Quote: Thanks,Sean! The PV I'm running is a 4.5. My vacuum is 6" at idle,in gear. RandyB
Tells me that the PV circuit is too small so you need the added jet size to cover it up.... the carb has been opened many times but I never measured the PV holes... the carb was set on the dyno to the numbers it has now EDIT I actually said it backwards the PV circuit is too big... it might have a high flow PV and it could use a standard... being that carb is old