88.5
182/262
.548/.606
430 hp
466		246/191
77.6%
72.4/95
215/281
.516/.521
506 hp
549		267/200
74.9%
78.6/99.5
233/295
.466/.454
549 hp
596
670		----201/164
82%
-
.421/.324
Brodix Track 1 Alum215/-2.08/1.6069-128/111
86.7%		183/149
81.4%
53.9/74.1
160/220
.639/.677
376 hp		229/179
78.2%
67.4/89
200/264
.60/.61
471 hp
511		268/193
72%
78.9/96
234/284
.562/.526
551 hp
598		269/207
77%
79.2/103
235/305
.47/.47
553 hp
600
675		----215/168
77.9%
1.25
.421/.324
Brodix Track 1 227 CNC Out of Box Weingartner Racing227/-2.08/1.60
4.125
No Pipe		N/A70/58
82.9%		146/114
78.1%		214/163
76.2%
63/81.1
187/240
.748/.74
440 hp		268/205
76.5%
78.9/102
234/302
.702/.698
551 hp
598		298/221
74.2%
87.7/110
260/326
.625/.602
613 hp
665		312/227
72.8%
91.8/113
272/335
.545/.516
642 hp
696
783		318/235
73.9%
93.6/117
277/346
.476/.457
654 hp
710
798		---259/194
74.9%
1.40
.421/.324
Brodix Track 1 23 Deg Ported Alum215/-2.08/1.6068-147/110
74.8%		213/142
66.7%
62.7/70.6
186/209
.744/.645
438 hp		258/180
69.8%
75.9/89.5
225/265
.676/.613
531 hp
576		288/213
74%
84.8/106
251/314
.604/.58
592 hp
643		290/225
77.6%
85.3/112
253/332
.507/.511
597 hp
647
728		294/231
78.6%
86.5/115
256/340
.44/.45
605 hp
656
738		---248/184
73.9%
1.37
.421/.324
Brodix Track 1 23 Deg CNC M2 Race Systems Alum215/-2.08/1.60
4.03		68-151/116
76.8%		219/150
68.5%
64.5/74.6
191/221
.765/.681
451 hp		263/185
70.3%
77.4/92
229/273
.689/.63
541 hp
587		291/208
71.5%
85.6/103
254/307
.61/.567
599 hp
649		294/219
74.5%
86.5/109
256/323
.514/.497
605 hp
656
738		296/227
76.7%
87.1/113
258/335
.443/.442
609 hp
661
743		---252/184
73%
1.38
.421/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix Track 1 23 Deg CNC M2 Race Systems Alum227/-2.08/1.60
4.125		68-145/116
80%		207/150
72.5%
60.9/74.6
181/221
.723/.681
426 hp		260/185
71.2%
76.5/92
227/273
.681/.63
535 hp
580		297/208
70%
87.4/103
259/307
.623/.567
611 hp
663		305/219
71.8%
89.8/109
266/323
.533/.497
627 hp
681
766		309/227
73.5%
90.9/113
269/335
.463/.442
636 hp
690
776		---254/184
72.6%
1.36
.421/.324
Brodix Track 1 23 Deg Alum221/-2.08/1.6067-124/103
83.1%		179/138
77.1%
52.7/68.6
156/203
.625/.627
368 hp		228/164
71.9%
67.1/81.6
199/242
.597/.559
469 hp
509		264/178
67.4%
77.7/88.5
230/262
.553/.485
543 hp
589		276/186
67.4%
81.2/92.5
241/274
.482/.422
568 hp
616
693		279/190
68.1%
82.1/94.5
243/280
.418/.37
574 hp
623
700		---225/160
71%
1.26
.421/.324
Brodix Track 1 23 Deg Ported BHPerformace AlumN/A-
-
No Pipe		N/A68/60
88.2%		134/115
85.8%		198/162
81.8%
-
407 hp		257/192
74.7%
-
529 hp
574		301/206
68.4%
-
619 hp
672		318/218
68.6%
-
654 hp
710
798		330/227
68.8%
-
679 hp
737
828		---256/187
72.8%
Brodix Track 1X 23 Deg 40/60 Alum222/-2.10/1.6068-152/113
74.3%		213/152
71.4%
61.5/75.6
182/224
.737/.69
438 hp		262/173
66%
75.6/86
224/255
.68/.589
539 hp
585		285/185
64.9%
82.3/92
244/273
.592/.504
586 hp
636		287/192
66.9%
82.9/95.5
246/283
.497/.436
590 hp
641
720		292/195
66.8%
84.3/97
250/287
.433/.38
601 hp
652
733		---249/168
67.7%
1.32
.425/.324
Brodix Track 1X 23 Deg CNC 40/60 Rons Porting Service Alum236/-2.125/1.6069-155/119
76.8%		224/163
72.8%
63.2/81.1
187/240
.766/.74
461 hp		279/194
69.5%
78.7/96.5
233/286
.716/.661
574 hp
623		308/210
68.2%
86.8/104
257/309
.632/.572
634 hp
687		326/226
69.3%
91.9/112
272/333
.557/.513
671 hp
728
818		331/235
71%
93.3/117
277/346
.485/.457
681 hp
739
831		333/242
72.7%
93.9/120
278/357
.427/.412
685 hp
743
836		--279/198
71%
1.41
.430/.324
Brodix Track 1 40/60 Valve Spacing 23 Deg AlumN/A2.125/1.60N/A-138/106
76.8%		199/145
72.9%
56.1/72.1
166/214
.681/.659
409 hp		253/182
71.9%
71.3/90.5
211/268
.649/.62
520 hp
565		294/209
71.1%
82.9/104
246/308
.603/.57
605 hp
656		318/224
70.4%
89.7/111
266/330
.544/.509
654 hp
710
798		325/233
71.7%
91.6/116
272/343
.476/.454
669 hp
725
816		---255/183
72%
-
.430/.324
Brodix STS Track 1 23 Deg Alum2150-2.08/1.6068-150/116
77.3%		213/150
70.4%
62.7/74.6
186/221
.744/.681
438 hp		258/185
71.7%
75.9/92
225/273
.676/.63
531 hp
576		285/208
73%
83.9/103
249/307
.597/.567
586 hp
636		303/219
72.3%
89.2/109
264/323
.529/.497
623 hp
676
760		305/227
74.4%
89.8/113
266/335
.457/.442
627 hp
681
766		---252/184
73%
-
.421/.324
Brodix KC Track 1 23 Deg Alum227/-2.08/1.6068-154/116
75.3%		223/150
67.3%
65.6/74.6
194/221
.779/.681
459 hp		270/185
68.5%
79.5/92
235/273
.708/.63
555 hp
603		303/208
68.6%
89.2/103
264/307
.635/.567
623 hp
676		312/219
70.2%
91.8/109
272/323
.545/.497
642 hp
696
783		316/227
71.8%
93/113
276/335
.473/.442
650 hp
705
793		---263/184
70%
1.39
.421/.324
Brodix KC 13 Deg Ported Alum283/-2.18/1.62547-159/113
71.1%		239/164
68.6%
64/79.1
190/234
.797/.733
492 hp		307/213
69.4%
82.2/103
244/304
.768/.714
632 hp
685		352/236
67%
94.3/114
279/337
.704/.633
724 hp
786		359/247
68.8%
96.2/119
285/353
.598/.552
739 hp
801
901		364/258
70.9%
97.5/124
289/369
.52/.494
749 hp
812
914		370/263
71.1%
99.1/127
294/376
.463/.441
761 hp
826
929		--307/213
69.5%
1.31
.441/.329
Brodix JJ 180 23 Deg Alum180/-2.02/1.6067-138/97
70.3%		194/129
66.5%
60.5/64.2
179/190
.698/.586
399 hp		234/155
66.2%
73/77.1
216/228
.631/.528
481 hp
522		243/171
70.4%
75.8/85
225/252
.525/.466
500 hp
542		245/179
73.1%
76.4/89
227/264
.441/.407
504 hp
547
615		----211/146
69.4%
1.36
.409/.324
Brodix JJ 200 23 Deg Alum200/-2.05/1.6067-125/97
77.6%		182/129
70.9%
55.1/64.2
163/190
.645/.586
374 hp		227/155
68.3%
68.8/77.1
204/228
.604/.528
467 hp
507		260/171
65.8%
78.8/85
233/252
.553/.466
535 hp
580		266/179
67.3%
80.6/89
239/264
.471/.407
547 hp
594
668		----212/146
69%
1.33
.415/.324
Brodix JJ 210 CNC 23 Deg Alum210/-2.08/1.6076-148/110
74.3%		217/166
76.5%
63.9/82.6
189/245
.758/.754
446 hp		260/200
76.9%
76.5/99.5
227/295
.681/.681
535 hp
580		278/214
77%
81.8/106
242/315
.583/.583
572 hp
620		284/219
77.1%
83.6/109
248/323
.496/.497
584 hp
634
713		287/224
78%
84.5/111
250/330
.43/.436
590 hp
641
720		---246/189
76.9%
1.37
.421/.324
Brodix IK 180 23 Deg Alum180/-2.02/1.6064/70-138/112
81.2%		188/149
79.3%
58.7/74.1
174/220
.676/.677
387 hp		234/167
71.4%
73/83.1
216/246
.631/.569
481 hp
522		243/175
72%
75.8/87
225/258
.525/.477
500 hp
542		245/178
72.7%
76.4/88.5
227/262
.441/.404
504 hp
547
615		----210/156
74.5%
1.36
.409/.324
Brodix IK 200 23 Deg Alum200/-2.02/1.6064/70-123/100
81.3%		181/145
80.1%
56.5/72.1
167/214
.651/.659
372 hp		230/164
71.3%
71.8/81.6
213/242
.621/.559
473 hp
513		253/171
67.6%
78.9/85
234/252
.546/.466
520 hp
565		261/176
67.4%
81.4/87.5
241/259
.469/.40
537 hp
583
655		262/177
67.6%
81.8/88
242/261
.404/.345
539 hp
585
658		---218/156
71.2%
1.31
.409/.324
Brodix IK 210 23 Deg Ported Alum210/-2.08/1.6075-148/110
74.3%		217/166
76.5%
63.9/82.6
189/245
.758/.754
446 hp		260/200
76.9%
76.5/99.5
227/295
.681/.681
535 hp
580		278/214
77%
81.8/106
242/315
.583/.583
572 hp
620		284/219
77.1%
83.6/109
248/323
.496/.497
584 hp
634
713		287/224
78%
84.5/111
250/330
.43/.436
590 hp
641
720		---246/189
76.9%
1.37
.421/.324
Brodix RR 180 23 Deg Alum180/-2.02/1.6064/67-138/97
70.3%		194/129
66.5%
60.5/64.2
179/190
.698/.586
399 hp		234/155
66.2%
73/77.1
216/228
.631/.528
481 hp
522		243/171
70.4%
75.8/85
225/252
.525/.466
500 hp
542		245/179
73.1%
76.4/89
227/264
.441/.407
504 hp
547
615		----211/146
69.4%
1.36
.409/.324
Brodix RR 200 23 Deg Alum200/-2.055/1.6064/67-125/97
77.6%		182/129
70.9%
54.9/64.2
163/190
.644/.586
374 hp		227/155
68.3%
68.4/77.1
203/228
.602/.528
467 hp
507		260/171
65.8%
78.4/85
232/252
.552/.466
535 hp
580		266/179
67.3%
80.2/89
238/264
.47/.407
547 hp
594
668		----212/146
69%
1.33
.416/.324
Brodix RR 200 23 Deg CNC CC Alum200/-2.055/1.6064/67-141/113
80.1%		221/153
69.2%
66.6/76.1
197/225
.782/.695
455 hp		242/171
70.7%
73/85
216/252
.642/.583
498 hp
540		265/179
67.5%
79.9/89
237/264
.562/.488
545 hp
591		272/183
67.3%
82/91
243/270
.481/.416
560 hp
607
683		----228/160
70%
1.36
.416/.324
Brodix CV SP 265 Alum265/-2.20/1.6054-159/109
68.6%		232/145
62.5%
61/72.1
181/214
.766/.659
477 hp		293/188
64.2%
77.1/93.5
228/277
.726/.64
603 hp
654		347/221
63.7%
91.3/110
270/326
.688/.602
714 hp
774		379/237
62.5%
99.7/118
295/349
.626/.538
780 hp
846
951		395/244
61.8%
104/121
308/360
.559/.475
813 hp
882
991		---301/191
63.4%
1.49
.446/.324
Brodix 13 Deg CNC Jones Engineering Alum282/-2.18/1.6043-158/110
69.6%		234/156
66.7%
62.7/77.6
186/230
.78/.709
481 hp		302/219
72.5%
80.9/109
240/323
.755/.746
621 hp
674		349/243
69.6%
93.5/121
277/358
.698/.662
718 hp
779		371/260
70.1%
99.4/129
295/383
.618/.59
763 hp
828
931		377/267
70.8%
101/133
299/393
.539/.52
776 hp
841
946		385/271
70.4%
103/135
306/399
.481/.462
792 hp
859
966		--311/218
70.1%
1.37
.441/.324
Brodix BD 1000 12 Deg 275 Weld Tech Alum275/-2.15/1.6067-166/112
67.5%		236/156
66.1%
65/77.6
193/230
.798/.709
485 hp		293/188
64.2%
80.7/93.5
239/277
.743/.64
603 hp
654		333/237
71.2%
91.7/118
272/349
.675/.646
685 hp
743		344/249
72.4%
94.8/124
281/367
.581/.565
708 hp
768
863		346/255
73.7%
95.3/127
282/376
.501/.496
712 hp
772
868		---286/200
69.7%
1.26
.435/.324
Brodix BD 1000 12 Deg 286 Weld Tech Alum286/-2.18/1.6067-154/112
72.7%		228/156
68.4%
61.1/77.6
181/230
.76/.709
469 hp		289/188
65.1%
77.4/93.5
229/277
.723/.64
595 hp
645		334/237
71%
89.5/118
265/349
.668/.646
687 hp
745		357/249
69.7%
95.6/124
283/367
.595/.565
734 hp
797
896		360/255
70.8%
96.4/127
286/376
.514/.496
741 hp
803
904		---287/200
69.5%
1.26
.441/.324
Brodix BD 1010 12 / 13.5 Deg CNC Alum299/-2.20/1.6064-152/117
77%		229/162
70.7%
60.2/80.6
178/239
.756/.736
471 hp		292/220
75.3%
76.8/109
228/324
.723/.749
601 hp
652		343/245
71.4%
90.2/122
267/361
.68/.668
706 hp
766		375/255
68%
98.6/127
292/376
.619/.579
771 hp
837
941		388/260
67%
102/129
302/383
.549/.506
798 hp
866
974		---297/210
70.8%
1.30
.446/.324
Brodix BD 1010 12 Deg CNC Jones Engineering Alum282/-2.18/1.6044-153/110
71.9%		231/162
70.1%
61.9/80.6
183/239
.77/.736
475 hp		295/221
74.9%
79/110
234/326
.738/.753
607 hp
658		342/243
71.1%
91.6/121
271/358
.684/.662
704 hp
763		370/252
68.1%
99.1/125
294/371
.617/.572
761 hp
826
929		392/258
65.8%
105/128
311/380
.56/.502
806 hp
875
984		399/261
65.4%
107/130
317/385
.499/.445
821 hp
891
1001		--312/215
69.1%
1.41
.441/.324
Brodix BD 2000 12 / 13.5 Deg CNC Alum285/-2.20/1.5874-157/109
69.4%		238/152
63.9%
62.6/77.5
186/230
.786/.699
490 hp		302/205
67.9%
79.4/105
235/310
.748/.707
621 hp
674		353/232
65.7%
92.9/118
275/351
.70/.64
726 hp
788		381/241
63.3%
100/123
297/364
.629/.554
784 hp
850
956		399/250
62.7%
105/128
311/378
.565/.493
821 hp
891
1001		---305/198
65%
1.40
.446/.320
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix BD 2000 CNC Out of Box - Darin Morgan SF600 AlumN/A2.20/1.60
-
No Pipe		N/A-168/104
61.9%		237/141
59.5%
62.3/70.1
185/208
.783/.64
488 hp		301/194
64.5%
79.2/96.5
235/286
.746/.661
619 hp
672		344/223
64.8%
90.5/111
268/329
.682/.608
708 hp
768		377/237
62.9%
99.2/118
294/349
.623/.538
776 hp
841
946		400/241
60.3%
105/120
312/355
.566/.469
823 hp
893
1004		397/242
61%
104/120
309/357
.492/.412
817 hp
886
996		381/244
64%
100/121
297/360
.42/.369
784 hp
850
956		380/245
64.5%
100/122
296/361
.377/.334
782 hp
848
954		332/208
62.7%
-
.446/.324
Brodix BD 2000 Ported TEA Alum285/--N/A73/59
80.8%		159/115
72.3%		230/187
81.3%
-
473 hp		290/254
87.6%
-
597 hp
647		342/277
81%
-
704 hp
763		371/289
77.9%
-
763 hp
828
931		391/295
75.4%
-
804 hp
873
981		399/301
75.4%
-
821 hp
891
1001		--312/245
78.7%
1.40
Brodix BD 2300 13.5 Deg CNC Alum311/-2.23/1.6049-150/113
75.3%		223/164
73.5%
57.1/81.6
169/242
.727/.745
459 hp		275/219
79.6%
70.4/109
209/323
.672/.746
566 hp
614		331/246
74.3%
84.7/122
251/363
.647/.67
681 hp
739		382/256
67%
97.8/127
290/377
.622/.581
786 hp
853
959		401/260
64.8%
103/129
304/383
.56/.506
825 hp
895
1006		417/267
64%
107/133
316/393
.51/.455
858 hp
931
1047		--311/218
70%
1.34
.452/.324
Brodix BD 2300 13.5 Deg CNC Jones Engineering Alum312/-2.20/1.6049-137/113
82.5%		226/164
72.6%
59.5/81.6
176/242
.747/.745
465 hp		304/219
72%
80/109
237/323
.753/.746
625 hp
679		363/246
67.8%
95.5/122
283/363
.719/.67
747 hp
810		394/256
65%
104/127
307/377
.651/.581
811 hp
879
989		410/262
63.9%
108/130
320/386
.58/.51
843 hp
915
1029		421/267
63.4%
111/133
328/393
.522/.455
866 hp
940
1057		--322/218
67.7%
1.35
.446/.324
Brodix DR 1213 12.5 / 13.5 Deg CNC Jones Engineering Alum315/-2.23/1.6049-141/105
74.5%		221/159
71.9%
56.6/79.1
168/234
.72/.722
455 hp		295/210
71.2%
75.5/104
224/309
.721/.715
607 hp
658		351/237
67.5%
89.9/118
266/349
.686/.646
722 hp
783		396/252
63.6%
101/125
300/371
.645/.572
815 hp
884
994		421/262
62.2%
108/130
319/386
.588/.51
866 hp
940
1057		435/268
61.6%
111/133
330/395
.532/.456
895 hp
971
1092		--323/213
66.1%
1.38
.452/.324
Brodix GB 2000 WP 286 13.5 Deg CNC Alum286/-2.20/1.5876-157/109
69.4%		238/152
63.9%
62.6/77.5
186/230
.786/.699
490 hp		302/205
67.9%
79.4/105
235/310
.748/.707
621 hp
674		353/232
65.7%
92.9/118
275/351
.70/.64
726 hp
788		381/241
63.3%
100/123
297/364
.629/.554
784 hp
850
956		399/250
62.7%
105/128
311/378
.565/.493
821 hp
891
1001		---305/198
65%
1.40
.446/.320
Brodix GB 2000 13.5 Deg Ported TEA Alum285/--N/A78/59
75.6%		170/115
67.6%		244/187
76.6%
-
502 hp		304/254
83.6%
-
625 hp
679		349/277
79.4%
-
718 hp
779		375/289
77.1%
-
771 hp
837
941		387/295
76.2%
-
796 hp
864
971		399/301
75.4%
-
821 hp
891
1001		--318/245
77.1%
1.40
Brodix GB 2200 WP 282 13.5 Deg CNC Alum282/-2.20/1.5876-150/104
69.3%		223/158
70.9%
58.7/80.6
174/239
.737/.727
459 hp		286/210
73.4%
75.2/107
223/317
.709/.724
588 hp
638		336/235
69.9%
88.4/120
262/355
.666/.649
691 hp
750		368/246
66.8%
96.8/125
287/372
.608/.566
757 hp
821
924		383/252
65.8%
101/129
299/381
.542/.497
788 hp
855
961		---291/201
69%
1.36
.446/.320
Brodix GB 2200 WP 282 + 30 13.5 Deg CNC Alum282/-2.20/1.5876-150/104
69.3%		224/158
70.5%
58.9/80.6
175/239
.74/.727
461 hp		289/210
72.7%
76/107
225/317
.716/.724
595 hp
645		337/235
69.7%
88.7/120
263/355
.668/.649
693 hp
752		371/246
66.3%
97.6/125
289/372
.613/.566
763 hp
828
931		396/252
63.6%
104/129
309/381
.561/.497
815 hp
884
994		---295/201
68.2%
1.40
.446/.320
Brodix GB 2200 13.5 Deg 282 CNC Jones Engineering Alum282/-2.20/1.5869-150/104
69.3%		223/158
70.9%
58.7/80.6
174/239
.737/.727
459 hp		286/210
73.4%
75.2/107
223/317
.709/.724
588 hp
638		336/235
69.9%
88.4/120
262/355
.666/.649
691 hp
750		368/246
66.8%
96.8/125
287/372
.608/.566
757 hp
821
924		383/252
65.8%
101/129
299/381
.542/.497
788 hp
855
961		---291/201
69%
1.36
.446/.320
Brodix GB 2200 13.5 Deg 293 CNC Jones Engineering Alum293/-2.20/1.5869-152/104
68.4%		228/158
69.3%
60/80.6
178/239
.753/.727
469 hp		292/210
71.9%
76.8/107
228/317
.723/.724
601 hp
652		339/235
69.3%
89.2/120
264/355
.672/.649
697 hp
757		373/246
66%
98.1/125
291/372
.616/.566
767 hp
833
936		390/252
64.6%
103/129
304/381
.552/.497
802 hp
870
979		---296/201
67.9%
1.33
.446/.320
Brodix GB 2300 WP 309 13.5 Deg CNC Alum309/-2.20/1.5876-153/100
65.4%		231/151
65.4%
60.8/77
180/228
.763/.695
475 hp		286/216
75.5%
75.2/110
223/326
.709/.745
588 hp
638		342/243
71.1%
90/124
267/367
.678/.671
704 hp
763		374/250
66.8%
98.4/128
292/378
.618/.575
769 hp
835
939		394/253
64.2%
104/129
307/382
.558/.499
811 hp
879
989		---297/202
68.1%
1.28
.446/.320
Brodix GB 2300 13.5 Deg CNC Race Flow Development AlumN/A2.22/1.6048-188/140
74.5%		255/170
66.7%
65.9/84.6
195/251
.835/.772
525 hp		312/240
76.9%
80.6/119
239/354
.766/.818
642 hp
696		357/255
71.4%
92.2/127
273/376
.701/.695
734 hp
797		399/280
70.2%
103/139
305/413
.653/.636
821 hp
891
1001		418/284
67.9%
108/141
320/419
.586/.553
860 hp
933
1049		430/289
67.2%
111/144
329/426
.528/.492
885 hp
960
1079		439/290
66.1%
113/144
336/427
.479/.439
903 hp
980
1102		-350/244
69.6%
-
.450/.324
Brodix GB 2300 13.5 Deg CNC M2 Race Systems Alum317/-2.20/1.58
4.155		4674/63
85.1%		167/135
80.8%		225/186
82.7%
59.2/94.9
175/281
.743/.856
463 hp		280/224
80%
73.7/114
218/339
.694/.773
576 hp
625		327/240
73.4%
86/122
255/363
.648/.662
673 hp
730		364/244
67%
95.8/124
284/369
.601/.561
749 hp
812
914		388/245
63.1%
102/125
302/370
.549/.483
798 hp
866
974		401/245
61.1%
105/125
313/370
.497/.423
825 hp
895
1006		--307/217
70.6%
1.26
.446/.320
Brodix GB 2300 13.5 Deg 309 CNC Jones Engineering Alum309/-2.20/1.5849-153/100
65.4%		231/151
65.4%
60.8/77
180/228
.763/.695
475 hp		286/216
75.5%
75.2/110
223/326
.709/.745
588 hp
638		342/243
71.1%
90/124
267/367
.678/.671
704 hp
763		374/250
66.8%
98.4/128
292/378
.618/.575
769 hp
835
939		394/253
64.2%
104/129
307/382
.558/.499
811 hp
879
989		---297/202
68.1%
1.28
.446/.320
Brodix GB 2300 13.5 Deg 311 CNC Jones Engineering Alum311/-2.20/1.5849-155/121
78.1%		234/177
75.6%
61.6/90.3
182/267
.773/.814
481 hp		296/232
78.4%
77.9/118
231/351
.733/.80
609 hp
661		344/245
71.2%
90.5/125
268/370
.682/.676
708 hp
768		380/252
66.3%
100/129
296/381
.628/.58
782 hp
848
954		395/256
64.8%
104/131
308/387
.559/.505
813 hp
882
991		---301/214
71.1%
1.27
.446/.320
Brodix GB 2300 13.5 Deg 311 CNC Jones Engineering Alum311/-2.23/1.6049-150/113
75.3%		223/164
73.5%
57.1/81.6
169/242
.727/.745
459 hp		275/219
79.6%
70.4/109
209/323
.672/.746
566 hp
614		331/246
74.3%
84.7/122
251/363
.647/.67
681 hp
739		382/256
67%
97.8/127
290/377
.622/.581
786 hp
853
959		401/262
65.3%
103/130
304/386
.56/.51
825 hp
895
1006		417/267
64%
107/133
316/393
.51/.455
858 hp
931
1047		--311/218
70.1%
1.34
.452/.324
Brodix GB 2400 WP 13.5 Deg CNC Alum325/-2.20/1.5853-----------
-
-
.446/.320
Brodix GB 2500 13.5 Deg CNC MBE Dirt AlumN/A2.20/1.60
-
No Pipe		N/A63/48
76.2%		138/101
73.2%		214/146
68.2%
56.3/72.6
167/215
.707/.663
440 hp		284/197
69.4%
74.7/98
221/290
.704/.671
584 hp
634		342/231
67.5%
90/115
267/340
.678/.63
704 hp
763		388/251
64.7%
102/125
302/370
.641/.57
798 hp
866
974		411/261
63.5%
108/130
320/385
.582/.508
845 hp
917
1032		419/270
64.4%
110/134
327/398
.519/.46
862 hp
935
1052		422/272
64.5%
111/135
329/401
.465/.412
868 hp
942
1059		425/271
63.8%
112/135
331/399
.421/.369
874 hp
949
1067		338/222
65.7%
-
.446/.324
Brodix GB 2500 13.5 Deg CNC MBE I-55 E-55 SF600 Alum319/-2.23/1.60
4.155
No Pipe		N/A-133/98
73.7%		223/146
65.5%
57.1/72.6
169/215
.727/.663
459 hp		300/188
62.7%
76.8/93.5
228/277
.733/.64
617 hp
670		357/220
61.6%
91.4/109
271/324
.698/.60
734 hp
797		401/248
61.8%
103/123
304/365
.653/.563
825 hp
895
1006		430/260
60.5%
110/129
326/383
.601/.506
885 hp
960
1079		445/270
60.7%
114/134
338/398
.544/.46
915 hp
993
1117		446/273
61.2%
114/136
338/402
.484/.413
917 hp
995
1119		-342/213
62.3%
1.40
.452/.324
Brodix GB 2500 12.5 / 13.5 Deg CNC Race Flow Development Alum318/-2.25/1.6042-180/155
86.1%		258/202
78.3%
64.9/100
192/298
.833/.918
531 hp		314/246
78.3%
79/122
234/363
.761/.838
646 hp
701		360/276
76.7%
90.5/137
268/407
.698/.752
741 hp
803		410/283
69%
103/141
306/417
.662/.643
843 hp
915
1029		421/286
67.9%
106/142
314/421
.583/.557
866 hp
940
1057		433/288
66.5%
109/143
323/424
.524/.491
891 hp
966
1087		446/290
65%
112/144
332/427
.48/.439
917 hp
995
1119		-353/253
71.8%
1.40
.456/.324
Brodix Canted Valve Ported Bullet Cylinder Heads AlumN/A2.20/1.60N/A80/92
115%		161/163
101%		228/206
90.4%
60/102
178/304
.753/.936
469 hp		283/219
77.4%
74.4/109
221/323
.701/.746
582 hp
632		332/223
67.2%
87.3/111
259/329
.658/.608
683 hp
741		366/235
64.2%
96.3/117
285/346
.605/.534
753 hp
817
919		389/240
61.7%
102/119
303/354
.551/.467
800 hp
868
976		401/255
63.6%
105/127
313/376
.497/.434
825 hp
895
1006		411/260
63.3%
108/129
320/383
.453/.394
845 hp
917
1032		-321/225
70.1%
-
.446/.324
Canfield CCM Alum195/-2.02/1.607261/51
83.6%		128/103
80.5%		191/143
74.9%
59.6/71.1
177/211
.687/.65
393 hp		238/170
71.4%
74.3/84.6
220/251
.642/.579
490 hp
531		271/189
69.7%
84.6/94
251/279
.585/.515
557 hp
605		254/200
78.7%
79.3/99.5
235/295
.457/.454
523 hp
567
637		----216/161
74.4%
1.39
.409/.324
Canfield 23-500-65 SF600 Alum195/-2.055/1.60
4.03
1 3/4" Pipe		6572/53
73.6%		145/107
73.8%		201/143
71.1%
60.6/71.1
180/211
.711/.65
413 hp		247/175
70.9%
74.5/87
221/258
.655/.596
508 hp
551		258/190
73.6%
77.8/94.5
230/280
.547/.518
531 hp
576		259/200
77.2%
78.1/99.5
231/295
.458/.454
533 hp
578
650		259/203
78.4%
78.1/101
231/299
.393/.395
533 hp
578
650		---228/170
74.4%
1.33
.416/.324
Canfield 23-550-65 Alum215/-2.08/1.60
4.125
Pipe		N/A62/43
69.4%		141/112
79.4%		207/152
73.4%
60.9/75.6
181/224
.723/.69
426 hp		255/173
67.8%
75/86
222/255
.668/.589
525 hp
569		270/184
68.1%
79.5/91.5
235/271
.566/.501
555 hp
603		279/195
69.9%
82.1/97
243/287
.487/.443
574 hp
623
700		283/213
75.3%
83.3/106
247/314
.424/.415
582 hp
632
710		---239/172
71.7%
1.32
.421/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Canfield 23-550-65 Alan / Burtonsville Performance Out of Box SF600 Alum215/-2.08/1.60
4.25
No Pipe		N/A-/50-/992-/152-/149-/157-/161-/164-/172---
-
-
.421/.324
Canfield 23-550-65 Minor Pocket Porting Alan / Burtonsville Performance SF600 Alum215/-2.08/1.60
4.25
No Pipe		N/A-/53-/104-/162-/196-/199-/197-/197-/194---
-
-
.421/.324
Canfield 23-600-65 Alum220/-2.08/1.60
-
No Pipe		6572/52
72.2%		145/105
72.4%		206/146
70.9%
60.6/72.6
180/215
.72/.663
424 hp		252/184
73%
74.2/91.5
220/271
.66/.627
518 hp
562		288/203
70.5%
84.8/101
251/299
.604/.553
592 hp
643		302/219
72.5%
88.9/109
263/323
.528/.497
621 hp
674
758		306/227
74.2%
90.1/113
267/335
.458/.442
629 hp
683
768		---250/181
72.3%
1.39
.421/.324
CGM Motorsports 200 23 Deg CNC SF1020 Alum200/-2.02/1.60N/A64/57
89.1%		114/101
88.6%		161/128
79.5%
50.2/63.7
149/189
.579/.581
331 hp		201/152
75.6%
62.7/75.6
186/224
.542/.518
413 hp
449		232/159
68.5%
72.4/79.1
214/234
.501/.433
477 hp
518		251/169
67.3%
78.3/84.1
232/249
.452/.384
516 hp
560
630		----192/142
73.9%
1.26
.409/.324
CGM Motorsports 210 23 Deg CNC SF1020 Alum210/-2.02/1.60N/A71/57
80.3%		146/101
69.2%		204/157
77%
63.7/78.1
189/231
.734/.713
420 hp		250/177
70.8%
78/88
231/261
.675/.603
514 hp
558		261/186
71.3%
81.4/92.5
241/274
.563/.507
537 hp
583		266/190
71.4%
83/94.5
246/280
.478/.431
547 hp
594
668		276/195
70.7%
86.1/97
255/287
.426/.38
568 hp
616
693		---234/168
71.7%
1.31
.409/.324
Competition Products Alum CHP195/602.02/1.606759/50
84.7%		112/91
81.3%		152/122
80.3%
47.4/60.7
141/180
.547/.554
313 hp		194/152
78.4%
60.5/75.6
179/224
.523/.518
399 hp
433		231/167
72.3%
72.1/83.1
214/246
.499/.455
475 hp
516		256/172
67.2%
79.9/85.5
237/253
.461/.391
527 hp
571
643		----189/141
74.5%
1.31/2.87
.409/.324
Dart 165 Iron165/-1.94/1.5067-126/108
85.7%		185/128
69.2%
62.6/72.4
185/215
.693/.62
381 hp		221/136
61.5%
74.8/77
222/228
.621/.494
455 hp
493		232/138
59.5%
78.5/78.1
233/231
.521/.401
477 hp
518		-----191/128
66.8%
1.41
.393/.304
Dart 165 Iron Eagle165/651.94/1.50
4.03
No Pipe		72----210/138
65.7%
71/78.1
211/231
.472/.401
432 hp
469		------
-
1.27/2.12
.393/.304
Dart 180 Iron Eagle180/752.02/1.60
4.03
No Pipe		65.9-139/114
82%		190/145
76.3%
59.3/72.1
176/214
.684/.659
391 hp		218/164
75.2%
68/81.6
202/242
.588/.559
448 hp
487		222/172
77.5%
69.3/85.5
205/253
.479/.469
457 hp
495		218/174
79.8%
68/86.5
202/256
.392/.395
448 hp
487
547		----197/154
77.9%
1.23/2.32
.409/.324
Dart 180 Iron Eagle Meaux Racing Heads Out of Box180/752.02/1.60
4.00
No Pipe		N/A-127/102
80.3%		181/137
75.7%
56.5/68.1
167/202
.651/.622
372 hp		212/161
75.9%
66.2/80.1
196/237
.572/.548
436 hp
473		218/175
80.3%
68/87
202/258
.471/.477
448 hp
487		219/180
82.2%
68.3/89.5
202/265
.394/.409
451 hp
489
550		----191/151
78.9%
1.22/2.40
.409/.324
Dart 180 Iron Eagle Tri-Mark180/752.02/1.60N/A62/63
101%		127/115
90.6%		180/147
81.7%
56.2/73.1
166/217
.648/.668
370 hp		209/163
78%
65.2/81.1
193/240
.564/.555
430 hp
466		209/168
80.4%
65.2/83.6
193/248
.451/.458
430 hp
466		209/171
81.8%
65.2/85
193/252
.376/.388
430 hp
466
525		208/176
84.6%
64.9/87.5
192/259
.321/.343
428 hp
464
522		---190/157
82.3%
1.16/2.35
.409/.324
Dart 180 Iron Eagle Ported Tri-Mark StealthN/A2.02/1.60N/A68/61
89.7%		134/112
83.6%		188/150
79.8%
58.7/74.6
174/221
.676/.681
387 hp		228/170
74.6%
71.1/84.6
211/251
.615/.579
469 hp
509		244/181
74.2%
76.1/90
226/267
.527/.493
502 hp
545		248/184
74.2%
77.4/91.5
229/271
.446/.418
510 hp
554
622		249/190
76.3%
77.7/94.5
230/280
.384/.37
512 hp
556
625		---215/165
76.5%
-
.409/.324
Dart 200 Iron Eagle200/752.02/1.60
4.03
No Pipe		65.9-129/114
88.4%		186/145
78%
58/72.1
172/214
.669/.659
383 hp		229/164
71.6%
71.5/81.6
212/242
.618/.559
471 hp
511		261/172
65.9%
81.4/85.5
241/253
.563/.469
537 hp
583		252/174
69%
78.6/86.5
233/256
.453/.395
518 hp
562
632		----211/154
72.8%
1.31/2.32
.409/.324
Dart 200 Iron Eagle Tri-Mark200/752.02/1.60N/A68/63
92.6%		134/115
85.8%		186/147
79%
58/73.1
172/217
.669/.668
383 hp		226/163
72.1%
70.5/81.1
209/240
.61/.555
465 hp
504		231/168
72.7%
72.1/83.6
214/248
.499/.458
475 hp
516		231/171
74%
72.1/85
214/252
.416/.388
475 hp
516
580		230/176
76.5%
71.8/87.5
213/259
.355/.343
473 hp
513
577		---206/157
75.9%
1.16/2.35
.409/.324
Dart 200 Iron Eagle Ported Tri-Mark StealthN/A2.02/1.60N/A70/61
87.1%		135/112
83%		194/150
77.3%
60.5/74.6
179/221
.698/.681
399 hp		232/170
73.3%
72.4/84.6
214/251
.626/.579
477 hp
518		245/181
73.9%
76.4/90
227/267
.529/.493
504 hp
547		253/184
72.7%
78.9/91.5
234/271
.455/.418
520 hp
565
635		261/190
72.8%
81.4/94.5
241/280
.402/.37
537 hp
583
655		---220/165
74.8%
-
.409/.324
Dart Iron Eagle CHPN/A2.05/1.60N/A65/59
90.8%		129/112
86.8%		182/139
76.4%
55.1/69.1
163/205
.645/.631
374 hp		226/166
73.5%
68.5/82.6
203/245
.601/.565
465 hp
504		258/178
69%
78.2/88.5
232/262
.549/.485
531 hp
576		255/187
73.3%
77.3/93
229/276
.452/.425
525 hp
569
640		----210/156
74.5%
-
.415/.324
Dart 215 Iron Eagle215/-2.055/1.60
4.03
No pipe		65.9-127/114
89.8%		178/145
81.5%
53.7/72.1
159/214
.629/.659
366 hp		216/164
75.9%
65.1/81.6
193/242
.573/.559
444 hp
482		249/172
69.1%
75.1/85.5
222/253
.528/.469
512 hp
556		268/174
64.9%
80.8/86.5
239/256
.474/.395
551 hp
598
673		----208/154
74.1%
1.25
.416/.324
Dart 230 Iron Eagle230/-2.08/1.60
4.155
No Pipe		65.9-129/115
89.1%		184/158
85.9%
54.2/78.6
160/233
.643/.718
379 hp		231/185
80.1%
68/92
201/273
.605/.63
475 hp
516		271/199
73.4%
79.8/99
236/293
.568/.542
557 hp
605		296/205
69.3%
87.1/102
258/302
.517/.466
609 hp
661
743		308/207
67.2%
90.6/103
269/305
.461/.403
634 hp
687
773		308/-
90.6
269
.404
634 hp
687
773		--247/178
-
1.34
.421/.324
Dart 230 Iron Eagle Ported Kelford CamsN/A2.08/1.60N/A73/59
80.8%		132/127
96.2%		186/171
91.9%
54.7/85
162/252
.65/.777
383 hp		239/204
85.4%
70.3/101
208/301
.626/.695
492 hp
533		275/224
81.5%
80.9/111
240/330
.576/.61
566 hp
614		312/233
74.7%
91.8/116
272/343
.545/.529
642 hp
696
783		319/239
74.9%
93.9/119
278/352
.478/.465
656 hp
712
801		---244/200
81.9%
-
.421/.324
Dart 230 Iron Eagle Out of Box Steve SF600230/-2.08/1.60N/A64/46
71.9%		132/95
72%		185/135
73%
54.4/67.1
161/199
.646/.613
381 hp		227/159
70%
66.8/79.1
198/234
.595/.542
467 hp
507		243/168
69.1%
71.5/83.6
212/248
.509/.458
500 hp
542		-----197/139
70.8%
1.06
.421/.324
Dart 230 Iron Eagle Ported Steve SF600N/A2.08/1.60N/A69/50
72.5%		133/102
76.7%		195/145
74.4%
57.4/72.1
170/214
.681/.659
401 hp		247/177
71.7%
72.7/88
215/261
.647/.603
508 hp
551		280/192
68.6%
82.4/95.5
244/283
.587/.523
576 hp
625		-----214/154
72%
-
.421/.324
Dart 200 Iron Eagle Platinum SF600200/-2.02/1.60
4.03
No Pipe		N/A-130/109
83.8%		194/158
81.4%
60.5/78.6
179/233
.698/.718
399 hp		242/198
81.8%
75.5/98.5
224/292
.653/.675
498 hp
540		274/208
75.9%
85.5/103
253/307
.591/.567
564 hp
612		283/214
75.6%
88.3/106
262/315
.509/.486
582 hp
632
710		-/219---225/177
79%
1.42
.409/.324
Dart 200 Iron Eagle Platinum CNC M2 Race Systems223/-2.055/1.60
4.03		N/A70/40
57.1%		151/96
63.6%		198/135
68.2%
59.7/67.1
177/199
.70/.613
407 hp		248/175
70.6%
74.8/87
222/258
.658/.596
510 hp
554		283/206
72.8%
85.3/102
253/304
.60/.561
582 hp
632		301/225
74.8%
90.8/112
269/332
.532/.511
619 hp
672
755		304/233
76.6%
91.7/116
272/343
.461/.454
625 hp
679
763		---248/178
72.1%
1.36
.416/.324
Dart 200 Iron Eagle Platinum Ported Bullet Cylinder Heads217/902.05/1.606874/63
85.1%		144/111
77.1%		203/161
79.3%
61.5/80.1
182/237
.72/.731
418 hp		247/188
76.1%
74.8/93.5
222/277
.657/.64
508 hp
551		282/209
74.1%
85.4/104
253/308
.60/.57
580 hp
629		291/218
74.9%
88.2/108
261/321
.516/.495
599 hp
649
730		301/226
75.1%
91.2/112
270/333
.457/.44
619 hp
672
755		---245/186
75.8%
1.39/2.51
.415/.324
Dart 215 Iron Eagle Platinum SF600215/752.05/1.60
4.03
No Pipe		N/A-136/109
80.1%		193/158
81.9%
58.5/78.6
173/233
.684/.718
397 hp		239/198
82.8%
72.4/98.5
215/292
.635/.675
492 hp
533		273/208
76.2%
82.7/103
245/307
.581/.567
562 hp
609		289/214
74%
87.6/106
259/315
.512/.486
595 hp
645
725		293/219
74.7%
88.8/109
263/323
.445/.426
603 hp
654
735		---237/184
77.7%
1.36/2.92
.415/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart 215 Iron Eagle Platinum CHP215/-2.055/1.606563/56
88.9%		132/106
80.3%		180/133
73.9%
54.3/66.1
161/196
.637/.604
370 hp		220/162
73.6%
66.3/80.6
197/239
.584/.552
453 hp
491		251/178
70.9%
75.7/88.5
224/262
.533/.485
516 hp
560		272/182
66.9%
82/90.5
243/268
.481/.413
560 hp
607
683		----211/152
72.1%
1.27
.416/.324
Dart 215 Iron Eagle Platinum Competition Engines SF600215/-2.055/1.60
4.03
No Pipe		N/A-130/102
78.5%		181/132
72.9%
54.6/65.7
162/195
.64/.60
372 hp		221/157
71%
66.6/78.1
197/231
.586/.535
455 hp
493		248/175
70.6%
74.8/87
222/258
.526/.477
510 hp
554		264/185
70.1%
79.6/92
236/273
.467/.42
543 hp
589
663		268/191
71.3%
80.8/95
239/281
.406/.372
551 hp
598
673		---219/157
71.8%
1.25
.416/.324
Dart 230 Iron Eagle Platinum SF600230/752.08/1.60
4.15
No Pipe		N/A-138/109
79%		201/158
78.6%
59.2/78.6
175/233
.702/.718
413 hp		247/198
80.2%
72.7/98.5
215/292
.647/.675
508 hp
551		280/208
74.3%
82.4/103
244/307
.587/.567
576 hp
625		297/214
72.1%
87.4/106
259/315
.519/.486
611 hp
663
745		306/219
71.6%
90.1/109
267/323
.458/.426
629 hp
683
768		---245/184
75.3%
1.33/2.92
.421/.324
Dart 230 Iron Eagle Platinum Out of Box Weingartner RacingN/A2.08/1.60
4.125
No Pipe		N/A66/50
75.8%		130/115
88.5%		174/149
85.6%
51.2/74.1
152/220
.608/.677
358 hp		226/178
78.8%
66.5/88.5
197/262
.592/.606
465 hp
504		252/192
76.2%
74.2/95.5
220/283
.528/.523
518 hp
562		277/201
72.6%
81.5/100
242/296
.484/.456
570 hp
618
695		281/207
73.7%
82.7/103
245/305
.421/.403
578 hp
627
705		280/211
75.4%
82.4/105
244/311
.367/.359
576 hp
625
703		--231/179
77.3%
-
.421/.324
Dart Iron Eagle Platinum Meaux Racing Heads Out of Box237.3/-2.08/1.60
4.00
No Pipe		49-119/107
89.9%		172/142
82.6%
50.6/70.6
150/209
.601/.645
354 hp		215/167
77.7%
63.3/83.1
187/246
.563/.569
442 hp
480		248/184
74.2%
73/91.5
216/271
.52/.501
510 hp
554		272/197
72.4%
80/98
237/290
.475/.447
560 hp
607
683		276/205
74.3%
81.2/102
241/302
.413/.399
568 hp
616
693		281/210
74.7%
82.7/104
245/309
.368/.358
578 hp
627
705		--226/173
76.6%
-
.421/.324
Dart PRO1 180 Alum180/742.02/1.60
4.03
No Pipe		N/A-134/114
85.1%		187/145
77.5%
58.4/72.1
173/214
.673/.659
385 hp		231/164
71%
72.1/81.6
214/242
.623/.559
475 hp
516		257/172
66.9%
80.2/85.5
238/253
.555/.469
529 hp
574		261/174
66.7%
81.4/86.5
241/256
.469/.395
537 hp
583
655		264/175
66.3%
82.4/87
244/258
.407/.341
543 hp
589
663		---222/157
70.8%
1.47/2.36
.409/.324
Dart PRO1 215 Out of Box Weingartner RacingN/A2.055/1.60
4.125
No Pipe		N/A65/52
80%		138/106
76.8%		198/138
69.7%
59.7/68.6
177/203
.70/.627
407 hp		243/165
67.9%
73.3/82.1
217/243
.645/.562
500 hp
542		273/178
65.2%
82.3/88.5
244/262
.579/.485
562 hp
609		269/186
69.1%
81.1/92.5
240/274
.476/.422
553 hp
600
675		268/189
70.5%
80.8/94
239/279
.406/.368
551 hp
598
673		265/191
72.1%
79.9/95
237/281
.351/.325
545 hp
591
665		--236/165
69.7%
-
.416/.324
Dart PRO1 215 Ported Meaux Racing SF600 Alum215/-2.125/1.60
4.125
No Pipe		N/A-147/111
75.5%		215/161
74.9%
60.6/80.1
180/237
.735/.731
442 hp		260/204
78.5%
73.3/101
217/301
.667/.695
535 hp
580		293/228
77.8%
82.6/113
245/336
.601/.621
603 hp
654		304/240
78.9%
85.7/119
254/354
.52/.545
625 hp
679
763		311/244
78.5%
87.7/121
260/360
.456/.475
640 hp
694
781		319/243
76.2%
89.9/121
267/358
.409/.414
656 hp
712
801		--264/204
77.4%
1.48
.430/.324
Dart PRO1 215 Ported Meaux Racing Welded Pushrod Area SF600 Alum215/-2.125/1.60
4.125
No Pipe		N/A-147/111
75.5%		215/161
74.9%
60.6/80.1
180/237
.735/.731
442 hp		262/204
77.9%
73.9/101
219/301
.672/.695
539 hp
585		293/228
77.8%
82.6/113
245/336
.601/.621
603 hp
654		314/240
76.4%
88.5/119
262/354
.537/.545
646 hp
701
788		319/244
76.5%
89.9/121
267/360
.468/.475
656 hp
712
801		323/243
75.2%
91.1/121
270/358
.414/.414
664 hp
721
811		--268/204
76.4%
1.50
.430/.324
Dart PRO1 200 Ported Bullet Cylinder Heads Alum227/902.05/1.606979/56
70.9%		144/117
81.3%		200/161
80.5%
60.6/80.1
180/237
.709/.731
411 hp		247/194
78.5%
74.8/96.5
222/286
.657/.661
508 hp
551		281/217
77.2%
85.1/108
252/320
.598/.591
578 hp
627		303/236
77.9%
91.8/117
272/348
.537/.536
623 hp
676
760		311/230
74%
94.2/114
279/339
.473/.448
640 hp
694
781		---248/193
77.7%
1.37/2.62
.415/.324
Dart PRO1 CNC Full Port 227 Alum227/852.08/1.625
4.155
No Pipe		66-158/117
74.1%		209/149
71.3%
61.5/71.8
182/213
.73/.666
430 hp		257/182
70.8%
75.6/87.8
224/260
.673/.61
529 hp
574		293/211
72%
86.2/102
255/301
.614/.566
603 hp
654		302/220
72.8%
88.9/106
263/314
.528/.492
621 hp
674
758		309/226
73.1%
90.9/109
269/323
.463/.433
636 hp
690
776		314/232
73.9%
92.4/112
274/331
.411/.389
646 hp
701
788		--263/191
72.6%
1.38/2.73
.421/.329
Dart PRO1 Ported Alum238/-2.125/1.60
-
No Pipe		N/A-147/113
76.9%		199/155
77.9%
56.1/77.1
166/228
.681/.704
409 hp		250/184
73.6%
70.5/91.5
209/271
.641/.627
514 hp
558		288/204
70.8%
81.2/101
241/301
.591/.556
592 hp
643		306/216
70.6%
86.3/107
256/318
.523/.491
629 hp
683
768		----238/174
73.3%
1.29
.430/.324
Dart PRO1 230 Dr Js Performance AlumN/A2.08/1.60
-
Pipe		N/A61/51
83.6%		115/103
89.6%		168/135
80.4%
49.4/67.1
146/199
.587/.613
346 hp		216/166
76.9%
63.6/82.6
188/245
.566/.565
444 hp
482		254/187
73.6%
74.8/93
221/276
.532/.51
523 hp
567		258/202
78.3%
75.9/100
225/298
.451/.459
531 hp
576
648		262/212
80.9%
77.1/105
228/312
.392/.413
539 hp
585
658		---212/168
78.9%
-
.421/.324
Dart PRO1 230 CNC Dr Js Performance AlumN/A2.08/1.60
-
Pipe		N/A71/67
94.4%		141/120
85.1%		207/162
78.3%
60.9/80.6
181/239
.723/.736
426 hp		257/195
75.9%
75.6/97
224/287
.673/.664
529 hp
574		289/219
75.8%
85.1/109
252/323
.606/.597
595 hp
645		300/232
77.3%
88.3/115
262/342
.524/.527
617 hp
670
753		309/244
79%
90.9/121
269/360
.463/.475
636 hp
690
776		---251/195
78%
-
.421/.324
Dart Platinum 23 Deg CNC Rons Porting Service 220 Alum220/-2.05/1.6069-152/111
73%		203/149
73.4%
61.5/74.1
182/220
.72/.677
418 hp		250/182
72.8%
75.7/90.5
224/268
.665/.62
514 hp
558		288/215
74.7%
87.3/107
259/317
.613/.586
592 hp
643		308/229
74.4%
93.3/114
276/337
.546/.52
634 hp
687
773		317/242
76.3%
96/120
285/357
.482/.471
652 hp
708
796		---253/188
74.3%
1.44
.415/.324
Dart Platinum 23 Deg CNC Rons Porting Service 238 Alum238/-2.10/1.6068-143/111
77.6%		203/149
73.4%
58.6/74.1
174/220
.703/.677
418 hp		251/182
72.5%
72.5/90.5
215/268
.651/.62
516 hp
560		284/215
75.7%
82/107
243/317
.59/.586
584 hp
634		313/229
73.2%
90.4/114
268/337
.542/.52
644 hp
699
786		326/242
74.2%
94.1/120
279/357
.484/.471
671 hp
728
818		---253/188
74.2%
1.37
.425/.324
Dart Platinum 23 Deg CNC Rons Porting Service 240 Alum240/-2.125/1.6068-143/111
77.6%		203/149
73.4%
57.2/74.1
170/220
.694/.677
418 hp		254/182
71.7%
71.6/90.5
212/268
.651/.62
523 hp
567		294/215
73.1%
82.9/107
246/317
.603/.586
605 hp
656		317/229
72.2%
89.4/114
265/337
.542/.52
652 hp
708
796		328/242
73.8%
92.5/120
274/357
.481/.471
675 hp
732
823		---257/188
73.3%
1.37
.430/.324
Dart 23 Deg 220-225 Super Mod Alum225/882.08/1.625
4.155
No Pipe		N/A-138/122
88.4%		201/168
83.6%
59.2/81
175/240
.702/.751
413 hp		253/192
75.9%
74.5/92.6
221/274
.663/.644
520 hp
565		279/207
74.2%
82.1/99.8
243/296
.585/.555
574 hp
623		284/211
74.3%
83.6/102
248/301
.496/.472
584 hp
634
713		282/213
75.5%
83/103
246/304
.422/.408
580 hp
629
708		---240/186
77.5%
1.26/2.42
.421/.329
Dart 23 Deg 220-232 Full Port Alum232/982.08/1.60
4.155
No Pipe		N/A-144/121
84%		208/169
81.3%
61.2/84.1
181/249
.727/.768
428 hp		258/216
83.7%
75.9/107
225/318
.676/.736
531 hp
576		296/238
80.4%
87.1/118
258/351
.621/.649
609 hp
661		311/244
78.5%
91.5/121
271/360
.543/.554
640 hp
694
781		316/250
79.1%
93/124
276/368
.473/.487
650 hp
705
793		---256/206
80.8%
1.36/2.55
.421/.324
Dart 23 Deg 220 Full Port No back Cut SF600 Alum240/-2.10/1.60
-
No Pipe		N/A-147/117
79.6%		202/189
93.6%
58.3/94
173/279
.699/.858
416 hp		253/220
87%
73/109
216/324
.657/.749
520 hp
565		287/236
82.2%
82.9/117
246/348
.596/.643
590 hp
641		310/246
79.4%
89.5/122
265/363
.536/.559
638 hp
692
778		320/250
78.1%
92.4/124
274/368
.475/.487
658 hp
714
803		324/251
77.5%
93.5/125
277/370
.42/.428
667 hp
723
813		--263/216
81.9%
1.35
.425/.324
Dart 220 RR Full Port Alum239/1032.10/1.60
-
No Pipe		N/A-154/121
78.6%		223/168
75.3%
64.4/83.6
191/248
.772/.763
459 hp		276/202
73.2%
79.7/100
236/298
.716/.688
568 hp
616		311/229
73.6%
89.8/114
266/337
.646/.624
640 hp
694		319/237
74.3%
92.1/118
273/349
.552/.538
656 hp
712
801		323/243
75.2%
93.3/121
276/358
.479/.473
664 hp
721
811		---268/200
74.7%
1.35/2.36
.425/.324
Dart 220 RR CFE Full Port Alum248/1062.10/1.60
-
No Pipe		N/A-131/115
87.8%		199/154
77.4%
57.5/76.6
170/227
.689/.699
409 hp		254/183
72%
73.3/91
217/270
.659/.623
523 hp
567		289/220
76.1%
83.4/109
247/324
.60/.60
595 hp
645		304/233
76.6%
87.8/116
260/343
.526/.529
625 hp
679
763		304/240
78.9%
87.8/119
260/354
.451/.467
625 hp
679
763		---247/191
77.3%
1.23/2.26
.425/.324
Dart 18 Deg CNC Out of Box Weingartner RacingN/A2.14/1.60
4.125
No Pipe		N/A80/52
65%		150/125
83.3%		220/161
73.2%
61.2/80.1
181/237
.747/.731
453 hp		273/203
74.4%
75.9/101
225/299
.695/.692
562 hp
609		311/226
72.7%
86.5/112
256/333
.634/.616
640 hp
694		349/240
68.8%
97/119
287/354
.593/.545
718 hp
779
876		338/248
73.4%
94/123
278/365
.492/.483
695 hp
754
848		---274/201
73.3%
-
.433/.324
Dart 18 Deg Super Mod SF600246/1052.15/1.60
-
No Pipe		N/A-165/131
79.4%		210/165
78.6%
57.8/82.1
171/243
.71/.749
432 hp		270/195
72.2%
74.4/97
220/287
.684/.664
555 hp
603		321/235
73.2%
88.4/117
262/346
.651/.64
660 hp
716		353/249
70.5%
97.2/124
288/367
.597/.565
726 hp
788
886		357/253
70.9%
98.3/126
291/373
.517/.492
734 hp
797
896		---279/205
73.3%
1.45/2.41
.435/.324
Dart 18 Deg Full Port No Back Cut SF600 Alum252/1052.15/1.60
4.155
No Pipe		N/A-132/101
76.5%		194/144
74.2%
53.4/71.6
158/212
.656/.654
399 hp		252/198
78.6%
69.4/98.5
206/292
.639/.675
518 hp
562		305/217
71.1%
84/108
249/320
.619/.591
627 hp
681		347/227
65.4%
95.6/113
283/335
.586/.516
714 hp
774
871		365/241
66%
101/120
298/355
.529/.469
751 hp
815
916		358/241
67.3%
98.6/120
292/355
.454/.41
736 hp
799
899		--279/196
70.1%
1.45/2.30
.435/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart 18 Deg Full Port No Back Cut SF600 Alum263/1082.18/1.60
4.155
No Pipe		N/A-183/131
71.6%		243/169
69.5%
65.1/84.1
193/249
.81/.768
500 hp		295/225
76.3%
79/112
234/332
.738/.766
607 hp
658		342/246
71.9%
91.6/122
271/363
.684/.67
704 hp
763		364/263
72.3%
97.5/131
289/388
.607/.597
749 hp
812
914		368/268
72.8%
98.6/133
292/395
.526/.522
757 hp
821
924		363/272
74.9%
97.3/135
288/401
.454/.463
747 hp
810
911		--308/225
72.9%
1.40/2.52
.441/.324
Dart 18 Deg Full Port SF600275/1102.18/1.60
-
No Pipe		N/A-165/131
79.4%		210/173
82.4%
56.3/86
167/255
.70/.786
432 hp		272/230
84.6%
72.9/114
216/339
.68/.784
560 hp
607		326/249
76.4%
87.3/124
259/367
.652/.679
671 hp
728		360/263
73.1%
96.4/131
286/388
.60/.597
741 hp
803
904		378/270
71.4%
101/134
300/398
.54/.526
778 hp
844
949		---285/219
76.9%
1.37/2.45
.441/.324
Dart 18 Deg Alum257/-2.15/1.60
4.155
No Pipe		N/A-145/114
78.6%		211/174
82.5%
58.1/86.5
172/256
.713/.79
434 hp		270/217
80.4%
74.4/108
220/320
.684/.739
555 hp
603		321/241
75.1%
88.4/120
262/355
.651/.657
660 hp
716		346/251
72.5%
95.3/125
282/370
.585/.57
712 hp
772
868		350/258
73.7%
96.4/128
286/380
.507/.502
720 hp
781
878		340/262
77.1%
93.7/130
277/386
.431/.446
699 hp
759
853		--283/217
76.5%
1.36
.435/.324
Dart 18 Deg Alum270/-2.18/1.60
4.155
No Pipe		N/A-162/114
70.4%		232/174
75%
62.2/86.5
184/256
.773/.79
477 hp		293/217
74.1%
78.5/108
233/320
.733/.739
603 hp
654		332/241
72.6%
88.9/120
264/355
.664/.657
683 hp
741		359/251
69.9%
96.2/125
285/370
.598/.57
739 hp
801
901		366/258
70.5%
98.1/128
291/380
.523/.502
753 hp
817
919		366/262
71.6%
98.1/130
291/386
.458/.446
753 hp
817
919		--301/217
71.9%
1.36
.441/.324
Dart 16 Deg Full Port Intake Back Cut 45/39/32 SF600 Alum263/1082.15/1.60
-
No Pipe		N/A-145/119
82.1%		219/173
79%
60.3/86
179/255
.74/.786
451 hp		280/213
76.1%
77.1/106
229/314
.71/.726
576 hp
625		325/240
73.8%
89.5/119
265/354
.659/.654
669 hp
725		358/257
71.8%
98.6/128
292/379
.605/.584
736 hp
799
899		379/264
69.7%
104/131
309/389
.549/.514
780 hp
846
951		383/268
70%
105/133
313/395
.485/.456
788 hp
855
961		--298/219
73.4%
1.46/2.48
.435/.324
Dart 16 Deg Full Port Lrg No Back Cut SF600 Alum281/1192.20/1.625
-
No Pipe		N/A-163/106
65%		228/149
65.4%
60/71.8
178/213
.753/.666
469 hp		286/191
66.8%
75.2/92.1
223/273
.709/.641
588 hp
638		340/219
64.4%
89.4/106
265/313
.674/.588
699 hp
759		377/234
62.1%
99.2/113
294/334
.623/.523
776 hp
841
946		387/247
63.8%
102/119
302/353
.548/.473
796 hp
864
971		392/251
64%
103/121
306/359
.486/.421
806 hp
875
984		--310/200
64.3%
1.40/2.11
.446/.329
Dart 16 Deg Port Jones Engineering Alum267/-2.18/1.6048-161/101
62.7%		231/149
64.5%
61.9/74.1
183/220
.77/.677
475 hp		291/211
72.5%
78/105
231/311
.728/.719
599 hp
649		337/237
70.3%
90.3/118
268/349
.674/.646
693 hp
752		360/253
70.3%
96.4/126
286/373
.60/.575
741 hp
803
904		371/263
70.9%
99.4/131
295/388
.53/.512
763 hp
828
931		375/268
71.5%
100/133
298/395
.469/.456
771 hp
837
941		--304/212
69.7%
1.40
.441/.324
Dart 15 Deg Small Alum276/1112.15/1.60
-
No Pipe		51------392/-
108
320
.568
806 hp
875
984		-/263---
-
1.42
.435/.324
Dart 15 Deg Large Alum281/1132.20/1.60
-
No Pipe		51-----------
-
-
.446/.324
Dart High Port 15 Deg - Darin Morgan SF600 AlumN/A2.18/1.625
-
No Pipe		N/A-136/111
81.6%		212/157
74.1%
56.8/75.7
168/224
.707/.702
436 hp		281/214
76.2%
75.3/103
223/306
.703/.718
578 hp
627		339/243
71.7%
90.8/117
269/347
.678/.652
697 hp
757		379/258
68.1%
102/124
301/369
.632/.577
780 hp
846
951		394/265
67.3%
106/128
313/379
.563/.508
811 hp
879
989		396/271
68.4%
106/131
314/387
.495/.454
815 hp
884
994		404/273
67.6%
108/132
321/390
.449/.407
831 hp
902
1014		-/275318/224
70.5%
-
.441/.329
Dart Little Chief 11 Deg 275 I-50 E-55 SF1020 Alum275/1082.18/1.55
4.155
No Pipe		N/A-162/138
85.2%		240/186
77.5%
64.3/98.6
191/292
.80/.872
494 hp		306/241
78.8%
82/128
243/378
.765/.847
629 hp
683		350/266
76%
93.8/141
278/418
.70/.748
720 hp
781		372/274
73.7%
99.7/145
295/430
.62/.642
765 hp
830
934		376/278
73.9%
101/147
298/437
.537/.559
773 hp
839
944		384/280
72.9%
103/148
305/440
.48/.492
790 hp
857
964		389/282
72.5%
104/149
309/443
.432/.441
800 hp
868
976		392/282
71.9%
105/149
311/443
.392/.397
806 hp
875
984		330/247
75%
1.43/2.61
.441/.314
Dart Little Chief 11 Deg 315 I-55 E-55 SF1020 Alum315/1082.23/1.55
4.155
No Pipe		N/A-158/138
87.3%		235/186
79.1%
60.2/98.6
178/292
.766/.872
483 hp		300/241
80.3%
76.8/128
228/378
.733/.847
617 hp
670		352/266
75.6%
90.1/141
267/418
.688/.748
724 hp
786		385/274
71.2%
98.6/145
292/430
.627/.642
792 hp
859
966		401/278
69.3%
103/147
304/437
.56/.559
825 hp
895
1006		405/280
69.1%
104/148
307/440
.495/.492
833 hp
904
1016		410/282
68.8%
105/149
311/443
.445/.441
843 hp
915
1029		415/282
68%
106/149
315/443
.406/.397
854 hp
926
1042		340/247
72.8%
1.32/2.61
.452/.314
Dart Little Chief 11 Deg Ported MBE Alum345/-2.25/1.60
4.155
No Pipe		35-46-140/101
72.1%		222/140
63.1%
55.8/69.6
165/206
.717/.636
457 hp		298/186
62.4%
74.9/92.5
222/274
.722/.634
613 hp
665		360/236
65.6%
90.5/117
268/348
.698/.643
741 hp
803		409/259
63.3%
103/129
305/382
.661/.588
841 hp
913
1027		429/268
62.5%
108/133
320/395
.594/.522
883 hp
957
1077		441/274
62.1%
111/136
329/404
.534/.467
907 hp
984
1107		457/-
115
341
.492
940 hp
1020
1147		468/-
118
349
.453
963 hp
1045
1175		358/209
-
1.36
.456/.324
Dart Little Chief 11 Deg Ported MBE I-55 E-55 SF600 Alum347/-2.27/1.55
4.155
No Pipe		N/A-151/101
66.9%		227/140
61.7%
56.1/74.2
166/220
.727/.656
467 hp		303/186
61.4%
74.9/98.6
222/292
.728/.654
623 hp
676		365/236
64.7%
90.2/125
267/371
.701/.664
751 hp
815		413/259
62.7%
102/137
302/407
.661/.607
850 hp
922
1037		438/268
61.2%
108/142
321/421
.601/.539
901 hp
978
1099		444/274
61.7%
110/145
325/430
.533/.482
913 hp
991
1114		456/276
60.5%
113/146
334/433
.487/.431
938 hp
1018
1144		462/-
114
338
.444
950 hp
1031
1160		362/218
-
1.33
.460/.314
Dart 9 Deg Alum299/2152.20/1.625
-
No Pipe		3870/54
77.1%		153/103
67.3%		227/156
68.7%
59.7/75.2
177/223
.75/.698
467 hp		300/209
69.7%
78.9/101
234/299
.743/.701
617 hp
670		360/243
67.5%
94.7/117
281/347
.714/.652
741 hp
803		406/266
65.5%
107/128
316/380
.671/.595
835 hp
906
1019		421/279
66.3%
111/135
328/399
.596/.535
866 hp
940
1057		---311/209
67.3%
1.41/1.30
.446/.329
Edelbrock E-Street 5073, 5089 SF1020 Alum185/602.02/1.6064/7063/51
81%		125/99
79.2%		182/131
72%
56.8/65.2
168/193
.655/.595
374 hp		225/153
68%
70.2/76.1
208/225
.607/.521
463 hp
502		248/163
65.7%
77.4/81.1
229/240
.535/.444
510 hp
554		249/168
67.5%
77.7/83.6
230/248
.448/.382
512 hp
556
625		----206/143
69.4%
1.35/2.80
.409/.324
Edelbrock 6071, 6073 Alum OLD170/602.02/1.607072/61
84.7%		134/105
78.4%		188/140
74.5%
58.7/69.6
174/206
.676/.636
387 hp		224/160
71.4%
69.9/79.6
207/236
.604/.545
461 hp
500		233/172
73.8%
72.7/85.5
215/253
.503/.469
479 hp
520		233/179
76.8%
72.7/89
215/264
.419/.407
479 hp
520
585		----202/151
74.7%
1.37/2.98
.409/.324
Edelbrock 60719 Performer RPM Straight Plug Alum170/602.02/1.607073/61
83.6%		140/108
77.1%		200/144
72%
62.4/71.6
185/212
.72/.654
411 hp		238/163
68.5%
74.3/81.1
220/240
.642/.555
490 hp
531		244/175
71.7%
76.1/87
226/258
.527/.477
502 hp
545		244/183
75%
76.1/91
226/270
.439/.416
502 hp
545
612		----213/155
72.5%
1.44/3.05
.409/.324
Edelbrock 60739 Performer RPM Angled Plug Alum170/602.02/1.607073/61
83.6%		140/108
77.1%		200/144
72%
62.4/71.6
185/212
.72/.654
411 hp		238/163
68.5%
74.3/81.1
220/240
.642/.555
490 hp
531		244/175
71.7%
76.1/87
226/258
.527/.477
502 hp
545		244/183
75%
76.1/91
226/270
.439/.416
502 hp
545
612		----213/155
72.5%
1.44/3.05
.409/.324
Edelbrock 60859, 60879 Performer Centerbolt SF1020 Alum165/602.02/1.606064/54
84.4%		122/96
78.7%		177/124
70.1%
55.2/61.7
164/183
.637/.563
364 hp		217/147
67.7%
67.7/73.1
201/217
.586/.501
446 hp
484		229/166
72.5%
71.5/82.6
212/245
.494/.452
471 hp
511		232/175
75.4%
72.4/87
214/258
.417/.397
477 hp
518
582		----195/142
72.5%
1.41/2.92
.409/.324
Edelbrock 60899, 60909, 60999 Performer RPM Alum170/602.02/1.606467/58
86.6%		130/108
83.1%		183/144
78.7%
57.1/71.6
169/212
.658/.654
376 hp		226/169
74.8%
70.5/84.1
209/249
.61/.576
465 hp
504		229/175
76.4%
71.5/87
212/258
.494/.477
471 hp
511		232/182
78.4%
72.4/90.5
214/268
.417/.413
477 hp
518
582		----200/156
77.8%
1.36/3.03
.409/.324
Edelbrock Performer RPM 60899, 60999 SF1020 Alum185/652.02/1.606466/55
83.3%		129/98
76%		188/131
69.7%
58.7/65.2
174/193
.676/.595
387 hp		228/152
66.7%
71.1/75.6
211/224
.615/.518
469 hp
509		240/162
67.5%
74.9/80.6
222/239
.518/.441
494 hp
536		241/168
69.7%
75.2/83.6
223/248
.434/.382
496 hp
538
605		----205/142
69.3%
1.30/2.58
.409/.324
Edelbrock Performer RPM 608979 SCCA SF1020 Alum185/651.94/1.556461/51
83.6%		127/95
74.8%		185/118
63.8%
62.6/62.5
185/185
.693/.553
381 hp		217/131
60.4%
73.4/69.4
218/206
.61/.461
446 hp
484		229/137
59.8%
77.5/72.6
230/215
.515/.385
471 hp
511		237/140
59.1%
80.2/74.2
238/220
.444/.328
488 hp
529
595		----199/124
62.4%
1.28/2.15
.393/.314
Edelbrock Performer RPM '86 earlier 60759 SF1020 Alum185/652.02/1.6064/7066/52
78.8%		127/97
76.4%		185/127
68.6%
57.7/63.2
171/187
.666/.577
381 hp		230/146
63.5%
71.8/72.6
213/215
.621/.497
473 hp
513		238/156
65.5%
74.3/77.6
220/230
.514/.425
490 hp
531		239/162
67.8%
74.6/80.6
221/239
.43/.368
492 hp
533
600		----204/138
67.5%
1.29/2.49
.409/.324
Edelbrock 60899 Performer RPM Alum CHP185/632.02/1.606460/48
80%		125/96
76.8%		181/134
74%
56.5/66.6
167/197
.651/.609
372 hp		223/161
72.2%
69.6/80.1
206/237
.602/.548
459 hp
498		244/176
72.1%
76.1/87.5
226/259
.527/.48
502 hp
545		-----193/142
73.4%
1.32/2.79
.409/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Edelbrock 60979 E-Tec 170 SF1020 Alum170/701.94/1.556464/54
84.4%		130/104
80%		186/140
75.3%
62.9/74.2
186/220
.697/.656
383 hp		220/169
76.8%
74.4/89.6
221/265
.618/.594
453 hp
491		232/183
78.9%
78.5/97
233/287
.521/.515
477 hp
518		238/190
79.8%
80.5/101
239/298
.446/.445
490 hp
531
597		----201/157
78.1%
1.40/2.71
.393/.314
Edelbrock 60989 E-Tec 200 SF1020 Alum200/802.02/1.606467/57
85.1%		122/110
90.2%		175/153
87.4%
54.6/76.1
162/225
.63/.695
360 hp		223/182
81.6%
69.6/90.5
206/268
.602/.62
459 hp
498		252/196
77.8%
78.6/97.5
233/289
.544/.534
518 hp
562		259/204
78.8%
80.8/101
239/301
.466/.463
533 hp
578
650		265/207
78.1%
82.7/103
245/305
.409/.403
545 hp
591
665		---216/175
81.2%
1.33/2.59
.409/.324
Edelbrock/ Chapman 61049 Alum236/1002.135/1.625
-
No Pipe		5271/54
76.1%		159/108
67.9%		224/182
81.3%
62.6/87.8
185/260
.762/.814
461 hp		273/222
81.3%
76.3/107
226/317
.697/.745
562 hp
609		305/238
78%
85.2/115
252/340
.623/.639
627 hp
681		314/250
79.6%
87.7/121
260/357
.534/.559
646 hp
701
788		323/260
80.5%
90.2/125
267/371
.471/.498
664 hp
721
811		---266/210
78.8%
1.37/2.60
.432/.329
Edelbrock/ Chapman Victor 18 Deg 61069 Alum252/1002.18/1.6255272/54
75%		161/108
67.1%		232/182
78.4%
62.2/87.8
184/260
.773/.814
477 hp		286/222
77.6%
76.6/107
227/317
.715/.745
588 hp
638		321/238
74.1%
86/115
255/340
.642/.639
660 hp
716		342/250
73.1%
91.6/121
271/357
.57/.559
704 hp
763
858		345/260
75.4%
92.4/125
274/371
.493/.498
710 hp
770
866		---281/210
74.7%
1.37/2.60
.441/.329
Edelbrock 18 Deg. CNC Rons Porting Service AlumN/A2.18/1.62553-150/125
83.3%		220/180
81.8%
58.9/86.8
175/257
.733/.805
453 hp		281/224
79.7%
75.3/108
223/320
.703/.751
578 hp
627		331/240
72.5%
88.7/116
263/343
.662/.644
681 hp
739		362/248
68.5%
97/120
287/354
.603/.555
745 hp
808
909		380/251
66.1%
102/121
302/359
.543/.481
782 hp
848
954		385/254
66%
103/122
306/363
.481/.426
792 hp
859
966		--301/217
72.2%
-
.441/.329
Edelbrock/ Chapman Victor 18 Deg 61089 Alum256/1002.18/1.6255272/54
75%		161/108
67.1%		233/182
78.1%
62.4/87.8
185/260
.777/.814
479 hp		286/222
77.6%
76.6/107
227/317
.715/.745
588 hp
638		321/238
74.1%
86/115
255/340
.642/.639
660 hp
716		344/250
72.7%
92.2/121
273/357
.573/.559
708 hp
768
863		348/260
74.7%
93.2/125
276/371
.497/.498
716 hp
777
873		---282/210
74.4%
1.36/2.60
.441/.329
Edelbrock/ Chapman Victor 18 Deg 61109 Alum236/1002.125/1.6256571/54
76.1%		159/108
67.9%		224/182
81.3%
63.2/87.8
187/260
.766/.814
461 hp		273/222
81.3%
77/107
228/317
.70/.745
562 hp
609		305/238
78%
86/115
255/340
.626/.639
627 hp
681		314/250
79.6%
88.5/121
262/357
.537/.559
646 hp
701
788		323/260
80.5%
91.1/125
270/371
.473/.498
664 hp
721
811		---266/210
78.8%
1.37/2.60
.430/.329
Edelbrock 61119 Victor 15 Deg. Ported Chapman Alum283/1002.18/1.625
-
No Pipe		4363/48
76.2%		137/113
82.5%		215/177
82.3%
57.6/85.3
171/253
.717/.792
442 hp		281/217
77.2%
75.3/105
223/310
.703/.728
578 hp
627		327/240
73.4%
87.6/116
260/343
.654/.644
673 hp
730		363/254
70%
97.3/122
288/363
.605/.568
747 hp
810
911		381/260
68.2%
102/125
302/371
.544/.498
784 hp
850
956		---284/210
74%
1.35/2.60
.441/.329
Edelbrock 61129 Alum252/1002.18/1.6256572/54
75%		161/108
67.1%		232/182
78.4%
62.2/87.8
184/260
.773/.814
477 hp		286/222
77.6%
76.6/107
227/317
.715/.745
588 hp
638		321/238
74.1%
86/115
255/340
.642/.639
660 hp
716		342/250
73.1%
91.6/121
271/357
.57/.559
704 hp
763
858		345/260
75.4%
92.4/125
274/371
.493/.498
710 hp
770
866		---281/210
74.7%
1.37/2.60
.441/.329
Edelbrock 61139 Victor 15 Deg. Ported Chapman Alum317/1002.25/1.625
-
No Pipe		4570/49
70%		142/118
83.1%		216/175
81%
54.3/84.4
161/250
.698/.783
444 hp		280/212
75.7%
70.4/102
209/303
.678/.711
576 hp
625		328/241
73.5%
82.5/116
244/344
.636/.647
675 hp
732		368/257
69.8%
92.6/124
274/367
.594/.575
757 hp
821
924		398/267
67.1%
100/129
297/381
.551/.512
819 hp
888
999		404/271
67.1%
102/131
301/387
.489/.454
831 hp
902
1014		--305/220
72.1%
1.27/2.71
.456/.329
Edelbrock 15 Deg. CNC Rons Porting Service Alum272/-2.18/1.62545-153/110
71.9%		228/184
80.7%
61.1/88.7
181/263
.76/.823
469 hp		292/229
78.4%
78.2/110
232/327
.73/.768
601 hp
652		334/258
77.2%
89.5/124
265/369
.668/.692
687 hp
745		366/268
73.2%
98.1/129
291/383
.61/.599
753 hp
817
919		382/274
71.7%
102/132
303/391
.546/.525
786 hp
853
959		---293/221
75.4%
1.40
.441/.329
Edelbrock 15 Deg CNC Race Flow Development Alum522.25/1.625N/A-156/120
76.9%		228/180
78.9%
57.3/86.8
170/257
.736/.805
469 hp		304/220
72.4%
76.5/106
227/314
.736/.738
625 hp
679		363/246
67.8%
91.3/119
271/351
.703/.66
747 hp
810		398/258
64.8%
100/124
297/369
.643/.577
819 hp
888
999		410/269
65.6%
103/130
306/384
.568/.516
843 hp
915
1029		418/273
65.3%
105/132
311/390
.506/.458
860 hp
933
1049		422/280
66.4%
106/135
314/400
.454/.417
868 hp
942
1059		-337/231
68.4%
8.12
.456/.329
Edelbrock 61149 Alum256/1002.18/1.6256572/54
75%		161/108
67.1%		233/182
78.1%
62.4/87.8
185/260
.777/.814
479 hp		286/222
77.6%
76.6/107
227/317
.715/.745
588 hp
638		321/238
74.1%
86/115
255/340
.642/.639
660 hp
716		344/250
72.7%
92.2/121
273/357
.573/.559
708 hp
768
863		348/260
74.7%
93.2/125
276/371
.497/.498
716 hp
777
873		---282/210
74.4%
1.36/2.60
.441/.329
Edelbrock/ Chapman Victor 18 Deg 61159 Alum246/1002.15/1.6255272/54
75%		161/108
67.1%		232/182
78.4%
63.9/87.8
189/260
.784/.814
477 hp		286/222
77.6%
78.8/107
233/317
.725/.745
588 hp
638		321/238
74.1%
88.4/115
262/340
.651/.639
660 hp
716		340/250
73.5%
93.7/121
277/357
.575/.559
699 hp
759
853		342/260
76%
94.2/125
279/371
.495/.498
704 hp
763
858		---280/210
74.9%
1.39/2.60
.435/.329
Edelbrock 61169 Alum266/1002.18/1.6255271/54
76.1%		151/108
71.5%		226/182
80.5%
60.5/87.8
179/260
.753/.814
465 hp		271/222
81.9%
72.6/107
215/317
.678/.745
557 hp
605		323/238
73.7%
86.5/115
256/340
.646/.639
664 hp
721		350/250
71.4%
93.8/121
278/357
.583/.559
720 hp
781
878		355/260
73.2%
95.1/125
282/371
.507/.498
730 hp
792
891		---279/210
75.2%
1.33/2.60
.441/.329
Edelbrock 61179 Alum270/1052.18/1.6254771/51
71.8%		151/114
75.5%		226/180
79.6%
60.5/86.8
179/257
.753/.805
465 hp		271/213
78.6%
72.6/103
215/304
.678/.714
557 hp
605		323/240
74.3%
86.5/116
256/343
.646/.644
664 hp
721		350/248
70.9%
93.8/120
278/354
.583/.555
720 hp
781
878		355/255
71.8%
95.1/123
282/364
.507/.489
730 hp
792
891		---279/208
74.6%
1.31/2.43
.441/.329
Edelbrock 61189 Alum246/1002.18/1.6256572/54
75%		161/108
67.1%		232/182
78.4%
62.2/87.8
184/260
.773/.814
477 hp		286/222
77.6%
76.6/107
227/317
.715/.745
588 hp
638		321/238
74.1%
86/115
255/340
.642/.639
660 hp
716		340/250
73.5%
91.1/121
270/357
.567/.559
699 hp
759
853		342/260
76%
91.6/125
271/371
.489/.498
704 hp
763
858		---280/210
74.9%
1.39/2.60
.441/.329
Edelbrock 61199 Alum266/1002.18/1.6256571/54
76.1%		151/108
71.5%		226/182
80.5%
60.5/87.8
179/260
.753/.814
465 hp		271/222
81.9%
72.6/107
215/317
.678/.745
557 hp
605		323/238
73.7%
86.5/115
256/340
.646/.639
664 hp
721		350/250
71.4%
93.8/121
278/357
.583/.559
720 hp
781
878		355/260
73.2%
95.1/125
282/371
.507/.498
730 hp
792
891		---279/210
75.2%
1.33/2.60
.441/.329
Edelbrock/ Chapman Victor 23 Deg 61209 Alum238/852.125/1.625
-
No Pipe		7168/54
79.4%		147/106
72.1%		221/181
81.9%
62.3/87.3
185/259
.756/.809
455 hp		265/212
80%
74.7/102
221/303
.68/.711
545 hp
591		293/228
77.8%
82.6/110
245/326
.601/.612
603 hp
654		312/235
75.3%
88/113
261/336
.534/.525
642 hp
696
783		317/240
75.7%
89.4/116
265/343
.465/.46
652 hp
708
796		---259/200
77.3%
1.33/2.82
.430/.329
Edelbrock/ Chapman Victor 23 Deg 61229 Alum243/852.125/1.625
-
No Pipe		7167/54
80.6%		147/106
72.1%		221/181
81.9%
62.3/87.3
185/259
.756/.809
455 hp		269/212
78.8%
75.8/102
225/303
.69/.711
553 hp
600		299/228
76.3%
84.3/110
250/326
.614/.612
615 hp
667		310/235
75.8%
87.4/113
259/336
.53/.525
638 hp
692
778		315/240
76.2%
88.8/116
263/343
.462/.46
648 hp
703
791		---260/200
77%
1.30/2.82
.430/.329
Edelbrock/ Chapman Victor 23 Deg 61249 Alum247/852.125/1.625
-
No Pipe		7171/54
76.1%		146/106
72.6%		222/181
81.5%
62.6/87.3
185/259
.759/.809
457 hp		268/212
79.1%
75.6/102
224/303
.687/.711
551 hp
598		299/228
76.3%
84.3/110
250/326
.614/.612
615 hp
667		314/235
74.8%
88.5/113
262/336
.537/.525
646 hp
701
788		321/240
74.8%
90.5/116
268/343
.47/.46
660 hp
716
806		---262/200
76.6%
1.30/2.82
.430/.329
Edelbrock Victor Jr. 23 Deg. 77569, 77579, 77589, 77599, 77619, 77629, 77639, 77649 SF1020 Alum215/852.08/1.6064/7067/64
95.5%		119/112
94.1%		177/153
86.4%
52.1/76.1
154/225
.618/.695
364 hp		226/188
83.2%
66.5/93.5
197/277
.592/.64
465 hp
504		265/207
78.1%
78/103
231/305
.556/.564
545 hp
591		281/217
77.2%
82.7/108
245/320
.491/.493
578 hp
627
705		285/220
77.2%
83.9/109
249/324
.427/.428
586 hp
636
715		---226/183
81.1%
1.33/2.59
.421/.324
Edelbrock Victor Jr. 23 Deg. 7761 Alum CHPN/A2.08/1.60N/A69/57
82.6%		123/111
90.2%		173/145
83.8%
50.9/72.1
151/214
.604/.659
356 hp		219/180
82.2%
64.5/89.5
191/265
.574/.613
451 hp
489		255/198
77.6%
75/98.5
222/292
.535/.54
525 hp
569		275/206
74.9%
80.9/102
240/304
.48/.468
566 hp
614
690		284/206
72.5%
83.6/102
248/304
.425/.401
584 hp
634
713		---222/174
78.7%
-
.421/.324
Edelbrock Victor Jr. 23 Deg. Ported Bullet Cylinder Heads Alum225/902.08/1.606872/55
76.4%		144/107
74.3%		201/156
77.6%
59.2/77.6
175/230
.702/.709
413 hp		255/185
72.5%
75/92
222/273
.668/.63
525 hp
569		287/208
72.5%
84.5/103
250/307
.602/.567
590 hp
641		297/221
74.4%
87.4/110
259/326
.519/.502
611 hp
663
745		303/226
74.6%
89.2/112
264/333
.454/.44
623 hp
676
760		---248/184
74.2%
1.35/2.51
.421/.324
EngineQuest 167 23 Deg Out of Box Weingartner Racing Iron167/-2.02/1.60
4.125
No Pipe		6770/64
91.4%		124/109
87.9%		173/158
91.3%
54/78.6
160/233
.622/.718
356 hp		207/164
79.2%
64.6/81.6
191/242
.559/.559
426 hp
462		230/167
72.6%
71.8/83.1
213/246
.496/.455
473 hp
513		238/166
69.7%
74.3/82.6
220/245
.428/.377
490 hp
531
597		241/166
68.9%
75.2/82.6
223/245
.372/.323
496 hp
538
605		---202/155
76.7%
1.44
.409/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
EngineQuest CC180BA 23 Deg Iron180/-2.02/1.60
-
No Pipe		6465/55
84.6%		130/107
82.3%		178/133
74.7%
55.5/66.1
165/196
.64/.604
366 hp		213/157
73.7%
66.5/78.1
197/231
.575/.535
438 hp
475		235/174
74%
73.3/86.5
217/256
.507/.474
483 hp
525		242/183
75.6%
75.5/91
224/270
.435/.416
498 hp
540
607		244/188
77%
76.1/93.5
226/277
.376/.366
502 hp
545
612		---207/157
75.8%
1.36
.409/.324
EngineQuest CC200BA 23 Deg Iron200/-2.02/1.60
-
No Pipe		6475/65
86.7%		137/113
82.5%		186/147
79%
58/73.1
172/217
.669/.668
383 hp		225/170
75.6%
70.2/84.6
208/251
.607/.579
463 hp
502		252/182
72.2%
78.6/90.5
233/268
.544/.496
518 hp
562		265/188
70.9%
82.7/93.5
245/277
.477/.427
545 hp
591
665		272/189
69.5%
84.9/94
251/279
.419/.368
560 hp
607
683		---223/165
74%
1.36
.409/.324
EngineQuest AC200BS 23 Deg Out of Box Shaver Alum197/-2.02/1.606559/51
86.4%		122/101
82.8%		176/139
79%
54.9/69.1
163/205
.633/.631
362 hp		217/167
77%
67.7/83.1
201/246
.586/.569
446 hp
484		231/180
77.9%
72.1/89.5
214/265
.499/.491
475 hp
516		225/185
82.2%
70.2/92
208/273
.405/.42
463 hp
502
565		228/187
82%
71.1/93
211/276
.352/.364
469 hp
509
572		---200/160
80%
1.17
.409/.324
EngineQuest CC220BA 23 Deg Iron220/-2.02/1.60
-
No Pipe		6471/64
90.1%		141/115
81.6%		196/145
74%
61.2/72.1
181/214
.705/.659
403 hp		238/170
71.4%
74.3/84.6
220/251
.642/.579
490 hp
531		265/189
71.3%
82.7/94
245/279
.572/.515
545 hp
591		280/202
72.1%
87.4/100
259/298
.504/.459
576 hp
625
703		284/208
73.2%
88.6/103
263/307
.438/.405
584 hp
634
713		---234/172
73.3%
1.29
.409/.324
EngineQuest 220 23 Deg Out of Box Weingartner Racing Iron220/-2.02/1.60
4.125
No Pipe		6475/49
65.3%		145/103
71%		204/136
66.7%
63.7/67.6
189/200
.734/.618
420 hp		252/155
61.5%
78.6/77.1
233/228
.68/.528
518 hp
562		278/171
61.5%
86.7/85
257/252
.60/.466
572 hp
620		292/183
62.7%
91.1/91
270/270
.525/.416
601 hp
652
733		296/191
64.5%
92.4/95
274/281
.456/.372
609 hp
661
743		---245/157
64%
1.35
.409/.324
EngineQuest CC235BA 23 Deg Iron235/-2.08/1.60
-
No Pipe		6472/56
77.8%		141/107
75.9%		198/138
69.7%
58.3/68.6
173/203
.692/.627
407 hp		247/168
68%
72.7/83.6
215/248
.647/.572
508 hp
551		279/187
67%
82.1/93
243/276
.585/.51
574 hp
623		296/195
65.9%
87.1/97
258/287
.517/.443
609 hp
661
743		304/200
65.8%
89.5/99.5
265/295
.455/.389
625 hp
679
763		---244/166
67.9%
1.29
.421/.324
EngineQuest 235 23 Deg Out of Box Weingartner Racing Iron235/-2.08/1.60
4.125
No Pipe		7270/55
78.6%		139/115
82.7%		199/171
85.9%
58.6/85
174/252
.695/.777
409 hp		246/190
77.2%
72.4/94.5
215/280
.645/.647
506 hp
549		282/199
70.6%
83/99
246/293
.591/.542
580 hp
629		308/202
65.6%
90.6/100
269/298
.538/.459
634 hp
687
773		313/204
65.2%
92.1/101
273/301
.469/.397
644 hp
699
786		---248/180
72.7%
1.33
.421/.324
EngineQuest 235 23 Deg Out of Box Weingartner Racing Brez I-30 E-30 back Cut Iron235/-2.08/1.60
4.155
No Pipe		6474/64
86.5%		146/116
79.5%		245/150
61.2%
72.1/74.6
214/221
.856/.681
504 hp		276/173
62.7%
81.2/86
241/255
.723/.589
568 hp
616		295/190
64.4%
86.8/94.5
257/280
.618/.518
607 hp
658		305/198
64.9%
89.8/98.5
266/292
.533/.45
627 hp
681
766		310/204
65.8%
91.2/101
270/301
.464/.397
638 hp
692
778		---263/172
65.4%
1.32
.421/.324
EngineQuest 23 Deg Dr Js Performance Iron232/-2.08/1.60
N/A71/63
88.7%		139/125
89.9%		200/158
79%
58.9/78.6
174/233
.699/.718
411 hp		242/190
78.5%
71.2/94.5
211/280
.634/.647
498 hp
540		277/214
77.3%
81.5/106
242/315
.581/.583
570 hp
618		297/230
77.4%
87.4/114
259/339
.519/.522
611 hp
663
745		307/241
78.5%
90.3/120
268/355
.46/.469
632 hp
685
771		---244/193
79.2%
1.32
.421/.324
EngineQuest CH350A Vortec Iron176/-1.84/1.50
-
No Pipe		58-----------
-
-
.373/.304
EngineQuest CH350C Vortec Iron170/-2.02/1.60
-
No Pipe		6454/49
90.7%		104/88
84.6%		194/119
61.3%
60.5/59.2
179/175
.698/.541
399 hp		224/140
62.5%
69.9/69.6
207/206
.604/.477
461 hp
500		224/148
66.1%
69.9/73.6
207/218
.484/.403
461 hp
500		226/152
67.3%
70.5/75.6
209/224
.407/.345
465 hp
504
567		228/152
66.7%
71.1/75.6
211/224
.352/.296
469 hp
509
572		---200/133
66.6%
1.34
.409/.324
EngineQuest CH350I IMCA Iron167/-1.94/1.50N/A-----------
-
-
.393/.304
HRD Ported All Pro 23 Deg AlumN/A2.125/1.61N/A-148/120
81.1%		221/165
74.7%
62.3/81
185/240
.756/.745
455 hp		275/235
85.5%
77.5/115
230/342
.705/.796
566 hp
614		312/257
82.4%
88/126
261/374
.64/.696
642 hp
696		329/266
80.9%
92.8/131
275/387
.563/.60
677 hp
734
826		344/270
78.5%
97/133
287/393
.504/.522
708 hp
768
863		---272/219
80.6%
-
.430/.326
HRD Ported All Pro 227 AlumN/A2.15/1.625N/A-148/115
77.7%		217/191
88%
59.8/92.1
177/273
.733/.854
446 hp		272/242
89%
74.9/117
222/346
.69/.812
560 hp
607		317/260
82%
87.3/125
259/371
.643/.698
652 hp
708		342/269
78.7%
94.2/130
279/384
.578/.602
704 hp
763
858		352/273
77.6%
97/132
287/390
.51/.523
724 hp
786
883		358/277
77.4%
98.6/134
292/396
.454/.465
736 hp
799
899		--287/232
81.1%
-
.435/.329
HRD Ported AFR 215245/-2.125/1.61N/A-142/111
78.2%		215/162
75.3%
60.6/79.6
180/236
.735/.731
442 hp		271/222
81.9%
76.4/109
226/323
.695/.752
557 hp
605		310/244
78.7%
87.4/120
259/355
.636/.661
638 hp
692		328/251
76.5%
92.5/123
274/365
.561/.566
675 hp
732
823		340/254
74.7%
95.9/125
284/370
.498/.491
699 hp
759
853		---268/207
77.5%
1.39
.430/.326
HRD Ported Brodix Track I AlumN/A2.08/1.60N/A-138/111
80.4%		198/160
80.8%
58.3/79.6
173/236
.692/.727
407 hp		254/209
82.3%
74.8/104
221/308
.666/.712
523 hp
567		297/218
73.4%
87.4/108
259/321
.623/.594
611 hp
663		312/225
72.1%
91.8/112
272/332
.545/.511
642 hp
696
783		320/220
68.8%
94.2/109
279/324
.479/.428
658 hp
714
803		---253/191
75.2%
-
.421/.324
HRD Ported GM 580/855 18 Deg255/-2.15/1.625N/A-154/111
72.1%		221/159
71.9%
60.9/76.7
180/227
.747/.711
455 hp		276/235
85.1%
76/113
225/336
.70/.788
568 hp
616		321/251
78.2%
88.4/121
262/359
.651/.674
660 hp
716		355/262
73.8%
97.8/126
290/374
.60/.586
730 hp
792
891		364/270
74.2%
100/130
297/386
.527/.517
749 hp
812
914		---282/215
76.2%
1.43
.435/.329
HRD Ported GM 855 18 DegN/A2.18/1.60N/A-149/114
76.5%		225/178
79.1%
60.3/88.5
179/262
.75/.808
463 hp		277/231
83.4%
74.2/115
220/340
.693/.787
570 hp
618		318/260
81.8%
85.2/129
252/383
.636/.709
654 hp
710		355/267
75.2%
95.1/133
282/393
.592/.606
730 hp
792
891		365/270
74%
97.8/134
290/398
.521/.526
751 hp
815
916		371/-
99.4
295
.464
763 hp
828
931		--294/220
-
-
.441/.324
HRD Ported GM 12480011 SB2.2N/A-N/A-157/111
70.7%		240/160
66.7%
-
494 hp		297/227
76.4%
-
611 hp
663		339/254
74.9%
-
697 hp
757		364/264
72.5%
-
749 hp
812
914		374/272
72.7%
-
769 hp
835
939		380/276
72.6%
-
782 hp
848
954		--307/223
72.7%
HRD Ported GM 12480011 SB2.2290/-2.17/1.61N/A-140/114
81.4%		249/162
65.1%
67.3/79.6
199/236
.834/.731
512 hp		314/221
70.4%
84.9/109
252/322
.789/.748
646 hp
701		355/249
70.1%
96/122
284/362
.713/.674
730 hp
792		383/262
68.4%
104/129
307/381
.641/.591
788 hp
855
961		393/270
68.7%
106/133
315/393
.564/.522
808 hp
877
986		406/288
70.9%
110/141
325/419
.51/.487
835 hp
906
1019		--320/224
69.9%
1.40
.439/.326
HRD Ported GM SB2.2 Hi/Lo270/-2.17/1.6138-142/114
80.3%		227/165
72.7%
61.4/81
182/240
.76/.745
467 hp		298/217
72.8%
80.6/107
239/316
.749/.735
613 hp
665		350/248
70.9%
94.6/122
280/361
.703/.672
720 hp
781		379/267
70.4%
102/131
304/389
.635/.603
780 hp
846
951		392/278
70.9%
106/137
314/405
.563/.538
806 hp
875
984		398/281
70.6%
108/138
319/409
.50/.476
819 hp
888
999		--312/224
71.8%
1.47
.439/.326
HRD Ported GM 517 Splayed ValN/A2.20/1.625N/A-142/114
80.3%		225/178
79.1%
59.2/85.8
175/254
.743/.796
463 hp		294/226
76.9%
77.3/109
229/323
.728/.758
605 hp
656		375/257
68.5%
98.6/124
292/367
.743/.69
771 hp
837		375/273
72.8%
98.6/132
292/390
.619/.61
771 hp
837
941		395/283
71.6%
104/136
308/404
.559/.542
813 hp
882
991		406/287
70.7%
107/138
316/410
.503/.481
835 hp
906
1019		411/290
70.6%
108/140
320/414
.453/.432
845 hp
917
1032		-328/239
72.7%
-
.446/.329
HRD Ported GM 517 Splayed ValN/A2.225/1.625N/A-135/111
82.2%		220/146
66.4%
56.6/70.4
168/209
.719/.653
453 hp		294/192
65.3%
75.6/92.6
224/274
.72/.644
605 hp
656		353/235
66.6%
90.8/113
269/336
.692/.631
726 hp
788		391/265
67.8%
101/128
298/379
.639/.593
804 hp
873
981		409/281
68.7%
105/135
312/401
.573/.539
841 hp
913
1027		420/288
68.6%
108/139
320/411
.514/.483
864 hp
937
1054		433/292
67.4%
111/141
330/417
.471/.435
891 hp
966
1087		-332/226
68.2%
-
.451/.329
HRD Ported GM 615x 15 Deg268/-2.18/1.61N/A-151/114
75.5%		218/168
77.1%
58.4/82.5
173/245
.727/.758
448 hp		270/232
85.9%
72.3/114
214/338
.675/.785
555 hp
603		317/257
81.1%
84.9/126
252/374
.634/.696
652 hp
708		352/271
77%
94.3/133
279/394
.587/.612
724 hp
786
883		389/280
72%
104/138
309/408
.556/.542
800 hp
868
976		401/283
70.6%
107/139
318/412
.501/.479
825 hp
895
1006		410/285
69.5%
110/140
325/415
.456/.429
843 hp
915
1029		-314/236
75.4%
1.53
.441/.326
HRD Ported GM 615x 15 Deg285/-2.20/1.61N/A-134/121
90.3%		211/178
84.4%
55.5/87.4
164/259
.697/.803
434 hp		265/229
86.4%
69.7/112
207/333
.657/.775
545 hp
591		317/259
81.7%
83.4/127
247/377
.628/.701
652 hp
708		357/272
76.2%
93.9/134
278/396
.59/.614
734 hp
797
896		390/278
71.3%
103/137
304/405
.552/.538
802 hp
870
979		410/282
68.8%
108/139
320/410
.508/.477
843 hp
915
1029		422/288
68.2%
111/141
329/419
.465/.433
868 hp
942
1059		-313/238
76.1%
1.48
.446/.326
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
HRD Ported GM 615x 15 Deg Rolled to 13 Deg260/-2.17/1.6026-125/109
87.2%		199/175
87.9%
53.8/87
159/258
.666/.795
409 hp		257/228
88.7%
69.5/113
206/336
.646/.777
529 hp
574		312/262
84%
84.4/130
250/386
.627/.714
642 hp
696		355/275
77.5%
96/137
284/405
.594/.625
730 hp
792
891		384/284
74%
104/141
308/419
.551/.553
790 hp
857
964		408/290
71.1%
110/144
327/427
.512/.494
839 hp
911
1024		419/296
70.6%
113/147
336/436
.468/.448
862 hp
935
1052		-307/240
78%
1.61
.439/.324
Holley 300-570 Alum172/-2.02/1.60
-
Pipe		6972/53
73.6%		134/102
76.1%		188/143
76.1%
58.7/71.1
174/211
.676/.65
387 hp		223/170
76.2%
69.6/84.6
206/251
.602/.579
459 hp
498		232/177
76.3%
72.4/88
214/261
.501/.482
477 hp
518		236/180
76.3%
73.6/89.5
218/265
.425/.409
485 hp
527
592		----203/154
76.2%
1.37
.409/.324
Holley SysteMax Alum186/-2.02/1.60
-
Pipe		6866/53
80.3%		130/92
70.8%		184/122
66.3%
57.4/60.7
170/180
.662/.554
379 hp		222/148
66.7%
69.3/73.6
205/218
.599/.504
457 hp
495		242/172
71.1%
75.5/85.5
224/253
.522/.469
498 hp
540		252/187
74.2%
78.6/93
233/276
.453/.425
518 hp
562
632		----206/144
70%
1.35
.409/.324
Holley Avenger Alum184/682.02/1.6068----223/173
77.6%
69.6/86
206/255
.481/.471
459 hp
498		------
-
1.21/2.54
.409/.324
Patriot 23 Deg 185 Out of Box Cylinder Head Works SF600 Alum185/-2.02/1.60
4.00		N/A56/53
94.6%		101/83
82.2%		147/114
77.6%
45.9/56.7
136/168
.529/.518
302 hp		190/137
72.1%
59.3/68.1
176/202
.513/.467
391 hp
424		227/155
68.3%
70.8/77.1
210/228
.49/.422
467 hp
507		245/171
69.8%
76.4/85
227/252
.441/.388
504 hp
547
615		248/177
71.4%
77.4/88
229/261
.382/.345
510 hp
554
622		---193/140
72.3%
1.34
.409/.324
Patriot 23 Deg 190 CNC Alum190/622.02/1.606464/50
78.1%		130/96
73.8%		181/136
75.1%
56.5/67.6
167/200
.651/.618
372 hp		219/165
75.3%
68.3/82.1
202/243
.591/.562
451 hp
489		248/181
73%
77.4/90
229/267
.535/.493
510 hp
554		260/190
73.1%
81.1/94.5
240/280
.468/.431
535 hp
580
653		----208/154
74%
1.37/3.06
.409/.324
Patriot 23 Deg 195 CNC Alum195/-2.02/1.606470/68
97.1%		140/106
75.7%		193/144
74.6%
60.2/71.6
178/212
.694/.654
397 hp		230/178
77.4%
71.8/88.5
213/262
.621/.606
473 hp
513		259/190
73.4%
80.8/94.5
239/280
.559/.518
533 hp
578		270/201
74.4%
84.3/100
250/296
.486/.456
555 hp
603
678		273/211
77.3%
85.2/105
252/311
.421/.411
562 hp
609
685		---228/172
75.5%
1.40
.409/.324
Patriot 23 Deg 195 Dr Js Performance Alum195/-2.05/1.60
-
Pipe		N/A70/52
74.3%		132/94
71.2%		180/127
70.6%
54.5/63.2
162/187
.638/.577
370 hp		220/162
73.6%
66.7/80.6
197/239
.585/.552
453 hp
491		244/178
73%
73.9/88.5
219/262
.519/.485
502 hp
545		260/188
72.3%
78.8/93.5
233/277
.461/.427
535 hp
580
653		260/192
73.8%
78.8/95.5
233/283
.395/.374
535 hp
580
653		---216/157
72.6%
1.33
.415/.324
Patriot 23 Deg 215 CNC Alum215/-2.02/1.606471/68
95.8%		141/106
75.2%		196/144
73.5%
61.2/71.6
181/212
.705/.654
403 hp		234/178
76.1%
73/88.5
216/262
.631/.606
481 hp
522		260/190
73.1%
81.1/94.5
240/280
.561/.518
535 hp
580		278/201
72.3%
86.7/100
257/296
.50/.456
572 hp
620
698		282/211
74.8%
88/105
261/311
.435/.411
580 hp
629
708		---232/172
74%
1.31
.409/.324
Patriot 23 Deg 215 CNC Alum215/-2.08/1.606472/68
94.4%		138/106
76.8%		191/144
75.4%
56.2/71.6
167/212
.667/.654
393 hp		230/178
77.4%
67.7/88.5
201/262
.603/.606
473 hp
513		261/190
72.8%
76.8/94.5
228/280
.547/.518
537 hp
583		283/201
71%
83.3/100
247/296
.494/.456
582 hp
632
710		290/211
72.8%
85.3/105
253/311
.434/.411
597 hp
647
728		---232/172
73.9%
1.35
.421/.324
Patriot 23 Deg 225 Out of Box Cylinder Head Works SF600 Alum225/-2.08/1.60
4.00		N/A64/48
75%		127/93
73.2%		181/135
74.6%
53.3/67.1
158/199
.632/.613
372 hp		229/156
68.1%
67.4/77.6
200/230
.60/.531
471 hp
511		266/167
62.8%
78.3/83.1
232/246
.558/.455
547 hp
594		278/170
61.2%
81.8/84.6
242/251
.486/.386
572 hp
620
698		283/174
61.5%
83.3/86.5
247/256
.424/.339
582 hp
632
710		---227/149
65.6%
1.26
.421/.324
PBM 15 Deg CNC AlumN/A2.18/1.62545-153/110
71.9%		228/184
80.7%
61.1/88.7
181/263
.76/.823
469 hp		300/229
76.3%
80.4/110
238/327
.75/.768
617 hp
670		340/258
75.9%
91.1/124
270/369
.68/.692
699 hp
759		371/268
72.2%
99.4/129
295/383
.618/.599
763 hp
828
931		382/274
71.7%
102/132
303/391
.546/.525
786 hp
853
959		---296/221
74.6%
-
.441/.329
Pro Comp 23 Deg AlumN/A2.02/1.606471/57
80.3%		146/101
69.2%		204/157
77%
63.7/78.1
189/231
.734/.713
420 hp		250/177
70.8%
78/88
231/261
.675/.603
514 hp
558		261/186
71.3%
81.4/92.5
241/274
.563/.507
537 hp
583		267/190
71.2%
83.3/94.5
247/280
.48/.431
549 hp
596
670		276/195
70.7%
86.1/97
255/287
.426/.38
568 hp
616
693		---234/168
71.7%
-
.409/.324
Pro Comp 190 OLD Out of BoxWeingartner Racing Alum190/-2.02/1.60
4.125
No Pipe		N/A71/55
77.5%		130/110
84.6%		174/143
82.2%
54.3/71.1
161/211
.626/.65
358 hp		217/157
72.4%
67.7/78.1
201/231
.586/.535
446 hp
484		247/159
64.4%
77.1/79.1
228/234
.533/.433
508 hp
551		250/157
62.8%
78/78.1
231/231
.45/.357
514 hp
558
627		250/156
62.4%
78/77.6
231/230
.385/.304
514 hp
558
627		---211/147
69.6%
1.32
.409/.324
Pro Comp 190 Out of Box Weingartner Racing Alum190/-2.02/1.60
4.125
No Pipe		N/A71/55
77.5%		127/104
81.9%		178/132
74.2%
55.5/65.7
165/195
.64/.60
366 hp		222/165
74.3%
69.3/82.1
205/243
.599/.562
457 hp
495		253/180
71.1%
78.9/89.5
234/265
.546/.491
520 hp
565		279/181
64.9%
87.1/90
258/267
.502/.411
574 hp
623
700		287/182
63.4%
89.6/90.5
265/268
.443/.354
590 hp
641
720		---224/157
70.1%
1.51
.409/.324
Pro Comp 190 23 Deg Dr Js Performance Alum190/-2.02/1.60N/A60/52
86.7%		107/81
75.7%		152/109
71.7%
47.4/54.2
141/161
.547/.495
313 hp		200/136
68%
62.4/67.6
185/200
.54/.463
411 hp
446		238/156
65.5%
74.3/77.6
220/230
.514/.425
490 hp
531		257/174
67.7%
80.2/86.5
238/256
.462/.395
529 hp
574
645		260/177
68.1%
81.1/88
240/261
.401/.345
535 hp
580
653		---202/139
68.6%
1.37
.409/.324
Pro Comp 190 23 Deg CNC Dr Js Performance AlumN/A2.08/1.60
-
1 3/4" Pipe		N/A73/65
89%		139/115
82.7%		201/138
68.7%
59.2/68.6
175/203
.702/.627
413 hp		245/167
68.2%
72.1/83.1
214/246
.642/.569
504 hp
547		272/198
72.8%
80/98.5
237/292
.57/.54
560 hp
607		289/217
75.1%
85.1/108
252/320
.505/.493
595 hp
645
725		297/231
77.8%
87.4/115
259/340
.445/.45
611 hp
663
745		---241/178
73.9%
-
.421/.324
Pro Comp 220 23 Deg CNC Dr Js Performance Alum220/-2.08/1.606675/69
92%		144/110
76.4%		201/145
72.1%
59.2/72.1
175/214
.702/.659
413 hp		244/175
71.7%
71.8/87
213/258
.639/.596
502 hp
545		285/200
70.2%
83.9/99.5
249/295
.597/.545
586 hp
636		308/215
69.8%
90.6/107
269/317
.538/.488
634 hp
687
773		314/228
72.6%
92.4/113
274/336
.47/.444
646 hp
701
788		318/237
74.5%
93.6/118
277/349
.417/.404
654 hp
710
798		325/241
74.2%
95.6/120
283/355
.379/.365
669 hp
725
816		-267/194
72.5%
1.48
.421/.324
Pro Comp 23 Deg 210 CNC Alum210/-2.02/1.60
4.125		N/A77/56
72.7%		157/112
71.3%		212/156
73.6%
66.2/77.6
196/230
.763/.709
436 hp		240/183
76.3%
74.9/91
222/270
.648/.623
494 hp
536		264/199
75.4%
82.4/99
244/293
.57/.542
543 hp
589		278/208
74.8%
86.7/103
257/307
.50/.472
572 hp
620
698		287/213
74.2%
89.6/106
265/314
.443/.415
590 hp
641
720		---240/179
74.5%
1.37
.409/.324
Pro Comp 23 Deg 210 PC3003 SF600 Alum210/-2.02/1.60
-
Pipe		N/A63/52
82.5%		117/98
83.8%		163/132
81%
50.9/65.7
151/195
.586/.60
335 hp		204/162
79.4%
63.7/80.6
189/239
.55/.552
420 hp
455		230/180
78.3%
71.8/89.5
213/265
.496/.491
473 hp
513		248/189
76.2%
77.4/94
229/279
.446/.429
510 hp
554
622		252/192
76.2%
78.6/95.5
233/283
.389/.374
518 hp
562
632		---202/159
78.5%
1.20
.409/.324
Pro Comp 210 CNC Out of Box Weingartner Racing Alum210/-2.02/1.60
4.125
No Pipe		N/A77/56
72.7%		157/112
71.3%		212/156
73.6%
66.2/77.6
196/230
.763/.709
436 hp		240/183
76.3%
74.9/91
222/270
.648/.623
494 hp
536		264/199
75.4%
82.4/99
244/293
.57/.542
543 hp
589		278/208
74.8%
86.7/103
257/307
.50/.472
572 hp
620
698		287/213
74.2%
89.6/106
265/314
.443/.415
590 hp
641
720		290/216
74.5%
90.5/107
268/318
.391/.368
597 hp
647
728		--247/184
74.5%
1.38
.409/.324
Pro Comp 210 CNC Out of Box Weingartner Racing Brez Alum210/-2.02/1.60
4.155
No Pipe		N/A62/49
79%		113/105
92.9%		160/136
85%
49.9/67.6
148/200
.576/.618
329 hp		207/172
83.1%
64.6/85.5
191/253
.559/.586
426 hp
462		250/187
74.8%
78/93
231/276
.54/.51
514 hp
558		277/189
68.2%
86.4/94
256/279
.498/.429
570 hp
618
695		284/189
66.5%
88.6/94
263/279
.438/.368
584 hp
634
713		---215/163
75.8%
1.35
.409/.324
Pro-Filer 176-21 C 23 Deg Alum210/-2.055/1.6064-129/109
84.5%		186/145
78%
56.1/72.1
166/214
.658/.659
383 hp		227/172
75.8%
68.4/85.5
203/253
.602/.586
467 hp
507		271/187
69%
81.7/93
242/276
.575/.51
557 hp
605		284/219
77.1%
85.6/109
254/323
.502/.497
584 hp
634
713		294/232
78.9%
88.6/115
263/342
.446/.452
605 hp
656
738		---232/177
76.5%
1.40
.416/.324
Pro-Filer 23 Deg Darin Morgan Ports Out of Box Int 30 deg Back cut 18 deg tulip exhaust w back cut SF600 Alum210/-2.055/1.60
-
No Pipe		62.15-62.2-143/96
67.1%		204/150
73.5%
61.5/74.6
182/221
.721/.681
420 hp		250/178
71.2%
75.4/88.5
223/262
.663/.606
514 hp
558		284/199
70.1%
85.6/99
254/293
.603/.542
584 hp
634		300/211
70.3%
90.4/105
268/311
.53/.479
617 hp
670
753		300/218
72.7%
90.4/108
268/321
.455/.424
617 hp
670
753		302/221
73.2%
91.1/110
270/326
.40/.376
621 hp
674
758		302/223
73.8%
91.1/111
270/329
.356/.338
621 hp
674
758		300/223
74.3%
90.4/111
268/329
.318/.304
617 hp
670
753		265/191
72.1%
1.44
.416/.324
Pro-Filer 23 Deg VJ Gasket Matched Ports Out Box Dr Js Perfomance AlumN/A2.08/1.60
4.155
1 3/4" Pipe		N/A74/59
79.7%		135/112
83%		197/162
82.2%
58/80.6
172/239
.688/.736
405 hp		243/189
77.8%
71.5/94
212/279
.637/.644
500 hp
542		282/205
72.7%
83/102
246/302
.591/.559
580 hp
629		290/212
73.1%
85.3/105
253/312
.507/.481
597 hp
647
728		295/221
74.9%
86.8/110
257/326
.442/.43
607 hp
658
740		299/228
76.3%
88/113
261/336
.392/.388
615 hp
667
750		--249/190
76.3%
-
.421/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Pro-Filer 23 Deg Gasket Matched Trmnatr AlumN/A2.055/1.60
4.07		N/A-143/96
67.1%		204/150
73.5%
61.5/74.6
182/221
.721/.681
420 hp		250/178
71.2%
75.4/88.5
223/262
.663/.606
514 hp
558		284/199
70.1%
85.6/99
254/293
.603/.542
584 hp
634		300/211
70.3%
90.4/105
268/311
.53/.479
617 hp
670
753		300/218
72.7%
90.4/108
268/321
.455/.424
617 hp
670
753		302/221
73.2%
91.1/110
270/326
.40/.376
621 hp
674
758		302/223
73.8%
91.1/111
270/329
.356/.338
621 hp
674
758		300/223
74.3%
90.4/111
268/329
.318/.304
617 hp
670
753		265/191
72.1%
-
.416/.324
Pro-Filer 220 CNC Air Wolf Alum220/-2.08/1.60
-
1 7/8" Pipe		6478/65
83.3%		155/116
74.8%		228/162
71.1%
67.1/80.6
199/239
.797/.736
469 hp		276/196
71%
81.2/97.5
241/289
.723/.668
568 hp
616		301/219
72.8%
88.6/109
262/323
.631/.597
619 hp
672		315/233
74%
92.7/116
275/343
.55/.529
648 hp
703
791		320/244
76.3%
94.2/121
279/360
.479/.475
658 hp
714
803		322/252
78.3%
94.8/125
281/371
.422/.429
662 hp
719
808		324/257
79.3%
95.4/128
283/379
.377/.389
667 hp
723
813		-/260280/210
74.9%
1.47
.421/.324
Pro-Filer Darin Morgan 220 CNC Air Wolf SF600 Alum220/-2.08/-N/A-155/-225/-
66.2
196
.786
463 hp		272/-
80
237
.713
560 hp
607		304/-
89.5
265
.637
625 hp
679		317/-
93.3
276
.554
652 hp
708
796		321/-
94.5
280
.481
660 hp
716
806		326/-
95.9
284
.427
671 hp
728
818		330/-
97.1
288
.384
679 hp
737
828		331/-
97.4
289
.347
681 hp
739
831		287
-
1.50
.421
Pro-Filer Darin Morgan 245 CNC Air Wolf SF600 Alum245/-2.125/-N/A-161/-231/-
65.1
193
.79
475 hp		281/-
79.2
235
.721
578 hp
627		311/-
87.7
260
.638
640 hp
694		329/-
92.8
275
.563
677 hp
734
826		339/-
95.6
283
.497
697 hp
757
851		345/-
97.3
288
.442
710 hp
770
866		349/-
98.4
292
.398
718 hp
779
876		350/-
98.7
292
.359
720 hp
781
878		300
-
1.43
.430
Pro 14 Deg as Cast235/-2.125/1.625N/A72/64
88.9%		147/105
71.4%		212/156
73.6%
59.8/75.2
177/223
.725/.698
436 hp		269/200
74.3%
75.8/96.4
225/286
.69/.671
553 hp
600		293/226
77.1%
82.6/109
245/323
.601/.606
603 hp
654		312/238
76.3%
88/115
261/340
.534/.532
642 hp
696
783		325/245
75.4%
91.6/118
272/350
.476/.47
669 hp
725
816		---260/195
75.1%
1.38
.430/.329
Pro 14 Deg CNC Ported305/-2.25/1.625N/A77/67
87%		162/119
73.5%		234/189
80.8%
58.9/91.1
174/270
.756/.845
481 hp		300/229
76.3%
75.5/110
224/327
.727/.768
617 hp
670		353/252
71.4%
88.8/122
263/360
.684/.676
726 hp
788		384/266
69.3%
96.6/128
286/380
.62/.595
790 hp
857
964		401/274
68.3%
101/132
299/391
.555/.525
825 hp
895
1006		411/281
68.4%
103/135
306/401
.498/.471
845 hp
917
1032		--321/230
71.7%
1.35
.456/.329
Pro 23 Deg as Cast Alum235/-2.055/1.60
4.03
No Pipe		64/72-129/109
84.5%		186/145
78%
56.1/72.1
166/214
.658/.659
383 hp		227/172
75.8%
68.4/85.5
203/253
.602/.586
467 hp
507		271/187
69%
81.7/93
242/276
.575/.51
557 hp
605		284/219
77.1%
85.6/109
254/323
.502/.497
584 hp
634
713		295/232
78.6%
88.9/115
264/342
.447/.452
607 hp
658
740		---232/177
76.4%
1.26
.416/.324
Pro 23 Deg as Cast AlumN/A2.055/1.60
4.03
No Pipe		64/7266/56
84.8%		134/110
82.1%		191/147
77%
57.6/73.1
171/217
.675/.668
393 hp		232/175
75.4%
69.9/87
207/258
.615/.596
477 hp
518		260/192
73.8%
78.4/95.5
232/283
.552/.523
535 hp
580		278/201
72.3%
83.8/100
248/296
.492/.456
572 hp
620
698		291/207
71.1%
87.7/103
260/305
.441/.403
599 hp
649
730		296/210
70.9%
89.2/104
264/309
.393/.358
609 hp
661
743		--240/177
73.8%
-
.416/.324
Pro 23 Deg as Cast Alum235/-2.08/1.60
4.03
No Pipe		64/7273/60
82.2%		138/114
82.6%		196/152
77.6%
57.7/75.6
171/224
.685/.69
403 hp		243/178
73.3%
71.5/88.5
212/262
.637/.606
500 hp
542		274/192
70.1%
80.6/95.5
239/283
.574/.523
564 hp
612		292/194
66.4%
85.9/96.5
255/286
.51/.441
601 hp
652
733		312/197
63.1%
91.8/98
272/290
.467/.383
642 hp
696
783		---243/171
70.6%
1.33
.421/.324
Pro Topline 220 Out of Box220/-2.02/1.60
-
No Pipe		N/A-126/89
70.6%		184/123
66.8%
57.4/61.2
170/181
.662/.559
379 hp		233/147
63.1%
72.7/73.1
215/217
.629/.501
479 hp
520		265/162
61.1%
82.7/80.6
245/239
.572/.441
545 hp
591		287/171
59.6%
89.6/85
265/252
.516/.388
590 hp
641
720		----219/138
63.2%
1.30
.409/.324
Pro Topline Iron254/-2.15/-N/A-154/117
76%		223/165
74%
61.4
182
.754
459 hp		282/216
76.6%
77.7
230
.715
580 hp
629		327/240
73.4%
90.1
267
.663
673 hp
730		351/250
71.2%
96.7
286
.593
722 hp
783
881		364/260
71.4%
100
297
.527
749 hp
812
914		---284/208
73.4%
1.43
.435
Pro Topline Ported Rons AlumN/A2.10/1.60
4.125		N/A-131/115
87.8%		184/152
82.6%
53.1/75.6
157/224
.637/.69
379 hp		229/180
78.6%
66.1/89.5
196/265
.594/.613
471 hp
511		263/198
75.3%
75.9/98.5
225/292
.546/.54
541 hp
587		291/209
71.8%
84/104
249/308
.504/.475
599 hp
649
730		303/212
70%
87.5/105
259/312
.449/.413
623 hp
676
760		305/214
70.2%
88.1/106
261/315
.396/.365
627 hp
681
766		--244/183
75%
-
.425/.324
Racer Pro 23 Deg Ported Bullet Cylinder HeadsN/A2.08/1.606871/63
88.7%		140/109
77.9%		198/155
78.3%
58.3/77.1
173/228
.692/.704
407 hp		248/187
75.4%
73/93
216/276
.65/.637
510 hp
554		278/210
75.5%
81.8/104
242/309
.583/.572
572 hp
620		293/221
75.4%
86.2/110
255/326
.512/.502
603 hp
654
735		305/229
75.1%
89.8/114
266/337
.457/.446
627 hp
681
766		---244/185
76%
-
.421/.324
Racer Pro 18 Deg Ported Bullet Cylinder Heads247/1002.15/1.606576/60
78.9%		158/112
70.9%		224/155
69.2%
61.7/77.1
183/228
.757/.704
461 hp		273/194
71.1%
75.2/96.5
223/286
.692/.661
562 hp
609		312/233
74.7%
85.9/116
255/343
.633/.635
642 hp
696		331/241
72.8%
91.2/120
270/355
.559/.547
681 hp
739
831		340/250
73.5%
93.7/124
277/368
.493/.487
699 hp
759
853		344/257
74.7%
94.8/128
281/379
.436/.438
708 hp
768
863		--283/206
72.8%
1.39/2.57
.435/.324
RHS Lightning Iron CHP200/752.06/1.607265/45
69.2%		122/91
74.6%		170/128
75.3%
51/63.7
151/189
.60/.581
350 hp		210/152
72.4%
63/75.6
187/224
.556/.518
432 hp
469		233/167
71.7%
69.9/83.1
207/246
.493/.455
479 hp
520		263/176
66.9%
78.9/87.5
234/259
.464/.40
541 hp
587
660		----200/143
71.5%
1.32/2.35
.417/.324
RHS Lightning 23 Deg Ported Bullet Cylinder Heads Iron218/912.05/1.606872/57
79.2%		140/103
73.6%		183/144
78.7%
55.4/71.6
164/212
.649/.654
376 hp		228/179
78.5%
69.1/89
205/264
.606/.61
469 hp
509		265/202
76.2%
80.3/100
238/298
.564/.551
545 hp
591		288/215
74.7%
87.3/107
259/317
.51/.488
592 hp
643
723		294/220
74.8%
89.1/109
264/324
.447/.428
605 hp
656
738		---233/177
76%
1.35/2.42
.415/.324
RHS Pro Action 23 Deg 180 SF600180/-2.02/1.60
4.20		64/7274/58
78.4%		151/101
66.9%		207/157
75.8%
64.6/78.1
191/231
.745/.713
426 hp		243/177
72.8%
75.8/88
225/261
.656/.603
500 hp
542		258/186
72.1%
80.5/92.5
239/274
.557/.507
531 hp
576		263/190
72.2%
82.1/94.5
243/280
.473/.431
541 hp
587
660		270/195
72.2%
84.3/97
250/287
.416/.38
555 hp
603
678		---232/168
72.3%
1.50
.409/.324
RHS Pro Action 23 Deg 200 SF600200/-2.02/1.60
4.20		50/64/7269/57
82.6%		134/101
75.4%		192/157
81.8%
59.9/78.1
178/231
.691/.713
395 hp		236/177
75%
73.6/88
218/261
.637/.603
485 hp
527		261/186
71.3%
81.4/92.5
241/274
.563/.507
537 hp
583		268/190
70.9%
83.6/94.5
248/280
.482/.431
551 hp
598
673		278/195
70.1%
86.7/97
257/287
.429/.38
572 hp
620
698		---228/168
73.5%
1.39
.409/.324
RHS Pro Action 23 Deg 220 SF600220/-2.02/1.60
4.20		50/64/7271/57
80.3%		146/101
69.2%		205/157
76.6%
64/78.1
190/231
.738/.713
422 hp		250/177
70.8%
78/88
231/261
.675/.603
514 hp
558		265/186
70.2%
82.7/92.5
245/274
.572/.507
545 hp
591		272/190
69.9%
84.9/94.5
251/280
.489/.431
560 hp
607
683		282/195
69.1%
88/97
261/287
.435/.38
580 hp
629
708		---237/168
70.8%
1.28
.409/.324
RHS Pro Action 23 Deg 220 Joe Sherman SF600 Iron220/-2.02/1.60N/A68/55
80.9%		128/99
77.3%		182/132
72.5%
56.8/65.7
168/195
.655/.60
374 hp		233/160
68.7%
72.7/79.6
215/236
.629/.545
479 hp
520		269/184
68.4%
83.9/91.5
249/271
.581/.501
553 hp
600		290/192
66.2%
90.5/95.5
268/283
.522/.436
597 hp
647
728		301/201
66.8%
93.9/100
278/296
.464/.391
619 hp
672
755		---234/161
69%
1.37
.409/.324
RHS Pro Action 23 Deg 228 3V Performance CNC228/-2.05/1.60
4.03
No Pipe		N/A78/60
76.9%		144/104
72.2%		199/140
70.4%
60.3/69.6
179/206
.705/.636
409 hp		249/165
66.3%
75.4/82.1
224/243
.662/.562
512 hp
556		280/188
67.1%
84.8/93.5
251/277
.596/.512
576 hp
625		302/211
69.9%
91.5/105
271/311
.535/.479
621 hp
674
758		315/214
67.9%
95.4/106
283/315
.479/.417
648 hp
703
791		---248/170
68.6%
1.38
.415/.324
RHS Pro Action 23 Deg 235 SF600235/-2.08/1.60
4.20		64/7273/60
82.2%		138/114
82.6%		196/152
77.6%
57.7/75.6
171/224
.685/.69
403 hp		243/178
73.3%
71.5/88.5
212/262
.637/.606
500 hp
542		274/183
66.8%
80.6/91
239/270
.574/.499
564 hp
612		292/191
65.4%
85.9/95
255/281
.51/.434
601 hp
652
733		312/195
62.5%
91.8/97
272/287
.467/.38
642 hp
696
783		---243/169
69.6%
1.33
.421/.324
RHS Pro Action 23 Deg 235 Meaux Racing Heads Out of Box Iron235/-2.08/1.60
4.00
No Pipe		N/A-102/85
83.3%		158/124
78.5%
46.5/61.7
138/183
.552/.563
325 hp		199/149
74.9%
58.6/74.1
174/220
.521/.508
409 hp
444		239/169
70.7%
70.3/84.1
208/249
.501/.461
492 hp
533		275/179
65.1%
80.9/89
240/264
.48/.407
566 hp
614
690		300/188
62.7%
88.3/93.5
262/277
.449/.366
617 hp
670
753		309/191
61.8%
90.9/95
269/281
.405/.325
636 hp
690
776		--226/155
68.6%
1.31
.421/.324
RHS Pro Action 23 Deg 235 Competition Engines235/-2.08/1.60
4.03		N/A-113/91
80.5%		161/119
73.9%
47.4/59.2
140/175
.563/.541
331 hp		209/141
67.5%
61.5/70.1
182/208
.548/.48
430 hp
466		248/157
63.3%
73/78.1
216/231
.52/.428
510 hp
554		281/166
59.1%
82.7/82.6
245/245
.491/.377
578 hp
627
705		293/173
59%
86.2/86
255/255
.439/.337
603 hp
654
735		---218/141
64.9%
1.25
.421/.324
RHS Pro Topline 235 CNC Out of Box Weingartner Racing235/-2.08/1.60
4.125
No Pipe		6477/59
76.6%		134/110
82.1%		187/142
75.9%
55/70.6
163/209
.653/.645
385 hp		236/168
71.2%
69.5/83.6
206/248
.618/.572
485 hp
527		274/191
69.7%
80.6/95
239/281
.574/.521
564 hp
612		306/200
65.4%
90.1/99.5
267/295
.535/.454
629 hp
683
768		318/204
64.2%
93.6/101
277/301
.476/.397
654 hp
710
798		---243/169
69.8%
1.35
.421/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
RHS 235cc GPA Jet Sprint Ported Kelford Cams IronN/A2.08/1.6064/7280/69
86.3%		147/129
87.8%		203/166
81.8%
59.7/82.6
177/245
.709/.754
418 hp		249/193
77.5%
73.3/96
217/284
.652/.657
512 hp
556		280/208
74.3%
82.4/103
244/307
.587/.567
576 hp
625		299/213
71.2%
88/106
261/314
.522/.484
615 hp
667
750		312/215
68.9%
91.8/107
272/317
.467/.419
642 hp
696
783		---248/187
75.4%
-
.421/.324
RHS Vortec 23 Deg Iron170/-1.94/1.50N/A----252/-
85.3
253
.566
518 hp
562		------
-
1.48
.393/.304
RHS Pro Torker Vortec 23 Deg SF600 Iron170/-1.94/1.50
4.20		6471/59
83.1%		144/114
79.2%		209/146
69.9%
70.7/82.6
209/245
.783/.707
430 hp		258/159
61.6%
87.3/90
259/267
.725/.578
531 hp
576		268/165
61.6%
90.7/93.4
269/277
.602/.48
551 hp
598		-----220/146
66.4%
1.58
.393/.304
RHS Pro Torker Vortec 23 Deg SF600 Iron170/-2.02/1.60
4.20		6477/74
96.1%		155/140
90.3%		220/168
76.4%
68.6/83.6
203/248
.791/.763
453 hp		263/172
65.4%
82.1/85.5
243/253
.71/.586
541 hp
587		270/174
64.4%
84.3/86.5
250/256
.583/.474
555 hp
603		-----227/164
72%
1.59
.409/.324
RHS Pro Torker 23 Deg Out of Box Weingartner Racing Brez IronN/A2.02/1.60
4.155
No Pipe		N/A70/54
77.1%		126/106
84.1%		186/143
76.9%
58/71.1
172/211
.669/.65
383 hp		222/151
68%
69.3/75.1
205/223
.599/.514
457 hp
495		254/154
60.6%
79.3/76.6
235/227
.548/.42
523 hp
567		235/155
66%
73.3/77.1
217/228
.423/.352
483 hp
525
590		----205/142
69.3%
-
.409/.324
Trick Flow G2 31500005 CARB SF600190/82-6668/53
77.9%		144/106
73.6%		206/144
69.9%
-
424 hp		242/173
71.5%
-
498 hp
540		252/195
77.4%
-
518 hp
562		257/205
79.8%
-
529 hp
574
645		----220/165
74.8%
1.35/2.50
Trick Flow 18 Deg Ultra SF600230/-2.15/1.6070------334/256
76.6%
92/127
273/377
.484/.498
687 hp
745
838		----
-
1.45
.435/.324
Trick Flow 18 Deg Ultra Race SF600250/1002.15/1.60
4.155
2" Pipe		5673/61
83.6%		144/113
78.5%		215/158
73.5%
59.2/78.6
175/233
.727/.718
442 hp		274/200
73%
75.5/99.5
224/295
.695/.681
564 hp
612		313/230
73.5%
86.2/114
255/339
.635/.627
644 hp
699		334/248
74.3%
92/123
273/365
.564/.563
687 hp
745
838		334/256
76.6%
92/127
273/377
.484/.498
687 hp
745
838		---269/201
74.7%
1.34/2.56
.435/.324
Trick Flow 18 Deg SF600 Alum250/1002.15/1.62556-144/113
78.5%		217/152
70%
59.8/73.3
177/217
.733/.68
446 hp		276/198
71.7%
76/95.5
225/283
.70/.664
568 hp
616		316/219
69.3%
87/106
258/313
.641/.588
650 hp
705		328/231
70.4%
90.3/111
268/330
.554/.517
675 hp
732
823		328/237
72.3%
90.3/114
268/339
.475/.454
675 hp
732
823		---268/192
71.5%
1.31/2.37
.435/.329
Trick Flow 18 Deg Cartridge Roll Clean-up SF600 Alum250/1002.15/1.605673/61
83.6%		144/113
78.5%		215/158
73.5%
59.2/78.6
175/233
.727/.718
442 hp		274/197
71.9%
75.5/98
224/290
.695/.671
564 hp
612		313/224
71.6%
86.2/111
255/330
.635/.61
644 hp
699		334/237
71%
92/118
273/349
.564/.538
687 hp
745
838		334/246
73.7%
92/122
273/363
.484/.479
687 hp
745
838		---269/196
72.8%
1.34/2.46
.435/.324
Trick Flow 18 Deg CNC Chamber Intake Port Match SF600 Alum250/1002.15/1.60
4.155		N/A71/-149/-221/-
60.9
180
.747
455 hp		277/-
76.3
226
.702
570 hp
618		319/-
87.9
260
.647
656 hp
712		351/-
96.7
286
.593
722 hp
783
881		343/-
94.5
280
.497
706 hp
766
861		---277
-
1.40
.435/.324
Trick Flow 18 Deg Ported TEA Alum274/1092.18/1.60N/A60/52
86.7%		131/120
91.6%		209/175
83.7%
56/87
166/258
.697/.795
430 hp		275/229
83.3%
73.7/114
218/337
.688/.78
566 hp
614		333/273
82%
89.2/136
264/402
.666/.744
685 hp
743		369/294
79.7%
98.9/146
293/433
.615/.668
759 hp
824
926		381/308
80.8%
102/153
302/454
.544/.60
784 hp
850
956		390/317
81.3%
104/158
310/467
.488/.54
802 hp
870
979		396/324
81.8%
106/161
314/477
.44/.491
815 hp
884
994		-311/255
82.1%
1.45/2.97
.441/.324
Trick Flow 18 Deg Ported TEA Alum295/1092.20/1.60N/A64/52
81.3%		133/120
90.2%		216/175
81%
56.8/87
168/258
.714/.795
444 hp		282/229
81.2%
74.2/114
220/337
.699/.78
580 hp
629		340/273
80.3%
89.4/136
265/402
.674/.744
699 hp
759		385/294
76.4%
101/146
300/433
.636/.668
792 hp
859
966		412/308
74.8%
108/153
321/454
.583/.60
848 hp
920
1034		420/317
75.5%
110/158
327/467
.52/.54
864 hp
937
1054		425/324
76.2%
112/161
331/477
.468/.491
874 hp
949
1067		-327/255
78.1%
1.44/2.97
.446/.324
Trick Flow 30400001 Alum CHP195/732.02/1.606460/43
71.7%		125/86
68.8%		174/117
67.2%
54.3/58.2
161/172
.626/.531
358 hp		215/144
67%
67.1/71.6
199/212
.58/.491
442 hp
480		239/162
67.8%
74.6/80.6
221/239
.516/.441
492 hp
533		243/175
72%
75.8/87
225/258
.437/.397
500 hp
542
610		----199/137
68.7%
1.25/2.40
.409/.324
Trick Flow 23 Deg Super Street SF600 Alum175/671.94/1.50
4.03
1 3/4" Pipe		5662/57
91.9%		127/109
85.8%		180/142
78.9%
60.9/80.4
180/238
.674/.688
370 hp		219/167
76.3%
74.1/94.5
220/280
.615/.607
451 hp
489		242/181
74.8%
81.9/102
243/303
.544/.526
498 hp
540		245/192
78.4%
82.9/109
246/322
.459/.465
504 hp
547
615		----203/158
78.1%
1.40/2.87
.393/.304
Trick Flow 23 Deg Super Street/Strip SF600 Alum195/722.02/1.6062-----254/190
74.8%
79.3/94.5
235/280
.457/.431
523 hp
567
637		-----
-
1.30/2.64
.409/.324
Trick Flow 23 Deg Super Street/Strip CNC Chamber SF600 Alum195/722.02/1.60
4.03
1 3/4" Pipe		7271/53
74.6%		142/99
69.7%		196/135
68.9%
61.2/67.1
181/199
.705/.613
403 hp		234/167
71.4%
73/83.1
216/246
.631/.569
481 hp
522		249/186
74.7%
77.7/92.5
230/274
.537/.507
512 hp
556		249/199
79.9%
77.7/99
230/293
.448/.452
512 hp
556
625		----214/157
73.5%
1.28/2.76
.409/.324
Trick Flow 23 Deg Super Race SF600 Alum215/782.08/1.60
4.155
1 7/8" Pipe		67/7266/57
86.4%		141/107
75.9%		199/145
72.9%
58.6/72.1
174/214
.695/.659
409 hp		244/175
71.7%
71.8/87
213/258
.639/.596
502 hp
545		273/190
69.6%
80.3/94.5
238/280
.572/.518
562 hp
609		282/198
70.2%
83/98.5
246/292
.493/.45
580 hp
629
708		287/203
70.7%
84.5/101
250/299
.43/.395
590 hp
641
720		---238/170
71.4%
1.33/2.60
.421/.324
Trick Flow 23 Deg Super Race CNC SF600 Alum230/782.08/1.60
4.155
1 7/8" Pipe		7069/55
79.7%		144/112
77.8%		213/158
74.2%
62.7/78.6
186/233
.744/.718
438 hp		265/195
73.6%
78/97
231/287
.694/.664
545 hp
591		296/220
74.3%
87.1/109
258/324
.621/.60
609 hp
661		305/234
76.7%
89.8/116
266/345
.533/.531
627 hp
681
766		310/240
77.4%
91.2/119
270/354
.464/.467
638 hp
692
778		---256/193
75.6%
1.35/3.08
.421/.324
Trick Flow TFS 23 Deg CHPN/A2.02/1.60N/A65/70
107%		133/102
76.7%		188/140
74.5%
58.7/69.6
174/206
.676/.636
387 hp		226/164
72.6%
70.5/81.6
209/242
.61/.559
465 hp
504		250/183
73.2%
78/91
231/270
.54/.499
514 hp
558		-----199/147
73.9%
-
.409/.324
Trick Flow R 23 Deg SF600 Alum215/782.08/1.60
-
Pipe		6766/57
86.4%		141/107
75.9%		199/145
72.9%
58.6/72.1
174/214
.695/.659
409 hp		244/175
71.7%
71.8/87
213/258
.639/.596
502 hp
545		273/190
69.6%
80.3/94.5
238/280
.572/.518
562 hp
609		282/198
70.2%
83/98.5
246/292
.493/.45
580 hp
629
708		287/203
70.7%
84.5/101
250/299
.43/.395
590 hp
641
720		---238/170
71.4%
1.33/2.60
.421/.324
Trick Flow Duttweiler 23 Deg SF600 Alum195/722.02/1.606251/58
113%		136/98
72.1%		191/136
71.2%
59.6/67.6
177/200
.687/.618
393 hp		230/163
70.9%
71.8/81.1
213/240
.621/.555
473 hp
513		253/177
70%
78.9/88
234/261
.546/.482
520 hp
565		254/190
74.8%
79.3/94.5
235/280
.457/.431
523 hp
567
637		----213/153
71.8%
1.30/2.64
.409/.324
Trick Flow Duttweiler 23 Deg CNC Chamber SF600 Alum195/722.02/1.606464/56
87.5%		138/105
76.1%		198/146
73.7%
61.8/72.6
183/215
.712/.663
407 hp		237/171
72.2%
74/85
219/252
.639/.583
488 hp
529		257/186
72.4%
80.2/92.5
238/274
.555/.507
529 hp
574		258/196
76%
80.5/97.5
239/289
.464/.445
531 hp
576
648		----218/161
73.9%
1.32/2.72
.409/.324
Trick Flow 23 Deg Ported TEA Alum200/-2.02/1.60
4.03
Pipe 1 3/4		N/A68/54
79.4%		143/117
81.8%		217/177
81.6%
67.7/88
201/261
.781/.804
446 hp		263/219
83.3%
82.1/109
243/323
.71/.746
541 hp
587		290/243
83.8%
90.5/121
268/358
.626/.662
597 hp
647		294/257
87.4%
91.7/128
272/379
.529/.584
605 hp
656
738		----241/203
83.9%
1.47
.409/.324
Trick Flow 23 Deg Ported TEA AlumN/A2.08/1.60
4.125
Pipe 2"		N/A69/52
75.4%		144/119
82.6%		210/182
86.7%
61.8/90.5
183/268
.734/.827
432 hp		260/224
86.2%
76.5/111
227/330
.681/.763
535 hp
580		300/247
82.3%
88.3/123
262/364
.629/.673
617 hp
670		314/257
81.8%
92.4/128
274/379
.549/.584
646 hp
701
788		318/262
82.4%
93.6/130
277/386
.476/.51
654 hp
710
798		---258/215
83.5%
-
.421/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
World S/R Replacement SF600 Iron170/651.94/1.50
-
No Pipe		58/67/76----232/161
69.4%
78.5/91.1
233/270
.521/.468
477 hp
518		------
-
1.36/2.48
.393/.304
World S/R Replacement SF1020 Iron170/651.94/1.50
-
No Pipe		58/67/76----220/151
68.6%
74.4/85.4
221/253
.494/.439
453 hp
491		------
-
1.29/2.32
.393/.304
World S/R Torquer SF600 Iron170/652.02/1.60
-
No Pipe		67/76----235/151
64.3%
73.3/75.1
217/223
.507/.412
483 hp
525		------
-
1.38/2.32
.409/.324
World S/R Torquer SF1020 Iron170/652.02/1.60
-
No Pipe		67/76----223/146
65.5%
69.6/72.6
206/215
.481/.398
459 hp
498		------
-
1.31/2.25
.409/.324
World S/R Torque Iron CHP171/822.02/1.60
-
No Pipe		67/7668/55
80.9%		128/100
78.1%		179/133
74.3%
55.9/66.1
165/196
.644/.604
368 hp		205/145
70.7%
64/72.1
190/214
.553/.494
422 hp
458		221/153
69.2%
69/76.1
204/225
.477/.417
455 hp
493		225/155
68.9%
70.2/77.1
208/228
.405/.352
463 hp
502
565		----192/137
71.6%
1.32/1.89
.409/.324
World S/R Torque Iron CHP171/822.02/1.60
-
Pipe		67/7668/55
80.9%		128/104
81.3%		179/140
78.2%
55.9/69.6
165/206
.644/.636
368 hp		205/156
76.1%
64/77.6
190/230
.553/.531
422 hp
458		221/166
75.1%
69/82.6
204/245
.477/.452
455 hp
493		225/170
75.6%
70.2/84.6
208/251
.405/.386
463 hp
502
565		----192/147
76.8%
1.32/2.07
.409/.324
World S/R Torquer Ported Blackstone Iron180/-1.94/1.506781/66
81.5%		151/123
81.5%		214/149
69.6%
72.4/84.3
215/250
.802/.722
440 hp		252/162
64.3%
85.3/91.7
253/272
.708/.589
518 hp
562		258/172
66.7%
87.3/97.3
259/288
.58/.50
531 hp
576		266/177
66.5%
90/100
267/297
.498/.429
547 hp
594
668		270/177
65.6%
91.3/100
271/297
.433/.368
555 hp
603
678		---235/160
68%
1.50
.393/.304
World S/R Torque Tri-Mark IronN/A2.02/1.60N/A64/53
82.8%		128/110
85.9%		176/126
71.6%
54.9/62.7
163/186
.633/.572
362 hp		194/135
69.6%
60.5/67.1
179/199
.523/.46
399 hp
433		196/136
69.4%
61.2/67.6
181/200
.423/.371
403 hp
437		198/137
69.2%
61.8/68.1
183/202
.356/.311
407 hp
442
497		----178/129
72.2%
-
.409/.324
World S/R Torque Ported Tri-Mark Stealth IronN/A2.02/1.60N/A70/59
84.3%		137/114
83.2%		188/136
72.3%
58.7/67.6
174/200
.676/.618
387 hp		220/149
67.7%
68.6/74.1
203/220
.594/.508
453 hp
491		227/155
68.3%
70.8/77.1
210/228
.49/.422
467 hp
507		230/160
69.6%
71.8/79.6
213/236
.414/.363
473 hp
513
577		----200/143
71.3%
-
.409/.324
World CHP Iron200/-2.02/1.60
-
No Pipe		N/A-132/98
74.2%		187/123
65.8%
58.4/61.2
173/181
.673/.559
385 hp		225/138
61.3%
70.2/68.6
208/203
.607/.47
463 hp
502		240/150
62.5%
74.9/74.6
222/221
.518/.409
494 hp
536		243/156
64.2%
75.8/77.6
225/230
.437/.354
500 hp
542
610		----205/133
64.8%
1.22
.409/.324
World Sportsman II SF600 Iron200/692.02/1.60
-
No Pipe		64/72-----260/176
67.7%
81.1/87.5
240/259
.468/.40
535 hp
580
653		-----
-
1.30/2.55
.409/.324
World Sportsman II Iron200/642.02/1.60
-
Pipe		64/72--187/131
70.1%
58.4/65.2
173/193
.673/.595
385 hp		225/150
66.7%
70.2/74.6
208/221
.607/.511
463 hp
502		240/164
68.3%
74.9/81.6
222/242
.518/.447
494 hp
536		243/162
66.7%
75.8/80.6
225/239
.437/.368
500 hp
542
610		----224/152
67.8%
1.22/2.56
.409/.324
World Sportsman II Cast Heads IronN/A2.02/1.60N/A64/60
93.8%		130/107
82.3%		186/123
66.1%
58/61.2
172/181
.669/.559
383 hp		212/136
64.2%
66.2/67.6
196/200
.572/.463
436 hp
473		230/142
61.7%
71.8/70.6
213/209
.496/.387
473 hp
513		231/143
61.9%
72.1/71.1
214/211
.416/.325
475 hp
516
580		235/143
60.9%
73.3/71.1
217/211
.362/.278
483 hp
525
590		---204/132
64.9%
-
.409/.324
World Sportsman II Out of Box Weingartner Racing IronN/A2.02/1.60
4.125
No Pipe		N/A72/55
76.4%		133/97
72.9%		182/128
70.3%
56.8/63.7
168/189
.655/.581
374 hp		228/145
63.6%
71.1/72.1
211/214
.615/.494
469 hp
509		257/160
62.3%
80.2/79.6
238/236
.555/.436
529 hp
574		264/183
69.3%
82.4/91
244/270
.475/.416
543 hp
589
663		263/194
73.8%
82.1/96.5
243/286
.406/.378
541 hp
587
660		---221/151
68.3%
-
.409/.324
World Sportsman II Ported Cast Heads IronN/A2.02/1.60N/A68/58
85.3%		139/118
84.9%		196/158
80.6%
61.2/78.6
181/233
.705/.718
403 hp		235/178
75.7%
73.3/88.5
217/262
.634/.606
483 hp
525		256/186
72.7%
79.9/92.5
237/274
.553/.507
527 hp
571		272/190
69.9%
84.9/94.5
251/280
.489/.431
560 hp
607
683		278/192
69.1%
86.7/95.5
257/283
.429/.374
572 hp
620
698		---229/170
74.3%
-
.409/.324
World Sportsman II Ported Iron212/-2.05/1.60
-
No Pipe		N/A--189/145
76.7%
57.3/72.1
170/214
.67/.659
389 hp		238/170
71.4%
72.1/84.6
214/251
.633/.579
490 hp
531		270/182
67.4%
81.8/90.5
242/268
.574/.496
555 hp
603		284/190
66.9%
86/94.5
255/280
.503/.431
584 hp
634
713		----245/172
70%
1.34
.415/.324
World Sportsman II Dr Js Performance Iron200/-2.02/1.60
-
Pipe		N/A65/63
96.9%		134/110
82.1%		188/130
69.1%
58.7/64.7
174/192
.676/.59
387 hp		214/143
66.8%
66.8/71.1
198/211
.577/.487
440 hp
478		224/150
67%
69.9/74.6
207/221
.484/.409
461 hp
500		231/153
66.2%
72.1/76.1
214/225
.416/.347
475 hp
516
580		234/156
66.7%
73/77.6
216/230
.361/.304
481 hp
522
587		---204/140
68.7%
1.17
.409/.324
World Sportsman II Ported Dr Js Performance IronN/A2.05/1.60
-
Pipe		N/A72/64
88.9%		140/110
78.6%		194/134
69.1%
58.8/66.6
174/197
.688/.609
399 hp		236/163
69.1%
71.5/81.1
212/240
.627/.555
485 hp
527		261/205
78.5%
79.1/102
234/302
.555/.559
537 hp
583		271/223
82.3%
82.1/111
243/329
.48/.506
557 hp
605
680		276/233
84.4%
83.6/116
248/343
.419/.454
568 hp
616
693		---230/178
77.5%
-
.415/.324
World Sportsman II Ported IronN/A2.02/1.60
4.155		N/A62/64
103%		134/118
88.1%		193/158
81.9%
60.2/78.6
178/233
.694/.718
397 hp		239/199
83.3%
74.6/99
221/293
.645/.678
492 hp
533		263/215
81.7%
82.1/107
243/317
.568/.586
541 hp
587		268/224
83.6%
83.6/111
248/330
.482/.509
551 hp
598
673		----219/183
83.3%
-
.409/.324
World Sportsman II Ported Bullet Cylinder Heads Iron219/892.05/1.606872/57
79.2%		145/105
72.4%		206/142
68.9%
62.4/70.6
185/209
.73/.645
424 hp		250/167
66.8%
75.7/83.1
224/246
.665/.569
514 hp
558		270/190
70.4%
81.8/94.5
242/280
.574/.518
555 hp
603		288/202
70.1%
87.3/100
259/298
.51/.459
592 hp
643
723		297/215
72.4%
90/107
267/317
.451/.419
611 hp
663
745		---243/170
70.1%
1.36/2.42
.415/.324
World Sportsman 200 Tri-Mark Stealth Iron200/-2.02/1.60N/A61/60
98.4%		128/113
88.3%		184/135
73.4%
57.4/67.1
170/199
.662/.613
379 hp		210/140
66.7%
65.5/69.6
194/206
.567/.477
432 hp
469		230/144
62.6%
71.8/71.6
213/212
.496/.392
473 hp
513		235/146
62.1%
73.3/72.6
217/215
.423/.332
483 hp
525
590		----197/136
68.7%
1.18
.409/.324
World Sportsman 200 Ported Tri-Mark Stealth IronN/A2.02/1.60N/A70/59
84.3%		144/120
83.3%		197/147
74.6%
61.5/73.1
182/217
.709/.668
405 hp		230/161
70%
71.8/80.1
213/237
.621/.548
473 hp
513		247/170
68.8%
77.1/84.6
228/251
.533/.463
508 hp
551		255/174
68.2%
79.6/86.5
236/256
.459/.395
525 hp
569
640		----215/154
71.9%
-
.409/.324
World Motown 220 SF600 Iron220/702.08/1.60
-
No Pipe		64------290/210
72.4%
85.3/104
253/309
.434/.409
597 hp
647
728		----
-
1.32/3.00
.421/.324
World Motown 220220/702.08/1.60N/A-125/105
84%		187/139
74.3%
55/69.1
163/205
.653/.631
385 hp		225/166
73.8%
66.2/82.6
196/245
.59/.565
463 hp
502		248/182
73.4%
73/90.5
216/268
.52/.496
510 hp
554		263/190
72.2%
77.4/94.5
229/280
.459/.431
541 hp
587
660		266/193
72.6%
78.3/96
232/284
.398/.376
547 hp
594
668		---219/163
74.2%
1.21/2.76
.421/.324
World Motown 220 Iron CHP220/792.06/1.606760/50
83.3%		123/109
88.6%		177/142
80.2%
53.1/70.6
157/209
.624/.645
364 hp		222/172
77.5%
66.6/85.5
197/253
.587/.586
457 hp
495		243/187
77%
72.9/93
216/276
.514/.51
500 hp
542		260/195
75%
78/97
231/287
.459/.443
535 hp
580
653		----205/161
78.5%
1.18/2.47
.417/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
World Motown 23 Deg SF600 Alum235/702.08/1.60
-
No Pipe		64-------304/219
72%
89.5/109
265/323
.398/.373
625 hp
679
763		---
-
1.29/3.13
.421/.324
World Motown 23 Deg SF1020 Alum235/702.08/1.60
-
No Pipe		64-------286/204
71.3%
84.2/101
249/301
.375/.347
588 hp
638
718		---
-
1.22/2.91
.421/.324
World Motown 23 Deg CNC SF600 Alum235/702.08/1.60
-
No Pipe		64-------329/238
72.3%
96.8/118
287/351
.431/.405
677 hp
734
826		---
-
1.40/3.40
.421/.324
World Motown 23 Deg CNC SF1020 Alum235/702.08/1.60
-
No Pipe		64-------306/220
71.9%
90.1/109
267/324
.401/.375
629 hp
683
768		---
-
1.30/3.14
.421/.324
World Motown 23 Deg / Kuntz CNC Alum250/902.10/1.6072-----------
-
-
.425/.324
World Motown 23 Deg Vortec SF600 Alum215/702.08/1.60
-
No Pipe		64-----283/189
66.8%
83.3/94
247/279
.494/.429
582 hp
632
710		-----
-
1.32/2.70
.421/.324
World Motown 23 Deg Vortec SF1020 Alum215/702.08/1.60
-
No Pipe		64-----265/177
66.8%
78/88
231/261
.463/.402
545 hp
591
665		-----
-
1.23/2.53
.421/.324
 
 
LSx     COPYRIGHT © 2000-2010 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS1 853 SF600 Alum200/702.00/1.5566.767/52
77.6%		122/97
79.5%		178/133
74.7%
56.7/70.5
168/209
.647/.624
366 hp		215/156
72.6%
68.4/82.7
203/245
.586/.549
442 hp
480		219/170
77.6%
69.7/90.1
207/267
.477/.478
451 hp
489		227/180
79.3%
72.3/95.4
214/283
.412/.422
467 hp
507
570		----192/147
76.6%
1.14/2.57
.405/.314
GM LS1 SF600N/A2.00/1.55
3.90
1 7/8" Pipe		N/A-136/108
79.4%		196/145
74%
62.4/76.8
185/228
.712/.68
403 hp		217/170
78.3%
69.1/90.1
205/267
.591/.598
446 hp
484		224/186
83%
71.3/98.6
211/292
.488/.523
461 hp
500		230/198
86.1%
73.2/105
217/311
.418/.464
473 hp
513
577		----201/161
80.5%
-
.405/.314
GM LS1 Alum204/702.00/1.55
3.90		N/A-148/103
69.6%		200/152
76%
63.7/80.6
189/239
.727/.713
411 hp		216/167
77.3%
68.8/88.5
204/262
.589/.587
444 hp
482		225/181
80.4%
71.6/95.9
212/284
.491/.509
463 hp
502		238/190
79.8%
75.8/101
224/298
.432/.445
490 hp
531
597		----205/159
77.2%
1.17/2.71
.405/.314
GM LS1 Alum204/702.00/1.5565-123/108
87.8%		180/147
81.7%
57.3/77.9
170/231
.654/.689
370 hp		219/172
78.5%
69.7/91.2
207/270
.597/.605
451 hp
489		231/193
83.5%
73.5/102
218/303
.504/.543
475 hp
516		-----188/155
82.3%
1.13/2.76
.405/.314
GM LS1 Alum CHP204/-2.00/1.55
-
Pipe		6583/62
74.7%		134/104
77.6%		189/136
72%
60.2/72.1
178/214
.687/.638
389 hp		222/165
74.3%
70.7/87.4
209/259
.605/.58
457 hp
495		240/179
74.6%
76.4/94.9
226/281
.523/.504
494 hp
536		252/185
73.4%
80.2/98
238/290
.458/.434
518 hp
562
632		----207/154
74.2%
1.24
.405/.314
GM LS1 Ported AP Engineering Alum235/-2.02/1.575
3.970
Pipe		N/A73/54
74%		150/111
74%		207/155
74.9%
64.6/79.6
191/236
.745/.715
426 hp		252/195
77.4%
78.6/100
233/297
.68/.675
518 hp
562		285/221
77.5%
88.9/113
263/336
.615/.612
586 hp
636		292/231
79.1%
91.1/119
270/351
.525/.533
601 hp
652
733		301/237
78.7%
93.9/122
278/360
.464/.469
619 hp
672
755		---248/192
77.3%
1.28
.409/.319
GM LS1 Ported ET Performance 215 SF600 Alum215/-2.04/1.57
3.90
No Pipe		35-7274/57
77%		152/106
69.7%		219/150
68.5%
67/77.5
199/230
.78/.694
451 hp		266/190
71.4%
81.4/98.1
241/291
.711/.66
547 hp
594		301/204
67.8%
92.1/105
273/312
.643/.567
619 hp
672		320/211
65.9%
97.9/109
290/323
.57/.488
658 hp
714
803		----252/172
68.4%
1.49
.413/.318
GM LS1 Ported ET Performance 224 SF600 Alum224/-2.02/1.57
3.90
No Pipe		6768/56
82.4%		143/112
78.3%		196/158
80.6%
61.2/81.6
181/242
.705/.731
403 hp		247/190
76.9%
77.1/98.1
228/291
.666/.66
508 hp
551		280/206
73.6%
87.4/106
259/315
.604/.572
576 hp
625		303/214
70.6%
94.5/111
280/328
.545/.495
623 hp
676
760		311/218
70.1%
97/113
288/334
.48/.432
640 hp
694
781		---247/183
74.2%
1.39
.409/.318
GM LS1 Ported ET Performance 225 SF600 Alum225/-2.08/1.57
4.00
No Pipe		35-7271/57
80.3%		153/114
74.5%		208/164
78.8%
61.2/84.7
181/251
.727/.759
428 hp		265/204
77%
78/105
231/312
.694/.708
545 hp
591		308/224
72.7%
90.6/116
269/343
.646/.622
634 hp
687		328/231
70.4%
96.5/119
286/354
.573/.535
675 hp
732
823		320/236
73.8%
94.2/122
279/361
.479/.468
658 hp
714
803		---264/196
74.1%
1.46
.421/.318
GM LS1 CNC M2 AlumN/A2.02/1.60N/A66/54
81.8%		141/114
80.9%		195/160
82.1%
60.8/79.6
180/236
.702/.727
401 hp		252/190
75.4%
78.6/94.5
233/280
.68/.647
518 hp
562		292/206
70.5%
91.1/102
270/304
.63/.561
601 hp
652		317/220
69.4%
98.9/109
293/324
.57/.50
652 hp
708
796		----239/178
74.4%
-
.409/.324
GM LS1 Ported No Rush AlumN/A2.02/1.57
-
No Pipe		N/A70/57
81.4%		151/108
71.5%		209/154
73.7%
65.2/79.5
193/236
.752/.713
430 hp		260/188
72.3%
81.1/97.1
240/288
.702/.653
535 hp
580		287/210
73.2%
89.6/108
265/321
.62/.583
590 hp
641		288/220
76.4%
89.9/114
266/337
.518/.509
592 hp
643
723		297/227
76.4%
92.7/117
275/347
.458/.45
611 hp
663
745		290/204
70.3%
90.5/105
268/312
.391/.354
597 hp
647
728		--255/187
73.6%
-
.409/.318
GM LS1 Ported No Rush AlumN/A2.02/1.57
-
Pipe		N/A70/57
81.4%		151/113
74.8%		209/167
79.9%
65.2/86.3
193/256
.752/.773
430 hp		260/212
81.5%
81.1/110
240/324
.702/.736
535 hp
580		287/233
81.2%
89.6/120
265/357
.62/.647
590 hp
641		288/249
86.5%
89.9/129
266/381
.518/.576
592 hp
643
723		297/254
85.5%
92.7/131
275/389
.458/.504
611 hp
663
745		290/204
70.3%
90.5/105
268/312
.391/.354
597 hp
647
728		--255/205
80.4%
-
.409/.318
GM LS1 Ported Bullet Cylinder Heads Stage I Alum217/852.00/1.575777/54
70.1%		144/113
78.5%		213/158
74.2%
67.8/81.6
201/242
.774/.731
438 hp		259/191
73.7%
82.4/98.7
244/292
.706/.663
533 hp
578		262/206
78.6%
83.4/106
247/315
.571/.572
539 hp
585		265/213
80.4%
84.4/110
250/326
.481/.493
545 hp
591
665		----229/176
77.1%
1.22/2.51
.405/.318
GM LS1 Ported Bullet Cylinder Heads Stage II Alum221/912.02/1.5755772/57
79.2%		141/113
80.1%		203/158
77.8%
63.3/81.1
188/240
.73/.729
418 hp		256/191
74.6%
79.9/98
237/290
.691/.661
527 hp
571		280/206
73.6%
87.4/106
259/313
.604/.57
576 hp
625		296/213
72%
92.4/109
274/324
.532/.491
609 hp
661
743		----235/176
74.9%
1.34/2.34
.409/.319
GM LS1 Ported Bullet Cylinder Heads Stage III Alum225/912.08/1.5755772/57
79.2%		141/113
80.1%		203/158
77.8%
59.7/81.1
177/240
.709/.729
418 hp		256/191
74.6%
75.3/98
223/290
.671/.661
527 hp
571		280/206
73.6%
82.4/106
244/313
.587/.57
576 hp
625		296/213
72%
87.1/109
258/324
.517/.491
609 hp
661
743		----235/176
74.9%
1.32/2.34
.421/.319
GM 5.3L CCM Alum205/-1.89/1.55
3.78		6065/52
80%		133/101
75.9%		189/134
70.9%
67.4/71
200/210
.727/.628
389 hp		208/161
77.4%
74.1/85.3
220/253
.60/.566
428 hp
464		219/175
79.9%
78.1/92.7
231/275
.505/.492
451 hp
489		223/187
83.9%
79.5/99.1
236/294
.429/.438
459 hp
498
560		----194/152
78%
1.09
.383/.314
GM 5.3L Ported West Coast Stage 1 CCM Alum209/-1.94/1.57
3.78		6065/57
87.7%		141/109
77.3%		187/150
80.2%
63.3/77.5
187/230
.701/.694
385 hp		227/175
77.1%
76.8/90.4
228/268
.638/.608
467 hp
507		256/198
77.3%
86.6/102
257/303
.575/.55
527 hp
571		252/211
83.7%
85.3/109
253/323
.472/.488
518 hp
562
632		----213/169
79.3%
1.22
.393/.318
GM 5.3L Ported Stage II ForceFed High PerformanceN/A2.02/1.57N/A67/62
92.5%		133/109
82%		194/148
76.3%
60.5/76.4
179/227
.698/.685
399 hp		242/184
76%
75.5/95
224/282
.653/.639
498 hp
540		274/205
74.8%
85.5/106
253/314
.591/.569
564 hp
612		296/220
74.3%
92.4/114
274/337
.532/.509
609 hp
661
743		----228/173
76%
-
.409/.318
GM 5.3L Ported Absoltue Speed AlumN/A2.02/1.60N/A-142/116
81.7%		203/159
78.3%
63.3/79.1
188/234
.73/.722
418 hp		256/196
76.6%
79.9/97.5
237/289
.691/.668
527 hp
571		291/215
73.9%
90.8/107
269/317
.628/.586
599 hp
649		314/228
72.6%
98/113
290/336
.565/.518
646 hp
701
788		----241/183
75.8%
-
.409/.324
GM 5.3L CNC FFHP Stage 2.5 SF600 Alum229/842.055/1.60
3.905
1 3/4" Pipe		6271/64
90.1%		148/119
80.4%		215/161
74.9%
64.8/80.1
192/237
.76/.731
442 hp		256/199
77.7%
77.2/99
229/293
.679/.678
527 hp
571		289/228
78.9%
87.1/113
258/336
.613/.621
595 hp
645		311/235
75.6%
93.8/117
278/346
.55/.534
640 hp
694
781		----244/188
77.3%
1.36/2.80
.416/.324
GM LS1 5.3L 862 Ported ET Performance SF600 Alum230/-2.055/1.57
4.00
No Pipe		64-7282/58
70.7%		162/115
71%		210/154
73.3%
63.3/79.5
188/236
.743/.713
432 hp		265/187
70.6%
79.9/96.6
237/286
.703/.649
545 hp
591		297/209
70.4%
89.5/108
265/320
.63/.58
611 hp
663		320/222
69.4%
96.5/115
286/340
.566/.514
658 hp
714
803		----251/177
70.7%
1.39
.416/.318
GM LS1 5.3L 862 Ported ForceFed SF600 AlumN/A2.00/1.55N/A-140/112
80%		202/157
77.7%
64.3/83.2
191/247
.734/.736
416 hp		247/193
78.1%
78.6/102
233/303
.673/.679
508 hp
551		282/221
78.4%
89.8/117
266/347
.615/.622
580 hp
629		296/232
78.4%
94.2/123
279/364
.538/.544
609 hp
661
743		----233/183
78.4%
-
.405/.314
GM LS1 5.3L Ported TEA Stage 1.5 AlumN/A2.02/1.57N/A67/54
80.6%		140/122
87.1%		203/172
84.7%
63.3/88.8
188/263
.73/.796
418 hp		251/218
86.9%
78.3/113
232/334
.677/.757
516 hp
560		289/244
84.4%
90.2/126
267/373
.624/.678
595 hp
645		314/260
82.8%
98/134
290/398
.565/.602
646 hp
701
788		----239/203
84.9%
-
.409/.318
GM LS1 5.3L Ported TEA Stage 2 AlumN/A2.02/1.57N/A67/57
85.1%		140/111
79.3%		208/169
81.3%
64.9/87.3
192/259
.748/.782
428 hp		252/213
84.5%
78.6/110
233/326
.68/.739
518 hp
562		290/241
83.1%
90.5/124
268/369
.626/.669
597 hp
647		317/255
80.4%
98.9/132
293/390
.57/.59
652 hp
708
796		----241/198
81.9%
-
.409/.318
GM LS1 5.3L Ported TEA Stage 3 AlumN/A-N/A67/55
82.1%		143/115
80.4%		211/157
74.4%
-
434 hp		257/201
78.2%
-
529 hp
574		299/256
85.6%
-
615 hp
667		326/276
84.7%
-
671 hp
728
818		----247/201
81.3%
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LM7 5.3L Ported West Coast Stage 2 AlumN/A1.94/1.5763-----305/223
73.1%
103/115
306/341
.571/.516
627 hp
681
766		-----
-
-
.393/.318
GM LM7 5.3L Ported West Coast Stage 2 Alum235/852.02/1.5766-----305/223
73.1%
95.2/115
282/341
.549/.516
627 hp
681
766		-----
-
1.30/2.62
.409/.318
GM LM7 LS 5.3l Ported Patriot Performance Stage I Alum213/782.00/1.5566.763/57
90.5%		128/103
80.5%		188/141
75%
59.8/74.7
177/221
.683/.661
387 hp		234/176
75.2%
74.5/93.3
221/276
.638/.619
481 hp
522		268/196
73.1%
85.3/104
253/308
.584/.551
551 hp
598		289/212
73.4%
92/112
273/333
.525/.497
595 hp
645
725		----221/166
74.8%
1.36/2.72
.405/.314
GM LS1 5.3l / 5.7L Ported Patriot Performance Stage II OLD Alum213/782.02/1.5766.767/61
91%		133/108
81.2%		194/147
75.8%
60.5/75.9
179/225
.698/.68
399 hp		242/183
75.6%
75.5/94.5
224/280
.653/.635
498 hp
540		274/205
74.8%
85.5/106
253/314
.591/.569
564 hp
612		296/220
74.3%
92.4/114
274/337
.532/.509
609 hp
661
743		----228/173
75.8%
1.39/2.82
.409/.318
GM LS1 5.3l / 5.7L Ported Patriot Performance Stage II Alum220/672.02/1.5763/6767/61
91%		133/108
81.2%		194/147
75.8%
60.5/75.9
179/225
.698/.68
399 hp		242/183
75.6%
75.5/94.5
224/280
.653/.635
498 hp
540		274/205
74.8%
85.5/106
253/314
.591/.569
564 hp
612		296/220
74.3%
92.4/114
274/337
.532/.509
609 hp
661
743		----228/173
75.8%
1.35/3.28
.409/.318
GM LS1 5.7L Ported TEA Stage 1 AlumN/A-N/A68/50
73.5%		138/105
76.1%		203/151
74.4%
-
418 hp		243/191
78.6%
-
500 hp
542		274/222
81%
-
564 hp
612		292/245
83.9%
-
601 hp
652
733		----230/183
79.5%
GM LS1 5.7L Ported TEA Stage 1.5 AlumN/A2.02/1.57N/A68/52
76.5%		139/108
77.7%		200/160
80%
62.4/82.6
185/245
.72/.741
411 hp		248/209
84.3%
77.4/108
229/320
.669/.726
510 hp
554		283/237
83.7%
88.3/122
262/363
.611/.658
582 hp
632		300/255
85%
93.6/132
277/390
.54/.59
617 hp
670
753		----234/194
82.8%
-
.409/.318
GM LS1 5.7L Ported West Coast Stage 2 AlumN/A2.02/1.5770-----293/223
76.1%
91.4/115
271/341
.527/.516
603 hp
654
735		-----
-
-
.409/.318
GM LS 5.3L 241 Weingartner Racing AlumN/A2.00/1.55
4.125
No Pipe		N/A74/54
73%		156/106
67.9%		214/151
70.6%
68.1/80
202/237
.778/.708
440 hp		252/176
69.8%
80.2/93.3
238/276
.687/.619
518 hp
562		251/187
74.5%
79.9/99.1
237/294
.547/.526
516 hp
560		256/191
74.6%
81.5/101
241/300
.465/.448
527 hp
571
643		261/195
74.7%
83.1/103
246/306
.406/.392
537 hp
583
655		---232/168
72.4%
-
.405/.314
GM LS1 5.7L 241 Advanced Induction SF600 Alum204/-2.00/1.55
3.90
No Pipe		N/A66/55
83.3%		139/101
72.7%		193/136
70.5%
61.4/72.1
182/214
.701/.638
397 hp		215/160
74.4%
68.4/84.8
203/251
.586/.563
442 hp
480		226/171
75.7%
71.9/90.6
213/269
.493/.481
465 hp
504		233/180
77.3%
74.2/95.4
220/283
.423/.422
479 hp
520
585		238/183
76.9%
75.8/97
224/287
.371/.368
490 hp
531
597		---207/155
74.8%
1.17
.405/.314
GM LS1 5.7L 241 Ported 219 Advanced Induction SF600 Alum190/-2.00/1.55
3.90
No Pipe		N/A66/54
81.8%		143/101
70.6%		208/144
69.2%
66.2/76.3
196/226
.756/.675
428 hp		251/174
69.3%
79.9/92.2
237/273
.684/.612
516 hp
560		271/197
72.7%
86.3/104
256/309
.591/.554
557 hp
605		285/209
73.3%
90.7/111
269/328
.518/.49
586 hp
636
715		287/215
74.9%
91.4/114
271/338
.447/.432
590 hp
641
720		---241/173
72%
1.51
.405/.314
GM LS1 6.0L Ported AP Engineering Stage I AlumN/A2.02/1.575
3.970		N/A66/62
93.9%		139/117
84.2%		213/161
75.6%
66.5/82.6
197/245
.766/.743
438 hp		259/200
77.2%
80.8/103
239/304
.699/.692
533 hp
578		283/219
77.4%
88.3/112
262/333
.611/.606
582 hp
632		297/229
77.1%
92.7/118
275/348
.534/.528
611 hp
663
745		305/243
79.7%
95.2/125
282/370
.47/.481
627 hp
681
766		---249/195
78.1%
-
.409/.319
GM LS1 6.0L Ported AP Engineering Alum235/902.08/1.60
4.125
Pipe		N/A75/63
84%		153/115
75.2%		217/163
75.1%
63.9/81.1
189/240
.758/.74
446 hp		265/207
78.1%
78/103
231/305
.694/.705
545 hp
591		310/243
78.4%
91.2/121
270/358
.65/.662
638 hp
692		327/262
80.1%
96.2/130
285/386
.571/.595
673 hp
730
821		328/272
82.9%
96.5/135
286/401
.491/.529
675 hp
732
823		329/273
83%
96.8/136
287/402
.431/.465
677 hp
734
826		--276/219
79.6%
1.40/3.03
.421/.324
GM LS1 6.0L Ported ET Performance Alum237/-2.055/1.57
3.90		64-7067/52
77.6%		138/112
81.2%		198/159
80.3%
59.7/82.1
177/243
.70/.736
407 hp		249/182
73.1%
75.1/94
222/279
.66/.632
512 hp
556		286/200
69.9%
86.2/103
255/306
.607/.555
588 hp
638		311/210
67.5%
93.8/108
278/321
.55/.486
640 hp
694
781		----236/173
73%
1.31
.416/.318
GM LS2 243 Ported Greg Good 2 AlumN/A2.055/1.60
4.00		N/A-147/126
85.7%		225/171
76%
67.8/85
201/252
.796/.777
463 hp		279/215
77.1%
84.1/107
249/317
.74/.732
574 hp
623		321/237
73.8%
96.8/118
287/349
.681/.646
660 hp
716		337/244
72.4%
102/121
301/360
.596/.554
693 hp
752
846		----262/199
75.9%
-
.416/.324
GM LS6N/A2.00/-N/A-156/-204/-
64.9
192
.741
420 hp		243/-
77.3
229
.662
500 hp
542		268/-
85.3
253
.584
551 hp
598		278/-
88.5
262
.505
572 hp
620
698		----230
-
-
.405
GM LS6 SF600N/A2.00/1.55
3.90
1 7/8" Pipe		N/A62/59
95.2%		126/108
85.7%		184/143
77.7%
58.6/75.8
174/225
.669/.67
379 hp		224/163
72.8%
71.3/86.4
211/256
.61/.573
461 hp
500		251/176
70.1%
79.9/93.3
237/276
.547/.495
516 hp
560		257/183
71.2%
81.8/97
242/287
.467/.429
529 hp
574
645		----208/155
74.2%
-
.405/.314
GM LS6/LS2 243 / 799 Advanced Induction SF600 Alum211/-2.00/1.55
4.00
No Pipe		N/A66/52
78.8%		139/110
79.1%		194/147
75.8%
61.8/77.9
183/231
.705/.689
399 hp		236/167
70.8%
75.1/88.5
223/262
.643/.587
485 hp
527		265/175
66%
84.4/92.7
250/275
.578/.492
545 hp
591		260/183
70.4%
82.8/97
245/287
.472/.429
535 hp
580
653		262/186
71%
83.4/98.6
247/292
.408/.374
539 hp
585
658		---226/161
71.4%
1.26
.405/.314
GM LS6/LS2 243 / 799 Ported 226 Advanced Induction SF600 Alum226/-2.00/1.55
4.00
No Pipe		N/A66/53
80.3%		146/109
74.7%		215/144
67%
68.4/76.3
203/226
.781/.675
442 hp		259/170
65.6%
82.4/90.1
244/267
.706/.598
533 hp
578		290/197
67.9%
92.3/104
274/309
.632/.554
597 hp
647		300/212
70.7%
95.5/112
283/333
.545/.497
617 hp
670
753		301/221
73.4%
95.8/117
284/347
.469/.444
619 hp
672
755		---252/176
69.7%
1.33
.405/.314
GM LS6 243 / 317 210/752.00/1.5564/71-----236/185
78.4%
75.1/98
223/290
.429/.434
485 hp
527
592		-----
-
1.12/2.47
.405/.314
GM LS6 243 / 799 Ported PRC Stage 1 SF600 Alum226.5/752.00/1.5564.572/63
87.5%		142/121
85.2%		205/154
75.1%
65.3/81.6
193/242
.745/.722
422 hp		255/191
74.9%
81.2/101
241/300
.695/.672
525 hp
569		286/214
74.8%
91/113
270/336
.624/.602
588 hp
638		305/220
72.1%
97.1/117
288/345
.554/.516
627 hp
681
766		----239/180
75.4%
-
.405/.314
GM LS6 243 / 799 Ported PRC Stage 2 SF600 Alum238/752.02/1.5764.575/66
88%		151/124
82.1%		209/160
76.6%
65.2/82.6
193/245
.752/.741
430 hp		260/194
74.6%
81.1/100
240/297
.702/.674
535 hp
580		293/217
74.1%
91.4/112
271/332
.632/.603
603 hp
654		315/227
72.1%
98.3/117
291/347
.567/.525
648 hp
703
791		----246/184
75.1%
1.32/3.03
.409/.318
GM LS6 243 Ported West Coast Stage 2 Alum233.3/86.32.02/1.57
4.03
Pipe		6970/58
82.9%		142/119
83.8%		202/167
82.7%
63/86.3
187/256
.727/.773
416 hp		246/206
83.7%
76.8/106
227/315
.664/.715
506 hp
549		288/221
76.7%
89.9/114
266/338
.622/.614
592 hp
643		312/234
75%
97.4/121
288/358
.561/.542
642 hp
696
783		----238/189
79.6%
-
.409/.318
GM LS6 243 CNC M2 Race Systems Alum235/-2.08/1.60
4.03		6466/54
81.8%		141/114
80.9%		195/160
82.1%
57.4/79.6
170/236
.681/.727
401 hp		252/190
75.4%
74.2/94.5
220/280
.66/.647
518 hp
562		292/206
70.5%
85.9/102
255/304
.612/.561
601 hp
652		319/215
67.4%
93.9/107
278/317
.557/.488
656 hp
712
801		313/220
70.3%
92.1/109
273/324
.469/.428
644 hp
699
786		---252/184
73.1%
1.36
.421/.324
GM LS6 317 VJ Milled 0.030 Weingartner Racing AlumN/A2.00/1.55
4.125
No Pipe		N/A92/69
75%		169/126
74.6%		225/159
70.7%
71.6/84.3
212/250
.818/.745
463 hp		263/180
68.4%
83.7/95.4
248/283
.717/.633
541 hp
587		267/188
70.4%
85/99.6
252/295
.582/.529
549 hp
596		268/190
70.9%
85.3/101
253/298
.487/.445
551 hp
598
673		----238/169
70.7%
-
.405/.314
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS6 317 West Coast AlumN/A2.00/1.57
4.03
No Pipe		N/A65/53
81.5%		142/112
78.9%		204/147
72.1%
64.9/75.9
192/225
.741/.68
420 hp		233/165
70.8%
74.2/85.2
220/253
.635/.573
479 hp
520		250/174
69.6%
79.6/89.9
236/266
.545/.483
514 hp
558		253/184
72.7%
80.5/95
239/282
.46/.426
520 hp
565
635		----216/156
72.3%
-
.405/.318
GM LS6 317 Ported West Coast Stage 2 Alum232.4/86.3-
4.03
Pipe		73.570/59
84.3%		145/119
82.1%		210/174
82.9%
-
432 hp		250/213
85.2%
-
514 hp
558		288/228
79.2%
-
592 hp
643		294/232
78.9%
-
605 hp
656
738		----237/193
81.4%
GM LS6 317 Ported Meaux Racing AlumN/A2.08/1.60N/A-134/117
87.3%		212/172
81.1%
62.4/85.5
185/253
.741/.781
436 hp		258/216
83.7%
75.9/107
225/318
.676/.736
531 hp
576		286/231
80.8%
84.2/115
249/340
.60/.63
588 hp
638		296/238
80.4%
87.1/118
258/351
.517/.541
609 hp
661
743		302/241
79.8%
88.9/120
263/355
.452/.469
621 hp
674
758		---248/203
81.7%
-
.421/.324
GM LS6 317 Ported Bullet Cylinder Heads AlumN/A2.00/1.575N/A96/58
60.4%		141/109
77.3%		199/148
74.4%
63.3/76
188/225
.723/.683
409 hp		241/175
72.6%
76.7/89.8
227/266
.657/.606
496 hp
538		263/189
71.9%
83.7/97
248/287
.573/.523
541 hp
587		282/210
74.5%
89.8/108
266/319
.512/.484
580 hp
629
708		----225/166
73.8%
-
.405/.319
GM LS6 CNC SDPCN/A2.00/1.55N/A67/50
74.6%		142/104
73.2%		210/150
71.4%
66.8/79.5
198/236
.763/.703
432 hp		254/185
72.8%
80.9/98
240/290
.692/.651
523 hp
567		290/203
70%
92.3/108
274/319
.632/.571
597 hp
647		286/212
74.1%
91/112
270/333
.52/.497
588 hp
638
718		----236/171
72.3%
-
.405/.314
GM LS6 Ported Stage II ForceFed High PerformanceN/A2.02/1.6059/6473/69
94.5%		143/127
88.8%		205/161
78.5%
64/80.1
190/237
.738/.731
422 hp		246/198
80.5%
76.8/98.5
227/292
.664/.675
506 hp
549		282/223
79.1%
88/111
261/329
.609/.608
580 hp
629		309/231
74.8%
96.4/115
286/340
.556/.525
636 hp
690
776		----237/188
79.3%
-
.409/.324
GM LS6 Ported TEA Stage 1 AlumN/A2.02/1.57N/A64/47
73.4%		145/114
78.6%		215/166
77.2%
67.1/85.7
199/254
.774/.768
442 hp		254/222
87.4%
79.3/115
235/340
.685/.771
523 hp
567		293/244
83.3%
91.4/126
271/373
.632/.678
603 hp
654		290/256
88.3%
90.5/132
268/392
.522/.592
597 hp
647
728		----239/200
83.7%
-
.409/.318
GM LS6 Ported TEA Stage 1.5 AlumN/A2.02/1.57N/A67/50
74.6%		139/119
85.6%		205/174
84.9%
64/89.9
190/266
.738/.805
422 hp		254/224
88.2%
79.3/116
235/343
.685/.778
523 hp
567		294/247
84%
91.7/128
272/378
.635/.686
605 hp
656		320/257
80.3%
99.9/133
296/393
.576/.595
658 hp
714
803		323/-
101
299
.498
664 hp
721
811		---256/204
-
-
.409/.318
GM LS6 Ported TEA Stage 1.5 Jasson AlumN/A2.02/1.57N/A----281/258
91.8%
87.7/133
260/395
.607/.717
578 hp
627		306/268
87.6%
95.5/138
283/410
.55/.62
629 hp
683
768		----294/263
89.6%
-
.409/.318
GM LS6 Ported TEA Stage 2 AlumN/A2.02/1.57N/A67/54
80.6%		139/120
86.3%		219/179
81.7%
68.3/92.5
202/274
.788/.829
451 hp		271/224
82.7%
84.6/116
251/343
.731/.778
557 hp
605		308/248
80.5%
96.1/128
285/380
.665/.689
634 hp
687		320/260
81.3%
99.9/134
296/398
.576/.602
658 hp
714
803		----251/206
82%
-
.409/.318
GM LS6 Ported TEA Stage 2.5 Out of Box SF600 Alum253/-2.02/1.57N/A73/59
80.8%		140/121
86.4%		205/175
85.4%
64/90.4
190/268
.738/.81
422 hp		256/228
89.1%
79.9/118
237/349
.691/.792
527 hp
571		295/264
89.5%
92.1/136
273/404
.637/.733
607 hp
658		322/278
86.3%
100/144
298/425
.579/.643
662 hp
719
808		337/-
105
312
.52
693 hp
752
846		---259/213
-
1.33
.409/.318
GM LS6 Ported TEA Stage 3 AlumN/A-N/A73/52
71.2%		148/126
85.1%		219/182
83.1%
-
451 hp		269/233
86.6%
-
553 hp
600		311/260
83.6%
-
640 hp
694		346/270
78%
-
712 hp
772
868		----259/214
82.8%
GM LS6 Ported Katech Alum240/882.10/1.55N/A75/51
68%		153/127
83%		218/167
76.6%
62.9/88.5
186/262
.754/.783
448 hp		267/207
77.5%
77.1/110
228/325
.693/.728
549 hp
596		306/221
72.2%
88.3/117
262/347
.635/.622
629 hp
683		330/230
69.7%
95.3/122
282/361
.571/.539
679 hp
737
828		----255/190
74.7%
1.38/2.61
.425/.314
GM LS6 Ported Patriot AlumN/A2.02/1.5759/6472/65
90.3%		140/124
88.6%		202/160
79.2%
63/82.6
187/245
.727/.741
416 hp		244/196
80.3%
76.1/101
226/300
.658/.68
502 hp
545		280/220
78.6%
87.4/114
259/337
.604/.611
576 hp
625		304/220
72.4%
94.9/114
281/337
.547/.509
625 hp
679
763		----234/184
78.6%
-
.409/.318
GM LS6 Ported Patriot - Demirjian Alum235/852.05/1.60
3.90
1 3/4 Pipe		6265/54
83.1%		135/102
75.6%		192/163
84.9%
58.2/81.1
172/240
.681/.74
395 hp		238/169
71%
72.1/84.1
214/249
.633/.576
490 hp
531		273/181
66.3%
82.7/90
245/267
.581/.493
562 hp
609		294/188
63.9%
89.1/93.5
264/277
.521/.427
605 hp
656
738		----226/161
70.9%
1.25/2.21
.415/.324
GM LS6 Ported Stage 3 Precision Porting Alum220/802.05/1.576091/67
73.6%		164/107
65.2%		224/161
71.9%
67.9/83.2
201/246
.794/.745
461 hp		270/192
71.1%
81.8/99.2
242/294
.718/.667
555 hp
603		305/219
71.8%
92.4/113
274/335
.649/.608
627 hp
681		298/233
78.2%
90.3/120
268/357
.528/.539
613 hp
665
748		----252/182
72.3%
1.39/2.91
.415/.318
GM LS6 Ported ET Performance Alum234/-2.02/1.57
4.155		N/A66/55
83.3%		146/120
82.2%		198/163
82.3%
61.8/84.2
183/249
.712/.755
407 hp		245/188
76.7%
76.4/97.1
227/288
.661/.653
504 hp
547		282/200
70.9%
88/103
261/306
.609/.555
580 hp
629		305/208
68.2%
95.2/107
282/318
.549/.481
627 hp
681
766		----235/176
74.7%
1.30
.409/.318
GM LS6 Ported ET Performance 234 Alum234/-2.055/1.57
3.90		N/A71/57
80.3%		137/106
77.4%		203/145
71.4%
61.2/74.9
181/222
.718/.671
418 hp		252/190
75.4%
76/98.1
225/291
.668/.66
518 hp
562		285/203
71.2%
85.9/105
255/311
.605/.564
586 hp
636		305/210
68.9%
92/108
272/321
.539/.486
627 hp
681
766		----236/171
72.3%
1.30
.416/.318
GM LS6 Ported ET Performance 237 Alum237/-2.08/1.57
4.155		N/A68/56
82.4%		151/119
78.8%		207/168
81.2%
60.9/86.8
181/257
.723/.778
426 hp		260/205
78.8%
76.5/106
227/314
.681/.712
535 hp
580		301/223
74.1%
88.6/115
262/341
.631/.619
619 hp
672		326/228
69.9%
95.9/118
284/349
.57/.528
671 hp
728
818		----249/189
75.7%
1.38
.421/.318
GM LS6 Ported Texas Speed 237 Alum237/-2.04/1.57N/A-151/124
82.1%		209/160
76.6%
63.9/82.6
189/245
.745/.741
430 hp		260/194
74.6%
79.5/100
236/297
.695/.674
535 hp
580		293/217
74.1%
89.6/112
266/332
.626/.603
603 hp
654		315/227
72.1%
96.4/117
286/347
.561/.525
648 hp
703
791		----246/184
75.1%
1.33
.413/.318
GM LS7 Ported Alum CCMN/A2.20/1.61
4.03		N/A71/60
84.5%		145/120
82.8%		222/159
71.6%
58.4/78.1
173/231
.733/.718
457 hp		271/192
70.8%
71.3/94.3
211/279
.671/.65
557 hp
605		315/207
65.7%
82.9/102
246/301
.624/.561
648 hp
703		348/219
62.9%
91.5/108
271/319
.575/.494
716 hp
777
873		352/221
62.8%
92.6/109
274/322
.498/.428
724 hp
786
883		---276/186
67.6%
-
.446/.326
GM LS7 Ported ET Performance Alum250/-2.125/1.60
4.00		35-7273/56
76.7%		154/110
71.4%		236/166
70.3%
66.5/82.6
197/245
.807/.754
485 hp		287/199
69.3%
80.9/99
240/293
.736/.678
590 hp
641		321/214
66.7%
90.5/106
268/315
.659/.583
660 hp
716		345/222
64.3%
97.3/110
288/327
.59/.504
710 hp
770
866		----269/182
67.8%
1.38
.430/.324
GM LS7 CNC Lingenfelter AlumN/A2.205/1.615
-
No Pipe		N/A-174/120
69%		256/164
64.1%
67/80.1
199/237
.844/.738
527 hp		312/200
64.1%
81.7/97.6
242/289
.771/.675
642 hp
696		352/222
63.1%
92.2/108
273/321
.696/.599
724 hp
786		384/234
60.9%
101/114
298/338
.633/.526
790 hp
857
964		396/242
61.1%
104/118
307/350
.559/.467
815 hp
884
994		---312/197
63.1%
-
.447/.327
GM LS7 CNC Lingenfelter AlumN/A2.205/1.615
-
Pipe		N/A-174/127
73%		256/180
70.3%
67/87.9
199/260
.844/.81
527 hp		312/217
69.6%
81.7/106
242/314
.771/.732
642 hp
696		352/240
68.2%
92.2/117
273/347
.696/.648
724 hp
786		384/260
67.7%
101/127
298/376
.633/.585
790 hp
857
964		396/273
68.9%
104/133
307/395
.559/.526
815 hp
884
994		---312/216
69.2%
-
.447/.327
GM LS Greg Good 245 AlumN/A2.125/1.60
4.03
No Pipe		N/A-148/117
79.1%		228/160
70.2%
64.3/79.6
190/236
.78/.727
469 hp		301/196
65.1%
84.9/97.5
251/289
.772/.668
619 hp
672		339/247
72.9%
95.6/123
283/364
.696/.673
697 hp
757		354/263
74.3%
99.8/131
296/388
.605/.597
728 hp
790
888		355/272
76.6%
100/135
297/401
.52/.529
730 hp
792
891		---288/209
72.8%
-
.430/.324
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS7 8452 12 Deg West Coast SF600 Alum259/862.20/1.61
4.155
No Pipe		70-163/115
70.6%		245/168
68.6%
64.5/82.5
191/245
.809/.758
504 hp		306/206
67.3%
80.5/101
239/300
.758/.697
629 hp
683		344/218
63.4%
90.5/107
268/317
.682/.59
708 hp
768		370/226
61.1%
97.3/111
288/329
.611/.51
761 hp
826
929		336/229
68.2%
88.4/112
262/333
.476/.443
691 hp
750
843		---294/194
65.9%
1.43/2.66
.446/.326
GM LS7 7.0l HRM Alum240/-2.10/1.60
-
No Pipe		N/A-161/113
70.2%		245/172
70.2%
70.7/85.5
210/253
.848/.781
504 hp		307/200
65.1%
88.6/99.5
263/295
.797/.681
632 hp
685		346/211
61%
99.9/105
296/311
.718/.575
712 hp
772		374/219
58.6%
108/109
320/323
.647/.497
769 hp
835
939		347/224
64.6%
100/111
297/330
.515/.436
714 hp
774
871		344/228
66.3%
99.3/113
294/336
.446/.388
708 hp
768
863		--303/195
64.4%
1.56
.425/.324
GM LQ9 Ported Patriot Stage 2 AlumN/A2.055/1.577270/66
94.3%		138/122
88.4%		200/162
81%
60.3/83.7
179/248
.707/.75
411 hp		241/203
84.2%
72.7/105
215/311
.639/.705
496 hp
538		277/227
81.9%
83.5/117
247/347
.588/.63
570 hp
618		304/235
77.3%
91.7/121
272/360
.538/.544
625 hp
679
763		----232/190
81.8%
-
.416/.318
GM LQ9 Ported Patriot Stage 3 Alum225/832.08/1.60
4.125		7276/66
86.8%		145/122
84.1%		207/163
78.7%
60.9/81.1
181/240
.723/.74
426 hp		254/205
80.7%
74.8/102
221/302
.666/.698
523 hp
567		295/229
77.6%
86.8/114
257/337
.618/.624
607 hp
658		320/236
73.8%
94.2/117
279/348
.559/.536
658 hp
714
803		----244/191
78.2%
1.42/2.84
.421/.324
GM LQ9 / LS6 / LS2 Ported Patriot Stage 2 Alum227/702.055/1.577272/66
91.7%		140/124
88.6%		202/160
79.2%
60.9/82.6
180/245
.714/.741
416 hp		246/199
80.9%
74.2/103
220/305
.652/.691
506 hp
549		280/220
78.6%
84.4/114
250/337
.594/.611
576 hp
625		304/229
75.3%
91.7/118
272/350
.538/.53
625 hp
679
763		----234/186
79.5%
1.34/3.27
.416/.318
GM LQ9 / LS6 / LS2 Ported Patriot Stage 3 Alum227/702.08/1.607275/66
88%		147/124
84.4%		209/164
78.5%
61.5/81.6
182/242
.73/.745
430 hp		255/206
80.8%
75/102
222/304
.668/.702
525 hp
569		297/229
77.1%
87.4/114
259/337
.623/.624
611 hp
663		320/235
73.4%
94.2/117
279/346
.559/.534
658 hp
714
803		----246/192
78%
1.41/3.36
.421/.324
GM LS Ported ET Performance 245 SF600 Alum245/-2.10/1.57
4.00
No Pipe		N/A73/57
78.1%		152/114
75%		209/164
78.5%
60.3/84.7
179/251
.723/.759
430 hp		266/204
76.7%
76.8/105
228/312
.69/.708
547 hp
594		312/224
71.8%
90.1/116
267/343
.648/.622
642 hp
696		338/231
68.3%
97.6/119
289/354
.585/.535
695 hp
754
848		320/236
73.8%
92.4/122
274/361
.475/.468
658 hp
714
803		---266/196
73.5%
1.38
.425/.318
GM LS Ported ET Performance 245 Redone I-45 E-50 SF600 Alum245/-2.125/1.55
4.03		64-149/-225/-
63.4
188
.769
463 hp		281/-
79.2
235
.721
578 hp
627		325/-
91.6
272
.667
669 hp
725		354/-
99.8
296
.605
728 hp
790
888		344/-
97
287
.504
708 hp
768
863		---280
-
1.44
.430/.314
GM LS Ported ET Performance 255 SF600 Alum255/-2.10/1.57
4.00
No Pipe		N/A71/55
77.5%		147/113
76.9%		227/159
70%
65.5/82.1
194/243
.786/.736
467 hp		285/213
74.7%
82.3/110
244/326
.74/.739
586 hp
636		324/229
70.7%
93.5/118
277/350
.673/.636
667 hp
723		349/236
67.6%
101/122
299/361
.604/.546
718 hp
779
876		360/242
67.2%
104/125
308/370
.534/.48
741 hp
803
904		---282/199
70.4%
1.41
.425/.318
GM LS Ported ET Performance 265 SF600 Alum265/-2.10/1.57
4.00
No Pipe		N/A73/55
75.3%		155/113
72.9%		212/159
75%
61.2/82.1
181/243
.734/.736
436 hp		271/213
78.6%
78.2/110
232/326
.703/.739
557 hp
605		323/229
70.9%
93.3/118
276/350
.671/.636
664 hp
721		352/236
67%
102/122
301/361
.609/.546
724 hp
786
883		373/242
64.9%
108/125
319/370
.553/.48
767 hp
833
936		---281/199
70.7%
1.41
.425/.318
GM LS98/76 Ported Bullet Cylinder Heads AlumN/A12.00/1.575N/A82/66
80.5%		162/114
70.4%		233/151
64.8%
74.2/77.5
220/230
.847/.697
479 hp		282/179
63.5%
89.8/91.9
266/272
.769/.619
580 hp
629		319/198
62.1%
102/102
301/301
.695/.548
656 hp
712		344/212
61.6%
109/109
324/322
.625/.489
708 hp
768
863		358/223
62.3%
114/114
338/339
.558/.441
736 hp
799
899		---283/180
63.4%
-
.405/.319
Chevy L92 Alum CCM260/902.16/1.59
4.03		7072/63
87.5%		148/126
85.1%		212/162
76.4%
57.9/81.6
171/242
.713/.74
436 hp		264/189
71.6%
72/95.2
213/282
.666/.648
543 hp
589		302/205
67.9%
82.4/103
244/306
.61/.562
621 hp
674		322/214
66.5%
87.9/108
260/319
.542/.489
662 hp
719
808		316/221
69.9%
86.2/111
256/330
.456/.433
650 hp
705
793		---261/186
71.4%
1.24/2.46
.437/.322
Chevy L92 Livernois Motorsports AlumN/A2.16/1.59
4.125		N/A79/58
73.4%		153/114
74.5%		225/147
65.3%
61.4/74
182/219
.757/.672
463 hp		276/170
61.6%
75.3/85.6
223/254
.696/.583
568 hp
616		310/183
59%
84.6/92.2
251/273
.626/.502
638 hp
692		332/189
56.9%
90.6/95.2
268/282
.559/.432
683 hp
741
833		330/193
58.5%
90.1/97.2
267/288
.476/.378
679 hp
737
828		---271/166
61.3%
-
.437/.322
Chevy L92 Weingartner Racing Brez AlumN/A2.16/1.59
4.155
No Pipe		N/A66/56
84.8%		153/114
74.5%		221/160
72.4%
60.3/80.6
179/239
.744/.731
455 hp		309/189
61.2%
84.3/95.2
250/282
.78/.648
636 hp
690		330/203
61.5%
90.1/102
267/303
.666/.557
679 hp
737		325/211
64.9%
88.7/106
263/315
.547/.482
669 hp
725
816		332/214
64.5%
90.6/108
268/319
.479/.419
683 hp
741
833		---278/182
65.3%
-
.437/.322
Chevy L92 Ported Head Shop AlumN/A2.16/1.59N/A-158/114
72.2%		221/160
72.4%
60.3/80.6
179/239
.744/.731
455 hp		280/199
71.1%
76.4/100
226/297
.707/.682
576 hp
625		312/226
72.4%
85.1/114
252/337
.63/.62
642 hp
696		337/244
72.4%
92/123
272/364
.567/.558
693 hp
752
846		346/250
72.3%
94.4/126
280/373
.499/.49
712 hp
772
868		---276/199
72.1%
-
.437/.322
Chevy L92 West Coast Alum261/902.16/1.59
4.03
2 1/2 Pipe		69.875/64
85.3%		154/126
81.8%		225/162
72%
61.4/81.6
182/242
.757/.74
463 hp		275/190
69.1%
75/95.7
222/284
.694/.651
566 hp
614		309/205
66.3%
84.3/103
250/306
.624/.562
636 hp
690		329/215
65.3%
89.8/108
266/321
.553/.491
677 hp
734
826		310/221
71.3%
84.6/111
251/330
.447/.433
638 hp
692
778		---267/187
69.9%
1.26/2.46
.437/.322
Chevy L92 West Coast Alum261/902.16/1.59
4.155
No Pipe		69.874/63
85.1%		153/121
79.1%		225/157
69.8%
61.4/79.1
182/234
.757/.718
463 hp		277/176
63.5%
75.6/88.6
224/263
.699/.603
570 hp
618		313/188
60.1%
85.4/94.7
253/281
.632/.516
644 hp
699		336/194
57.7%
91.7/97.7
272/289
.565/.443
691 hp
750
843		327/198
60.6%
89.2/99.7
264/295
.472/.388
673 hp
730
821		---272/172
63.4%
1.29/2.20
.437/.322
Chevy L92 CNC West Coast Stage 2 Alum268/99-
4.03
No Pipe		7575/63
84%		160/117
73.1%		224/182
81.3%
-
461 hp		275/213
77.5%
-
566 hp
614		308/232
75.3%
-
634 hp
687		344/243
70.6%
-
708 hp
768
863		355/248
69.9%
-
730 hp
792
891		---278/206
74.1%
1.32/2.51
Chevy L92 CNC West Coast Stage 2 Alum268/99-
4.155
No Pipe		7575/65
86.7%		160/116
72.5%		227/180
79.3%
-
467 hp		280/219
78.2%
-
576 hp
625		323/240
74.3%
-
664 hp
721		354/248
70.1%
-
728 hp
790
888		364/253
69.5%
-
749 hp
812
914		---285/209
73.5%
1.36/2.56
Chevy L92 Lingenfelter Alum261/892.165/1.59N/A-152/117
77%		222/155
69.8%
60.3/78.1
179/231
.745/.708
457 hp		272/180
66.2%
73.9/90.7
219/269
.685/.617
560 hp
607		306/191
62.4%
83.1/96.2
246/285
.616/.524
629 hp
683		328/199
60.7%
89.1/100
264/297
.551/.455
675 hp
732
823		304/202
66.4%
82.6/102
245/301
.437/.396
625 hp
679
763		---264/174
65.9%
1.26/2.27
.438/.322
Chevy L92 CNC Competition CNC Alum266/932.165/1.5968.576/58
76.3%		161/117
72.7%		229/171
74.7%
62.2/86.1
184/255
.769/.782
471 hp		282/210
74.5%
76.6/106
227/313
.71/.72
580 hp
629		323/230
71.2%
87.7/116
260/343
.651/.631
664 hp
721		343/240
70%
93.2/121
276/358
.576/.548
706 hp
766
861		353/245
69.4%
95.9/123
284/366
.508/.48
726 hp
788
886		---282/202
71.7%
1.33/2.63
.438/.322
Chevy L92 / LS3 Lingenfelter Alum261/892.165/1.59N/A-156/120
76.9%		226/158
69.9%
61.4/79.6
182/236
.759/.722
465 hp		276/183
66.3%
75/92.2
222/273
.695/.627
568 hp
616		310/194
62.6%
84.2/97.7
250/289
.624/.532
638 hp
692		332/202
60.8%
90.2/102
267/301
.557/.462
683 hp
741
833		308/205
66.6%
83.7/103
248/306
.443/.402
634 hp
687
773		---268/177
66%
1.27/2.30
.438/.322
Chevy L92 / LS3 CNC Lingenfelter Alum275/932.165/1.59
4.065		N/A-156/116
74.4%		228/160
70.2%
61.9/80.6
184/239
.765/.731
469 hp		280/199
71.1%
76.1/100
225/297
.705/.682
576 hp
625		320/218
68.1%
86.9/110
258/325
.644/.598
658 hp
714		346/229
66.2%
94/115
278/342
.581/.523
712 hp
772
868		340/235
69.1%
92.4/118
274/351
.489/.46
699 hp
759
853		---278/193
69.3%
1.26/2.53
.438/.322
Chevy L92 / LS3 CNC Lingenfelter Alum275/932.165/1.59
4.125		N/A-158/116
73.4%		230/161
70%
62.5/81.1
185/240
.772/.736
473 hp		282/201
71.3%
76.6/101
227/300
.71/.689
580 hp
629		322/220
68.3%
87.5/111
259/328
.649/.603
662 hp
719		350/231
66%
95.1/116
282/345
.587/.528
720 hp
781
878		344/237
68.9%
93.4/119
277/354
.495/.464
708 hp
768
863		---281/194
69.2%
1.27/2.55
.438/.322
Chevy L92 / LS3 Ported Head Shop AlumN/A2.165/1.59N/A--221/160
72.4%
60/80.6
178/239
.742/.731
455 hp		280/199
71.1%
76.1/100
225/297
.705/.682
576 hp
625		312/226
72.4%
84.8/114
251/337
.628/.62
642 hp
696		337/244
72.4%
91.5/123
271/364
.566/.558
693 hp
752
846		346/250
72.3%
94/126
278/373
.498/.49
712 hp
772
868		---299/216
72.1%
-
.438/.322
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Volume .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy L92 / LS3 Advanced Induction SF600 Alum260/-2.165/1.59
4.03
No Pipe		N/A80/58
72.5%		152/118
77.6%		219/157
71.7%
59.5/79.1
176/234
.735/.718
451 hp		261/183
70.1%
70.9/92.2
210/273
.657/.627
537 hp
583		280/195
69.6%
76.1/98.2
225/291
.564/.535
576 hp
625		306/202
66%
83.1/102
246/301
.514/.462
629 hp
683
768		308/207
67.2%
83.7/104
248/309
.443/.405
634 hp
687
773		---254/177
69.6%