How To Figure Compression Ratio
We have a circle track close by. Maybe I'll get lucky?? Thanks!
First of all, welcome to FABO!!!
Second, that Dart is Sleeperiffic Badassness!!
Last, if the cam is a hydraulic, it can skew the cranking compression results & barely even get You in the ballpark. Cranking speed, oil pressure while cranking, engine temp, design bleed-down rate of the lifters, all affect what You'll see cranking PSI-wise. Most track engines using that whistler are almost 100% solid cams, so keep that in mind.
P.S. I was working on a couple's '70 440-6 'cuda, They shared that a station owner told them He let His buddy dump his chemical leftovers....including the thinner from cleaning out the paint guns etc., in His tanks....needless to say They never bought fuel there again..