no power-stalling

[rdstubbs]

I have a 1986 Camaro w/ a 305. I have removed the electronic carb and installed a mechanical Summit Racing rebuilt Quadrajet and HEi vacuum advance distributor (MSD Street fire). The engine is stock accept for headers and desmoging.  There are no vacuum leaks.  I've checked and adjusted the timing several times with no change. Manifold vacuum at 600 rpm is 20 in. The car runs ok up to about 1/4 throttle but hesitates badly or even stalls above that, depending on how much I push it. If I hold the throttle the condition does not improve, so I don't think it is the accelerator pump.  The carb came with .072 jets, I've replaced them with .065, same metering rods-no improvement. What size jets/metering rods came on a 1985 camaro without electronic carb? Am I on the right track? Car was not hesitating before change over, just running bad. There are no numbers on my carb but it looks exactly the same as previous just no electronics.

[Frank400]

Not an expert by any means but I think what you're experiencing is an ultra lean condition.  First thing I'd do is put back the 72 jets and try again.  Going from 72 to 65 jets is a HUGE step.   I really mean a HUGE step. Frank.

[Cliff Ruggles]

Correct, and probably in the wrong direction.  Since it's a store bought unit, difficult if not near impossible to give any advice here.  They are "generic" units, even if we knew what it was, the companies that build those "butcher" them up so often, it's complete guesswork when it comes to helping folks calibrate them......Cliff