This article,“ Let's make 911 a full-time 4WD '' Record of Porsche four-wheel drive evolution seen in 959]Is continued.
Such is the case. External forces were trying to significantly influence the design of future Porsche drive systems. Rosmans, a tobacco maker that supported Porsche's racing activities at the time, was eager to beat the growing popularity of the Paris-Dakar Rally in tough battles. With the attention of the press around the world, the long-distance event was a great place for sponsors to promote their products.
At the same time, victory for automakers has given the world the advantage of their all-wheel drive technology. Rossman's dream pushed Porsche's back, driving the development of the New Car, Type 953. The Type 953 is a four-drive vehicle based on the production Carrera 3.2, whereas the previous model was based on the 911SC. The 3164cc engine is equipped with a reduced compression ratio and a detuned maximum output of 225bhp to withstand poor gasoline and the burning hell of the desert.
The tested tough engine was bolted to an Audi five-stage transaxle, which was also modified to drive a front differential far beyond the casing nose. The front differential is an orthodox design, but the rear differential has been replaced by a spool. The spool is a mechanism that locks the left and right wheels at the same time and can not be called strictly a differential, but it is suitable for race cars that emphasize the light weight without the necessity of differential, widely used in Porsche endurance race cars at the time Was adopted.
In the 911, the body and suspension had an integral structure, so there was a problem before and after incorporating a 4WD drivetrain. The rear torsion bar housing was a hindrance, and the suspension itself, although the lower wishbones could be used, the use of front struts was out of the question because of the drive shaft. As a result, the front of the 953 was replaced with a short upper A arm, a newly shaped hub carrier, and two left and right dampers.
Development took place at a rapid pace in time for the Paris-Dakar in January 1984. The test was thoroughly tested on a military off-road course in Era Lessen in Germany and a similar course in southern France. After satisfactory results on the first test, many of the subsequent tests in Niger went to Le Mans hero Jackie Ickx.
Rothmans Porsche entered three cars in Paris-Dakar. The drivers and navigators were Jackie Ickx / Claude Brasseur, René Mezzi / Dominique Lemoine, Roland Kusmoul / Eric Lerner. Kusmoul, who had made a possible start, sank to 26th, but Ichs took a commendable 6th place. The winner was Mage, who had a two-hour lead over Ranger Rover's second-placed Zanirolli / Da Silva. The surroundings couldn't hide the surprise that the car, which had almost never traveled on the ground, was so easy to win.
Developing and polishing new technologies through races and rallies has yielded many achievements over the years. The disc brakes, which are now commonplace, and the Porsche PDK, a twin-clutch semi-automatic that was first used in 1986, have been perfected throughout the race. Technologies related to four-wheel drive are no exception. The core technology that the Type 953 built between 1983 and 1985 became a model for all new cars aiming for Group B later. So if anyone is going to be a big success in a very successful Group B project, it's no exaggeration to say Helmut Bot.
And the appearance of a commercial model … continues to the next time.