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2009 Corvette ZR1
Below: Bottom view of the intercooler (left) and 11 rib supercharger drive belt (right). A toothed belt design was tested but deemed too noisy for production.
Right: Official GM torque and power curve for the LS9, the most powerful engine ever from GM.
It's Official!Chevrolet, on April 25, 2008, announced that they have completed SAE certification for the power rating of the ZR1's supercharged LS9 V-8 engine.
The results: 638 horsepower (476 kW) and 604 lb.-ft. of torque (819 Nm). This calculates out to 1.69 horsepower / cubic inch of displacement, a very impressive number that exceeded expectations.
|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:||A356-T6 rotocast aluminum|
|Valvetrain:||overhead valve, 2 valves per cylinder|
|Fuel delivery:||SFI (sequential fuel injection)|
|Horsepower / kW:||638 / 476 @ 6500 rpm|
|Torque (lb-ft / Nm):||604 / 819 @ 3800 rpm|
|Fuel shut-off (rpm):||6600|
|Recommended fuel:||premium required|
|Exhaust manifolds:||stainless steel|
|Main bearing caps:||forged steel|
|Camshaft:||hollow steel; 0.555-in (14.1 mm) lift|
|Connecting rods:||forged titanium|
|Exhaust valves:||hollow steel|
|Valve lifters:||hydraulic roller|
|Supercharger:||R2300, four-lobe "Roots" type (2.3L)|
|Additional features:||piston oil-spray cooling; direct-mount ignition coils; 11-rib accessory drive|
(Official GM specs)
|0 - 60 MPH:||3.4 seconds|
|0 - 100:||7.0 seconds|
|0 - 1/4 mile:||11.3 seconds (131 MPH)|
|MSRP, including destination:||$130,300|
|Gas Guzzler Tax:||$1700|
|* Includes: Power-adjustable, heated and leather-trimmed sport seats (embroidered with the ZR1 logo); side air bags; Bose premium audio system; navigation system; Bluetooth connectivity; power telescoping steering column; custom leather-wrapped interior available in four colors and more. The Chrome wheels are the only other available option on the ZR1.|
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