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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 ...
Starting in 1979, a two-barrel intake fitted with a Rochester Varajet carburetor and dual take down exhaust manifold were used in trucks and vans. The "integrated" cylinder head and intake manifold claimed to have resulted in increased low end torque and fuel economy inclusive of a smoother operation, lowering NVH (noise, vibration, and harshness).
This breakthrough led him to begin producing manifolds for Pontiac and Chrysler engines. [8] Another critical turning point in the company's history was the 1964 decision to build a four-barrel intake manifold for the small-block Chevrolet. The C-4B manifold, developed with help from Bob Joehnck, opened the door to a new line of performance ...
Several LS-7 intake manifolds were individually produced and sold to the general public by a few Chevrolet dealers as optional performance parts. The LS-7 was later offered as a crate engine from Chevrolet Performance with an officially rated power minimum of 500 hp (373 kW) gross.
When introduced in the 1997 Corvette, the LS1 was rated at 345 hp (257 kW) at 5,600 rpm and 350 lb⋅ft (475 N⋅m) at 4,400 rpm. After improvements to the intake and exhaust manifolds in 2001, the rating improved to 350 hp (261 kW) and 365 lb⋅ft (495 N⋅m) (375 lb⋅ft (508 N⋅m) for manual-transmission Corvettes.
This system relied on hot air drawn from a small heat exchanger in the intake manifold—and later models, (generally 1978-onward), relied on the vehicle's 12 volt system to power a heating element and spring as the engine's temperature increased. Quadrajet carburetors were also built under contract by Carter. This was due to the fact that ...