1981 Porsche 935 Coupe

During the late 1970's, Porsche continued to develop the 935 for various racing series and specific events. However, by 1979, the factory began to switch its efforts to the 936, 956, and 962 series of racing cars. This change of focus resulted in the termination of the factory built 935's.

However, a demand still existed for the continued development of the 935 design. So with Porsche's blessing, a number of racing teams with close ties to the factory purchased various new components and drivetrains. These teams designed and produced their own upgraded chassis and bodywork. While these newly constructed vehicles were still generally referred to as Porsche 935's, in reality, they were entirely new designs that advanced the 935 concept to a new level of speed and sophistication.

Foremost amongst these constructors were the Kremer Brothers of Cologne, Germany. Having enjoyed a close relationship with the factory since 1970, Kremer was allowed to proceed independently with further development of many models of racing Porsches. By 1981, Kremer was ready to produce its fourth version (K4) of the Porsche 935.

01 is the first of two K4's produced, and as a result of Kremer's constant development, bore little resemblance to an early 935. The K4 had evolved into a totally different vehicle, but on a full tubular chassis, with only a roof and windshield being supplied by the Porsche factory. While the bodywork was entirely Kremer's design, it was inspired by the special 'Moby Dick' style bodies produced by Porsche in 1978. 01's body was continually upgraded by John Fitzpatrick during the 1982 season as he further refined the aerodynamics. Mechanically the K4 continued to develop the 'tried-and-true' 935 Turbo motor by using enhanced air-to-air intercoolers. 01 uses special ductwork through the doors to channel cool air to the intercoolers, resulting in a 50 horsepower advantage over other 935s.

01 was raced by Kremer in Europe during 1981, usually driven by Bob Wollek. John Fitzpatrick bought the car for the 1982 season and contested at least 15 events, primarily in the United States, with 5 wins and only one DNF. 01 continued to race sporadically in 1983 and 1984 with appearances at Riverside, Sebring, Miami and Road Atlanta. With drivers such as Bob Wollek, John Fitzpatrick, David Hobbs, Derek Bell, Al Holbert and Preston Henn, this Kremer K4 represents the end of one of the greatest eras of GT racing.

This vehicle is fitted with a Porsche four-speed synchromesh, ZF transmission with a limited-slip differential. The flat-six engine has an aluminum block and head, dry sump lubrication, dual ignition, and a Kugelfisher Fuel Injection system. The 2994cc unit has twin turbochargers and around 850 to 900 horsepower. The car weighs just 2100 pounds and has a top speed of 220 mph when fitted with the LeMans gearing. There are Type 917 disc brakes on all four corners to help keep the car in the drivers control.

By Daniel Vaughan | Feb 2008