Not Ranked
Okay, I took your advice and went back out there, set the timing at full advance (3000 RPM just to be safe) and at 38 degrees. (builder wanted 40, again I put it lower just to be safe). And set the idle again at 1000 RPM (975-1050 really) F/A ratio at 14.0-14.5 at idle and cruised for 20-30 minutes. It runs awesome! instant throttle response, idles fine and no run-on. But it's a cool day, let's see what happens at 80-90 degrees out. . . but it looks like I am down to fine tuning now.
I have mechanical advance only, a Holley HP4150 Ultra with 73 main jets, all else is stock, the way it came out of the box.
Thank you for the idea and it's good to know it's not a bad distributor, but a "characteristic". Perhaps because it was built for drag racing and not cruising around town?
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