Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Question on rebuild kit

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Marx3:
Hi, my Hi-perf kit contains 2 identical body to airhorn gaskets... Only difference is that one is about twice as thick as the other... So which one do I use? The thin one ( about .029) or the fat one ( about .054)?

Also, my idle holes in the baseplate, they are about 0.089-90, should I resize them to .096 for recipe 2? ( 383, 268 adv dur., 195 TF heads, EDL RPM intake )

Carb is 17080215

Thanks
-Jacob

Cliff Ruggles:
Use the thin gasket unless there is enough warpage between the parts to need the thick one.

Drill the idle bypass air for the recipe you are going to use, no worries...Cliff

Marx3:
Okay, I figured the thick one was for warped airhorns :-)

regarding my other question: I meant the holes under the mixture screws... somewhere the book says .096, but the recipe says nothing about them.

I have asked you about the bypass holes in a mail though, I just cant seem to find anything in the book, on what size to go for with recipe 2... they are .107 now...

Cliff Ruggles:
I'd leave them at .089".  Some of those later throttle bodies with the fine pitch metric threads are not tapped deep enough to allow the mixture screws to fully seat if you drill the holes out much.  I've only ran into this a few times, and ended up tapping the holes for 10-32 treads and installing the early design mixture screws.....Cliff

Marx3:
Ok, I'll leave them.

...and the idle bypass air at .107?

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