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Generation: C6 Year: 2007 VIN: C6R-007 Race Numbers: 3, 63 Ownership: General Motors Corp / Pratt & Miller (2007 - 09) Charles (Chuck) Ungurean (2009-present) Sponsors: Compuware Klein Tools AER XM-Radio Mobil-1 GM Goodwrench GM-UAW Drivers: Johnny O'Connell; Jan Magnussen; Ron Fellows Status: Original Color: yellow Tires/Wheels: BBS wheels were re-introduced for 2006. Front wheels are 18 x 12.5. Rear wheels are 18 x 13 Tires are Michelin racing tires. Front tires are 290/33-18. Rear tires are 310/41-18 Brakes are 4 wheel disc with monoblock calipers, carbon rotors and pads. CHASSIS/DRIVELINE/TRANSMISSION Most of the suspension and driveline components were continuations of the C5R package. But the new C6 and C6R also included specific changes in the chassis. Although the chassis remained as the hydroformed steel unit, there were changes in the overall chassis layout. The new wheelbase is 105.7 (1 shorter) and the overall length of 177.6 was also 5 shorter. The cars width is 78.7 and height is 45.8. The front track is 62.2 and the rear track is 63.1. Vehicle weight is 2425 lb. The suspension design remains as independent front and rear, featuring short/long double wishbones, steel fabricated upper and lower A-arms, machined aluminum knuckle, coil-over multi-adjustable shock absorbers and a mix of anit-roll bars. Engine: The 2005 season saw the introduction of the LS7.R racing engine. Lighter and more powerful than previous Corvette powerplants, the LS7.R shares technology with the production 505 hp LS7 that powers the 2006 Corvette Z06 supercar. The 7.0 liter 427 aluminum engine a 4.180 diameter cylinder bore and a 3.875 crankshaft stroke. The engine uses a dry sump oiling system with electronically managed sequential fuel injection system. Individual runners (versus stock throttle body) and CNC-ported cylinder heads are used to tune the flow of air to the engine. Horsepower and torque were estimated at 590 HP and 640 lb/ft. The electronics package continues to use two Delphi Electronics engine computer-and-ignition systems and a complete Pi Research Systems 6 dashboard display, data acquisition and telemetry system that includes motion sensors on the front and rear suspensions. A Kinsler racing fuel-injection system, with elaborate cross-ram air horns and a composite airbox between the engine and the hood, breathing through an air intake behind the headlamps, is retained. An aluminum motor plate mounts to the front of the block, with a structural aluminum oil pan and a modified stock aluminum front subframe. While the small-block V-8's fundamentals and configuration remained largely unchanged from the original 427 small blcok, the LS7.R's internal components were designed to reduce horsepower losses due to internal friction and to reduce rotating mass. Commencing in 2008, the ALMS moved to E-85 ethanol fuel. Only minor adjustments were required to respond to the new fuels more corrosive characteristics. Driveline: The question of further transmission changes is being researched. The balance of the drivetrain probably retained the 5.5-in. triple-disc Tilton carbon clutch, and a Pratt & Miller 3.11:1 rear end with Metalore axles and CV joints. Top: Interior: Condition: URL: David Palmeter web site at: http://palmeter.com Corvette Racing (US) at: http://corvetteracing.com Corvette Motorsport (Europe) at: http://corvettemotorsport.com Unique Characteristics: Both the chassis and the aerodynamic package changed considerably in 2005 with the introduction of the new C6R. New ALMS regulations required more extensive use of the production car's chassis structure, retaining items such as the central drivetrain tunnel, the windshield frame and the rear bumper. Exterior changes in the sixth-generation Corvette include a single, large grille opening for the engine air intake, radiator, and brake cooling; flush headlights for better aerodynamics; and a smaller, sleeker shape that reduced drag. GM Racings assisted with CFD (computational fluid dynamics) analysis before the start of the season, to determine the effects of changes in ride height on the aero balance of the car. PAINT SCHEME: Paint scheme is very similar to previous cars, being solid yellow with (new) black center stripes and E-85 Ethanol logo Modifications: Notes/Race History: See http://corvetteracing.com web site hosted by NCM for event results and for a narrative description of the season highlights. Registry ID Number: 511 View Original Size  Car # 3 at Sebring 2008 - courtesy of General Motors Corp |