Dauer 962 Le Mans
|Dauer 962 Le Mans|
|Also called||Dauer 962|
Dauer 962 LM
|Production||1993-1997 (13 cars)|
|Designer||Achim Storz of Porsche|
|Body and chassis|
|Body style||2-door Group C race car|
|Layout||Mid-engine, rear-wheel drive|
|Related||Porsche 962 |
DP Motorsports DP962
|Engine||3.0L Porsche Type 935 KKK twin-turbocharged Flat-6|
730 hp @ 7400 rpm
517 lb·ft @ 5000 rpm
|Length||4650 mm (183.1 in)|
|Width||1985 mm (78.1 in)|
|Height||1050 mm (41.3 in)|
|Curb weight||1080 kg (2381 lb)|
The Dauer 962 Le Mans is a sports car based on the Porsche 962 race car. Built by German Jochen Dauer's Dauer Racing, a racing version of this car went on to win the 1994 24 Hours of Le Mans with the support of Porsche through the use of regulation loopholes.
The win in 1994 makes it the first GT1 sports car to finish first in the Le Mans event.
Changes to meet road regulations
Components of the bodywork were replaced with slightly revised carbon fiber and kevlar panels. The under tray was replaced with a flat version for better stability at high speeds. A second seat and leather upholstery were installed in the cramped cockpit, as well as a video screen for DVD playback in later years. A small compartment was added to the front of the car to carry luggage. A hydraulic suspension system was also added to meet German ride height requirements for street cars.
The 962 Le Mans uses nearly the same engine as the racing 962: Porsche's water-cooled Type-935 2994 cc Flat-6 with two Kühnle, Kopp und Kausch AG turbochargers. Since the road car did not have to meet racing regulations, the air restrictor was removed allowing for an output of approximately 730 hp (544 kW). The 5-speed racing gearbox was also retained.
The drivetrain also stood the same, being rear-wheel-drive.
A top speed of 251.4 mph (404.6 km/h) was independently measured in 1998. Other performance figures included a 0-62.1 mph (100 km/h) in 2.8 seconds and 0-124.3 mph (200 km/h) in 7.3 seconds. The Dauer 962 was called the 'fastest street-legal production car in the world' in the Evo September 2003 issue. It was succeeded by the Bugatti Veyron which reached 253.81 mph (408.47 km/h) in 2007.
Following rule changes in the World Sportscar Championship in 1992 which saw Porsche 962 numbers dwindle in Europe, including at the 24 Hours of Le Mans, Porsche was looking for ways to continue their sports car efforts. Although 962s were still legal at Le Mans, the cars were subjected to newer technical regulations that negatively affected their performance, subsequently ceasing to be competitive against the current top entrants in its class.
With the re-introduction of production-based grand tourer-style cars in 1993, the Automobile Club de l'Ouest (ACO) had created a loophole as no specific number of road-going examples was established within its homologation requirements. With Dauer's success in modifying a Porsche 962 into a street-legal car in 1993, Porsche saw an opportunity to bring the 962 back into competition.
With the first production car shown to the public in 1993, Porsche had only to meet certain design criteria--the requirement that production-based cars have storage space for a typical suitcase had already been fulfilled, as the Dauer road car was able to carry luggage. The flat bottom of the 962 Le Mans also fit with GT rules. Three more modifications were necessary to fully comply: Narrower tires than the 962 had run in Group C, a larger fuel tank (now up to 120 litres), and the reinstallation of a restrictor for the engine, although this one would be larger than the one they had run in Group C.
The flat bottom and narrow tires of the 962 Le Mans would hinder the performance of the car over the long laps at Le Mans even with the increased power from the GT-class air restrictor. However Porsche believed that the larger fuel tank they were allowed in the GT-class would allow them to overcome this lack of speed by spending less time in the pits than the Group C cars, something which is key for an endurance race.
A total of two Dauer 962 Le Mans race cars were built. Arriving at Le Mans with the support of Porsche's factory racing team, Joest Racing, Dauer's two cars showed that they lacked the overall pace of the top Group C cars by qualifying fifth and seventh. However their pace in their class was shattering as the next closest GT1-class car could only muster 12th. The race saw Porsche's plan pan out, as the Dauer 962 Le Mans were able to gradually make their way to the top of the standings while their competitors spent time in the pits or succumbed to mechanical woes. In the end, only a lone Toyota 94C-V in the Group C class could contend with the Dauers, taking second place overall. The Dauer 962 Le Mans of Yannick Dalmas, Hurley Haywood, and Mauro Baldi would take the overall win while the second team car would finish one lap behind in third place overall.
Soon after this event the ACO attempted to fix the loophole in the GT regulations by setting a minimum requirement for production cars to meet homologation standards. With this, the Dauer 962s would never race again, nor would the normal Porsche 962s as the Group C class was finally abandoned.
- "Dauer 962 Le Mans Booklet" (PDF). Archived from the original (PDF) on 23 June 2004.
- QV500.com: Dauer 962 LM
- QV500.com: Dauer 962 LM sport
- Evo September 2003: p.106-109
- "''400 and Beyond''". bugatti.com. 19 April 2005. Archived from the original on 11 October 2007. Retrieved 9 April 2012.
- Porsche USA - 1994 Dauer 962