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[citation needed] They were also equipped with a self-contained choke mechanism that no longer relied on an intake manifold mounted choke, and a number "1" was added to the beginning of their identification numbers. [citation needed] The digits in a Quadrajet model type denote its features. For example, the "E" at the end of a later Q-jet model ...
The Chevrolet 90° V6 family of V6 engines began in 1978 with the Chevrolet 200 cu in (3.3 L) as the base engine for the all new 1978 Chevrolet Malibu.The original engine family was phased out in early 2014, with its final use as the 4.3 L (262 cu in) V6 engine used in Chevrolet and GMC trucks and vans.
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.
The LA engine was available until 1991, when it was superseded by the Magnum version.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 ...
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.
As Pontiac had discontinued the 455 in the previous model year, a modified 400 Pontiac V8 dubbed the "T/A 6.6" RPO W72 with a single four-barrel 800CFM Rochester Quadrajet carburettor rated at 200 bhp (203 PS; 149 kW) at 3,600 rpm and a maximum torque of 325 lb⋅ft (441 N⋅m) at 2,400 rpm, as opposed to the regular "6.6 Litre" 400 (RPO L78 ...