Quadrajet rebuild questions

[SilveradoDude]

Hey guys I have my Quadrajet disassembled cleaned, new parts bought and ready to re-assemble. I have a few questions though:

1. Do I just lay the needle there with no hanger I have heard it is better without the hanger?

2. The Power Valve set screw has been altered, how to properly calibrate it?

[geezer#99]

You need the hanger clip and it needs to be hooked to the float correctly.
Info in here.
http://www.crankshaftcoalition.com/w...4MV_carburetor

[SilveradoDude]

Originally Posted by geezer#99

You need the hanger clip and it needs to be hooked to the float correctly.
Info in here.
http://www.crankshaftcoalition.com/w...4MV_carburetor

And #2?

[geezer#99]

Set it at 3 turns from bottom.

[SilverMiner]

Originally Posted by SilveradoDude

Hey guys I have my Quadrajet disassembled cleaned, new parts bought and ready to re-assemble. I have a few questions though:

1. Do I just lay the needle there with no hanger I have heard it is better without the hanger?

2. The Power Valve set screw has been altered, how to properly calibrate it?

On the chance that you have already assembled the carb without the clip attached, Qjet guru Cliff Ruggles has blessed leaving it off.

Originally Posted by copied from cliffshighperformance.com

Cliff Ruggles
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Re: Leaving clip off needle and float
« Reply #1 on: November 18, 2015, 03:25:55 AM »

The purpose of the clip is to raise the needle out of the seat when the carb bowl dries up. This insures that residue from the drying up process doesn't "glue" the needle into the seat and prevent the bowl from filling on the next start-up.

With this new fuel, it evaporates quickly and leaves nothing behind in terms of "sticky" residue, and I haven't seen any issues to date by leaving the clip off the needle.....Cliff

[geezer#99]

The guru has spoken!
However when it floods and washes the oil off your cylinder walls and you scuff a piston or two, I bet he won’t step up and offer to rebuild your motor!

[Jaysonb]

I'm not sure if by power valve set screw, you are talking about the adjustable part throttle adjustment. If that's what you are talking about, take the aluminum access plug out, and thread the hole for a removable plug, and you can really dial in your quadrajet. You can see in this pic, where the access plug was, I theaded the hole and cut a little chunk off of a bolt, and cut a little screw driver slot in the end. It's an easy adjustment to make on the fly, and can have a very positive effect on drive ability, and economy once it's set correctly.

[Axle]

Guru or not, use the clip. If you don't drive everyday, and the carb sits for extended periods of time (fuel evaporates) the needle can stick and make starting a bit of a chore.

Alex.