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The Generation III small-blocks replaced the LT family in 1997. These shared the same rough displacement and bore spacing (4.4 in) as their cast iron predecessors but almost everything else 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 a new intake and injection technology 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. Even the cylinder firing order was changed.
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:
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.
The VortecVortec is General Motors trademarked name for a line of piston engines for trucks. The name first appeared in 1986 on a 4. 6 liter V6 but now adorns a wide range of different engines. Modern Vortec engines are named for their displacement There are a numb 4800Vortec is General Motors trademarked name for a line of piston engines for trucks. The name first appeared in 1986 on a 4. 6 liter V6 but now adorns a wide range of different engines. Modern Vortec engines are named for their displacement There are a numb, 5300Vortec is General Motors trademarked name for a line of piston engines for trucks. The name first appeared in 1986 on a 4. 6 liter V6 but now adorns a wide range of different engines. Modern Vortec engines are named for their displacement There are a numb, and 6000 are cast-iron versions of the LS1 engine with different bore and stroke dimensions.