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Generation: C5 Year: 1999 VIN: Race Numbers: 73, 31 Ownership: 3R Racing (Denver, CO) Sponsors: 2002-05: Luchts Concrete/Aggregate Industries 3R Racing 2006-2008: Whelen Engineering Drivers: Phil McClure (2000 to 2004) Sonny Whelen (2005 to present) Status: Original Color: red, whie and blue (# 73) Tires/Wheels: Wheels: Max 18” x 12” Front: 11x18” with 275x35x18” Toyo Proxes RA-1 race compound Rear: 12x18” with 335x30x18” Toyo Proxes RA-1 race compound Engine: # 73 - 2002-04 – C5 configuration: Front-engine, rear-wheel drive, V8 5780 cc displacement (5.7 litre), 16 valves, 12:0:1 compression, estimated 505 bhp, 448 lb/ft of torque at 7800 RPM NOTE: SCCA permitted certain modifications. These included balancing, blueprinting, a 1.0mm overbore permitted. Alternate approved camshaft, crankshaft, and heads provided they are acquired through GM Motorsports. Engine management systems were free. All cars required an on-board starter system # 31 - 2006 – C6 configuration: LS-2; dry-sumped Front-engine, rear-wheel drive, two-door coupe LS-2 V8 aluminum block and heads, 6026 cc displacement (6.0 litre), 16 valves, 12:0:1 compression, estimated 520 bhp, 465 lb/ft of torque at 7400 RPM NOTE: SCCA permitted an 0.5mm overbore, as well as an alternate approved camshaft, crankshaft, and heads are permitted, available through GM Motorsports. After 2005, cars were permitted to may use the new 6.0 litre motor. Driveline: # 73 - 2002-04 – C5 configuration: Wheelbase: 104.5” Base weight: 3000 lb; 50/50 distribution Transmission and differential oil coolers were permitted. Limited slip differentials are permitted. One set of gear ratios and two final drive ratios were permitted. For 2002 a new Tremek 6-speed transmission was approved for both the SCCA world Challenge. It is not clear how many of the teams switched to the new 6-speed transmission. # 31 - 2006 – C6 configuration: 6-speed transmission Limited slip Wheelbase: 104.5” Base weight: 3000 lb; 50/50 distribution Top: Interior: interior gutted as per World Challenge rules Condition: URL: Unique Characteristics: Modifications: # 73 - 2002-04 – C5 configuration: Suspension pieces must be of the OEEM-type. Relocation of upper pick-up points permitted by 75 mm and 25 mm lower. Shocks and springs are free providing they are dimensionally correct for OE pick-up points and are of the OEM-type. Anti-sway bars are free. Bushings are free. Steering geometry may be modified to correct bump steer due to lowering cars. Alternate approved bodywork permitted. # 31 - 2006 – C6 configuration: Fabricated upper A-Arms Alternate approved bodywork. Notes/Race History: The car was originally built by Phil McClure and 3-R Racing (Bob Raub, Denver, CO) The car ran as # 73 in red, white and blue (flag) livery At the end of the 2005 season, Whelen Engineering purchased the car for the 2006 season. The car was reconfigured to current race regulations and re-bodied as a C6. The mechanicals were the same as for # 30 Eric Curren (team-mate). Registry ID Number: 220 View Original Size  |