GM LS engine
The LS is Generation III, the latest evolution of General Motors' line of small-block V8 engines. The LS series is an evolution of the LT family but is all-aluminum and has 6-bolt mains. New intake and injection technology and coil-on-plug ignition boosts performance. The LS engine has been the sole powerplant of the Chevrolet Corvette, and has also been used in the Pontiac GTO, the Cadillac CTS V-series, and the late Camaro/Firebird V8 models.
The Vortec 4800, 5300, and 6000 are cast-iron versions of the LS1 engine with different bore and stroke dimensions.
LS1
The LS1 was an evolution of the earlier LT small-block V8 (and is almost identical to the LT4 except for its aluminum construction). It is an all-aluminum 5.7 liter (5665 cc) pushrod engine and produces 350 hp (261 kW) and 375 ft.lbf (508 Nm) of torque. It shares its block with the higher-output LS6.
It is used in the following vehicles:
LS2
The LS2 is the new base engine in the Corvette. It produces 405hp and 400lbft from a new 6.0 liter V8 based on the old LS1. It is similar to the high-performance LS6, and a higher-performance version of this engine will be called the LS7.
The LS2 debuted in the 2005 Chevrolet Corvette, and will be used in the 2005 Pontiac GTO.
LS6
The LS6 is a higher-output version of Chevrolet's small-block LS1 engine. It is an all-aluminum 5.7 liter (5665 cc) pushrod engine and produces 405 hp (302 kW) and 400 ft.lbf (542 Nm) of torque. It is used in the high-performance C5 Corvette Z06 model and the Cadillac CTS V-Series. The C6 Corvette Z06 will get a new LS7.
The LS6 shares its block with the GM LS1 engine, but other changes were made. Improved intake, a titanium exhaust, higher-lift cams, and higher compression boosts output, and a new oiling system is better suited to high lateral acceleration.
LS7
The LS7 is the latest high-power LS engine. It is based on the LS2 but is said to be much more powerful. It might even be the first twin-cam pushrod engine. It will be hand-built by the General Motors Performance Build Center in Wixom, Michigan. Up to 15,000 LS7s will be produced each year starting in 2005.
See also
