The LS9 Engine! V8 Supercharged Aluminum-Block Engine
Info courtesy of GM
The ZR1 (very limited availability) is powered by a 6.2 Liter aluminum-block V8 boosted by an Eaton® TVS™ (Twin Vortices Series) supercharger for a total power output of 638 hp at 6500 rpm and 604 lb.-ft. of torque at 3800 rpm. It is the most powerful motor ever to occupy the engine bay of a General Motors production car.
The supercharger features four lobes instead of the usual three for higher power and efficiency. It also features an intercooler to cool down the air/fuel charge for more power. In addition, nozzles squirt cooling oil into the underside of each piston.
The engine also features a dual-pressure fuel injection system for peak performance during multiple operating conditions.
Like the LS7 engine in the Z06, the LS9 features titanium connecting rods and exhaust valves as well as a dry-sump oil system with a larger capacity reservoir − now 10.5 quarts. The LS9 is hand-assembled at the GM Performance Build Center in Wixom, Mich.
Displacement (cu in / cc): 376 / 6162
Bore & stroke (in / mm): 4.06 x 3.62 / 103.25 x 92
Block material: cast aluminum
Cylinder head material: cast aluminum
Valvetrain: overhead valve, 2 valves per cylinder
Fuel delivery: SFI (sequential fuel injection)
Compression ratio: 9.1:1
Horsepower / kW: 638 / 475
Torque (lb-ft / Nm): 604 / 835
Recommended fuel: premium required
EPA estimated fuel economy: TBD
Dry-Sump Oil System
The dry-sump oil systems on the Z06 LS7 and ZR1 LS9 engines prevent oil starvation on high-g corners or under heavy braking. The system uses an additional oil reservoir separate from the crankcase and pumps oil through the engine to ensure proper lubrication under high-performance situations. Oil capacity has been increased to 10.5 quarts for 2009
A video of the oils jorney in the LS7 or LS9 engine!
Here is a great video of them building an LS9 in the factory!
This is a great video of the Supercharger Assembly!
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