1995/97 Porsche 993 3.8 RSR
The cars history starts with the original owner contacting Jurgen Barth of Porsche in 12/20/1994. His request as an individual customer, was to purchase a new 993 SuperCup. As these were only being produced and sold to entrants in the European Porsche Cup series, his initial request was denied. Further requests to Alwin Springer, Director of Porsche MotorSports North America (PMNA) finally made the purchase possible and the sale was approved by Jurgen Barth in April 1995. The car initially offered was not white, but the original owner persisted in his request for Grand Prix white. His persistence paid off.
This was the first ‘permanent resident’ 1995 993 Cup 3.8 delivered to the USA. The first owner of this 911 Cup 3.8 was John Ruther, the owner and President of NorthStar Motorsports in Lake Barrington, Illinois, and former President and current Director for the Chicago region of Porsche Club of America (PCA), as well as the longtime Chief Driving Instructor. It was raced in Porsche Club Amateur racing events and never raced professionally.
During the 1996 race season while at Road America, John Ruther and Alwin Springer met to discuss developments for the 1997 version of the Naturally Aspirated (N.A.) Cup Car. In their discussions, Alwin told John about the new RSR engine. The new engine was extensively different from the prior version. The prior version was the M64/20 and the new version would be a M64/70. The prior version could not be upgraded and to be swapped out. In 1997 the car was returned to PMNA where a M64/70 version of the motor was installed. This engines output was 390 HP. Also installed by the factory was RSR bodywork and suspension components. Thus making this car the only 1995 tub Cup Car with the 3.8 RSR motor, suspension and bodywork, authorized and built by the factory.
The original owner later upgraded to Evolution (EVO) bodywork and a slide valve induction system. The prior induction system was kept for use as needed at specific racetracks. The engines output now was 410HP. Slide valve systems are very rare and they require a special EMU to operate.
This car is the most fully developed N. A. 993 Cup car authorized and built by the factory.
Includes all documentation from the first letter requesting a car in 1994 to present day is maintained and cataloged: from letters, faxes, emails, and receipts.
- The story of how the car came to be was published in Excellence Magazine. We have two mint and one working copy of this issue.
- Adrians Streathers’ book: The Essential 993 referenced this car many times. We maintain a copy of this oft quoted reference book.
- Original PORSCHE parts manuals and operating manuals have been maintained in their original condition.
- The interior, race seats and harness belts are all original.
- Additional specs some possibly duplicated: 1995 Porsche 911 Cup RSR 3.8 Evo, Chassis no. WP0ZZZ99ZSS398084
- One of the last of the air-cooled 993 RS based factory-built Cup cars
- The only 1995 Cup car upgraded to 1997 RSR Evo specification
- Upgraded by Porsche Motorsports North America (PMNA)
- Only two owners since new; never professionally raced
- Never crashed and only campaigned in club racing events
- Includes extensive documentation from PMNA and original correspondence between the first owner and PORSCHE representatives.
Porsche Cup cars are extremely low production models to begin with. In this case, a 1995 993 RS was pulled from the assembly line to create this all-out Carrera Cup race car. Between 1994 and 1998, approximately 374 993 Cup cars were produced, of which a significant number of them have since been written off in racing incidents or modified from their original factory configuration during competition use.
During 1996 Porsche continued to develop improvements for its Cup cars. In 1997, Porsche produced only a handful of RSR Sprint type engines for selective use in 1997 Cup cars. They are a singularly unique engine. The sprint motor is a highly modified 3.8-liter engine with special heads (two valves per cylinder), special camshafts, intake system and butterfly valves. It contains mostly R type Porsche racing parts, including many that are fabricated by hand and some created out of titanium. The engine is coupled with unique resonance-controlled intake runners producing approximately 390 horsepower (SAE). Porsche made additional changes to the RSR in 1997, so they were also made to this car – installed by Andial. These included extensive bodywork, center lock wheels, and suspension upgrades using Porsche “R” parts as installed on the RSR for 1997.
The original owner then added a Teilert Engineering slide valve induction system, shelving the butterfly valves. Only a handful of these systems were hand-crafted by this German Engineering firm. The Cup Motronic ECM was also replaced by a Porsche ECM modified unit to accept this induction combination. With this setup installed on a Sprint motor it produces approximately 410 hp.
Complete and original documentation, invoices and correspondence with Porsche executive management accompany the car. Porsche only sold Cup cars to those who would participate in their racing series, however this car never competed professionally. It has been driven by only two owner-drivers, exclusively in amateur events.
Location: Boca Raton, Florida, United States
See listing: 1997 Porsche 993 3.8 RSR (from October 29, 2020)