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Carter Date Code Question

MCODECUDA

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I have a Carter 4640SA AVS for a 69 440 with a date code of D1. I was under the impression that the number after the letter was for the year of manufacture. If that’s the case why would Carter be making a carburetor for a 1969 Chrysler vehicle in 1971?
 
Yes they made thousands of the 4640 and 4966 and sold them over the counter.
 
Some carbs became universal replacement for many different applications, or there could have been a significant Mod (SA, SB). And they did need replacement carbs incase of damage or heavy wear.
 
I have seen date codes of 1975 on 1971 Carter AVS 4968 4966
 
I’m leaning towards the idea that the “SA” is an “over the counter replacement”. I have six 1969 carbs stamped “SA” and the build dates (years) are all over the place plus I have a few 1968 carbs with just an “S” that were stamped with an “8” indicating that they were built in 1968.
 
I’m leaning towards the idea that the “SA” is an “over the counter replacement”. I have six 1969 carbs stamped “SA” and the build dates (years) are all over the place plus I have a few 1968 carbs with just an “S” that were stamped with an “8” indicating that they were built in 1968.
IMO....In the Carter carb markings, S = Carter's designation for a carb ASSEMBLY....SA (or SB, etc) = an Engineering revision of the basic design (an emission component or deviation of the origional jetting, etc.), it doesn't mean automatic transmission application.
BOB RENTON
 
IMO....In the Carter carb markings, S = Carter's designation for a carb ASSEMBLY....SA (or SB, etc) = an Engineering revision of the basic design (an emission component or deviation of the origional jetting, etc.), it doesn't mean automatic transmission application.
BOB RENTON
It’s very unlikely that it indicates an engineering change. I’ve owned over 30 AVS’s over the last 30 years and never seen one with a “SB”.
 
It’s very unlikely that it indicates an engineering change. I’ve owned over 30 AVS’s over the last 30 years and never seen one with a “SB”.
If you look into the Carter information the revision code, as in SA signify's a. ENGINEERING REVISION in spite of what you think or have heard b4, as I said previously.
The Carter expert is (he purchased all the Carter information the tooling, parts etc when Carter closed......call him if you don't believe me)
BOB RENTON

The Carburetor Shop LLC​

204 East 15th Street

Eldon, Missouri 65026

 
If you look at chevy AFB you will see S, SA, SB. AFB for the 327 corvette. The engineering revisions are what the A and B mean. For the corvette it was jetting changes for high altitude cars.

Take the hemi afbs, I have carbs dated 1973 and they are S carbs. No changes from the assembly line carbs. There are no SA hemi carbs that I have seen. Nor documented in the Carter manuals. But plenty of other carbs do have documented carb changes and SA or SB carbs.
 
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