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)
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.
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.
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.
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 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.
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.
Motec display with integrated data recording; multi-function display with integrated gearshift indicator; adjustable traction control; battery: 12 volt, 80 Ah, 140 Ah alternator.