Comp Cams recommends 10.5:1 compression for their 308R High Energy street roller which has 262* at .05 (176* at .200) and at least 11:1 for the 292XR which has 254* at .05 (176* at .200). I'm confused. Shouldn't you need more compression for the 308R since it has more seat to seat duration and less dynamic compression?