Mike Licht brought up something interesting. He said that, for whatever reason, an 'improved ignition system, distributor or otherwise' ends up adding 2 degrees of effective advance to the spark timing. I don't understand why that can't be adjusted for, but oh well. He concluded that's where the extra hp gain is coming from. Assuming that the extra advance is not causing detonation, I can see that happening.
What I also see it doing is affecting EGT. Retarding ignition timing will generally increase EGT. Advancing ignition timing will generally lower EGT.
Did I possibly just solve the 'waste spark causes higher EGT' rumor?
