What stock heads? Casting number. Your .488" cam is not 292@.050".
Most likely 234@.050". You should be using a 3500++stall converter so you leave under full turbo boost. You will need a lot more boost to get any power , working with crappy stock heads.
start tuning with 110+ octane gas. 10-12 psi boost and 30-36deg timing.
Pump gas will require less ignition timing. 26 to 33deg. and will limit the amount of turbo boost you can run without detonation. 6 to 8psi.
start by simply locking out the distributor advance and start tuning around 28deg .
Make sure the carbor EFI is plenty rich @ WOT. 11:1 AFR @WOT (rich is safer)
Stock crappy restrictrive heads EG: 882-624 castings etc will cost you 100++ hp compared to good hi flow high prf heads.
You lack of detail and accuracy in detailing the engine combo probaily says it all.
A equal lack of engine build details is really going to limit the power made.
again start tuning using high octane 110+ gas. (so you can use boost and timing to make power with crap heads without melting pistons)
Then detune ( less timing less boost) for pump gas.
stock heads are really going to limit power.
I would have used a 224deg cam on 114 and a dual plane hi rise RPM manifold.
( a 234deg cam and single plane manifold may need up to a 5000 stall to get any real turbo boost
at launch, depending on the turbo used. The turbo AR ratio needs to be correctly matched to get a good boost response curve.
You are not going to make any real power with 5psi boost and crap stock heads.
Get some real heads for it.
Last edited by F-BIRD'88; 07-20-2012 at 04:24 PM.