Porsche 962

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One of a trio of factory-run 962Cs which raced at the 1988 24 Hours of Le Mans.

The Porsche 962 (also known as the 962C in its Group C form) was a sports-prototype racing car built by Porsche as a replacement for the 956 and designed to mainly to comply with IMSA's GTP regulations, although it would later compete in the European Group C formula as the 956 had. The 962 was introduced at the end of 1984, from which it quickly became successful through privateer owners while having a remarkably long-lived career, with some examples still proving competitive into the mid-1990s.

[edit] Development

The front end of an RLR-Porsche 962C GTi chassis.

The rear diffuser of an IMSA-spec 962. The exhaust pipe and rear suspension are within the Venturi tunnels, while the gearbox and airjacks are in the center shroud.

An early 962 cockpit.

When the Porsche 956 was developed in late 1981, the intention of Porsche was to run the car in both the World Sportscar Championship and the North American IMSA GTP Championship. However IMSA GTP regulations differed from Group C and subsequently the 956 was banned in the US series on safety grounds as the driver's feet were ahead of the front axle center line.

To make the 956 eligible under the IMSA regulations, Porsche extended the 956's wheelbase to make room for the pedal box. A steel roll cage was also integrated into the new aluminium chassis. For an engine, the Porsche 934-derived Type-935 2.8L flat-6 was used with air cooling and a single Kühnle, Kopp und Kausch AG K36 turbocharger instead of the twin K27 turbochargers of the Group C 956, as twin-turbo systems were not allowed in IMSA's GTP class at the time.

The newer Andial built 3.2L fuel injected Flat-6 would be placed in the 962 by the middle of 1985 for IMSA GT, which made the car more competitive against Jaguar. However it would not be until 1986 that the 2.6L unit from the 956 was replaced in the World Sportscar Championship, using 2.8L, 3.0L, and 3.2L variants with dual turbochargers. The cars run under World Sportscar Championship regulations were designated as 962C to separate them from their IMSA GTP counterparts.. The 3.2L unit, which had been eligible under IMSA's Group 3 engine rules was banned in IMSA by 1987^[1] In 1988, to counteract against the factory Nissans and the threat of withdrawal from Porsche teams, watercooled twin turbo Porsche engines would be allowed back but with 36 mm restrictors.^[1]

In total, Porsche would produce 91 962s between 1984 and 1991. 16 were officially used by the factory team, while 75 were sold to customers. Some 956s were rebuilt as 962s, with two being previously written off and four others simply rebuilt. Three 962s that were badly damaged were also rebuilt had been given a new chassis number due to the extensive reconstruction.^[2][3] Due to the high demand for 962 parts, some aluminium chassis were built by Fabcar in the United States before being shipped to Germany for completion.

[edit] Modifications

Due to the sheer numbers of 962s, some teams took it upon themselves to adapt the car to better suit their needs or to remain more competitive against the competition. These modifications included new bodywork for better aerodynamic efficiency, while others changed mechanical elements. Long-time Porsche campaigner Joest Racing heavily modified a pair of 962s for the IMSA GTP Championship in 1993 to better compete against Jaguar, taking the 962s final sprint race victory (Road America) that season.

[edit] Privately-built 962s

A Kremer 962CK6.

Beyond even modification, some teams took it upon themselves to reengineer the entire car. One of the notable problems of the 962 was the lack of stiffness in the aluminium chassis, which meant that some teams took it upon themselves to design new chassis, and then buy components from Porsche to complete the car, although some also had unique bodywork as well. Some teams would then offer their 962s to other customer teams.

Among the most popular privately-built 962s was that from Kremer Racing, termed the 962CK6. 11 total were built, campaigned by Kremer and other teams. John Thompson designed a chassis for Brun Motorsport, eight of which were built and helped the team take second in the World Sportscar Championship in 1987. Thompson would later build two chassis for Obermaier Racing. Richard Lloyd Racing's GTI Engineering would turn to Peter Stevens and Nigel Stroud to develop four 962C GTis, which featured entirely revised aero. Former factory Porsche driver Vern Schuppan would also build five new chassis, some known as TS962s.

A Richard Lloyd 962C GTi.

In the United States, the ball got rolling when Holbert Racing began making modifications to their own chassis and rebadging them with "962 HR-" serial numbers. The search was always on for a stiffer and safer 962 monocoque and Jim Busby contracted Jim Chapman to build a more robust version of the 962 monocoque. Fabcar would become the defacto factory tub supplier, supplying chassis with official Porsche serial numbers. Fabcar incorporated changes to the factory tub replacing the simple sheet aluminum construction with sheet ali and aluminum honeycomb in addition to billet aluminum bulkheads, all of which substantially increased the tub's crashworthiness as well as stiffness. Dyson Racing purchased a Richard Lloyd Racing/GTi Engineering 962 monocoque for use in their Porsche 962 DR-1 chassis. A Fabcar tub was used in Dyson's Porsche 962 DR-2.

Some 962s were even more extensively modified, with several open-cockpit versions being developed in the mid-1990s to run under new sportscar regulations. Kevin Jeanette built the Gunnar 966, mimicking elements from the 917/30 Can-Am cars. Meanwhile, Kremer Racing would once again develop their own chassis, with the open-cockpit CK7 running in Interserie and K8 running at Le Mans. These cars shared little with the original 962s, using custom bodywork and chassis designs, yet retaining the engine and some suspension elements.

[edit] Racing history

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Michael and Mario Andretti's 1989 Miller High Life 962

Al Holbert's Löwenbräu 962.

Porsche debuted the 962 at the 24 Hours of Daytona with Mario and Michael Andretti driving the factory car which led the race until it retired during lap 127 with engine and gearbox problems.

For 1985, the 962C would debut in the World Sportscar Championship, but ironically the car lost to an older 956, which had already taken WEC top-honors four times. Under pressure from new cars from Jaguar and Mercedes-Benz, in 1987 Porsche again brought in a new engine, a more durable and powerful 3.0 L unit which powered the car to an overall win at the 1987 24 Hours of Le Mans, Porsche's record seventh consecutive victory at the race.

After a post-'87 "dry spell", Porsche customer Jochen Dauer got the 962 re-classified as a road legal GT1 car under a loophole in the new ACO regulations for the 1994 24 Hours of Le Mans.

[edit] Achievements

Two of the three 962C cars entered for the 1988 24 Hours of Le Mans race.

During the early years of the career of the 962, the car was one of the most dominant cars in motorsport. The championships won by teams campaigning the 962 included the World Sportscar Championship title in 1985 and 1986, the IMSA GT Championship every year from 1985 to 1988, the Interserie championship from 1987 until 1992, all four years of the Supercup series (1986 to 1989), and the All Japan Sports Prototype Championship from 1985 until 1989. The 962 also won the 24 Hours of Le Mans in 1986 and 1987 as well as later winning under the Dauer 962 badge in 1994.

The presence of strong factory teams, such as Jaguar, Mercedes-Benz, Nissan, and Toyota, competing against privateer 962s eventually led to the car becoming less successful in the later 1980s. Even though they struggled, 962s would continue to win races into 1993, taking lone victories in the IMSA GT and Interserie seasons. Although Dauer's Le Mans victory in 1994 featured a highly modified car, Team Taisan would take the final victory ever in an original 962C, winning a All Japan Grand Touring Car Championship event at Fuji Speedway in August of that year, just over ten years after the car had first debuted.

[edit] Road versions

Towards the end of the car's competition life, a number of privateer teams and tuners began converting 962s for road use. The concept was that the 962, which had performed so well on the track, would be ideally suited as a supercar for the road.

The first to modify a 962 into a road car was Koenig, a German tuner who had previously raced 962s. Known as the C62, the car was completed in 1991 and featured entirely new bodywork in order to better adapt to German regulations. The engine was expanded to 3.4L and saw the addition of a newer Motronic system. It is unknown how many were built by Koenig.

German tuner DP Motorsports completed the second road conversion in 1992, with a total of three cars, known as DP62, built upon existing 962 racing chassis. Modifications included moving the headlights higher to meet German legal requirements, plus the addition of a 3.3L twin-turbo Flat-6.

A Schuppan 962CR road car on display.

In 1994, two former 962 campaigners also decided to create road cars. Vern Schuppan created his Schuppan 962CR for Japanese customers, although the car actually shared very little with the 962. The bodywork and chassis were completely new and unique, but the engine was taken directly from 962s, although it was also expanded to 3.3 litres. An unknown amount were built before funding failed to materialize. A further 962LM was built which retained the original 962 body, yet was slightly adapted to allow for more comfort while driving.

Jochen Dauer on the other hand retained much from the 962 for his Dauer 962 Le Mans, using original racing chassis. The bodywork was all new, yet retained many elements from the original 962s. However, unlike the previous road cars, Dauer took the 962 Le Mans racing once again. With the assistance of Porsche and using a loophole in the rules for the 24 Hours of Le Mans, Dauer was successfully able to race his modified 962s and win the race overall.

[edit] References

[edit] External links

Wikimedia Commons has media related to:

Porsche 962

• Porsche USA - 1984 Porsche 962
• 962.com - History of the Porsche 956 and 962
• World Sports Racing Prototypes - Porsche 962 chassis index
• Mulsanne's Corner - Dyson Racing's modified 962 DR2
• Mulsanne's Corner - Joest Racing's modified 962