Quote:

I thought 1 1/2 turns was the factory setting.
What are your results on 2 1/2 turns out?



1-1/2 turns probably is the factory setting but a larger cam with poor vacuum is NOT a factory setting. I just know by my experience with Holleys and SIX PAK's that with a cam such as a MP280 to a MP509 or anything bigger likely won't run worth beans with 1.5 to 2.5 turns. I could go check my Holley right now and I bet it's at 3 turns or so. I 'll check what we have my Dad's SIX PAK set at too, that may take a day or so though.
I cured most of my buddy's driving and starting issues on his 460 ford by giving it a little timing and an extra turn out on the idle mix screws.

Don.