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Despite the disparity in these horsepower ratings, there was no difference between the engines. In 1971, the compression ratio was decreased to 9.0:1 and horsepower decreased to 330 hp (246 kW), then the same in Corvette and Camaro. A net horsepower rating of 275 hp (205 kW) was also given. In 1972, the rating decreased again, then to a net of ...
In 1991, GM created a new-generation small-block engine called the "LT1 350", distinct from the high-output Generation I LT1 of the 1970s. It displaced 5.7 L (350 cu in), and was a 2-valve pushrod design. The LT1 used a reverse-flow cooling system which cooled the cylinder heads first, maintaining lower combustion chamber temperatures and ...
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;
This year SAE net measurement for horsepower was now utilized (away from the previous SAE gross standard), and was largely responsible for the much lower engine output figures such as the 200 hp (149 kW) rating on the standard 350 cu in (5.7 L) motor. This was the final year for the LT1 engine, rated at 255 hp (190 kW), and the ZR1 racing ...
The power rating for the 350 cu in (5.7 L) L48 base engine decreased from 300 to 270 horsepower and the optional special high-performance LT1 engine decreased from 370 to 330 horsepower. The LS5 454 cu in (7.4 L) motor was carried over and produced 365 hp (272 kW; 370 PS).
The Chevrolet small-block engine refers to one of the several gasoline-powered vehicle engines manufactured by General Motors. These include: The first or second generation of non-LS Chevrolet small-block engines; The third, fourth, or fifth generation of LS-based GM engines; The Chevrolet Gemini small-block engine