IROC

Greg's '87 Camaro

Factory Options

Black paint with gold stripe & gold-trimmed 16X8 wheels

Tan cloth interior

IROC-Z package (includes .5 inch lowered ride height, special front struts, Delco-Bilstein rear gas shocks, increased spring rates, special jounce bumpers, 5 degrees of caster in front wheel alignment, "wonderbar" front frame rail stiffener, special valving in steering for increased steering effort, larger rear stabilizer bar with stiffer bushings)

305 TPI engine (190 hp and 295 lb-ft torque stock) - installed a 355 engine in '01

700R-4 transmission

2.73:1 posi-trac rear with aluminum drum brakes

T-tops

Locking trunk cover with rear speakers; comes with Delco-Bose stereo system

Modifications

Engine:
350 block from an '89 IROC-Z, bored over .030, zero decked, crank turned down .010, Speed-Pro L2304 forged pistons, 10.5 compression, LT4 PM rods, ARP Pro-Series rod bolts, Clevite bearings, Melling 10552 oil pump, ARP 2-bolt main studs, Cloyes Tru-Roller double timing set, LT4 HOT cam (218/228 duration at .050", 0.525"/0.525" lift with 1.6 rockers), Trick Flow chrome-moly pushrods, CompCams Pro Magnum 1.6 roller rockers, ARP rocker studs, Trick Flow 23-degree aluminum heads with CNC-ported combustion chambers and 1.47" valvesprings, ARP head bolts, FelPro 1010 head gaskets, TD Performance SFI-approved balancer, March underdrive crank pulley, ARP pulley bolts, B&M SFI-approved flexplate, Tommy Johnson Jr. mini-starter, GM HEI distributor, Canton 15-244T multi-baffled oil pan with Canton bolt-on pick-up

Induction and Fuel:
Cut-out airboxes, home-made ram air ducts made from sheet-metal ducting, K&N air filters, removed MAF sensor screens and fins, BBK 58mm throttle body, self-ported plenum (siamesed runner openings), self-ported SLP siamesed runners, self-ported Edelbrock intake manifold base, ARP intake bolts, Fel-Pro top end gasket set and 1205 intake gaskets, SVO 24#/hr injectors, relocated MAT sensor to intake duct, removed cold start injector, Crane adjustable fuel pressure regulator (AFPR), Walbro 255 lt/hr in-tank fuel pump

Cooling:
Edelbrock water pump, Griffin 2-core radiator with 1" tubes, 180 degree thermostat, re-routed throttle body coolant, removed heater bypass valve, manual fan switch in passenger compartment

Exhaust:
Hooker SuperComp headers and Y-pipe (#2055), ARP 3/8"-head header bolts, FelPro 1404 header gaskets, removed AIR pump and tubes, removed EGR valve and solenoid, heated oxygen sensor, Random Tech high-flow catalytic converter or gutted converter, Dynomax Super Turbo cat-back exhaust, Dynomax Ultra Flo Welded Race muffler (#17227)

Drivetrain:
HD rebuilt transmission, 2200 stall converter, B&M transmission cooler, Perma-cool 8" fan mounted to tranny cooler, GM 3.42 gears, Denny's driveshaft with 1350 U-joint and pinion yoke, Auburn Race differential, HD 28-spline axleshafts from Drivetrain Direct

Suspension:
South Side Machine sub-frame connectors, Tokico Illumina 5-way adjustable struts/shocks, J&M caster/camber plates, Hotchkis strut tower brace, Global West panhard rod & trailing arms, HD inner/outer tie rod ends, Vette Brakes tie rod adjusting sleeves, HD center link, idler arm, and ball joints, Energy Suspension polyurethane lower control arm bushings, engine mounts, transmission mount, torque arm bushing, and front and rear end link & swaybar bushings

Brakes:
Front 1LE brakes (including spindles), Earl's braided S/S front brake hoses and braided S/S rear body-to-axle brake hose, Russell speed bleeders, Ford HD brake fluid, Hawk HT-9 front pads for road course
Pix of front 1LE brakes and the Russell rear brake hose that failed in the More Pictures page.
Future: rear disc brakes

Tires/Wheels:
255/50ZR16 Kumho Ecsta Supra 712's on factory gold-trim 16X8 IROC wheels for daily driving
BF Goodrich Comp T/A R1's on gold-trim 16X8 IROC wheels for road course
205/70R15 Michelins on 15X5 Weld Pro Stars and 275/50R15 BF Goodrich Comp T/A Drag Radials on 15X8 Weld Pro Stars for drag racing

Miscellaneous:
Daytona-style fiberglass hood: pix in More Pictures page (hood damaged in crash at Indy in '03), custom home-burned computer chip using GMEPro and WinBin, Accel coil, Taylor Spiro-Pro cut-to-fit 8mm spark plug wires, Made For You spark plug wire separators (attached to centerbolt valve covers), Mobil 1 synthetic oil (10W-30), AC Delco Ultragard UPF1218 or Mobil M-302 oil filter, magnetic oil drain plug, A/C converted to R134a refrigerant, Blaupunkt Savannah stereo head unit, Pioneer 3-way 4X6 speakers in dash, Pioneer 3-way 6X9 speakers in back, fog light relay grounded to chassis (to allow fog lights to operate with high beams), Cyberdyne oil temp and tranny temp digital gauges in A-pillar gauge pod, Autometer temperature manifold for tranny temp sender

Performance

Best 1/4-mile time (355 engine, before head and intake mods): 12.47@110.31mph

Best 60' time: 1.838 seconds

Best 1/8-mile time: 7.996 seconds

Best 1/4-mile time (305 engine): 14.87@90.95mph w/ a 1.964 60' time

Dyno figures (355 engine):

290 rear wheel hp and 346 rear wheel lb-ft of torque (363 hp and 432 lb-ft of torque at the engine using 20% drivetrain loss) as measured on a DynoJet chassis dyno with current mods.

Comparisons of Dyno Runs from 305 and 355 engines (including stock and SLP runners on 355).

Pictures

The IROC when I first bought it: