In February 1985, Porsche successfully introduced the 944 Turbo with a power plant based on the "924 Prototype" that had run at Le Mans. Despite some early setbacks for the new 944, the development of a four-valve cylinder head on a turbocharged car was continued. The final variant, fitted with a single KKK turbocharger, marked extreme gains in both power and torque with no real adverse effect on emission standards. The next step for a turbo charged 944 was evident.
However, the 944 Turbo was not accepted into most standard GT categories, particularly those of the SCCA or INSA and it was decided that, in order for the 944 Turbo to realize its competition potential, Porsche would have to create the venue. In late 1985, Porsche AG developed the 944 Turbo Cup to provide amateur enthusiasts with a cost effective entry into motor sports. Although initially designed to participate in a single-marque racing series run-in conjunction with German ADAC Supercup races, many examples were put to use in other countries including France, Canada and the US.
Although the Cup cars were essentially standard-production 944 Turbos that where more lively and well suited for track use, the factory built competition machines were equipped with a magnesium oil sump, a smaller generator, stiffer suspension, reinforced gearbox, wider tires and modified engine components including a revised turbocharger. In addition, the 944 Turbo Cup cars were fitted with an eight-point roll cage, driver's Recaro racing seat, manual windows and for weight-saving measures, were striped of many interior components.