[tonkas69]

All above are factors to consider, Cam selection plays a lot into this, trying to maximize cylinder volume, by closing the Intake valve soon after ABDC to trap as much of the intake charge in the dynamic comp.

Set up, quench, Tunning and combo is very important, but in lesser terms you really don’t want to run anything more than 9.5 to 1 with the junk gas out there.