Compression Ratio Chart

This chart shows the theoretical resultant static compression ratios before and after certain modifications. As there are discrepancies  in the construction of engines and in offical engine specifications this chart shown can only be used as a rough guide.

Need to know the result of a combination not listed here? like a 7A bottom end with a blacktop head and silvertop pistons?
Then feel free to ask on the S-86 forum. Signing up is not needed as guest posting is available.