pabear89 said:What you need is the spring tension set to control the timing advance.
not just the movement travel amount.
20 Bucks for something that is alomst a must have item.
Might keep you from pulling your Hair out.
PB
Right you are, I should get off my posterior and get one today.
As for springs, yes that's part of the equation but, The mechanical springs don't act on the breaker plate. They act on the shaft cam. Springs don't control the total, just at what RPM it happens. Right? Now maybe the springs are still limiting travel at my problem RPM. I should look into that. But I really think its the added advance that the ported vacuum adds that is causing ping.