Where are the numbers on a Quadrajet carburetor?

There are a couple of locations containing the codes needed to identify your Quadrajet; both are located on the driver side of the carb body. Early Q-jets used a circular tag stamped with the codes found in a cavity in the side of the float bowl, while later carburetors used a stamping on the body of the carb.

How do you read a Quadrajet number?

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).

What Rochester carburetor do I have?

ID numbers for a Rochester Quadrajet carburetor are found next to the throttle level. There should be a metal disc affixed to the carburetor for those in the 1965 to 1968 range, and the number was stamped into the unit without a metal disc on the later-year models. This is the number you need for decoding.

How many CFM is a Rochester 4gc?

Produced in 486, 553, and 692 CFM ratings, the 4G uses a squarebore layout with a conventional fixed jet, power valve and accelerator pump metering scheme.

How do I know if my Quadrajet is 800 cfm?

When looking through the primaries, if you see a pronounced bulge protruding from the side of the wall surface, you have an 800 cfm carburetor. The primary wall of the 750 cfm unit does not have this bulge, and is consistent throughout. In the early ’80s, GM incorporated electronic connections to the Quadrajet.

Where are the numbers on a Rochester carburetor?

What model Quadrajet do I have?

How do you identify a Rochester Quadrajet carburetor?

All Rochester Quadrajet carburetors are identified by a seven- or eight-digit GM part number. On units made before mid-1968, the part number was stamped around the outside edge of a round metal tag attached to the fuel bowl.

How many CFM is a Rochester Quadrajet?

How many CFM is a quadrajet? Quadrajets can range anywhere in between 600 and 800 CFM. Most are rated 750 CFM or higher. Also, is the Rochester quadrajet a good carb?

What does the number 5 mean on a Quadrajet?

If the Quadrajet you’re looking at has a seven-digit part number ranging from 702 through 704, these were built before 1976. On these units, the number immediately following these three digits, will designate the actual year of production. After that, you will find either a 2, or a 5. The number 5 designates an emission carburetor from California.