Well, I got to drive it last night. The Edelbrock tech is full of bull. Timed advance, max pump shot and the biggest step up spring didn't do squat to what I'm calling "lean spike." I'm going to go back to manifold vacuum. I went WOT a few times and that AFR is perfect, and it feels strong.
But I feel stuck. I'm too lean on Power Mode, and too rich on Cruise mode.
On the current main jet (0.098") there's no metering rod that will make my cruise mode leaner than a 75/47 (which is what I'm running). 0.075" is as big a diameter as I can see in the manual.
If I go to a smaller main jet, I can lean the cruise, but the power mode can only get a tad richer (+3.5%). And I think I need more power mode fuel than that. That and the lean spike is annoying.
What would be great is if I could make my own custom metering rod. I would stay with my current main jet (0.098") and run something like a 78/37, and make the step higher up on the metering rod, so it starts getting fuel sooner. That change in the step location I think would help with the lean spike.
Does anyone know if there is a custom metering rod shop?
7milesout