Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: oktorque on January 06, 2015, 10:32:41 AM

Title: Edelbrock metering rods compatability
Post by: oktorque on January 06, 2015, 10:32:41 AM

It seems Cliff doesn't sell the size I was looking for, but I found them made by edelbrock.  I was wondering if they are compatible with the 1705-- post 1975 QJ's?    Does anyone know?

Thank you.

Title: Re: Edelbrock metering rods compatability
Post by: Cliff Ruggles on January 07, 2015, 04:14:43 AM

Edelbrock, to my knowledge only sells the "M" series for the later carburetors with the .036" tips.  They will only work in the SMAB models.  The other rods they sell are for the early style carbs and are too long for the later models....Cliff

Title: Re: Edelbrock metering rods compatability
Post by: oktorque on January 08, 2015, 08:46:48 AM

Thanks, Cliff.  I drilled out the idle down restrictions to make room for your new ones.  One came out fully.  The other one drilled through, but left the outside ring of the restriction in the orifice.  Is that okay to leave? 

When I drilled them I slightly disturbed the tiny surface area between the idle hole and the tiny ridge that seals the mating surface to the air horn.  It flaked up a tiny bit where the idle air bleed hole joins it.  It did not disturb the ridge, but does expose a minute area of the bleed to the surface.  Is that a problem?

I am working on a 17059272.  I switched carbs.

Title: Re: Edelbrock metering rods compatability
Post by: Cliff Ruggles on January 08, 2015, 10:17:01 AM

Use a .106" drill bit to "spin" the DCR out of the bore, it needs to be removed to install a new one.

Clean up the upper idle airbleed holes without opening them up and things will be fine.....Cliff

Title: Re: Edelbrock metering rods compatability
Post by: oktorque on January 08, 2015, 10:48:43 PM

Well, there was only a slight outer ring remaining in one hole.  I didn't know any better so I tapped in the new one.  I hope that doesn't mess it up.  I can pull it out if you think I should.

Thanks.

Title: Re: Edelbrock metering rods compatability
Post by: Cliff Ruggles on January 09, 2015, 04:14:43 AM

It will be fine as long as the new one is driven into the correct depth below the casting surface.....Cliff

Title: Re: Edelbrock metering rods compatability
Post by: oktorque on January 10, 2015, 02:08:42 PM

Thanks, Cliff. 

I have a question concerning power pistons.  In my QJ containers I have 4.  On three of them the 'arms' that hold the m.rods sit 90* to the piston.  On one, however, the arms slant upward, away from the piston, holding the rods further out of the jets.  Is that rare?

Also, you mention setting the p.piston screw at (iirc) 3 turns from seated.  What is the typical range of travel?

With your #1 recipe, in a 17059272, full size truck with an inline 300, I was thinking of starting with .072 jets and your 44 rods?  What do you think?

Title: Re: Edelbrock metering rods compatability
Post by: Cliff Ruggles on January 17, 2015, 05:28:38 AM

The PP arms should be even and level.  If they are bent up or down it was done by someone who knows nothing about rebuilding and tuning one of these carburetors, or accidentally when they pried the PP out of the carb....Cliff