Cliff's Quadrajet Parts and Rebuild Kits

Quadrajet Problem Solving => Dialing in your rebuilt Quadrajet carburetor => Topic started by: ponchobro on February 28, 2009, 11:13:40 AM

Title: APT Screw????
Post by: ponchobro on February 28, 2009, 11:13:40 AM

Cliff,
I got ahead of myself doing the 17059253 Q-jet for the old 455 and did not count the turns on the APT before I removed it!!! Could you tell me where to set it for a good starting point????

Thanks for your help!!!!
Ken

Title: Re: APT Screw????
Post by: Schurkey on February 28, 2009, 09:06:44 PM

I'm thinking The Book suggested 2 turns from seated as a starting point.

Title: Re: APT Screw????
Post by: basiccamaro on May 20, 2009, 11:07:26 PM

I did the same thing, I just got the book shipped to me today but had removed the APT adjustment screw already without noting the setting.  I have only had enough time to quickly scan the book so far.  Do you recall what page or chapter it is that mentions this?  I need to get the carb back together quickly and get the truck back in service.
I had a guy tell me three turns out on the adjustment, but I'm still trying to do some better research. 

Thanks


B.K.

Title: Re: APT Screw????
Post by: Cliff Ruggles on May 24, 2009, 05:04:30 AM

We recomend apprx 3.5 turns up from seated as a base setting.  Use the "tip-in" procedure from the book for fine tuning.

The only time the exact factory setting applies, is when the carburetor is going back on the original application with all of the emission control devices in place and operational, and the engine is stone stock.....Cliff

Title: Re: APT Screw????
Post by: Mr.Pontiac on October 14, 2009, 03:51:32 PM

Saw the area in the book skipped right by it, sorry guys, thanks for the help!!