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The Quadrajet is a four barrel carburetor, made by the Rochester Products Division of General Motors.Its first application was the new-for-1965 Chevy 396ci engine.Its last application was on the 1990 Oldsmobile 307 V8 engine, which was last used in the Cadillac Brougham and full size station wagons made by Chevrolet, Pontiac, Oldsmobile, and Buick.
An optional high-performance Sprint version featured high-compression pistons, hotter cam, dual valve springs, split/dual exhaust manifold, stronger coil, and the then new Rochester Quadrajet carburetor. rated at 207 hp (154 kW). [5] Power was increased to 215 hp (160 kW; 218 PS) in 1967.
Some early 307s were painted GM Corporate blue, but most were painted satin black. It was used in most Oldsmobile models, as well as those from Buick, Cadillac, Chevrolet, and Pontiac. Every 307 used a four-barrel carburetor, which was a variant of the Rochester Quadrajet, usually the CCC (Computer Command Control) Quadrajet.
In 1957 Chevrolet introduced their first fuel-injected engine, [12] the Rochester Ramjet high-performance option on Corvette and passenger cars at $484. [13] In 1956 Oldsmobile were also experimenting with Rochester fuel injection, at the GM desert proving grounds near Phoenix, but offered the Rochester triple-carburetor J2 option for 1957. [14]
The 1973–1974 L82 was a "performance" version of the 350 that still used the casting number 624 76cc chamber "2.02" heads but with a Rochester Quadra-jet 4bbl carburetor and dual-plane aluminum intake manifold, the earlier L46 350 hp (261 kW) 350 hydraulic-lifter cam, and 9.0:1 compression forged-aluminum pistons producing 250 hp (186 kW ...
A larger 4 in (101.6 mm) ram air flex duct to the air cleaner from the left-hand fender, specific carburettor calibration for the Rochester Quadrajet, a "T/A 4.9" callout on the shaker, 60 psi oil pump, and cam similar in grind to the 220 hp (164 kW) 400 from the 1978–1979 model year were also included.
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The Hurst/Olds was powered by a 390 hp (395 PS; 291 kW) @ 5000 rpm and a maximum torque of 500 lb⋅ft (678 N⋅m) @ 3200 rpm, 308° duration cam W-45 (without A/C) or 285/287° duration cam W-46 (with A/C), with a displacement of 455 cu in (7.5 L) Rocket V8, equipped with a single 4-barrel Rochester Quadrajet 4GC carburetor.