Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Tuning Primary Circuit

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Zac Agee:
dave make sure you get the atp screw well heated before you attempt to move it.. I heated mine several times before i was able to remove it.

67RedC10:
I received the new jets, rods, power piston spring and APT screw from Cliff.  I installed it all and spent the evening tuning it.  My engine is running like a top now!  Thanks Cliff!!    Dave

Cliff Ruggles:
Good news!

That APT system works great, but the screw can be difficult to get out of the baseplate.

It is imperative as mentioned above to heat it up some first.  Apply heat to the underside of the airhorn with a propane torch and use some penetrating oil on the screw.  In most cases they will come right out. 

If you attempt to remove it before heating it up, often the screw will break off and it becomes nearly impossible to remove.....Cliff

Frank400:

--- Quote from: Cliff Ruggles on September 12, 2012, 05:46:35 AM ---  We remove the factory APT screw and install an external screw instead.



--- End quote ---

  do you provide this service if one sends you the baseplate ?  If so, how much and how long is the turnaround time ?  Bought a few carb kits from you in the last year and was very impressed with my results (followed your receipes, read your book many many times).  Frank.

Cliff Ruggles:
Yes, we completely rebuild them and free up the APT/install external screw.  Turn around time 1-2 days....Cliff

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