Hello all thought I would get some suggestions on a gen 6 454 I had rebuilt and installed in a 89 iroc-z. I am not happy with the performance I am getting out of it. The car ran a 14.6 @ 92 mph in the 1/4 took off like a rocket but half way down the track seemed like it was not gaining power. I built this engine on a small budget and this was my first build. Here is what I have.

Gen 6 454

stock bore machine shop installed rebuild kit with flat top pistons has 8.1 comp and turned stock crank.

heads are 100cc closed chamber machine shop installed lunati springs and did a 45 degree angle cut for the valves. I installed heads with fel-pro gaskets and used 1.7 adj aluminum roller rockers. With new lunati push rods.


Cam is a lunati voodoo flat tappet cam 262/268 rpm 1400-5800 lift .530-.542 sep angle 112 (I know this is a roller block and roller cam should have been used but again built on a budget and machine shop said would be fine.


Intake is a edelbrock air gap and carb is a edelbrock 800cfm carb both new.


Distrubutor is a procomp ready to run with a procomp coil.


Exhaust is new summit stock gen 6 exhaust manifolds (could not afford the $500 swap headers) goes 2 1/2 pipe to thrush glass packs and kick out in front of rear tires.


long water pump, 100amp 1 wire alternator and stock power steering pump.


Trans is a auto 700r4 with a 2200 tci stall.


Stock camaro gears believe they are 2:77


Car has 18inch rims with low pro tires.


The car does run good feels like the torque is good fun street car but would like to get a little more out of it. Thanks all.