Cisco
Well-Known Member
I got a new head from CDHPower. It's their cast, high compression head. It is massive compared to a stock, angle fire head. The sealing surface is pretty ruff. I will lap it smooth and shiny. The squish bevel isn't machined like the stock head. It's difficult to compare the combustion chambers, but a before and after compression test may prove if this really does increase the compression. The copper head gasket is .020" (0.5mm) thick. I'm thinking that the squish will be way over .030" using the copper gasket. I couldn't find my aluminum head gasket to measure and compare. Anyone know how thick a stock aluminum head gasket is?