Need help tuning Quickfuel carb

One other thing you should know is changing air bleeds in the Quick Fuel carb is easier and has more effect than changing the jets.

Determining Power valve should be vacuum at idle divided by two. 12- 15 vacuum 6.5 power valve, 6-8 vacuum 3.5 power valve. under 6 is a 2.5 power valve. I have a box of power valves 6.5. That is what is usually in the quick fuels when new. Never worked out for me. but we usually need a lower number for big cams.