Compression

[diablopony]

There is an interesting article in the February Car Craft on this subject. For a small block they are saying that 175 - 185 psi is it for 92-octane gas. On big blocks, lower the psi by 15 or 20.

As noted previously, the cam can change all this and how the cam is degreed in (i.e. retarded for later intake closing).

They also provided a way to calculate static CR if you know your engine's bore, stroke, head gasket volume, cylinder head combustion chamber volume, piston deck height and piston dome volume. I think I'll just use the gauge.