[PaulProe]

John
I am using a LM2 AFR to check my progress. I am running about 11.5-13.0 most all times, except when it transitions and then I am seeing spikes to 18/20

I am currently using these variables:
Idle Jet: 60
Idle Holder: 90
Main Jet: 155
Air Corrector: 120
Pump Jet: 50
Pump Bleed: 35
eTube: F11
Mix Screw Turns: 7/8

I have repeatedly confirmed fuel level. I could go to a smaller idle jet but it would really fly in the ones reported by everyone else with my engine size.
432" FE / mild roller cam (285Adv. - 225 @ .050) Almost everyone is showing 65-70 on idle jets and I am already below that.

The manifold has a vacuum plenum built into it to power the PCV system and the motor generates about 12" Hg at idle. Vacuum signal isn't a problem.

I tried a set of F16 tubes and it got worse. Tried blocking the top holes of the F11's and it didn't make much difference.

It acts like the mains need to come in a little sooner, so I tried a smaller set of air correctors (100). But that flies against the rule of thumb of Main +60 for the correctors.

How much change should I see in the engine when turning the idle screws? Right now, I can screw them all the way in and the engine idle speed/smoothness stays the same.

I've attached a shot of the transition holes, taken from above, to give you an idea on how they align with the throttle plate.

Paul