DOH!! Q-jet problems.

[Brocky]

After reading articles on these for the last few hours, I realize I am an idiot. I removed a screw my buddy had tightened all the way down on my carb. Well he is the idiot. It clearly states not to remove it. Now I need an idea on how many turns out it has to go. Anyone? Its the primary adj screw in the center on the bottom of the pic.

 

[dyeager535]

Didn't respond earlier because I thought someone with more experience would respond, but to bring it up top and maybe give you something to start with, I believe that is the APT, or adjustable part throttle.

I'm sure I've read a couple of posts on here regarding how some have set it, try doing a search for it.

 

[Bad Karma]

Try this link, lots of good stuff. In the local files section, the Quadrajet tuning article has what you are looking for.

http://www.florida4x4.com/tech/quadrajet/index.php

 

[pauly383]

Your not supposed to touch it , but I touch mine . All I can say is in my case , it was shipped 2 turns out ( online shows most of the aftermarket ones are ) , I pass emissions with it 1/2 turn out , and run like a hot rod at 3 or more out .

Currently my setup is a good compromise at 2 3/4 turns out .

Without knowing your complete setup , its hard to say exactly where to put it .

You could try to set it as few turns out as possible , and if it has a flat spot off idle , open it more .

Now its easier to adjust if you drill the casting in the airhorn , and add a pipe plug if your carb isn't already equipped .