What should the compression ratio be on a street engine?
What should the compression ratio be on a street engine? This is a little tight but should be fine for a mild street engine that does not see engine speeds beyond 6,500 rpm. The good news is that this gasket will bump the static compression ratio up to 8.97:1 or essentially 9:1, which is worth roughly a half a point in compression. What's the static compression on a Chevy crate? With a composition head gasket, the piston 0.020-inch below deck, and a 76cc combustion chamber, and with a composition head gasket this puts the static compression at 8.5:1. This really...