General Category > Quadrajet Carb Talk and Tips
Dance steps, need some help!
77cruiser:
If you make the threads just deep enough to get the screws flush you don't have to lock tite them.
Since you have a bunch of setscrews you can plug the UIAB & drill the air horn & make the bleeds ajustable to fine tune transition without taking the top off.
Cadman-iac:
--- Quote from: 77cruiser on October 19, 2025, 05:39:55 PM ---I'd go back to .048 UIAB.
--- End quote ---
Before I make any modifications to this bowl, I wanted to make sure I understand which way I should go with both the upper and lower idle air bleeds.
As I'm reading this, I should go back to the original upper bleed size of .048, and shrink the lower bleeds to something like .060-.063, is that correct?
I'm also going to go back to an IDCR size of .052+/- as Kenth suggested as well as slightly smaller idle tubes of .038.
I'm also going to make the bypass air passages around .040.
This should get me back to a close to stock setup and then I can see what I need.
Hopefully this will get me back on the right track. What do you guys think?
Cadman-iac:
--- Quote from: 77cruiser on October 21, 2025, 04:15:15 PM ---If you make the threads just deep enough to get the screws flush you don't have to lock tite them.
Since you have a bunch of setscrews you can plug the UIAB & drill the air horn & make the bleeds ajustable to fine tune transition without taking the top off.
--- End quote ---
You wouldn't have a picture of exactly where you placed your set screws in the air horn would you? I like that idea.
Also, i was playing around with some old junk bowls trying different ways of making the lower bleeds smaller. I gave the check ball method another shot, still don't like the results.
Then I remembered that I had a box of aluminum hammer rivets, so I tried using those to fill the holes and then redrilling to the correct size. It actually turned out pretty good, but I'm still getting the brass set screws, I'd rather be able to remove the screws to change the sizes. My aluminum rivet method works if you don't have to go back and make it smaller again. It's not impossible, just difficult.
Thanks for your help.
Rick
77cruiser:
I think it shows how in Cliffs book if you have it.
Cadman-iac:
--- Quote from: 77cruiser on October 21, 2025, 06:03:01 PM ---I think it shows how in Cliffs book if you have it.
--- End quote ---
Yeah, I just found the picture in his book. I was just wanting to see how it looked from the top side.
I'll try it on an old core I've got.
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