General Motors LS-based small-block engine
The LS is the latest evolution of General Motors' line of small-block V8 engines. The LS series is an evolution of the LT family. The LS engine has been the sole powerplant of the Chevrolet Corvette, and has also been used in the Pontiac GTO and Cadillac CTS V-series.
LS1
The LS1 was an evolution of the earlier LT small-block V8. 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:
- Corvette base model
- Chevrolet Camaro Z28
- Pontiac Firebird Formula
- Pontiac Firebird Trans-Am
- Pontiac GTO (2004)
LS2
The LS2 is the new base engine in the Corvette. It produces 405hp and 400lbft from the same 5.7 liter package as 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. The C6 Corvette Z06 will get a new GM LS7 engine.
The LS6 shares its block with the GM LS1 engine, but other changes were made. Improved intake and exhaust efficiency 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 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.