Dodge Viper GTS-R

In the early 1990s, initial attempts to modify first-generation Dodge Viper RT/10s for GT racing proved unsuccessful due to the car’s lack of adaptation for racing and limited funding. A key deficiency was the Viper’s roadster configuration, lacking the rigidity of a coupe. Following the sales success of the first-generation Viper, Dodge began redesigning the car in 1995, upgrading the roadster and simultaneously introducing a new coupe, the Viper GTS. Dodge aimed to showcase the new car's handling capabilities and improve importation success in Europe. Chrysler approved a racing program centered on the Viper GTS, allowing for mutual improvement between the racing and road versions.

Recognizing the need for external expertise to adapt the car for both North American and European circuits, Chrysler partnered with Oreca, a French racing and engineering firm with experience in sports car racing, including the 1991 24 Hours of Le Mans win with the Mazda 787B. Oreca would construct and maintain the racing cars, as well as run Chrysler's official factory teams in Europe. Canaska / Southwind Team was recruited for the North American factory effort. British engineering firm Reynard Motorsport was contracted to construct the car’s basic chassis and integral parts, which were then shipped to Oreca for assembly.

The Viper’s 7998.5 cc V10 engine was well-suited for competition due to the 8000 cc limit. Modifications to the 356-T6 V10 engine focused on redesigned intakes for increased horsepower and reinforcements for endurance. Much of the bodywork from the Viper GTS road car was retained, with the addition of mandatory aerodynamic elements such as a rear wing, rear diffuser, and front splitter. Initial cars had their fog lights covered before being reinstated for improved nighttime visibility, with optional lights able to be placed in square notches above the grill. The exhaust was routed out the side of the car, under the doors, between the front and rear wheel wells – a feature previously found on the first-generation RT/10. Vents were added to the hood for engine cooling, and intakes were placed on the roof and rear fenders.

In total, 57 Viper GTS-Rs were built. After the production of five prototypes for testing, 52 additional cars were constructed. Oreca built a total of 18 chassis. The remaining 39 chassis were built by Reynard and other parties. Oreca sold most of the chassis directly to customers, while some were used by the factory teams. Oreca continued to build and support the Viper GTS-R fleet until 2005.

The Chrysler Viper GTS-R debuted in 1996 with two teams independently developing the coupe for competition. Canaska Southwind entered the IMSA GT Championship GTS-1 class at the 1996 24 Hours of Daytona, finishing 29th, and improved to twelfth at the 12 Hours of Sebring). Viper Team Oreca also began a limited schedule, including the 24 Hours of Le Mans.

At Le Mans, both teams entered two cars each, with three finishing; Canaska Southwind achieving the best result in tenth place. Afterwards, Viper Team Oreca competed in the BPR Global GT Series, earning eighth at Brands Hatch, ninth at Spa, and sixth at Nogaro. Canaska Southwind finished second in class at Mosport and sixth overall.

Canaska Southwind ended their involvement in 1997, leaving Oreca to enter a lone car in the Rolex 24 at Daytona, finishing 12th. Oreca then focused on the new FIA GT Championship, switching to the GT2 class due to strong competition in GT1, and was joined by Chamberlain Engineering. Oreca achieved a 1-2 finish in the opening race and ultimately won six more races in the eleven-race season, claiming the GT2 championship. At Le Mans, Oreca finished 14th overall, fifth in class. Team Taisan entered a Viper in the All Japan Grand Touring Car Championship, achieving an eighth-place finish.

Oreca dominated FIA GT in 1998, winning all but one event and securing their first class victory at Le Mans with an eleventh-place overall finish. Chamberlain Engineering competed as a privateer, earning points and finishing 14th at Daytona. Orion Motorsport won six class races in the British GT Championship, earning Kurt Luby and Richard Dean the drivers’ championship.

In 1999, Oreca expanded to two championships: FIA GT and the American Le Mans Series (ALMS). Oreca swept the FIA GT season with nine wins, while Paul Belmondo won a single race. Chamberlain improved to second in the championship, and GLPK Carsport also competed. In ALMS, Oreca won six races and the championship. Oreca also won their second straight Le Mans class victory, with various Vipers finishing in the top six. Belmondo's Vipers won two races in the FFSA GT Championship, and Zakspeed won the 24 Hours Nürburgring.

Oreca concentrated on North America in 2000, winning the 24 Hours of Daytona by a narrow margin over the Chevrolet Corvette factory team. They won ten races in the ALMS, ultimately losing the championship to Corvette in the final rounds but still securing the title. Oreca also outperformed Corvette at Le Mans, winning their third straight class victory with a seventh-place finish. In FIA GT, Paul Belmondo and Carsport Holland won a collective four races, but were unable to overcome the Lister Storm team. DDO, ART, and MMI squads combined for eight Viper victories in French GT.

Chrysler officially ended factory backing in 2001, with Oreca shifting focus to developing a Le Mans Prototype. American Viperacing competed in ALMS, scoring no victories and finishing third in the championship. FIA GT saw a blossoming of teams, with Larbre Compétition winning three events (including the Spa 24 Hours) and the championship. Carsport Holland won two races and finished second. Hayles Racing won four races in British GT, while DDO won five French GT events, and Zakspeed won the 24 Hours Nürburgring for the second time.

Larbre defended their FIA GT championship in 2002, winning only one race. Carsport Holland and Paul Belmondo also managed single victories. DDO won four races in French GT, and Zakspeed won their third Nürburgring race.

In 2003, the Prodrive-built Ferraris began to dominate. Vipers were unable to win any races in FIA GT, with Larbre finishing seventh in the championship. Larbre won six races in French GT, and Team Taisan earned its first class victory in JGTC. Vipers also competed successfully in Italian GT.

The Viper GTS-Rs were phased out in 2004, with Zwaan's Racing entering the full FIA GT season, finishing ninth in the championship. Vipers remained dominant in FFSA GT and Italian GT. In 2005, a single entry at the Spa 24 Hours was the only FIA GT appearance, finishing 12th, while Italian GT saw limited competition. French GT saw Alain Prost drive a Viper GTS-R chassis as part of his 50th birthday, winning one race as part of the Vipers nine victories that season.

Following Dodge's official end of their factory-backed racing program in 2001, as well as the redesigning of the Viper in 2003, the first generation GTS-Rs were retired. Dodge persevered in motorsports competition by backing a different type of racing endeavor. Unlike before, there would be no factory team. These racing vehicles, known as Dodge Viper Competition Coupes, complied with FIA GT3 regulations, which meant a reduction in performance compared to the earlier Viper GTS-Rs. In 2012, with the release of the fifth-generation Viper road car, Chrysler returned to motorsports with the SRT Viper GTS-R in the American Le Mans Series, later followed by the Dodge Viper SRT GT3-R.