my motor is a 350 .030 over. the heads are world product 67cc heads. the cam is a rpm performer and the pistons are .125 domed I think the compression is around 10.5 - 11.1:1 but I'm not for sure. Is 93 octane good enough fuel for this engine. I can't get full advance without detonation and I keep burning head gaskets. Can anyone answer my qustion and help with my problem. I was thinking about putting on 76cc heads to lower the compression. Will this help and will lowering the compression kill HP, or will it run better because i'll be able to get full advance.

 

add octane booster at every fillup . But that would be a pain and expensive are they Aluminum heads. If they were they should be alright on 92 octane up to 10.0:1. just try adding octane booster.

------------------
LONG LIVE THE MUSCLE CAR!!!!! MAY ITS REIGN NEVER END

1983Z28 350w/ edelbrock performer RPM power package with 64cc aluminum heads, dynomax shorty headers, 700R-4 with shift kit, 750cfm carb, edelbrock 3" exhaust system, ASCD SS hood, 16" IROC rims.

future mods:
completely done over suspension, black paint with flames, Hurst shifter, dakota digital gauge package, procharger supercharger.