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RallyCross, also known as RallyX, is a type of car competition in the United States and Canada, sanctioned by Sports Car Club of America (SCCA). It is a timed event that involves solo driving on grass or dirt and can be considered "autocross on the dirt." As with autocross, the emphasis is on driver skill and handling rather than absolute speed ...
A cross car on a Czech autocross course. Autocross is a form of motorsport in which competitors are timed to complete a short course using automobiles on a dirt or grass surface, excepting where sealed surfaces are used in United States. Rules vary according to the governing or sanctioning body, such as the length of the course, the amount of ...
The SCCA sanctions "RallyCross" events, similar to autocross, but on a non-paved course. [11] SCCA ProRally was a national performance rally series similar to the World Rally Championship. At the end of the 2004 season SCCA dropped ProRally and ClubRally. A new organization, Rally America, picked up both series starting in 2005.
The SCCA National Sports Car Championship was a sports car racing series organized by the Sports Car Club of America from 1951 until 1964. It was the first post- World War II sports car series organized in the United States .
The rules for the class include the General Competition Rules (GCR), a section of the SCCA rulebook that defines the basic setup and preparation for cars in any class of SCCA racing. Improved Touring cars are also subject to the rules in the Improved Touring Category Section (ITCS) of the rulebook, which define the specific classes and provide ...
For SCCA SM, the Hoosier SM7.5 is the dry tire and SMW (SM Wet) is the wet tire. For NASA, the Toyo RR is the dry tire and RA-1 is the wet tire. (205/50R15) is the spec tire size. Hoosier Tires [5] will provide the spec tire for all National SCCA Events. The wheel size is fixed at 15 × 7, with the wheels weighing no less than 13 pounds.
[1] [2] The rules denoted the cars must be two-wheel-drive, use a steel tube frame or unibody chassis, and have an engine displacement ranging between 2.0 L (120 cu in) and 3.8 L (230 cu in). Certain vehicles used in the SCCA World Challenge were also eligible to compete in this division.
Formula C was an open wheeled SCCA racing class originating in the mid-1960s, derived from the failed Formula Junior class. Formula C cars were very similar to Formula Juniors; Formula B was a similar class with uprated 1600 cc engines.