Timing Curve

1) Yes, Mattax, there is the issue of what "part throttle" means, huh? :D
Just took a half turn out of the rod tree setting, went for a drive, and at about 1/3 throttle it is now going 1/2 to 1 point leaner on the A/F till about 2/3 throttle, then it's getting richer... the 13.5 or so. So we're probably good there.

I opened the air door just a wee bit more. Is that the right way to go on the TQ??? Seems like more air with bit wider opening would lean it, but still not sure how the door works next to the spray bars. Didn't change much. Still pretty rich at WOT. The motor does seem to like it, but if I can lean it a bit without having to change the jets for now I'd try that.

2) As to the curve, right now the MSD has one heavy and one light silver spring in it. Their next quicker curve uses two blue light springs the same weight, but doesn't show it coming in earlier, just steeper. The step after that is to use one silver light and a blue light spring, so I may try that, see if it helps the bottom end.

(I forgot to mention it is a 9:1 motor (actual, cc’d) so (likely) can use more total with vac. adv. than for higher compression motors, correct? And with lower compr. I've read that going higher than 50 is OK???)