Compression/head gasket selection. 360

jtn2655 said

I'm building a 360 for the street/ occasional track day, Edelbrock Performer RPM aluminum heads (63cc chamber) KB 107 pistons (+5.00cc), block bored 30 over, xtreme energy hi lift cam 231/237@ .50
edelbrock RpM Air Gap intake, holley 750 carb and summit racing 1 5/8 headers.

Just got block back from machine shop and was running through my compression calculator. With a .050 fel-pro Gasket I will be at approximately 10.54:1. If I step it up to a .060 head gasket it will bring me down to 10.3:1. I will run on 93 octane. Will the thicker head gasket cause any problems?

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Are you at zero deck? Above the deck? Below the deck? If so, how much?

I don’t ever trust what the piston manufacturer says about some or dish volume. If you don’t pour the cylinder you won’t know exactly what you have.

Also, some of those online calculators don’t ask for the gasket bore size. That makes a big difference.

My point is you don’t have too much CR to run on pump gas with what you have. And, you CR is probably a bit lower than what you think it is.

If you post your gasket bore and where the piston is relative to the deck I can get you a bit closer on CR. But, to know for sure you’d need to pour a cylinder.