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Rochester produced 2 different variations of the 2 barrel variant of their feedback carburetors. The E2M DualJet was basically an E4M QuadraJet with the secondary barrels removed, while the E2S VariJet was a progressive carburetor with a primary and secondary barrel for fuel economy.
The Quadrajet is a four barrel carburetor with a "spread bore" throttle plate, made by the Rochester Products Division of General Motors.Its first application was the new-for-1965 Chevy 396ci engine.
Two-barrel downdraft Holley 2280 carburetor Cross-sectional schematic. A carburetor (also spelled carburettor or carburetter) [1] [2] [3] is a device used by a gasoline internal combustion engine to control and mix air and fuel entering the engine. [4]
[citation needed] The last major carburetor design by Rochester was the Varajet II, [citation needed] essentially a Quadrajet halved lengthwise, [citation needed] and was one of the few successful progressive 2-barrel carburetors. [according to whom?] It was installed on 4- and 6-cylinder engines from 1979 to 1986. [citation needed]
Extensive testing of intake systems was done. Eventually the team settled on 1 + 3 ⁄ 4 in (44 mm) diameter ram tubes each 25 in (640 mm) long and a central plenum. This configuration was tested against both a 1963 and 1964 turbo engine as well as engines with six individual carburetors and two three-barrel Webers. The injected engine's output ...
The first iteration of the 305, the LG3 was introduced in 1976. This variant used a Rochester 2GC carburetor from 1976 to 1978. In 1979, the more fuel-efficient Rochester Dual-Jet two-barrel carburetor replaced the older 2GC. This change also resulted in a drop in power to 130 hp (97 kW) and 125 hp (93 kW) for California emissions cars.
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The final Chrysler use of four-barrel Carter carburetors was the Thermo-Quad, which used a lightweight thermoplastic float bowl, on the most powerful Chrysler engines. [1] Carter produced Rochester Quadrajet carburetors for their rival maker whenever demand outpaced Rochester's ability to make them. They were identical to Rochester's units ...
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