Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: Marx3 on July 26, 2015, 01:52:57 PM

Title: Air bleed thread size
Post by: Marx3 on July 26, 2015, 01:52:57 PM

Which tap should I buy for tapping air bleeds to accept the screw in air bleeds ?

Title: Re: Air bleed thread size
Post by: Ethan1 on July 26, 2015, 02:18:19 PM

Quote from: Marx3 on July 26, 2015, 01:52:57 PM

Which tap should I buy for tapping air bleeds to accept the screw in air bleeds ?

 What size are your air bleeds now? Size will be equal to tap size.

Title: Re: Air bleed thread size
Post by: Ethan1 on July 26, 2015, 02:19:29 PM

 But, probably no bigger than a #10 tap I would imagine.

Title: Re: Air bleed thread size
Post by: Marx3 on July 27, 2015, 01:53:38 AM

My air bleeds are .118... That's why I need to install snaller ones. I found a bunch of press-ins and a bunch of screw-ins I had lying around.
I need to know what thread size those screw in air bleeds are?

Title: Re: Air bleed thread size
Post by: Frank400 on July 27, 2015, 03:34:00 AM

I've personally reduced .120" air bleeds by tapping them 10-32, then installing new custom air bleeds made out of 10-32 brass set screws.  I've also reduced .120" air bleeds by inserting the factory idle down channel restrictions' "cups" then resizing them to desired size (.070" in my case).

   

   

Title: Re: Air bleed thread size
Post by: Marx3 on July 27, 2015, 04:05:41 AM

I prefer using the press-in's that Cliff sells, but I have a bunch of his screw-in's lying around and I might as well use them. I just need to know what thread size they have... the air screw-in bleeds that Cliff sells...

Title: Re: Air bleed thread size
Post by: Ethan1 on July 27, 2015, 07:57:55 PM

Quote from: Marx3 on July 27, 2015, 04:05:41 AM

I prefer using the press-in's that Cliff sells, but I have a bunch of his screw-in's lying around and I might as well use them. I just need to know what thread size they have... the air screw-in bleeds that Cliff sells...

 Cliff would be best to answer then, since he sells them.

Title: Re: Air bleed thread size
Post by: 77cruiser on July 28, 2015, 03:48:50 AM

I think 8-32 is the size you want.

Title: Re: Air bleed thread size
Post by: Marx3 on July 28, 2015, 06:25:58 AM

Thanks 77cruiser.
yeah, Cliff would know, but I figured people in here had installed them plenty of times, so someone would know too.

Title: Re: Air bleed thread size
Post by: Cliff Ruggles on July 28, 2015, 07:21:53 AM

We sell them in 4-40, 6-32, 8-32, and 10-32.  8-32 is the most popular to use for DCR's and MAB's......Cliff

Title: Re: Air bleed thread size
Post by: Marx3 on July 28, 2015, 08:42:51 PM

Oh, I didn't know there were different sizes!
I will try an 8-32 tap first. Thanks.

Title: Re: Air bleed thread size
Post by: Marx3 on August 03, 2015, 05:56:46 AM

Is it UNF, UNC or?

Title: Re: Air bleed thread size
Post by: Ethan1 on August 03, 2015, 04:17:38 PM

Quote from: Marx3 on August 03, 2015, 05:56:46 AM

Is it UNF, UNC or?

 For which size? All but the 10-32 are UNC. The 10-32 is UNF.

Title: Re: Air bleed thread size
Post by: Marx3 on August 04, 2015, 12:52:19 AM

the 8-32... but thanks for the info on the rest.