I used this one- RSR Static Compression Ratio Calculator and used positive 7.5 cc's for the piston valve reliefs and -.015" for deck height since the pistons are out of the hole. It seems backwards, but that's the way the calculators work. The calculator I used doesn't take the larger bore diameter of the head gasket into consideration though. The wallace one does and produces 9.64 with my numbers. Either way, the SCR I get is 9.6-9.7:1, depending on the calculator. Obviously, the 0.1 difference is lost in the noise.
You think??? Even though the venturi and throttle bore sizes are the same as the proform? It'll be interesting to test when I go to the track. I've got a wideband to help get them both tuned well enough before the track shootout.
