Based on the average distributor hitting a reasonable advance of the low 30s at higher RPMs. That's why I asked what his total timing was, as this is the most important timing number - which I know you already know.:prayer:
True, but since neither of us know whether he has a factory distributor, or what the curve is, one guess is nor better than the other.
I WILL agree that determining what the timing is doing, at BOTH ends would be a good step.
These types of problems can be difficult, though. ANY problem, or sum of problems, that can cause reduced spark could cause this sort of thing. Anything from poor primary supply voltage, to something as simple as a bad coil wire.
