Porsche has unveiled an updated version of its 911 GT3 RSR racecar, which will participate in next year�s GT Championship. The German firm's engineers modified the exhaust system and air intake housing, with the 4.0-liter boxer powerplant delivering 5 more horsepower, for a total of 455 hp at 7,800 rpm. While the power increase isn't much of an improvement, Porsche claims that the six-cylinder unit is better adapted to different fuel grades and its driveability is superior compared to the outgoing model.
The car also comes with a modified bodykit with a new front lip providing higher downforce, while the rear wing�s position has changed. In addition, there are larger front wheels and new LED tail lamps, borrowed from road-legal 911s.
The base price for the 911 GT3 RSR has been set at �410,000 (US $542,430), plus VAT. All the aforementioned modifications are available as a kit for the 2010 season cars.
By Csaba Daradics
Technical description Porsche GT3 RSR (2011 model year)
Engine
Water-cooled six-cylinder boxer engine; 3,996 cc; stroke 80.4 mm; bore 102.7 mm; 455 hp (335 kW) at 7,800 rpm; max. torque 450 Nm; air restrictors 2 x 28.6 mm; max. revs 9,400 rpm; four valve technology; dry sump lubrication; individual throttle butterflies; fuel injection.
Transmission
Porsche six-speed gearbox with sequential jaw-type shift; oil/water heat exchanger, single-mass flywheel; hydraulic disengagement lever; three-plate carbon-fibre clutch; rear wheel drive; limited slip differential 45/65 percent.
Body
Monocoque body (basis GT3 RS) of hot-galvanised steel; aerodynamically optimised front end with front spoiler; aerodynamically optimised front underfloor; adjustable rear wing; 90-litre FT3 safety fuel tank with fast filling function; air jack; welded-in safety cage; race seat (driver�s side only) with flame retardant upholstery; six-point seat belt adapted for use of the HANS Head and Neck Support; electric fire extinguishing system.
Suspension
Front axle: McPherson spring strut axle; Sachs four-way gas pressure dampers; double coil springs (main and auxiliary); front axle arms adjustable for camber; adjustable sword-type anti-roll bar; power steering.
Rear: Multi-arm axle with rigidly mounted axle sub-frame; Sachs four-way gas pressure dampers; double coil springs (main and auxiliary); rear axle tie-bar reinforced and infinitely adjustable; adjustable sword-type anti-roll bar. Complete suspension infinitely adjustable (height, camber, track).
Brake system
Brake system with balance bar control.
Front: Single-piece six-piston aluminium fixed callipers; inner vented, 380 mm diameter; racing brake pads.
Rear: Single-piece four-piston aluminium fixed callipers; inner vented, 355 mm diameter; racing brake pads.
Wheels
Front: Three-piece BBS light-alloy wheels (12J x 18 ET 34); central bolt.
Rear: Three-piece BBS light-alloy wheels (13J x 18 ET 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, 80 Ah, 140 Ah alternator.
Weight
1,220 kg
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