Quote:

Dave,
I have gone as far as 30BTDC and though it did improve it still "dribbled".
I know the "509" is not that radical of a cam. In fact, it has been pretty "street friendly" at least for me. Tall gears and a high stall has also been a contributing factor Otherwise, I cannot see why it should be so bad to dial in the idle. I have read where folks have gotten 11-12" vacuum at idle with this cam but the best I ever got was 7".
Anyway, I am going to tinker a bit more and play aroud with some of these great suggestions from you guys.
I'll keep you posted.
Thanx!!



Won't matter how far you advance the timing if you have fuel dribbling into the engine. You likely aren't getting the 10+" of vacuum because of the rich condition. Try lowering the float level as suggested to start. You should not have any fuel dribbling from the boosters at idle.