General Motors LS-based small-block engine: Difference between revisions

Revision as of 15:08, 6 October 2004

Revision as of 15:11, 6 October 2004

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The '''LS''' is '''Generation III''' and '''Generation IV''', the latest evolution of [[General Motors]]' line of [[GM Small-Block engine|small-block]] [[V8]] engines. The LS series is an evolution of the [[GM LT engine|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|Cadillac CTS V-series]], and the late Camaro/Firebird V8 models.

=Generation III=

The '''Generation III''' small-blocks replaced the LT family in 1998. These shared the same rough displacement and bore spacing (4.4 in) but much was changed. The bore was reduced to 3.9 in and the stroke longer at 3.62 in for greater torque. The block was cast from aluminum (for cars) instead of iron and had improveda ignitionnew intake and intakeinjection systemstechnology and [[coil-on-plug]] ignition. The traditional five-bolt pentagonal cylinder head pattern was replaced with a square four-bolt design, and the pistons are flat instead of domed.

==LS1==