I now see what you're trying to accomplish; less volume.

WOT may be fine with the smaller pump shot, but doesn't the air-gap give hesitation on less than wide-open throttle?
Just seems the opposite of what you want, no pump shot when you most need it; when the mains aren't flowing yet.
Have you thought about shaping a cam to you needs?

Quote:

I agree that the .042" primary squirter "seems" huge but I am using one of the smaller pump cams (red) and the Red/.042" combo keeps my acceleration A/F numbers in the range that I want.


Are you sure you're tuning the right circuit. I'm not sure you can judge the pump shot on a gauge.
From what I know the shot doesn't last more than a second or so.
With the engine off and looking down the throat, you should be able to see how long a WOT pump shot actually takes?

I'm sure you've seen this one?

This is the correct one, according to tuner.

Negative on the float
I did take the car for a spin on Saturday and Sunday.
Everything fine on Saturday, but on Sunday the AFRs were much leaner, right from starting?
Went from the normal 13.5 to 15.
Any idea? Blocked jet perhaps?

Last edited by Frederick; 04/04/12 10:34 AM.
383B, 9.8:1, Lunati 60302(220/226@0.050 262/268Dur, 0.475"/0.494", Stealth heads, Performer manifold, QF SS-750-AN carb, 3.31Diff, A833 4-speed manual.