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Carb Advice

fatecaptured

fatecaptured

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So I tried to start the Charger. No telling how long it sat. I went through all the systems to make sure it would start: New engine harness. Plugs. Plug wires. Coil. Replaced parts in distributor. New Battery.

After priming the carb and turning it over a few times, gas was all over the intake. So I pulled the carb and there was no gasket.. So I mite as well do something with the carb.

My questions are:

Should I rebuild the AVS? Unknown what cfm it is. C6 4640SA
Any one know?

Or should I rebuild a AFB that I have on the shelf. It came off the coronet when I bought it. Was running pretty well when I parked it. CFM also unknown.
687 96368A


I like the AVS, but it looks like its seen better days. Missing clips and has a chip out of the top. No major damage that I can tell. How hard is it to get parts for this carb?

This is the AVS:
1343604095455.jpg

1343604081134.jpg



This is the AFB:
1343602527125-1.jpg

1343602766479.jpg


Also the throttle and kickdown doesn't look right.Anyone help with this also?
1343602757114.jpg

1343602757114-1.jpg
 
The AFB & AVS are both good carbs,I'd rebuilt a gazillion carbs back in the day. You can get a rebuild kit for them. The AFB looks pretty good. Unless you want to spring for $$$ for a new carb, why not ? Hard for me to see, is your kickdown bracket bent ?
 
I like the AVS better. I do not know the CFM rating of it now since I'm at work and. An. Of look it up so quick. But the AFB numbers I know and that is a 600cfm w/a MoPar throttle arm.

If the AVS has the same size bottom throttle bores, it is a 750. If it has 2 different sizes, then it is a 630cfm.
 
If I remember correctly, it has the same size barrels. Was hoping for the 800 cfm carb mentioned in the paragraph from the carb Dr. website. I remember reading about the AVS in mopar muscle or Action. If memory serves, the AVS would be the better piece. But what I was wondering is which year was this Carb and what cfm? Also which kit should I get(2on website)? One kit is for 68only and other is for 69-71. Also can I get a new top plate to replace the chiped one on there now? Also what about the diaphragm? Is it replaceable?

Kinda want to rebuild this carb. Especially if the AFB is only 630 cfm. I want the higher cfm and the better carb choice. I know in 72 they only put Holleys on the 440's. But its not original motor anyways, why not...
 
The AVS came in 630 and 750 cfm sizes only, as per the old Carter tech line that I have called up.

The AFB is sized at 600 and 750.

Edelbrocks and Federal Mougal versions of the AFB that are rated at 625 are only 625 for the I.D. purpose due to the emissions status of the carb.

Edelbrock rates there Hy-bred AVS at 650. How this is possible I do not know. But I would love to have them flow tested.
 
rumblefish360 said:
The AVS came in 630 and 750 cfm sizes only, as per the old Carter tech line that I have called up.

The AFB is sized at 600 and 750.

Edelbrocks and Federal Mougal versions of the AFB that are rated at 625 are only 625 for the I.D. purpose due to the emissions status of the carb.

Edelbrock rates there Hy-bred AVS at 650. How this is possible I do not know. But I would love to have them flow tested.
Click to expand...

That's. I'm kinda clueless to stock stuff and period correct stuff. I Google and read up on what I can. Sometimes there's a lot of conflicting information. Its tuff. So sometimes I feel like a retard for asking questions on stuff thats probably common knowledge to most moparist's. But I'm slowly getting there. This site helps a lot.

So as to my previous questions. Which year is this carb and which kit should I buy? Thanks everyone for your help.
 
All .things being equal, the AVS is a better choice. You can adjust the air flap.
 
From what I have heard the factory AVS carbs were not rated in CFM numbers that are comparable to Holleys, or what we are conditioned to accepting as a standard. The numbers from what I know are 700-750 CFM for the 1-11/16" bores or 585 CFM for the smaller primary bores. Then you get the ones with the smaller secondary bores like the 273 carb and those look to be about 400 CFM (like a 9400 AFB). But don't take any of this to the bank. The pressure drop and if they are measured "wet" or "dry" plays a big roll. See here http://www.thecarburetorshop.com/Carbshop_carbsizesandCFM.htm

I do know that I ran an Eddy 750 AFB, which is probably a standardized rating by now, on my 440 and it ran within a couple of tenths and MPH as compared to the larger OEM AVS carb - with the OEM carb being a little slower. I did the swap at the track on the same day so I'm pretty sure I'm only seeing the effect of the carb change.
 
The AFB 9636SA is a Carter performance model at 625CFM

The AVS 4640SA is from a 69 440 Auto at 750CFM
 
Do I need an adapter or something for the linkage? It. Was looking all retarded to me. The bracket looked cockeyed and it was a bitch to remove. Ended. Up sliding it out of the linkage(kick down)
When I removed the Carb from the intake.

I'm dealing with an unfamiliar setup (used locar on the coronet). Its a 72 charger with a 71 hp 440. Unknown if its the original kick down. Are they capable of hooking up to this Carb ( 71-72 charger's )?
 
rumblefish360 said:
I like the AVS better. I do not know the CFM rating of it now since I'm at work and. An. Of look it up so quick. But the AFB numbers I know and that is a 600cfm w/a MoPar throttle arm.

If the AVS has the same size bottom throttle bores, it is a 750. If it has 2 different sizes, then it is a 630cfm.
Click to expand...

Hay Rob, if memory serves me right, didn't Carter have a different method for measuring the CFM from everybody else, too? Seems I've read that before.
 
Meep-Meep said:
That's what I thought. See my post above.
Click to expand...

Well duhhh.....I missed that. lol


Naw it ain't Palin. Google "Lisa Ann" images. You might not wanna do that with kids around or at work. Just sayin. She's a workin girl, if you get my drift. Put it this way.....she was the star in the movie "Who's Nailin Palin?" lol
 
fatecaptured said:
So I tried to start the Charger. No telling how long it sat. I went through all the systems to make sure it would start: New engine harness. Plugs. Plug wires. Coil. Replaced parts in distributor. New Battery.

After priming the carb and turning it over a few times, gas was all over the intake. So I pulled the carb and there was no gasket.. So I mite as well do something with the carb.

My questions are:

Should I rebuild the AVS? Unknown what cfm it is. C6 4640SA
Any one know?

Or should I rebuild a AFB that I have on the shelf. It came off the coronet when I bought it. Was running pretty well when I parked it. CFM also unknown.
687 96368A


I like the AVS, but it looks like its seen better days. Missing clips and has a chip out of the top. No major damage that I can tell. How hard is it to get parts for this carb?
Click to expand...

The bracket looks like it could be bent over toward the motor, and the kickdown is missing a spring. I have included a pic...

carb.jpg
 
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