Engine Combustion Chamber to Compression estimator?

Jan 14, 2018
16
1
3
47
Cleveland, OH
#1
Is there an easy rule regarding how many points of compression are added based on the size of the combustion chamber? In other words if you have a stock 9:1 CR with 64 CC chamber, how much to you gain with a 60, 58, 55 CC and so on...
 
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Jan 14, 2018
16
1
3
47
Cleveland, OH
#3
OK, dome volume and deck clearance? How do I determine that? The engine in question is an older M-6007-B351 GT40 351 crate engine. It was a factory 9.0 CR with the cast iron GT40 heads. So essentially I'm thinking of trying to hit 10 or 10.25 CR with a tighter chamber.
 

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