UpOnOne781

Hey i have pistons that are 9.35:1 with 64 CC heads..im lookin to get a little higher compression and was thinkin about gettin heads at 58CC or so..could ne one help me out with determining how much compression i would get or tell me how to determine it? Thanks
-jeff

UpOnOne781

bump...

monzter

Just go with a thinner head gasket .020 or something in that range

blubyou02

iTrader: (1)

its either every.3cc turns into .2 compression point it might be the other way around but im pretty sure its this way to figure your comression with combustion chamber size hope it helps.

UpOnOne781

thanks ill look into it....i found some website that calculates it but i didnt kno my piston deck clearance so i couldnt do it....

1 FMF

iTrader: (1)

you can just ballpark deck height and gasket thickness, it really doesn't matter because all you're looking for is the CR change from changing one variable.

I get 9.98 for a 58cc head,
given 9.35 for a 64cc head using a 4" bore and 3.48" stroke and whatever else results in 9.35 for CR.

UpOnOne781

its actually 4.030 and 9.35 with 64CC..i think ill just use the 64 CC heads...