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2008 GT3 RSR specfications

Concept

Porsche 911 GT3 RSR
single-seated GT race vehicle.
in accordance with the current A.C.O. LMGT2 Regulations and the FIA Article 257 (Technical Regulations for Series Grand Touring Cars).
basis: Porsche 911 GT3 RS (997; street legal version), homologated from January 2007 onwards.

Engine

Six-cylinder aluminium boxer engine, water-cooled
3,795 cc; stroke 76.4 mm (3.01"); bore 102.7 mm (4.05")
max. output: 342 kW (465 bhp) at 8000 rpm
max. torque 430 Nm (317 lb-ft) at 7250 rpm
air restrictors 2 x 29.5 mm
max. rpm: 9,400 rpm
four valves per cylinder
dry sump lubrication
individual throttle butterflies
central air intake
electronic BOSCH MS 4.0 engine management
fuel injection
required fuel quality: 98 octane RON Super Plus unleaded

Power Train

Six-speed gearbox with sequential jaw-type shift
oil/water heat exchanger
single-mass flywheel
hydraulic disengagement lever
three-plate carbon-fibre clutch
limited-slip differential 45/65 %
rear-wheel drive

Bodywork

Monocoque body (basis 997 GT3 RS) of hot-galvanised steel (add-on parts made from carbon/kevlar fiber).
aerodynamically optimised front end with front spoiler.
welded-in roll cage.
bucket-type racing seat (driver side only) with flame-resistant seat cover.
six-point seat belt, prepared for using HANS Safety System (Head And Neck Support System).
three-point air jack system.
aerodynamically optimised front underfloor.
flat underbody made from carbon fiber.
adjustable rear wing.
removable steering wheel (quick-connect coupling).
fire extinguishing system.
90 litre FT3 safety fuel tank with quick refuelling system.

Vehicle Weight

approx. 1,225 kg complying with A.C.O. regulations
approx. 1,200 kg complying with FIA regulations

Suspension

McPherson spring strut axle.
Sachs four-way gas pressure dampers.
double coil springs (main and ancillary spring).
front axle arms adjustable for camber.
adjustable sword-type anti-roll bar on both sides.
power steering Multi-arm axle with rigidly mounted axle sub-frame.
Sachs four-way gas pressure dampers.
double coil springs (main and auxiliary spring).
rear axle tie-bar reinforced and infinitely adjustable.
adjustable sword-type anti-roll bar on both sides.
Complete suspension infinitely adjustable (height, camber, track).

Rims/Tires

Front axle: Three-piece BBS light-alloy wheels (11J x 18-34) with central locking, Michelin race tires 27/65 - 18

Rear axle: Three-piece BBS light-alloy wheels (12J x 18) with central locking, Michelin race tires 31/71 - 18

Brake System

without ABS, dual master cylinders, brake force balance adjustable by bias bar system.
six-piston fixed brake callipers in the front;
weight-optimized internally vented brake discs; 380 mm diameter.
four-piston fixed brake callipers in the rear;
weight-optimized internally vented brake discs; 355 mm diameter.

Electrics

Bosch MS 4.0 engine management Motec display with integrated data recording.
adjustable traction control.
battery: 12 volt, 50 Ah.
140 Ah alternator.

Background

The Porsche 911 GT3 RSR (Type 997) is in compliance with the current Le Mans GT2 regulations of the Automobile Club de l’Ouest (A. C. O.) as well as the regulations of the international automobile assembly FIA for Series Grand Touring Cars, thus enabling the participation in various racing series.

The Porsche GT3 RSR launches into the new model year with extensive modifications. The most powerful race car based on the Porsche 911, which last year scored wins at the 24 hour races of Le Mans and Spa as well as overall victory at the Nuerburgring 24 hours, competes in the GT2 class at international long distance races. The most distinguishing feature of the new GT3 RSR is the front end which received major improvements to the aerodynamics. The majority of innovations however are hidden under the weight-optimised body.

Aside from the easily recognisable additional spoilers on the front apron, so-called flicks, an optimised air ducting with newly-designed side air outlets generates more downforce and reduces drag. The rear end including the rear wing was taken over from the predecessor. Extensive changes to the suspension cinematics increase mechanical grip considerably. The range of possible suspension set-ups was broadened.

The 3.8-litre boxer engine of the GT3 RSR remains unchanged apart from slight improvements to details. It delivers 465 hp (342 kW) at 8,000 revs per minute and delivers a maximum torque of 430 Nm at 7,250 revs. The rev limiter of the efficient six-cylinder kicks in at 9,400 rpm.

Much of the know-how in the GT3 RSR’s totally new gearbox has come from the RS Spyder sports prototype. The sequential six-speed unit, developed by Porsche engineers, is considerably lighter than its predecessor. Internal friction was substantially reduced. The flat angle of the drive shafts allows teams a wider range of suspension set-ups.

Additionally, the RSR convinces through re-designed, service- and driver-friendly electronics. Performance and reliability remain the outstanding characteristics of the 911 GT3 RSR.

The vehicle can not be approved for road use. Each customer is solely responsible for observing the regulations relevant to himself and his car.

Notable Victories

Winner American Le Mans Series (GT2 class)
1st place Sebring 12 Hours (GT2)
1st place Nurburgring 24 Hours (overall win)
1st place Dubai 24 Hours (overall win)