I have a Carter AFB "COmpetitions Series" or so the tag mounted on the front of the carb says! What numbers or visual things do I have to look for to ID this carb,,cfm etc?? Thanks
There are two groups of AFB's with the tag "Carter Competition Series". The first are the true competition series carburetors; numbers 4758s, 4759s, 4760s, 4761s, and 4762s. The second are the Federal Mogul clones with numbers in the 9000 series. These are the redesigned Carter 9000 series carburetors. Both should have the number (4 digits followed by the letter "S" as in Sam) stamped on the vertical edge of the throttle body. If the carburetor is installed on the vehicle, you should be able to view the stamped number by leaning over the radiator and observing the vertical flange on your left. Jon.
Well finally got around to getting the #'s off my carb!! The number I got off it was 9635 SA 2015,,,,just wondering if anyone could tell me what this carb is,,and if it will support a 401 with mild head work, cam, headers and exhaust? Thanks
It depends on the size of the hammer! p All joking aside, this carb will need different idle tubes, different secondaryy jets, different metering rods, different vacuum piston springs, and different secondary airvalve to run decent on the Buick. Even with the modifications, it will NOT run nearly so well as with the stock Q-Jet. Now TWO of them.... with the aforementioned mods....thats another story! Jon.
Thanks for the response!!! So what would your recomendations be for a single carb application? At one time I was seriously considering a holley commander 950 fuel injection system,,but was told that since my engine is freshly rebuilt that it should be broken in with a carb!! Any advice is more than welcome!!
On a 401 with mild modifications? Will assume this is a street vehicle with maybe an occasional trip to the strip. For less than extremely radical street engines of 300 plus CID we will virtually alway recommend some form of spread-bore carb for a single carb application, or dual Carter (original, not clones) AFB's for a dual carb application. With no other information than what you have posted, your combination screams Rochester Q-Jet or Carter TQ. Others may have differing opinions. Jon.
Well thanks for the info so far!! What other info would you need to zero in on what I would need!! I bored the 401 out .0030 over, it has a mild cam from Carmen, slight head porting, a set of TA headers, running into a Magnaflow TruX exhaust,,I have adapted a 200R4 transmission, 3.55 gears, not sure what else I would need,,hope this helps,,Thanks again!!
Forgot to mention,,the car will be just like you said,,,mainly cruiser,,with the odd trip to the track for fun once in a while!!
Don't know what is required to make the 200R4 work; personal opinion is that automatic transmissions are too light for a boat anchor, and too heavy for a paper weight p Obviously, others differ with this opinion! As to the carburetor? Manifold that accepts a spread-bore carburetor with no adapter; and either a Rochester Q-Jet (a 1970 or 1971 would be a good starting point) or a Carter TQ 9800s. Jon.
