Porsche 911 GT3 Cup
December 2, 2007 by Admin
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There will be 265 units of the new Porsche 911 GT3 Cup which was developed in Weissach will be built on Porsche’s production line in Stuttgart-Zuffenhausen. The 911 GT3 will participate in the 2008 motorsport season such as at the Porsche Mobil1 Supercup race, Porsche Carrera Cups and GT3 Cup Challenges.
Compared to last year’s model, the most significant modification made to the new Porsche 911 is the new rear end where better heat dissipation made possible by the rear air venting slits.
The new Porsche 911 GT3 Cup is based on the the street-legal GT3 which is powered by a 3.6-liter 6-cylinder boxer engine that produces 42o bhp (20 hp more than the previous model). The engine is mated to the sequential 6-speed transmission with interruption of engine power enables the driver to shift up under full throttle without disengaging the clutch.
The Porsche 911 GT3 Cup is weighted at 1,150 kg in race trim thus its has a power-to-weight ratio of 2.7 kg per horsepower.
There will be 26 units of the Porsche 911 GT3 Cup built for the Porsche Mobil1 Supercup and they are fitted with a special exhaust system with an even more striking sound pattern reminiscent of the Formula 1 racing scene. The braking system will be upgraded to PCCB (Porsche Ceramic Composite Brakes) where PCCB reduces unsprung masses by 20 kg and sets new standards in terms of responsiveness, resistance to fading, and a long service life compared with conventional brake discs.
As for the units that entered worldwide in the Carrera Cup, they will be fitted with a modified exhaust system and steel brake discs.
Below are the features of the new Porsche 911 GT3 Cup from the press release.
Power Unit
Water-cooled six-cylinder boxer; 3,598 cc; stroke 76.4 mm (3.01″); bore 99.98 mm (3.94″); max output 420 bhp (309 kW); max torque 420 Nm (310 lb-ft); 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 plus unleaded; racing exhaust with fully controlled catalytic converter (400 cells); rear silencer with centrally mounted double tailpipe; special exhaust tailpipes for the Porsche Mobil1 Supercup.
Power Transmission
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 sintered metal clutch; limited-slip differential 40/60 %; rear-wheel drive.
Body
Monocoque body made of hot-galvanised steel; aerodynamically optimised front end with front spoiler; doors with side frames made of CFP and reinforced plastic door panels; rear lid with adjustable rear wing made of CFP; rear body panels made of CFP; air jack; welded-in rollcage; 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; 90-litre fuel tank; safety bar holding the battery in position.
Chassis and Suspension
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; reinforced front axle crossbar with six-point fastening and double clamping; power steering with electrohydraulic pressure supply.
Rear: Multi-arm axle with rigidly mounted axle subframe; Sachs gas pressure dampers; double coil springs (main and ancillary spring); rear axle track arm adjustable for camber; rear axle tiebar reinforced and infinitely adjustable; adjustable sword-type anti-roll bar.
Complete suspension infinitely adjustable (height, camber, track).
Brakes
Brake system with balance bar control.
Front: Single-piece six-piston aluminium fixed callipers; Porsche Ceramic Composite Brakes (PCCB), inner-vented, 380 mm (14.96″) in diameter; racing brake pads.
Rear: Single-piece four-piston aluminium fixed callipers; Porsche Ceramic Composite Brakes (PCCB), inner-vented, 350 mm (13.78″) in diameter; racing brake pads.
Wheels/Tyres
Front: Three-piece BBS light-alloy wheels (9J x 18); ET 43 with central locking;
Michelin rain tyres (24/64-18).
Rear: Three-piece BBS light-alloy wheels (11J x 18); ET 30 with central locking;
Michelin rain tyres (27/68-18).
Electrical System
Motec display with integrated data recording; battery: 12 volt, 50 Ah, 90 Ah alternator.
Weight
Approx 1,150 kg (1,130 kg with PCCB).
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