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New Porsche 911 GT3 RSR Offers More Engine Capacity And Improved Aerodynamics

New model comes with extensive modifications

Jan 23, 2009
Epcp_0901_01_z+Porsche_911_GT3_RSR+rear_view Photo 1/4   |   New Porsche 911 GT3 RSR Offers More Engine Capacity And Improved Aerodynamics

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 Nurburgring 24 Hours, competes in the GT2 class in international long distance races. The most distinguishing feature of the new GT3 RSR is the re-designed nose with its large air outlets on the front panel. Furthermore, major changes were made to this quickest 911 beneath its light-weight bodyshell.

Noticeable at first sight are the air outlet slots, the so-called louvres, on the nose panel which otherwise would cover the luggage area on the road car. This is an indication of the completely re-designed air ducting for 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 beneath the rear of the car also underwent further optimization. Up above, the rear wing now features a wider adjustment range. And the weight-optimized braking system and the lighter wiring harness contribute to further improved handling, compared to the prior model.

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The capacity of the well-known six-cylinder horizontally opposed 'boxer' engine has been increased from 3.8 to 4.0-litres. After another reduction in the size of the air restrictors for the 2009 season (as mandated by governing body of world motor sport), the engine now delivers around 450 hp (331 kW) at 7,800 rpm, 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 its forerunner, the rev level for a given power output has been significantly lowered. Thanks to this, the engine features an optimized torque curve, which results in better drivability.

In the cockpit, a new multi-function display located above the dashboard indicates the optimum time to change gears. Another new feature is the programmable multi-function, on-board 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 recognize race cars when they enter the pits at night-time in long distance endurance events. For easier servicing under race conditions, other modifications were made. The GT3 RSR now features a new air-jack system with over-pressure valve. The oil re-fill with fast filling function has now moved to the rear lid, giving mechanics better access.

Epcp_0901_03_z+Porsche_911_GT3_RSR+steering_wheel Photo 3/4   |   New Porsche 911 GT3 RSR Offers More Engine Capacity And Improved Aerodynamics

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.

Epcp_0901_04_z+Porsche_911_GT3_RSR+front_view Photo 4/4   |   New Porsche 911 GT3 RSR Offers More Engine Capacity And Improved Aerodynamics

Engine: 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: 102.7 mm

Stroke: 80.4 mm

Capacity: 3,996 cc

Power output: 331 kW (450 hp) at 7,800 rpm

?Max. Torque: 430 Nm at 7,250 rpm

?Max. revs: 9,400 rpm

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

Body: Monocoque body (basis GT3 RS) of hot-galvanized steel; aerodynamically optimized front end with front spoiler; aerodynamically optimized front underfloor; adjustable rear wing; 90-litre safety fuel tank with fast filling function; air jack; welded-in safety cage; bucket-type racing seat (on driver's side only) with flame-resistant seat cover; six-point seat belt adapted for use of the HANS Head and Neck Support; electric fire-extinguishing system.

Suspension: Front: 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: 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).

Brakes: Brake system with balance bar control.?Front: Single-piece six-piston aluminum fixed calipers; inner-vented, 380 mm in diameter; racing brake pads.?Rear: Single-piece four-piston aluminum fixed calipers; inner-vented, 355 mm in diameter; racing brake pads.

Wheels: Front: Three-piece BBS light-alloy wheels (11J x 18-34); central bolt;?Rear: Three-piece BBS light-alloy wheels (13J x 18-12.5); central bolt.

Electrical System: Motec display with integrated data recording; multi-function display with integrated gearshift indicator; adjustable traction control; battery: 12 volt, 50 Ah, 140 Ah alternator.

Weight: Approx. 1,220 kg complying with A.C.O. regulations,1,245 kg complying with FIA regulations.

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