Or, if you want someone to do the math for you... 9.47:1 theoretical compression ratio
assuming .015 deck height, 0.021 gasket thickness, 0.0025 piston clearance, and "flat" flat-top pistons. the "ideal" calculated cylinder pressure would be 147.49 PSIG G r a n i t e C i t y P e r f o r m a n c e custom engineered competition components ---- Jim & Chris <[EMAIL PROTECTED]> wrote: ============= Does any one know if there is a formula to figure out compression ratio ? I have a 454 , 40 over with flat top pistons, 113cc oval port open chamber heads. I did a compression test this morning with the highest reading 142 psi and lowest 131psi. Ive been curious about this for a while. Jimmy C.
