Notice there is no difference in the size of that hole that passes fuel from the 390cfm to the 950HP. There could be 30 or more jet numbers difference in the carbs, but the PV is the same size hole?
Moper are you referring to the power valve channel restrictors? If so have you ever measured them or just eyeballed them? I have measured them on several different carbs and have found differences in the PVCR sizes. I've measured them from .035"~.060". There are billet metering blocks on the market that allows you to change the sizes of them to find that proper flat fuel curve.
