What is a good carb for a mostly stock 430?

I'm running an Edelbrock 1411 750cfm on top of a offy intake, otherwise stock. The car will stumble/stall off the line, I have tuned the carb and even tried the metering rod/jetting kit to no avail. I'm thinking of going with an Edelbrock Thunder 650 AVS. Any suggestions? This is a repost, I had it in the holley section by accident.

 

Sean, what happened to your original post on this subject???? Larry and I were trying to help you out.

Devon

 

Cliff Ruggles I believe posted that the stumble is characteristic of the E brock carb. Get a Q jet for your ride. It is a great carb.

 

I had it in the holley section by accident, didn't want to get in trouble so I moved it. I did gather that my offy intake is a single plane=bad for a stock motor. I believe one you guys suggested a q-jet as well.

 

Are you stuck with that intake, or can you go with another? If you're planning to run the Offy, maybe we can help. The Quadrajet is really hard to beat for drivability & performance for your application.

Devon

 

I'm hearing a lot of folks suggest the q-jet, I had a bad experience with one on my Buick 350 that I used to have. It was a reman unit that I got from autozone, nothing but stalling, the car went good when it ran though. I guess I'm kind of biased with the eddy carbs, the car I had before this one ran well with one, almost like efi, but it was a 600cfm and I've heard lots of bad things about the quality control on the #1411 eddy so. Do you know of any good sources to get a good q-jet?

 

If I can make the offy work I'd like to, it was on the car when I got it. I'm planning on doing a mild build later on, but for now looking for drivability. Are the jet q-jet's any good? I can drive to the summit store so, it is tempting.

 

Two guys can help you out.

Contact Greg Gessler at www.gesslerheadporting.com

And Cliff Ruggles at ww.cliffshighperformance.com .

You will not be disappointed!

Devon

 

I played around some more with the eddy 750 today. I believe I am finally making some headway with it. Step one: I ended up going back to the stock orange step up spring which made the transition from idle smoother. Step two: I also put the 73/42 metering rod in it which definately made a difference when going part throttle to wot. I am going to drive it more tomorrow but I need put gas in it(ran out). I'll let you guys know how it pans out.

 

For what you say you want to do...
Quadrajet,Quadrajet,Quadrajet...did I say Quadrajet?
And for sure a stock intake.
Listen to Larry !

Eric /Oregon :3gears

 

68' Riviera. Running stock intake manifold and Q-jet.
Sometimes the engine runs great, and other times it wants to stall when letting off the gas.
To restart, I need to hold the accelerator to the floor to get more air. Feels like I'm dealing with an intermittent flooding situation.
I had the carb rebuilt recently. The jets are 70s. Are these the right jets?

 

I use a Qjet on my 430 but I know folks that swear by every solution. Before you drop big $$$ I like what you are doing, try to make this work for you. I agree 100% with posters that say the auto part rebuilds are junk….they are junk.

 

I agree 100%, bought a Jet Qjet, bad right out of the box. Didn't know about junk Qjets from stores.

Ended up buying a Holley 4150, works great.

If I had known there are expert Qjet builders on the forum, I would have gone that route.
Too much money invested now.

Did I say, i'am new to the forum, great people here and very knowledgeable gear heads.
Listen to Larry, he knows what he's talking about.

Thanks to all on the forum for your help. VET (Navy)

 

Who rebuilt it?

 

Larry,

Not sure what’s going on with my Q-Jet…
68 Riviera - rpm oscillates at idle. I have a short video, but can’t seem to upload here.

 

This is a time warp.. the thread is 14 years old and the op hasn't been back in over 10.. with luck his stumble is figured out!

 

Fluctuating at idle is a function of vacuum and air through the carb. It can be the carb itself, a vacuum leak elsewhere, distributor advance, or even the cam profile. Odds are good that you’re fluctuating from the idle circuit to the power circuit but it’ll take some sleuthing to figure out what is cause and what is effect. Post the video along with vacuum readings (or video of a vacuum guage while it’s cycling.)
Patrick