Originally Posted By Rob C
"Idle mixture screws 4 turns out."
Wow! So you have larger primary jets?...

I'm running a .100 primary jet right now, and by 4 turns I mean full turns off of the screws just being seated. Normally with all my other combinations I have to run at least 6 turns to get any sort of decent/stable idle.

The ideal meetering rod @ idle turned out to be the 2005 (75-2005 - 0.065,0.055,0.040), but past idle it was just too darn rich at cruise.

So I moved to 2144 now (75-2144 - 0.069,0.061,0.050) which with the same primary jetting gave me a pretty decent all around performance and my AFR is around the 14.1 @ idle, 13.5 @ cruise and about 13.3 @ WOT.

So I want the idle/off-idle performance of the 2005 rod but primary main and high-speed performance of 2144 rod. Ideally I'd like to run the 2005 rod for the primary side (pulling 8-9" of vac @ 800RPM is great with my cam) but need to go a bit leaner on the jets, so I will try a move to 0.095 jet, while on the secondary I'll go up to 0.149, measure it and maybe drill a set out to 0.154, or more, given that my air-door openning distance right now is on the smaller side.