new 997.2 GT3 RSR
 

The new 997.2 GT3RSR has wider (12inch) front tires, supposedly to give more front bite and less understeer. I should think that would only be a result of greater load on the front tires, since the tires on the 2010 car were already lightly stressed. The wider ones need more load to get up to operating temperature and optimal grip. That must either come from a more forward weight (ballast?) bias or possibly the new deeper front splitter is adding enough extra downforce on the front.

Kilometer Magazine: 2011 Porsche 911 GT3 RSR Race Car Debuts

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Porsche 911 GT3 RSR

Debut for the 2011 version of the world’s most successful GT race car

Stuttgart. The Porsche 911 GT3 RSR takes off into the new motorsport season with extensive modifications. The 2011 version of the world’s most successful GT race car celebrated its international premiere at the “Night of Champions” party held at the R&D Centre in Weissach to mark the end of the motorsport season. Priority in the further development of the GT3 RSR was given to the newly designed aerodynamics at the front and rear, changes to the suspension kinematics and to the engine.

The 4.0-litre, six-cylinder boxer engine now delivers 455 hp (355 kW) at 7,800 revs, five horsepower more than its predecessor. The power increase results from an engine management system which adapts even better to different fuel grades, as well as a redesigned exhaust system and a modified air intake housing. Moreover, the driveability of the famously efficient engine has undergone further improvements. Maximum revs remain unchanged at 9,400 rpm.

Clearly visible are the modifications to the front. A new front lip provides higher downforce at the front axle. The front wheels are now wider with the rims growing from 11 to 12 inches giving additional grip and less of an understeering tendency. The position of the rear wing and the shape of the wing mounting also underwent optimisation and were adapted to the new rear fairing with additional air outlet louvers. The rear lid was also redesigned for optimised air ducting. Like the 911 GT3 Cup and the GT3 R, the RSR has now been equipped with the LED rear lights taken from the latest 911 road-legal cars.

The 911 GT3 RSR joins the 911 GT3 R and the 911 GT3 Cup as the top model of Porsche Motorsport’s product range. The successful long distance racer from Weissach can be ordered now at a price of 410,000 Euro plus country-specific value added tax. All 2011 modifications are available as a kit for GT3 RSR cars from the 2010 season.

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

From Porsche AG


Best,
Grady

love the 934-esque wheel arches and front spoiler.