How do I know what model my Quadrajet is?
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.
Is a Quadrajet worth rebuilding?
A full and in-depth article of the rebuild process that Jet Performance takes with a Q-Jet Carburetor, by Dragzine.
Who makes Rochester carbs?
Historical Information. The Rochester Components plant has been building automotive components for over 75 years. It is the original home of the Rochester Products Division of General Motors and is well known for manufacturing the Rochester Carburetor.
Are all Quadrajet the same cfm?
Quadrajets can range anywhere in between 600 and 800 CFM. Most are rated 750 CFM or higher.
Are Rochester 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 part number on a Quadrajet?
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 I know what size 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.
Are Quadrajet carbs any good?
Is Quadrajet a good carb?
How to Quadrajet carburetor rebuild video?
This first part of the Quadrajet Carburetor rebuild covers removal and disassembly of the Rochester Quadrajet. We removed the carb by removing the four bolts, throttle cable linkage and a vacuum hose. Raw fuel pooling on the floor of the intake manifold substantiates concerns that the carb has issues.
Where is ported vacuum on Quadrajet?
Where is ported vacuum on quadrajet? If you have an electric chock, ther is usually a vacuum port on the choke tha runs through hard lines to the exhaust crossover in an OEM manifold, but otherwise, you can run a line directly the the port on the top rear pass side port on the carb air horn.
How to adjust a Zama carburetor?
How to adjust typical diaphragm carburetors On most Zama carburetors to help find the correct adjustment there is a small L beside the Idle mixture screw and H beside the High speed mixture adjustment. Normal adjustment for 2 needle carburetors begins with the L needle. This adjustment controls the fuel flow to the low speed or idle circuit.
How to adjust an outboard carburetor?
Adjusting the 2-cycle outboard motor carburetor will keep the engine running properly while providing better fuel mileage. The 2-cycle outboard carburetor has two adjustment knobs (a large stop screw knob on the left side of the motor and a carburetor idle knob on the side of the carburetor) that allow you to set the carburetor for the best performance in just a few minutes.