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Spec Racer Ford
Spec Racer Ford is a class of racing car used in Sports Car Club of America (SCCA) and other series road racing events. The Spec Racer Ford, manufactured and marketed by SCCA Enterprises (a subsidiary of SCCA, Inc.), is a high performance, closed wheel, open cockpit, purpose-built race car intended for paved road courses, such as Mazda Raceway Laguna Seca, Buttonwillow Raceway Park, Road America, Watkins Glen, and many other tracks throughout North America. With more than 871 cars manufactured, it is the most successful purpose built road racing car in the United States.
==History==
Spec Racer was first conceived as low-cost sports racing class by a director of the Sports Car Club of America (SCCA), Ted Cronin, in the early 1980s. The car was developed and originally manufactured by Renault/Jeep Sport USA in Livonia, Michigan under direction of Vic Elford. The car, designed by Roy Lunn, was introduced into SCCA Club Racing in 1984 as "Sports Renault." After Renault bowed out of the program in 1989, the car was renamed "Spec Racer (SR)." The original Sports Renault/Spec Racer is no longer an SCCA class, although a few Renault powered cars still compete in National Auto Sport Association (NASA), Midwestern Council of Sports Cars Club (MCSCC) and Independent Motorsports Group (IMG) events. By 1994, the supply of rebuildable 1.7-liter Renault engines was drying up in the United States. The SCCA made the decision to replace the original Renault drivetrain with a 1.9-liter engine and five-speed transmission manufactured by the Ford Motor Company. This change gave the SRF an additional to 105 - enough to push the cars along at speeds up to . Ford Motor Company started to provide a new drivetrain in 1994 and the cars with the Ford powertrain renamed "Spec Racer Ford (SRF)." For a period of time, both Spec Racers (Renault powered) and Spec Racer Ford (Ford powered) both raced in the SCCA. Other more recent changes to what is now called "Spec Racer Ford" include the now-standard "tallman kit", which is an extension of the original rear roll hoop (which was designed too low), Penske shock absorbers in addition to the original Konis, Butler Built driver seat, alloy wheels, rear wheel well cutouts, engine coolant recovery system, adjustable fuel pressure regulator, a safety modification to the brakes and an optional, smaller alternator. During the life of the car, there have been some incremental changes in various parts to increase durability. Tires are Goodyear Eagle Racing four-shallow-groove slicks and full-deep-groove Gatorback-style rain tires specifically manufactured for the SRF. The SRF still uses the original Renault brake rotors, calipers (an alternate, vented brake rotor is available) outer CV joints, and suspension knuckles.
In early 2013, SCCA Enterprises announced a third generation (Gen 3) Spec Racer Ford to be powered by a 1.6-liter 4-cylinder Ford engine that will be fitted to the existing engine mounts and transmission. On-track testing by a fleet of test cars will be conducted during 2013 and 2014 for a roll-out into SCCA competition in 2015. The existing Ford 1.9-liter Spec Racer will continue to be eligible for SCCA Club Racing a separate class until the end of the 2017 season.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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