Well with my cam I am running is only pulling about 8" of vacuum at idle. Currently I'm idling at 900 rpm in gear and a/f is around 13.
I am learning.i have tried to adjust the idle with long duration cams and it's probably me but the best i could get was 13.5.With short duration cams the idle mixture screws easily adjust the af mixture to 14.5 or leaner.
