Another quadrajet or edelbrock?

[Mw1980c10]

My quadrajet on my 350 is acting up after last rebuild. Its a 4mv. So im pretty sick of trying to rebuild and am going to order a rebuilt one from summit or buy an eldelbrock from abc. The parts guy proffesses to be a carb guy however says that the quadrajet doesnt put out 750cfm after a little research im pretty sure hes wrong. So my question would be should i get the summit rebuilt 4me (i heard hooking up the electric choke is fairly simple) or a 600 cfm eldelbrock the parts place is pushing? Would a 600 cfm carb do well on the 350?

 

[Swims350]

a 600 will be plenty for it. fuel mileage will go down most likely going to any aftermarket carb plus you'll need an adapter if it has the stock quadrajet intake, the egr gets in the way of the edelbrock carbs, and you'll need the kickdown and throttle studs for the edelbrock to make it work and most times an air cleaner spacer or another air cleaner depending on what you have now

 

[bucket]

What kind of problem are you having with the quadrajet? Several people here are a wiz with them, such as @Quadrajet Power

 

[1987 GMC Jimmy]

I wouldn’t go Edelbrock if I was somehow compelled to buy aftermarket. I’d go with Holley. But even then, I’d stick with the Quadrajet first and foremost. The Quadrajet does take in 750 CFM or more depending on the type. I wouldn’t buy one of those sweatshop carbs, and yours may have an unrepairable problem like body warp from improper and/or overtorque. You’ve already got a rec for Quadrajet Power, and Mountain Man Carb in Hackett, AR is really good, and they're the shop that did mine. I’d pop the one you have in the mail, have it inspected by one of those two shops, and see if they can rebuild it or rebuild a known good core in lieu of yours.

 

[Honky Kong jr]

@RustyPile knows a thing or two about the Slobberjet. X2 on Jessie’s post

 

[Mw1980c10]

Sorry for the late response and thanks for all the info. I went with the edelbrock with the intention of putting the qjet back on after getting a pro to mic it flow test it and etc. After the qjet is good ill use the edelbrock on a 350 ive had in the shop for way too long. But ill definitely check out the shops mentioned and appreciate all the info.

 

[Mw1980c10]

Just out of curiousity why the holly over quadrajet?

 

[1987 GMC Jimmy]

I would not go with a Holley over a Quadrajet. @Honky Kong jr definitely would, though. I have experience with and know how to tune a Holley, and I think it's a solid carb so it would be my alternative. The Quadrajet can do anything on a spectrum of economy to performance when built right and not irreparably damaged. It can't do anything when it's built wrong or irreparably damaged. It's a more sophisticated piece of equipment compared to Carter AFB/Edelbrock and Holley, which contributes to its bad reputation. Their age, relative fragility, small common problems (i.e. leaky well plugs), E10 gasoline being hard on them, affiliation with pre-TBI spaghetti emissions, people messing them up who don't know how to rebuild carbs, and Rochester Div.'s feedback model Quadrajet have given it a bad, and I would argue very undeserved, reputation.

 

[Rusty Nail]

Whatever you do, don't buy an Edelbrick Carter. Fix the Quad or buy a Holley.

 

[Tobe's84Jimmy]

i got that new edelbrock avs2 and its not to bad! BUT before i read all the so-far responses i was gonna say stock is easier than modded, modded is like tattoos/lays tater chips, it’s a long expensive road and yes Carcaine is addictive, ruined my life.

 

[RustyPile]

Sorry for the late response and thanks for all the info. I went with the edelbrock with the intention of putting the qjet back on after getting a pro to mic it flow test it and etc. After the qjet is good ill use the edelbrock on a 350 ive had in the shop for way too long. But ill definitely check out the shops mentioned and appreciate all the info.

Sorry I'm late.. I received an invitation your party, but I've been pre-occupied with other matters.. I don't want to come across as bragging but I've been working on Q-Jets since they were first introduced decades ago.. I'm retired from auto repair, so I don't do it for money anymore, just for the fun of it.. I see you're a fellow Texan and not far from me, this might be something you want to consider.. Like Jessie said, some of these carburetors have been hacked beyond repair, but when they work right, they're hard to beat..

I don't need a job, but I'm willing to help you out here.. Send the carburetor to me and let me have a look at it.. I'll let you know what I find and discuss it with you.. If it can be repaired, even if it requires a total rebuild, you pay for any needed parts and the shipping.. I'll supply the time and labor.. If you're agreeable to this, contact me through the PM feature and we'll work out the details..

 

[stuman]

I've had good luck over the years with QJ. Used to tear into them and make mods all the time...jet size, metering rod size, metering rod depth, brass float etc... You can jet the primaries very lean on these and setup the secondary control flap spring and accelerator pump just right for no "bog" and get the best of both worlds...pretty good "normal" driving mpg and still be able to waylay it when you want. I've also had pretty good luck with Edelbrock, and its predecessor Carter AFB. I'm not one to stress the tachometer though.

 

[ali_c20]

When my old q-jet died I replaced it with an edelbrock ( I needed a quick replacement and some companies have them in stock in austria ) which was mistake. I correctet this and bought a smi rebuild quadrajet with electric choke.
I'm pretty happy with it, threw it on, adjusted idle with vacuum gauge and the choke. Had no problems in the last 2.5 years.

https://www.smicarburetor.com/