Rebuilt Carter AVS or new Edelbrock Thunder AVS

[Rocket]

I need a carb for my 69 Barracuda 340. I am trying to decide whether to pick up a rebuilt stock AVS (625 cfm) or whether to go for the new Edelbrock Thunder AVS (650 cfm). Both seem to be priced about the same from what I have seen advertised. Engine is mostly stock (stock intake and exhaust manifolds) but better exhaust system and minor port clean up. Anyone have any feedback or experience?

Thanks

 

[cudachaser]

I have the Eddy 650 on my mildly built up 318, I like it.

 

[dusterdon]

I don't know if the new Eddy jets and metering rods will work on a factory carb. If no there are NO jetting parts available. For the same money I'd buy the new one, unless having the correct part carb is important to you. I had AVS carbs on a couple of cars and really liked them. They're a good design. I just sold a Carter Strip Kit for AVS's and the guy was thrilled to find one.

don

 

[rumblefish360]

Don, Rocket;

The Edelbrock parts work on the OE AFB's and AVS carb except, the AVS carbs have a raised rod cover that needs to be etiher hammered flat or replaced with a flat on from a OE AFB or Edelbrock AFB.
I pick up used AVS carbs all the time (Sorry, non on hand now) and rebuild them easy and cheaply. The biggest thing to remember when taking them apart is after there bath in solvent, water wash them out down every port, nook and cranny good and then air blast them dry. Shove the pressured air down the ports, holes, nooks and crannys everywhere to be sure there clear!
The rebuild kits are cheap and easy to do.
I'll not pay a high price for those carbs rebuilt. No way no how. There just to easy to rebuild.
Beware of taking the throttle butterflys plates off. The screw are sometimes "Staked" in and very hard to remove. Witch isn't really needed. If you need to take them out, becarful.

 

[steve]

625cfm on a 340? Your gonna dehydrate that poor motor...

 

[steve]

by the way rumblefish, when you buy these kits as apposed to buying a rebuild, how do you re-bush the throttle plate bores?

 

[rumblefish360]

Steve, I have not yet had that problem. From what I understand, you'll need a metal that will not react with the aluminum. Then it's really a simple measure, drill, cut and fit. and a possible redrill to fit the shaft.
If the carb appears that bad at a swap, I'll leave it on the shelf.

Also, as per the old Carter tech line, the AVS was rated at 630 cfm. They feed a 340 for a number of years.

 

[steve]

your avs with 630 cfm was put aside and the thermoquad with the spread bore was put in place as it was approx 800cfm. The idea was taken from G.M Rochester as when the secondary choke plate was added, more fuel flow was allowed without bogging. I have never run anything under 750 cfm with a 340