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Generation: C6 Year: 2004 VIN: C6R-002 Race Numbers: 4, 64, 19, 73 Ownership: General Motors Corp / Pratt & Miller (2005); DKR (PSI Experience) (2006 to 2008); DKR / Sangari Team Brazil (2009) DKR/SRT - Mad Croc Racing consortium (2010) Sponsors: Compuware Klein Tools AER XM-Radio Mobil-1 GM Goodwrench GM-UAW Drivers: ALMS and FIA-ACO 24 Hours of LeMans: - Oliver Gavin; - Olivier Beretta; - Jan Magnussen FIA-ACO 24 Hours of LeMans (2010)(# 73) - Julien Jousse - Xavier Massen - Patrice Gouselard Status: Original Color: yellow Tires/Wheels: WHEELS/TIRES OZ wheels were used in 2004-05 but were changed to BBS 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 car’s 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, a further refinement of the GM small-block V-8 that has been the world's most successful production-based racing engine over a span of 50 years. 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 litre 427 aluminum engine used for the C5R car continued as the powerplant. It’s core characteristics included 4.180” diameter cylinder bores 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. The engine uses an external mechanical three-stage oil pump and dry-sump lubrication with the oil tank under the fuel tank. While the small-block V-8's fundamentals and configuration remained unchanged, the LS7.R's internal components were designed to reduce horsepower losses due to internal friction and to reduce rotating mass. In addition, the team took a considerable amount of weight out of the engine, helping the balance of the car while also improving performance. For the 2004 season, and up to 2007, the car ran on 100 octane unleaded racing fuel. Commencing in 2008, the ALMS moved to E-85 ethanol fuel. Only minor adjustments were required to respond to the new fuel’s 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. More research required. Top: Interior: Condition: URL: REFERENCES: David Palmeter web site at: http://palmeter.com Corvette Racing (US) at: http://corvetteracing.com Corvette Motorsport (Europe) at: http://corvettemotorsport.com Unique Characteristics: Just before Christmas 2005, DKR (PSI Experience) sealed a deal with GM to buy C6-002. As a result, DKR (PSI Experience) was the first team to get its hands on a C6R in Europe and around the world…by a few months. Modifications: In response to the ALMS regulatory changes, Pratt & Miller revised both the chassis and the aerodynamic package. The new 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. P&M also introduced new low-friction suspension attachments that made the car quicker to react. Improvements are ongoing. GM Racing's 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. Notes/Race History: RACE HISTORY - SUMMARY: 2005 Racing Season: This car (race # 64) won its class in the 24 Hours of Le Mans with Gavin/Beretta/Magnussen and finished an amazing 5th overall. It also took the ALMS title (race # 4) with Olivier Gavin and Olivier Beretta. Team Corvette scored a 1-2 GT-1 class win at Le Mans class in 2005, fifth and sixth overall. Car # 64 placed first. Car # 63 placed second. See http://corvetteracing.com web site hosted by NCM for event results and for a narrative description of the season highlights. 2006 Race Season C6R-002 was sold to Christian Schumacher’s DKR team in December 2005 to run under the "PSI Experience" name in the 2006 and 2007 European FIA Le Mans Series (formerly Le Mans Endurance Series) and the FFSA GT, a French national GT series. In 2008, DKR branched-off to run under their own name. For 2009, DKR created a new partnership with Sangari of Brazil. The new team will run as "Sangari Team Brazil". For 2010, DKR (#002)combined with SRT #006) to form Mad Croc Racing. Both Mad Croc cars were "borrowed" by LAA for the 24 hours of LeMans, as he had sold his 2009 cars to Baron Rothschild when GM announced its intended shift to the GT2 category. Chassis # 002 was run as the black # 73 car, by LAA. Registry ID Number: 505 View Original Size  Car # 4 at Laguna Seca 2005 - courtesy of General Motors Corp |