- Joined
- Aug 19, 2010
- Posts
- 28,491
- Reaction score
- 9,558
- Location
- Kansas City, Mo
- First Name
- Jacob
- Truck Year
- 1977/1990/1991
- Truck Model
- C10 longbed/R1500 Burb/R3500 Dually
- Engine Size
- 350/350/454
I've personally heard bad things about quadrajet
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When set up correctly a q-jet is one of the best you can have. It has a bad name cause it can be complicated to some, and they give up. But don't let anyone fool you theres a reason gm ran em so long. My uncle can tweak em like nobodys business and they purr. Got one on the 85.
Why carb do you have?
Mine's a Holley and it's performed well.
I have no doubt that the things I've heard about q-jets are due to not getting them dialed in right
I'll go with a Carter AFB or AVS, but ThermoJUNK?? Puhleeez !!! SCRAP !!!
beats a holley motorcraft carb any day and those autolite carbs suck too.
Hey hotrod....What were those suggestions on floor shifters for my 700r4?
Would it serve me well to get one that has a long arm, so I dont have to reach down to shift?
Since smog is not required and you have some cash I would just go with an Edelbrock 1406 or a Carter AFB (same ****). Its simple bolt on performance that has plenty of room for tuning, you should really just be able to bolt it on and forget about it for a while. As far as the mileage, I have been driving mine in city and on highway for a while and the MPG is pretty kick ass so far.
Quadrajet is a master piece of a carburetor, they are 750 CFM apposed to 600 like the 1406. Primarily around town you run on the 2 small primary butterfly valves so you get awesome mileage. You always have the massive secondaries as a backup when you feel like wasting gasoline.
There is aftermarket variants of the Q-jet you could use too. If you find a stock one to rebuild you have to drill holes in the base plate and knock out some plugs to get to the idle mixture screws, once you are there it takes a special tool to turn the screws. The shafts in q-jets wear the guides so alot of them get bushings installed to stop the vacuum leak, on top of that you have to put epoxy on the bottoms of the float bowls to keep them from leaking. I have rebuilt mine twice and it worked pretty damn good, the only reason I have the AFB on is I was trying to pin point an engine problem and just throwing money at it, otherwise I would still be running the Q-jet.
If I ever get a crate motor in my truck I am going back with an Edelbrock spreadbore manifold and a q-jet.