Fuel/Air screws
Question:
I am not getting a response from my fuel/air screws. I can see a difference on the vacumn guage & tune them accordinly that way, but no difference in the way the motor actaully runs. I can screw one in totally, no change to idle whatsoever. Is that normal?
Set up: Quick Fuel 950 Hp 76 primary/ 80something in secondaries blocked PV w/jet extensions. No vac advance, or other needed vacumn sorces other than guage. Secondary idle adjustment on carb is only used little.
Checked these things: no vac leaks, PV valve is good & 2.5 inches below idle vac, primary jets seem good @76 (tried 78 & they were too fat). Good seal on each screw, floats seem fine looking at the windows, needle & seat seem to be working fine... etc... what I am I doing wrong? Thanks, Scooter