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New racing sportscar enters testing phasePorsche customer motorsport: Prototype for the American Le Mans Series

Stuttgart. The development of a new prototype by Dr. Ing. h.c. F. Porsche AG, Stuttgart, for customer racing in the LMP2 (Le Mans Prototype 2) category of the 2006 American Le Mans Series, which was announced mid-April, now enters the decisive realisation phase. The first functional tests on Porsche’s test track at the Research & Development Centre in Weissach have now been successfully concluded. This marks the beginning of the testing phase for the new racing sportscar which is one-hundred percent Porsche designed and constructed, from the carbon-fibre Kevlar body to the newly-developed engine, the chassis and power-train through to the suspension.

The prototype is powered by a newly-developed 90-degree V8 endurance engine, fitted with air restrictors complying to ACO regulations, delivering around 480 hp from a 3.4-litre capacity. The lightweight power plant features a very low centre of gravity, four valves per cylinder, a dry-sump lubrication system and single cylinder throttle valves.

The six-speed sequential constant-mesh gearbox with a triple-disc carbon fibre racing clutch is a structural part of the chassis and is operated by a shift system on the steering wheel. Like the Porsche Carrera GT, the new prototype’s monocoque chassis is constructed of carbon fibre. Attached to this extremely strong yet lightweight framework is a front and rear double-wishbone suspension, with adjustable springs, anti-roll bars and four-way shock absorbers.

Providing optimum braking power for motorsport, the brake system includes twin master cylinders, adjustable brake balance and internally vented carbon brake discs measuring 380 mm at the front and 355 mm at the rear. As integral partner in the car’s development process, Michelin supplies the race tyres for the new Porsche prototype.

In compliance with the 2006 ALMS regulations, the new Porsche LMP2 weighs in at only 750 kilograms. This minimal weight was achieved through an intelligent, highly integrated lightweight vehicle concept. As the prototype is eventually intended for customer racing, the development engineers had the task of reaching the minimal weight without the extensive use of exotic and hence expensive lightweight materials.

Penske Motorsports, Inc., a wholly owned subsidiary of Penske Racing, Inc., will field the new Porsche prototype in its first full season of competition exclusively in 2006. It is anticipated they will initially debut the new Porsche prototype at the final two races of the 2005 ALMS season: the 1st of October Petit Le Mans at Road Atlanta and the 16th October season-final at Laguna Seca, as test events before entering the entire 2006 season.

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Note: Photos of the Porsche Prototype are available to accredited journalists on the Porsche Press Database at http://presse.porsche.de .

7/5/2005