Where did he get 16 or 16.5 from? Atmosphere is 14.7.
10.5:1 = 154.35:14.7
I got 180psi on all 4 cylinders, and I was told that was great for a car with 140k miles on it (and a supercharger). I think it's more important to have equal compression on all cylinders than high or low. Higher compression usually indicates a healthier motor in general. __________________ 
'99 Dinan M3 |