How do I identify my Rochester 2 barrel?
All Rochester carburetors are identified by a seven- or eight-digit part number. The earliest units, made before mid-1968, had a triangular metal tag attached to the fuel bowl. The seven-digit part number is listed on the tag.
How many CFM is a Rochester 2 barrel?
The cfm (cubic feet per minute-a measure of how much air the carburetor can flow) on the Rochester 2G ranges from about 225 cfm in the smallest applications up to what Rochester calls a 435 cfm.
What is a 2G carburetor?
2G simply means that it is a two bore carburetor. Typically the Rochester 2 barrel carburetor is used on V-8 engines where each bore supplies air and fuel to 4 cylinders through a divided intake manifold. Two different throttle body flanges are used on the 2G carburetor, 1 1/4″ & 1 1/2″.
What Rochester carburetor do I have?
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 do I know what Rochester 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 Rochester carb I have?
How do you adjust the idle on a Rochester 2 barrel?
Adjust the idle mixture with the two idle mixture screws located in the front of the carburetor at the front bottom base of the carburetor. Attach the tachometer and using the small screwdriver turn the left idle mixture screw in slowly and watch the tachometer start to drop.
How do you adjust the idle on a 2 barrel carburetor?
For 2 and 4 barrels with the engine running and at idle, start with either screw and turn it in a ½ turn (clockwise). Then go to the other and turn it in ½ a turn. You want to keep them equal.
How do I know which Rochester carburetor I have?
Does Rochester still make carburetors?
Rochester Carburetors are still made today. They are used in many different types of vehicles, including cars, trucks, and motorcycles. Rochester Carburetors were created by the Rochester Products Division of General Motors Corporation.
How do you decode a Rochester carburetor?
Dating Your 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).