The SPEED World Challenge is an American auto racing series that is sanctioned by the Sports Car Club of America. It is a sports car series that consists of two classes: touring car and GT. Auto racing (also known as automobile racing or autosport) is a sport involving racing automobiles. ... The SCCA could be considered the grass-roots level of auto racing in the United States. ... Honda NSX sports car TVR Tuscan sports car New style 2005 Ford Mustang Ruf RGT A sports car is a type of automobile designed for sporting performance. ... -1... GT may stand for: Golden Tee (video golf game from Incredible Technologies, Inc. ...

The series was founded in 1972, and was called "showroom stock." A revised version of the series came about in 1984. In 1985, the series got an odd title sponsor — the magazine Playboy. Whistler-brand radar detectors also sponsored the series for a time in the 1980s. 1972 was a leap year that started on a Saturday. ... 1984 is a leap year starting on Sunday of the Gregorian calendar. ... 1985 is a common year starting on Tuesday of the Gregorian calendar. ... A collection of magazines A magazine is a periodical publication containing a variety of articles on various subjects. ... Playboy is an adult entertainment magazine, founded in 1953 by Hugh Hefner, which has grown into Playboy Enterprises, Inc. ... A radar detector is an electronic device used by motorists to determine if their speed is being monitored. ... // Events and trends The 1980s marked an abrupt shift towards more conservative lifestyles after the momentous cultural revolutions which took place in the 1960s and 1970s and the definition of the AIDS virus in 1981. ...

Each season usually consists of 10 rounds, with each class running a race at separate times.

The series is named for the network that broadcasts it: SPEED Channel. In fact, when SPEED Channel was SpeedVision, it was called the SpeedVision World Challenge. SPEED Channel commentator Leigh Diffey was the voice of the series until SPEED let him go after 2004. Beginning in 2005, Diffey will be replaced by Greg Creamer. SPEED Channel, based in Charlotte, was launched on New Years Day 1996, by Roger Werner, as SpeedVision. ... Leigh Diffey (born on March 3, 1971 in Brisbane) is an Australian auto racing commentator. ... 2004 is a leap year starting on Thursday of the Gregorian calendar. ... 2005 is a common year starting on Saturday of the Gregorian calendar and is the current year. ...

A rival series organized by IMSA, the Firestone Firehawk Racing Series, also featured two similar classes of competition and existed in the 1980s and 90s. The International Motor Sports Association is an American auto racing sanctioning body. ... Firestone tire The Firestone Tire and Rubber Company was founded by Harvey Firestone in the late 19th century to supply pneumatic tires for wagons, buggies, and other forms of wheeled transportation common in the era. ... // Events and trends The 1980s marked an abrupt shift towards more conservative lifestyles after the momentous cultural revolutions which took place in the 1960s and 1970s and the definition of the AIDS virus in 1981. ... Events and trends The 1990s are generally classified as having moved slightly away from the more conservative 1980s, but keeping the same mind-set. ...

External links

The SPEED World Challenge's official website SCCA Pro Racing