Quadrajet

The Quadrajet is a four barrel carburetor with a "spread bore" throttle plate, made by the Rochester Products Division of General Motors.

A less-common version uses a linkage driven off the primary throttle shaft to mechanically move the power piston.

[citation needed] The electronic versions have a throttle position sensor that is mounted inside the carburetor body, actuated by the accelerator pump lever.

[clarify][citation needed] Significant positive features of the Quadrajet were: The Quadrajet carburetor was actually a derivative of a variable venturi carburetor called the DOVE (diaphragm operated variable entrance) which was developed in the 1961-63 timeframe at Rochester Products.

[citation needed] Simultaneously a second crash project was initiated to develop a modified DOVE which became the Quadrajet.

In addition to the casting revisions that result in a physically larger carburetor, the primary metering rod length is different from '74 and older Q-Jets.

The spring connected to a rod that actuated the choke mechanism on the passenger's side of the carburetor, and relied on intake manifold's temperature.

[citation needed] Carter-built Quadrajets will have the name "Carter" cast into them, but are functionally identical to the Rochester-built equivalent.