I'd like to pick your collective brains a bit here...
Third Question
Compression ratio - what is the math behind it? If I had 150psi in a cylinder, would that mean 150 (compression) / 14.7 (ambient pressure) = 10.2 meaning a compression ratio of 10.2:1?
CR=the volume of the cylinder, head gasket volume, and combustion chamber volume divided by the volume of the combustion chamber
If you have a 396 then here is the cylinder volume 4.094 (bore)x4.094x.7854 (constant)x 3.76 (stroke)=49.493 cubic inches
As an example--chamber and gasket volume=111.2 cc (cubic centimeters) 111.2 divided by 16.386 (constant)=6.786 cubic inches
49.493 + 6.786
6.786 =8.29:1 Compression ratio
Buy a book--this came from How to Hot Rod Big block Chevys. Another is How to Rebuild Your big Block Chevy. Available through big box book stores and Jeg's Summit, et.al.
BL
