|Brakes (Front)||Single-piece six-piston aluminium fixed callipers; inner-vented, 380 mm in diameter; racing brake pads.|
|Brakes (Rear)||Rear: Single-piece four-piston aluminium fixed callipers; inner-vented, 355 mm in diameter; racing brake pads.|
|Wheels (F)||Three-piece BBS light-alloy wheels (11J x 18-34); central bolt;|
|Wheels (R)||Three-piece BBS light-alloy wheels (13J x 18-12.5); central bolt.|
|Front 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.|
|Rear Suspension||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.|
|Layout||Rear Engine, RWD|
|Transmission||Six-speed gearbox with sequential jaw-type shift; oil/water heat exchanger; single-mass flywheel; hydraulic disengagement lever; three-plate carbon-fibre clutch|
|Differential||Limited-slip differential 45/65%|
|Type:||Water-cooled, six-cylinder boxer engine; four valves per cylinder; dry sump lubrication; individual throttle butterflies; fuel injection; air restrictors 2 x 29.5 mm.|
|Bore X Stroke||102.7 mm X 80.44 mm|
|Horsepower||331 kW (450 bhp) @ 7,800 rpm|
|Torque||430 Nm (317 lb-ft.) @ 7,250 rpm|
|Body Type||Single-Seat Endurance Race Car|
|Curb Weight||1,220 kg (2690 lbs.)|
|Materials||Monocoque body (basis GT3 RS) of hot-galvanised steel; aerodynamically optimised front end with front spoiler; aerodynamically optimised front underfloor; adjustable rear wing|
Porsche has just announced the track-only halo version of the 2009 911, the Porsche 911 GT3 RSR. Name notwithstanding, the GT3 RSR is actually a GT2-class racer built and designed to compete in Le Mans-class endurance races worldwide, and other road course events.
Power comes from a bored out version of Porsche's tried-and-true 3.8 liter naturally aspirated boxer 6, now displacing 4.0 liters in 911 GT3 RSR trim and pushing out 450 horsepower to the rear wheels. Porsche presumably went with the GT3 RSR moniker to avoid confusion with existing 911 GT2 models, which feature forced induction based off the 911 Turbo.
Professional teams and very wealthy would-be track stars also get new front and rear aerodynamics, highlighted by a function-over-form rear wing adjustable to miniscule changes in track and weather conditions. The redesigned 911 GT3 RSR hood with functional louvers actually feeds air in and out of the beefy radiators necessary to both cool the motor at load and facilitate the optional air conditioning.
An endurance racing-spec 23.8 gallon safety tank sure would be handy for taking 2009 911 GT3 RSR on cross-country trips, but don't even think about it. While not street legal, the Porsche 911 GT3 RSR will be available to private teams for the 2009 season at a base price of €380,000, or roughly $500k USD.
More engine capacity and improved aerodynamics
Official Porsche Press Release
Stuttgart. The successful Porsche 911 GT3 RSR takes off into the new model year with extensive modifications. The most powerful race car based on the Porsche 911, which last season secured wins in the American Le Mans Series and at the Nürburgring 24 Hours, competes in the GT2 class at international long distance races. The most distinguishing feature of the new GT3 RSR is the redesigned front with large air outlets on the front hood. Under the light-weight bodyshell, as well, major changes were made to the quickest 911.
Noticeable at first sight are the air outlet slots, or the so-called louvers, on the front hood: an indication of the completely redesigned air ducting of the radiators, which became necessary through the new design of supply and discharge air with the installation of an optional air-conditioning unit. The aerodynamics under the rear underwent further optimisation. The rear wing now features a wider adjustment range. The weight-optimised brake system and the lighter wiring harness contribute to further improved handling, compared to the predecessor model.
The capacity of the well-known six-cylinder boxer engine increased from 3.8 to 4.0-litres. After another reduction in the size of the air restrictors for the 2009 season, the engine now delivers around 450 hp (331 kW) at 7,800 revs per minute and develops a maximum torque of 430 Nm at 7,250 rpm. The rev limiter of the efficient six-cylinder unit kicks in at 9,000 rpm. Compared to the forerunner, the rev level for a given power output was significantly lowered. Thanks to this, the engine features an optimised torque curve and offers better driveability.
In the cockpit, a new multi-function display located above the dashboard indicates the opti-mum moment to change gears. Another new feature is the programmable multi-function, onboard supply system control device, giving teams the choice of many individual functions. One of these is the infinitely adjustable blinking frequency of the lights in the front apron, which helps to immediately recognise race cars when they enter the pits in the dark. For eas-ier servicing under race conditions, other modifications were made. The GT3 RSR now fea-tures a new air-jack system with overpressure valve. The oil refill with fast filling function has now moved to the rear lid, giving mechanics better access.
Aside from GT3 Cup and the GT3 Cup S, the GT3 RSR is the third race car based on the Porsche 911 offered by Porsche Motorsport. About 20 of the successful long distance racers have been built in Weissach and are now being delivered to customer teams around the world. The GT3 RSR costs 380,000 Euro plus VAT specific to each country.
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