Dr. Ing. h. c. F. Porsche AG, Stuttgart, adds another member of the 911 family to its range of products. The new GT3 Cup S, based on the road-going GT3 RS sportscar, is created exclusively for racing purposes. The Weissach-developed and built vehicle will race in international championships which run in accordance with FIA GT3 regulations.
To a large extent, the 3.6-litre boxer engine is identical to the power unit used in the Porsche Mobil1 Supercup and the international Carrera Cup championships. Power output has in-creased by 20 horsepower to now 440 hp (324 kW) at 8,000 rpm. Maximum torque is up by ten Nm to 430 at 7,250 revs per minute. The power increase results from optimised engine electronics and a modified exhaust system.
In contrast to the GT3 Cup, the body of the Cup S is not based on the road-going GT3 but on the GT3 RS. In the wider wheel arches, considerably larger wheels can now be mounted. At the front, the rims measure 10.5 inches in width with 12 inch wheels fitted at the rear. The front section and flares are significantly different to the GT3 Cup components. An adjustable front-splitter generates more downforce at the front axle. The rear-wing is wider and positioned higher than the Cup version and provides more downforce at the rear axle.
Several suspension components for the GT3 Cup S have been taken from the more powerful GT3 RSR which races in the GT2 class at international long-distance championships. The braking system of the GT3 Cup S was adjusted to the increased power compared to the GT3 Cup. At the rear the diameter of the brake discs has grown by five millimetres to now measure 355mm.
The new GT3 Cup S costs 250,000 Euro national VAT and is scheduled for delivery to customer teams from April. Additionally, Porsche offers a kit to upgrade the 2007 Cup models to the GT3 Cup S standard.
Technical Specifications Porsche GT3 Cup S
Water-cooled six-cylinder boxer; 3,598 cc; stroke 76.4 mm; bore 99.98 mm; max output 440 bhp (324 kW); max torque 430 Nm; max engine speed 8,400 rpm; four-valve technology; dry sump lubrication; two-stage resonance intake distributor; central air intake; electronic MS 3.1 engine management; fuel injection (multi-point, sequential); fuel grade 98 RON premium unleaded.
Six-speed gearbox with sequential jaw-type shift; compressed oil lubrication; oil/water heat exchanger; single-mass flywheel; hydraulic disengagement lever; 5.5-inch three-plate carbon-fibre clutch; limited-slip differential 40/60 %; rear-wheel drive.
Monocoque body made of hot-galvanised steel; aerodynamically optimised front end with front spoiler; doors with side frames made of CFP and plastic wing mirrors; aerodynamically optimised front underfloor; adjustable rear wing; 100-litre safety fuel tank; 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.
Front: McPherson spring strut axle; Sachs gas pressure dampers; double coil springs (main and ancillary spring); 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 gas pressure dampers; double coil springs (main and ancillary spring); rear axle track arm adjustable for camber; 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 in diameter; racing brake pads.
Rear: Single-piece four-piston aluminium fixed callipers; inner-vented, 355 mm in diameter; racing brake pads.
Front: Three-piece BBS light-alloy wheels (10.5J x 18); central locking;
Rear: Three-piece BBS light-alloy wheels (12J x 18); central locking;
Motec display with integrated data recording; battery: 12 volt, 50 Ah, 140 Ah alternator.
Approx 1,170 kg