The 1947 - Present Chevrolet & GMC Truck Message Board Network - POLL: Holley? Q-jet? or Edelbrock? Let's finish this once and for all!!!!

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- - POLL: Holley? Q-jet? or Edelbrock? Let's finish this once and for all!!!! (https://67-72chevytrucks.com/vboard/showthread.php?t=436034)

Re: POLL: Holley? Q-jet? or Edelbrock? Let's finish this once and for all!!!!

Quote:

Originally Posted by mmiddle (Post 6171864)

That's a loaded question. Q-Jets have a lot of parts. For a basic rebuild pay very close attention to things like how the primary metering rods attach to the power valve. One of the biggest problems is leakage in the secondary metering wells. Use JB Weld to on the bottom side of the wells to seal them. Don't mess with the adjustment screw for the secondary air flaps.

HP Books has a really good book on Q-Jets that detail every adjustment and how to make them scream. Even for the basic rebuild it is very helpful.

I would recommend also going to You Tube and typing in QuadraJet Rebuild or something close to that.

mmiddle summed it up very nicely. But on Q-Jets you have to pay attention to details. Once you get one or two under your belt the rebuilds go smoothly.

Good luck.

Re: POLL: Holley? Q-jet? or Edelbrock? Let's finish this once and for all!!!!

if you are gonna rebuild any carb. I suggest getting a bushing kit for the throtle body. I have never seen a throtle body Holley or Rochester that is not loose!

Re: POLL: Holley? Q-jet? or Edelbrock? Let's finish this once and for all!!!!

Sorry for "jackin' the thread!!

Re: POLL: Holley? Q-jet? or Edelbrock? Let's finish this once and for all!!!!

You run into that with the cast bases. The billet bases on most 4150 series carbs stay dead tight for years. Much denser material. Running your return spring correctly to the FRONT will help save your throttle bores but we weren't taught that huh?
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