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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]
For 1991, the 700R4 was renamed to the 4L60. The TBI (throttle body injection) system used on the Blazer's standard 5.7 liter V8 had longer throttle shaft bearings, new throttle return springs, and improved fuel mixture distribution. The 5.7 liter V8 also had new heavy-duty intake valves and powdered metal camshaft sprockets.
The traditional five-bolt pentagonal cylinder head pattern was replaced with a square four-bolt design (much like the 1964–1990 Oldsmobile V8), and the pistons are of the flat-topped variety (in the LS1, LS2, LS3, LS6, LS7, LQ9, and L33), while all other variants, including the new LS9 and LQ4 truck engine, received a dished version of the GM ...
In 1988, it was upgraded with throttle-body fuel injection and roller lifters. For the 1992 Magnum update, the throttle-body fuel injection was upgraded to a multi-port fuel injection system. In 1997, it was then upgraded to sequential fuel injection. The engine was produced through 2003 before it was replaced with the 3.7 L PowerTech V6.
The only changes made to the LS1 compared to the Corvette were the relocation of drive belt accessories to accommodate the Camaro’s engine bay, an oil pan tailored to the F-body, as well as opting for a cable-actuated throttle body, as opposed to the Corvette’s drive-by-wire. 1998 was the only year LS1 powered models had a working coolant ...
The 4L60 however is hydraulically shifted based on governor pressure and throttle valve (TV) cable position. 1992 was the last year of widespread usage of the 700R4 (4L60). The 1993 Camaro, Corvette and Typhoon were equipped with the last production 700R4. The last design change of the 700R4 was an added checkball to the valve body.