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The "LS" nomenclature originally came from the Regular Production Option (RPO) code LS1, assigned to the first engine in the Gen III engine series. The LS nickname has since been used to refer generally to all Gen III and IV engines, [14] but that practice can be misleading, since not all engine RPO codes in those generations begin with LS. [15]
The LT1 uses a new engine block, cylinder head, timing cover, water pump, intake manifold and accessory brackets. The harmonic damper also does not interchange; it is a unique damper/pulley assembly. Engine mounts and bell housing bolt pattern remain the same, permitting a newer engine to be readily swapped into an older vehicle.
An LS swap is a type of engine swap using any form factor of General Motors's LS V8 engine series. [1] [2] Motor Trend noted in 2020 that "the Chevy LS V-8 engine has become the de facto engine swap suggestion for anyone seeking to add power to their existing platform" due to the engine's relatively compact size and light weight. [3]
The engine has a claimed output of 580 hp (433 kW) and 445 lb⋅ft (603 N⋅m). Like the "Voodoo" engine, it also features a 12:1 compression ratio and 5.2 L; 315.1 cu in (5,163 cc) of displacement. [48] This engine is sold as a Ford Performance Parts crate engine without a wiring harness, a flywheel, or headers.
The HiPo engine was used in modified form by Carroll Shelby for the 1965–1967 Shelby GT350, receiving special exhaust headers, an aluminum intake manifold, and a larger 4-barrel Holley 715 CFM carburetor, which raised rated power to 306 bhp (310 PS; 228 kW) at 6,000 rpm and 329 lb⋅ft (446 N⋅m) at 4,200 rpm of torque.
The engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. The fuel-injected engine became an option on any Pontiac model, carrying a staggering price tag of $500 (almost 15% of the car's base price). It was rated at 310 hp (231 kW) at 4800 rpm and 400 lb⋅ft (542 N⋅m) at 3,000 rpm on 10.5:1 compression.
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