Jammin'Trey

When i am going down a hill at approx 1/16th pedal I get this wierd surging, sounds like it might be backfiring gently too, but not the normal cackle... Very suttle.

I have a rebuilt 350 (.030) peanut cam, edelbrock 600 (fresh rebuild, 110gph pump that runs 7psi (have a trans dapt inline 1-6psi reg set for 5.5 psi))

five7kid

iTrader: (14)

That typically indicates a lean condition.

Jammin'Trey

Makes sense, Probably just a carb thing, I was wondering if it could be the lockup on the converter, I have a vacuum setup on it. I have it on a timed vacuum port, does that sound ok?

five7kid

iTrader: (14)

I prefer full manifold vacuum, and to use an adjustable vacuum advance unit to fine-tune the light-load advance to eliminate pinging.