How do I identify a Quadrajet carburetor?

How do I know what quadrajet carburetor I have?

All Rochester carburetors, including the Quadrajet, are identified by a 7-digit or 8-digit part number; the earliest units, made before mid-1968, had a round metal tag attached to the fuel bowl. The 7-digit part number ran around the outside edge of the tag.

How do I know what Chevy carburetor I have?

The large flat area on the main body just above the secondary throttle shaft has a series of numbers stamped into the casting. In most cases these numbers can be used to identify the year and application the carburetor was originally used on. After 1975 Carb will have an 8 digit code starting with 1 – i.e; 1704..

Are quadrajet carburetors any good?

The truth is, a properly tuned Quadrajet can be just as efficient and reliable as a bolt-on substitute performance carburetor. And because they were used on so many original-equipment applications, they are readily available from many used parts suppliers at a very reasonable cost.

Where is the carburetor number located?

The list number is stamped on your carburetor, either on the corner of the airhorn or choke tower or, if it doesn’t have an airhorn, on the mainbody. Remove the carburetor from your vehicle before looking for the list number to easily find the information you need.

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How do you decode a quadrajet?

How to Decode Rochester Quadrajet Carburetor Numbers

  1. Check the first three digits. …
  2. The next digit identifies the exact production year. …
  3. The next digit indicates the carburetor model. …
  4. The next-to-last number in the set is the division: “0,” “1” and “2” are for Chevrolet, “4” is for Buick, “5” is for Oldsmobile, and “6” or “7” is for Pontiac.

Is a quadrajet a spread bore?

The Quadrajet is a “spread bore” carburetor; the primary venturis are much smaller than the secondary venturis.

Are all Quadrajets the same?

No they are not the same at all. Different size jets, oumps and there was even different cfm. Normal is 750 cfm and I think it was 800 or 830 was the bigger one.

How do you date a Quadrajet carburetor?

Most Rochester-built Quadrajet carburetors were given a four-number date stamp. This code can be deciphered as such: the first three numbers are the day of the year (082x = 82nd day of the year) the carburetor was built. The last number is the year (0828 = 82nd day of 1968).

How do I identify my Rochester 2 barrel?


What is a 2G carburetor?

The Rochester two-barrel carburetor (called the 2G, and later 2GC and 2GV), was introduced in 1955, and use of the 2G carburetor in automotive applications ended in 1979. In actuality, there were several different styles of Rochester two-barrel carburetors manufactured since the 1955 release.

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How do I identify my Demon carburetor?

The number “6” is stamped on the top of the body and the air horns are the size of a quarter. That’s it! That’s how you identify the 575 cfm mech secondary Demon Carb. From Demon tech service’s mouth.

How do I know if my carburetor is quick fuel?

To identify the carb it has a number either on the front part of the tower or the rear part of the tower right below the hole in the middle to where the gas flows and goes into your shooters.

How do I identify my Weber carburetor?

Weber model numbers are always stamped on the carburetor body. They always begin with a 2-digit number (or a pair of 2-digit numbers separated by a slash) followed by three or four letters. There may or may not be more numbers and/or letters after that.