Specifications
| Intake Valve Diameter |
2.02"
|
| Intake Valve Weight |
122g
|
| Exhaust Valve Diameter |
1.60"
|
| Exhaust Valve Weight |
104g
|
| Intake Port Volume |
195cc
|
| Exhaust Port Volume |
75cc
|
| Original Combustion Chamber Size (CNC option) |
64.6cc
|
| Modified Combustion Chamber Size |
70.0cc
|
| Valve Spring Diameter |
1.47"
|
| Valve Spring Pressure - Closed (1.765" height) |
140 lbs |
| Valve Spring Pressure - Open (1.240" height) |
350 lbs |
| Valve Spring Rate |
400 lbs |
Modifications
Combustion chambers enlarged to 70cc, 5-angle competition valve job with minor bowl blending.
Modifications performed by: Ladd's Porting Service in Elkridge, MD
Airflow at 28" H2O
|
Lift
|
Intake
|
Exhaust
|
I/E Percent
|
|
.200"
|
140
|
110
|
78.6%
|
|
.300"
|
204
|
151
|
74.0%
|
|
.400"
|
239
|
174
|
72.8%
|
|
.500"
|
247
|
184
|
74.5%
|
|
.600"
|
249
|
190
|
76.3%
|
|
.700"
|
249
|
192
|
77.1%
|
