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Allard J2X-C
The Allard J2X-C, or the Allard J2X as it is sometimes referred to, was a Group C sports racing car built by Allard in 1992 for use in international sports car racing events. It featured a 3.5-litre Cosworth DFR V8 engine, capable of producing around . The J2X-C had bodywork that is more reminiscent of modern Le Mans Prototypes than a conventional Group C car, but the engine proved too weak for the level of downforce, and this, coupled with the fact that Allard Holdings were liquidated during the car's development, severely restricted the J2X and prevented it ever reaching its potential. One car was built.
==Development==
In the 1980s, Chris Humberstone, who had a history of designing cars for various Formula One teams, licensed the rights to the Allard name from Alan Allard, the son of the company's founder, Sidney. After a few years of wrangling, the company hired Hayden Burvill from Brun Technics to begin developing the J2X-C.〔 He was joined in 1991 by John Iley, who was hired as the aerodynamicist, and the car was designed to have as little frontal area as possible, giving it a unique look.〔 Although it was originally planned to use a Chevrolet small block-derived V8 engine,〔 the car was instead fitted with a 3.5-litre Cosworth DFR V8 engine, derived from a Formula One engine, which produced about of power and of torque. The gearbox was also from an F1 car: a Leyton House-March Engineering 6-speed sequential manual transmission modified for endurance racing.〔 This transmission would prove to be problematic throughout the car's lifetime.〔
The J2X-C used double wishbone suspension, with push-rod actuated coil springs over dampers at both ends of the car; the front suspension was mounted on the carbon-fibre monocoque, whilst the rear suspension was mounted to a carbon-fibre sub-structure that had been designed to allow quick transmission replacement.〔(【引用サイトリンク】title=Allard J2X-C )〕 The car's radical bodywork generated a high amount of downforce; it was calculated to give approximately of downforce at , and at .〔 However, some of the more conventional cars were able to match this level of downforce; the works Toyota TS-010s had a claimed maximum downforce of over , for example.〔 It was, however, higher than the works Nissan R91CP, which had a claimed maximum of at , whilst the 1993 Joest-Porsche 962C had a claimed maximum of at .
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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