Carter AFB 9636 ?

AHA !!

I set the passenger side float lower by 1/8 inch, and retested. It was still dripping on the pass. booster. After I got the motor warmed up, I slowed the engine down until i didnt see the booster dripping - bingo - the butterflies are open too much for the idle circuit to work, and it's pulling over the booster(s). Once I got it slowed down, i was able to adjust the idle quality by messing with the mixture screws. Damned thing. The weird thing was the idle before I reset it, was not that much faster, maybe only 850-900 rpm.

So I have finally gotten it to work and now understand what it's doing. Idle vacuum at about 750rpm is 9.5 inches. Timing is set at 10 btdc.

I am going to try and run more initial timing, to get the vacuum up and smoothed out. I realize I will have to mess with the mechanical advance slots if I run more initial. Im not running vacuum advance, and have one light mr gasket spring and the lighter of the two stock springs in the dizzy.

After that and only if needed - will try drilling some small holes in the primary butterflies. I read in a book for holleys that suggested starting with 1/16" holes in each butterfly - test, and then go from there, when dealing with a lumpy cam.

I probably wont get far with it tomorrow other than setting the timing up higher, maybe 15 btdc or so. I am going on an overseas business trip on Monday. It'll be 1-2 weeks before I screw with it more.

The cam I put in the motor is the mp 268/272 .455 lift - specs are 110 centerline 50 degrees overlap. When I called mopar they told me the duration is 228/232 at 50, so in my opinion this is not a monster cam. I would expect more vacuum/carb problems with a higher overlap - something closer to 60 degrees - this is in a 060 over 318 with 9:1 compression. I checked and verified the centerline when I installed it - straight up at 110.

Well, at least I finally have some ideas about my next steps. If you guys have some other suggestions please feel free to make them. I appreciate your thoughts, and assistance.