Grand Touring Over

Grand Touring Over (GTO)[1] is the name of a former classification designated to grand touring cars competing in sports car racing, originally by IMSA in the IMSA GT Championship, and later by Grand-Am in the Rolex Sports Car Series. IMSA used the class between 1971 and 1991,[2] and Grand-Am used the class for a single season in 2000. The class had its origins in the original "TO" class used by the SCCA in the Trans-Am series, and was also similarly modeled to the FIA's Group 4 and Group 5 racing classes, but eventually evolved over time into its own category.[3] The class specified an engine displacement of more than 2.5 L (150 cu in), with engine design and number of cylinders being unrestricted. turbocharging and supercharging was allowed on engines up to a size of 6.0 L (370 cu in). Engines over 6.0 L (370 cu in) were required to be naturally aspirated. The original class became known as Grand Touring Supreme (GTS) in 1992.[4]

  • Porsche 911
    Porsche 911
  • Audi 90 Quattro
    Audi 90 Quattro
  • Nissan 240SX
    Nissan 240SX
  • Ford Mustang Cobra
    Ford Mustang Cobra
  • Oldsmobile Toronado
    Oldsmobile Toronado
  • Merkur XR4Ti
    Merkur XR4Ti
IMSA GTO cars at Road Atlanta in 1981

References
  1. https://alex62.typepad.com/imsablog/2006/01/do_you_want_to_.html
  2. https://www.racingarchives.org/tag/imsa/
  3. https://historicmotorsportcentral.com/2016/03/14/focus-the-imsa-gt-championship-story/
  4. https://www.carthrottle.com/post/wb9bo9x/
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.