The 2005 Speed World Challenge season was the 16th season of the Sports Car Club of America's World Challenge series. The series' title sponsor was television network Speed Channel, who broadcast all the races. Championships were awarded for grand touring and touring cars. The season began on March 18 and ran for eleven rounds. Andy Pilgrim and Cadillac won the championships in GT, and Peter Cunningham and Acura won in Touring Car.
Schedule Rnd Date Circuit Supporting Distance GT Winning Car TC Winning Car GT Winning Driver TC Winning Driver 1 March 18 Sebring International Raceway, Sebring, Florida American Le Mans Series(12 Hours of Sebring) (TC) (GT) Dodge Viper Acura TSX Tommy Archer Peter Cunningham 2 April 3 Streets of St. Petersburg, Florida IndyCar Series(Grand Prix of St. Petersburg) (TC) (GT) Dodge Viper Mazda 6 Tommy Archer Randy Pobst 3 April 16April 17 Road Atlanta, Braselton, Georgia American Le Mans Series(Grand Prix of Atlanta) (TC) (GT) Cadillac CTS-V Acura TSX Max Papis Pierre Kleinubing 4 May 22May 21 Mid-Ohio Sports Car Course, Lexington, Ohio American Le Mans Series(Grand Prix of Atlanta) (TC) (GT) Porsche 911 Cup Acura TSX Wolf Henzler Pierre Kleinubing 5 June 25June 26 Burke Lakefront Airport, Cleveland, Ohio Champ Car World Series(Grand Prix of Cleveland) (TC) (GT) Porsche 911 Cup Acura TSX Robin Liddell Pierre Kleinubing 6 July 2 Lime Rock Park, Lakeville, Connecticut American Le Mans Series(New England Grand Prix) (TC) (GT) Cadillac CTS-V BMW 325i Max Angelelli Bill Auberlen 7 July 17July 16 Infineon Raceway, Sonoma, California American Le Mans Series(Grand Prix of Sonoma) (TC) (GT) Chevrolet Corvette C6 BMW 325i Lou Gigliotti Bill Auberlen 8 July 30July 31 Portland International Raceway, Portland, Oregon American Le Mans Series(Portland Grand Prix) (TC) (GT) Chevrolet Corvette C6 Mazda 6 Dino Crescentini Randy Pobst 9 August 13August 14 Streets of Denver, Colorado Champ Car World Series(Centrix Financial Grand Prix of Denver) (TC) (GT) Porsche 911 Cup Acura RSX Wolf Henzler Eric Curran 10 September 4September 3 Mosport International Raceway, Bowmanville, Ontario American Le Mans Series(Grand Prix of Mosport) (TC) (GT) Cadillac CTS-V Mazda 6 Ron Fellows Charles Espenlaub 11 October 16 Mazda Raceway Laguna Seca, Monterey, California American Le Mans Series(Monterey Sports Car Championships) (TC) (GT) Cadillac CTS-V Audi A4T Max Papis John Angelone
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