Well, then that would be two of us that are completely out to lunch, my thinking is the same. Curious if there is some sort of equation that adds vehicle weight into the equation??????

I used to run a hi-revving roller cammed 289 in a '70 Maverick. Car had 'glass fenders, hood, doors, deck lid, lexan windows, weighed 2380. Had 11.5 CR and ran it on pump premium!!! Was I just lucky, or is weight that big a factor???