Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Asking for Setup Help Please

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Shiny:
OK, thanks.

I'll back the APT back out for now.

I used the idle tubes as supplied, .034", correct?

I'll drill them out and open the downchannel.

Cliff Ruggles:
Correct, we don't pre-drill them unless requested so you'll need to drill them......Cliff

Shiny:
Thanks again

I don't trust being able to pull them out without damaging, but will try.

I ordered some from your shop yesterday, pre-drilled to 0.037".

Down-channel restrictions have been drilled out to 0.055"

I'm also having trouble sealing the inlet.  Makes me laugh as you helped me with that same issue when I first rebuilt the carb.  Whoever answered the phone told me the rubberized aluminum gaskets only go on one way!  I'll have to check this, as I was unaware.  I've also got some nylon and fiber versions as options.

Shiny:
Also, I set the float kind of low, at 3/8" per the factory spec for this carb in the original application.

Your book says to set higher if unknown (~1/4"), but I understood trying to follow the factory spec was a starting point.

I'm also curious about TCS.  My car still has the TCS valve and I have it hooked up.  Do I need it or should I bypass?  It is fed by manifold vacuum at the back of the carb, then feeds the distributor advance.

Shiny:
question about my inlet sealing problem

carb sealing face is larger diameter (OD is almost 1 1/8") than the face on the inlet fitting (OD is 1")

is this by design or do I need a different fitting?  Seems unexpected to me.. I'd think the two sealing faces should clamp the gasket uniformly..

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