Quote Originally Posted by luxurysportscar View Post
How much does overbore affect overall compression ratio? I realize it will be lower, but is there any equation to determine exactly how much. If an engine is 11.0-1 on a standard 4.00 bore, what would the compression drop to on a .030, .040, or .060 overbore? Its obviously a larger diameter/ larger combustion chamber.

Brian

Why would it effect compression? When I order pistions .030 or what ever, I still pick the compression ratio. The head CC wont change.