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The LA engine was available until 1991, when it was superseded by the Magnum version. It used hydraulic lifters and a two-barrel carburetor for most of its production, though four-barrel Carter Thermo-Quad and Rochester Quadrajet carburetors were used in police applications starting in 1978 and 1985, respectively. The 318 two-barrel ELD ...
Quadrajet carburetors were also built under contract by Carter. This was due to the fact that Rochester could not keep up with the demand for carburetors at various points in their production. [citation needed] Carter-built Quadrajets will have the name "Carter" cast into them, but are functionally identical to the Rochester-built equivalent.
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.
The J-2 engine also had a slightly thinner head gasket, raising compression to 10.0:1. It was advertised with gross power and torque ratings of 312 hp (233 kW) at 4600 rpm and 415 lb⋅ft (563 N⋅m) at 2800 rpm. Oldsmobile charged $83 for the J-2 option with the three-speed manual (or in the 98), [7] $314 with the automatic. [8]
At high engine loads, the rods are lifted away from the jets (either mechanically or using manifold vacuum), increasing the volume of fuel flow through the jet. These systems have been used by the Rochester Quadrajet and in the 1950s Carter carburetors.
They were identical to Rochester's units, except the Carter name was stamped into the body. In Carter's final years in the early 1980s, they also produced Weber carburetors under license, such as the three-barrel Type 40IDA sold as replacements (or fuel injection retrofits) for 1960s and 1970s Porsche 911 S.
This was accomplished by merely disconnecting a single wire from the transmission's "3rd-gear switch", or running it through a switch inside the car for manual override. The 368 was dropped from most Cadillac passenger cars after the 1981 model year, although the V8-6-4 remained the standard engine for Fleetwood Limousines and the carbureted ...
In 1937 Rochester Products was founded, planned as a second plant for Delco Appliance, but achieving Division status by 1939. [6] In 1953 an advertisement in Life stated: "Rochester builds original equipment carburetors for Chevrolet starting with 1950, Oldsmobile from 1949 and Cadillac
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