3.2 heads on 3.0 compression ratio
 

Ok, I have a pretty rare engine. A factory 3.1 stamped block. Which consisted of the 97mm cylinders from the 3.3 with mahle 9.5:1 pistons. Sometime in this engines past, someone installed 3.2 liter heads. When I got the car/engine it had a custom intake with a Holley pro-jection efi kit on it. I dumped that setup and am running a Carrera intake with mega squirt to control the efi(fuel and spark) I took it a step further and turbocharged this engine. I am running 10 lbs of boost. Which yielded 402hp/360torque(e85) Obviously, with 9.5:1, that’s kind of high for an air cooled boosted setup. My question is since I am running the Carrera 3.2 heads, does this set up somehow lower overall compression of the engine from the advertised 9.5:1?

If all things are equal like single plug,stock valve size,no machine work on seal surface, both SC and 3.2 Carrera heads are close to 90cc chamber vol.
Mike Bruns

Thanks mike for the quick reply