[PTA SC] Porsche 936

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For the 1976 season, the FIA devided sportscar racing in six classes; Group 1 through 6, with Group 6 being the full-bore prototype racers. Porsche had been the dominant force in what was now known as the Group 4 class, but a new car was needed to continue the success. To be eligible for Group 4 at least 400 road cars had to be built within 2 years and the dimensions of the racing version could not be different from the road car it was derived from. Very few modifcations compared to the road car were allowed, except for those to increase safety like the installation of a fuel cell and a roll cage. To even the competion, displacement was tied to a minimum weight, from 495 kg with less than 500cc to 1270 kg for over 6000cc.

Porsche's entry in GT-racing in the first half of the 1970 consisted of the 911 RS and RSR models. These were powered by naturally aspirated engines of up to 3 litres. However, these models were unlikely to be homologated, because of their limited production numbers, so a new car was needed. In 1975 the new 930 (911 Turbo) model was launched and this would form the base for the new Group 4 racer, aptly named 936. The displacement of turbocharged engines are multiplied by 1.4 to get the normally aspirated equivalent displacement, this mean that the 3 litre turbo engine placed the new Group 4 car in the 4000 - 4500 cc class. When Porsche designed the 930, the competition version was already anticipated and many components like the clutch and gearbox were made much stronger than needed for the 260 bhp 930, an ingenious way to evade the non-modification rule.

To comply with the regulations, the 936 would have to weigh at least 1120kg. This was easily achieved by removing most of the interior and weight was brought down to 1090kg even with the electric windows still in place. In race trim it was balasted to 1120 kg. Major modifications to the engine were not allowed, but due to the nature of turbocharged engines, a higher output is fairly easily achieved. In Group 4 trim the 3 litre engine was good for a tarmac blistering 480 bhp and equipped with larger valves in 1977 over 550 bhp was reached.

In competition, the 936 picked up where the 911 RSR had left off, by winning the European GT championship in the hands of Toine Hezemans and on the other side of the Atlantic Ocean, George Follmer was TransAm champion with a 936. Although Porsche's interests wandered from Group 4 racing to Group 5 racing where the 935 was decimating the competion, the 936 kept on winning in the last years of the 1970s. Most notable are the three successive class victories at LeMans from 1977 to 1979.

Pictured is a Valiant livered 936, it seen here on the Spa Franchorchamps track where it took part in the Group C revival race which was part of the 2003 RMU Classic weekend. WM

Chat on

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Op dinsdag 4 april 2006 23:02 schreef Hugster het volgende:
nee ik leer e-commerce en computerscience, geen werkwoorden

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Op dinsdag 4 april 2006 23:07 schreef hermandeperman het volgende:

[..]

Het nummer had 11 hoger moeten zijn

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Op dinsdag 4 april 2006 23:10 schreef hermandeperman het volgende:

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't was een gokje

Die Johnny Walker is ook niet meer wat het geweest is