Milling Heads
06-30-2005, 02:31 PM
#2
Safety Car
it's approx -1cc for every .006" removed. Also head gasket thickness must be considered. Assuming 10.1:1 with 67cc combustion chambers and stock gasket thickness of .060", 3.905" bore, 3.622" stroke, and pistons out the hole .004" = 10.111:1. With all else the same and heads just milled .030" you would have 10.73:1.