84Elky, I see the small reductions but it's not a ramp down just a bit of fluctuation and then the timing comes back. I too would expect that it's a bit of VE variation causing it.

Yes, it's all good stuff. But, I still haven't seen anything that says to run to a peak timing value and then ramp it back down as the rpm further increase.

That's my belief Dave, following that post's info but ramp to max timing at 100kpa and then flat line to redline, not ramp back down.

Interesting post, but I don't understand why at full throttle (100kpa cells) you would ramp to max advance, for example 28* for Vortec or 36* for conventional at around 3000rpm, and then start...

What heads? With TBI heads you'd be better off sticking to TBI'ish timing. You'd use LT1'ish timing with fast burn type heads.