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General Motors has produced three different engines called LT1: 1970–1972 LT-1 – Chevrolet Generation I Small-Block 1992–1997 LT1 – GM Generation II Small-Block
Its maximum performance ratings (as installed in 1996 Corvettes) were 300 hp (224 kW) and 340 lb⋅ft (461 N⋅m), well above the 275 net hp and 255 net hp ratings for the original LT-1 in 1971 and 1972, and the 300 ft lb (est) net torque for 1971 and 280 ft lb net for 1972, but well below the 1970 LT1 gross rating of 360 hp.
It offers the airflow of more expensive heads, at a much lower cost. It does, however, require a specific intake manifold (the L31 has four bolts per head attaching the intake manifold, as opposed to the "traditional" six bolts per head found on older Chevrolet small-blocks). Chevrolet's L31 was replaced by GM's LS-based 5.3L LM7 and 6.0L LQ4.
Eighty years after Vic Edelbrock Sr. manufactured the first Flathead Ford intake manifold, the Edelbrock company now designs and manufactures camshaft and lifter kits, carburetors, crate engines, cylinder heads, electronic fuel injection, engine blocks, engine dress-up, fuel pumps, intake manifolds, nitrous oxide injection, power packages ...
A redesigned cylinder head and manifold for improved air flow. Variable exhaust valve timing (the LW2 engine only had variable intake valve timing) Specially-developed fuel injectors. New pistons with pentroof-style centre-domes and valve eyelets for a higher compression ratio of 12.2:1 (compared to 10.2:1 for the dual fuel engine).
Other differences between C16XE and later versions of the engine include intake manifold, C16XE has a plastic upper intake manifold, which was replaced with a cast aluminium manifold, and fuel injection system, C16XE uses Multec fuel injection with MAF sensor and later models used Multec fuel injection with MAP sensor. Also, while C16XE had its ...