Porsche GT3 RSR Improvements for the ultimate racing 911

4 April 2008 · Staff

Porsche has taken its best racing 911 model and made it even better for 2008, with two of these exclusive hand-built race cars arriving to Australian customers soon.

The Porsche GT3 RSR – which last year scored GT2 class wins in the Le Mans 24 Hour and Nurburgring 24 Hour endurance races – has received aerodynamic upgrades for the new season, together with a more optimised suspension and brand new sequential gearbox which takes its ‘know-how’ from the Porsche RS Spyder racer.

The most distinguishing external feature of the new GT3 RSR is the new front end. Aside from the easily recognisable additional spoilers on the front bumper, called ‘flicks’, optimised air ducting with newly-designed side air outlets generate more downforce and reduces drag.

The rear end including the rear wing is straight from the 2007 model; however, changes to the suspension set-up now allows more adjustability and superior grip.

The normally aspirated 3.8-litre boxer engine of the GT3 RSR remains unchanged, producing a stunning 342 kW of power at 8,000 rpm and 430 Nm of torque at 7,250 rpm. The rev-limiter kicks in at 9,400 rpm.

The expertise in the GT3 RSR’s totally new gearbox is derived from Porsche’s ALMS LMP2 championship winning car of 2007, the RS Spyder. The sequential six-speed unit, developed in-house by Porsche engineers, is considerably lighter than its predecessor. Internal friction is also substantially reduced and the flat angle of the drive shafts now allows teams a wider range of suspension set-ups.

Only 35 of these aggressive racing 911s are being produced by Porsche at its motorsport headquarters in Weissach, Germany, at an ex-factory cost of approximately AUS $600,000.

Other Porsches built in Weissach for customers include the RS Spyder, 911 GT3, 911 GT3 RS ,

911 GT3 Cup Car and soon-to-be-released 911 GT2.

Technical Description Porsche GT3 RSR (2008)

Engine
Six-cylinder aluminium boxer engine, water-cooled; 3,795 cc; stroke 76.4 mm; bore 102.7 mm; four valves per cylinder; dry sump lubrication; individual throttle butterflies; central air intake; electronic MS 4.0 engine management; fuel injection; fuel grade: RON 98 Super Plus unleaded.
342 kW at 8,000 rpm;
430 Nm at 7,250 rpm;
9,400 maximum rpm;

Power transmission
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 %.

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 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 aluminium fixed calipers; inner-vented, 380 mm in diameter; racing brake pads.
Rear: Single-piece four-piston aluminium 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; adjustable traction control; battery: 12 volt, 50 Ah, 140 Ah alternator.

Weight
Approx. 1,225 kg complying with ACO. regulations, 1,200 kg complying with FIA regulations.