Quote:

i used the not to fast one on my
4.15 crank
6.670 rod
12 to 1 flat top with a .484 mp hyd cam
shows cranking pressure of 200
and when i built it last year with file fit rings it showed 180-185 every cyl




might have 12:1 flat top pistons BUT what is your actual compression ratio? could be much lower than 12:1 if the block wasnt decked, head volume cc'd, too thick of a gasket etc....


It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.