Hi Comp+ X Heads+ 93 Octane possible?

Right now, I am at a correctly MEASURED compression ratio of 11.08:1 on CI heads. I can get to 11.25:1 with a quick gasket change. It will run on pump gas. Dave gets all bent about CR either because he is afraid you are not smart enough to learn how to tune an engine or, he can't do it.

Always consider the system. Every thing must be thoughtfully selected and then tuned. The single most important thing to select is the camshaft. You must understand overlap and Lobe Seperation Angle. Once you do, you will most guys are leaving big HP on the table. One from not running enough compression. The other is using the wrong Lobe Seperation Angle. The current LSA thinking is a HP loser for sure.