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Home > Porsche Mobil1 Supercup > The 911 GT3 Cup (997)

The 2005 911 GT3 Cup (Type 997) is tailor-made for customer motor sport with near-standard vehicles. The new model marks a clear step towards a thoroughbred racing car.

Equipped with a six gear sequential gearbox, changing gears under full throttle safes precious split seconds.

The 2005 911 GT3 Cup (Type 997) is the first works-prepared racing sports car to feature the Porsche Ceramic Composite Brake (PCCB), a unique development by Porsche. Contrary to its predecessor, the race car abandons ABS.

Background
The 911 GT3 Cup (997) was developed based on the current 911 generation, which has been gradually and successfully established in the market since the end of 2004. The development was focused mainly on aerodynamics, as the bow of the car clearly shows. The new bow is used in its basic shape also for the aero kit, which is available as an extra for the current 911 Carrera models.

The new 911 GT3 Cup possesses of a sequential gearbox, allowing to up-shift at full throttle without using the clutch. The gearbox already proved its performance in the 911 GT3 RSR car in international GT series.

In Porsche Michelin Supercup the race cars will be equipped with the revolutionary Porsche Ceramic Composite Brake (PCCB) as in the 2005 season, whereas the race cars used in the Carrera Cups will use a high-performance steel brake.

Power Train
six-speed sequential dog-type gearbox
gear ratios: ring & pinion gear 8/32 i = 4.0
1st gear 12/38 i = 3.16
2nd gear 15/32 i = 2.13
3rd gear 18/31 i = 1.72
4th gear 20/28 i = 1.40
5th gear 26/30 i = 1.15
6th gear 28/27 i = 0.96
pressure-oil lubrication
oil-water heat exchanger
single-mass flywheel
hydraulic clutch center-release mechanism
5.5“ triple-disc sintered-metal clutch
limited slip differential 40/60 per cent
rear-wheel drive

Brake System
brake system with adjustable bias bar
front aluminium six-piston calipers, single-piece
internally vented brake discs, 380 mm diameter, race brake pads
rear aluminium four-piston caliper, single-piece
internally vented brake discs, 350 mm diameter, race brake pads

Electric System
Motec display with integrated data recording
Battery: 12 Volt, 50 Ah
90 Ah generator

Engine
flat six-cylinder boxer engine
3,598 cc, stroke 76.4 mm, bore 100 mm diameter
max. power: 294 kW (400 hp) at 7,300 rpm
max. torque: 400 Nm at 6,500 rpm
max. rpm: 8,200 rpm
four valves per cylinder
water-cooled
dry-sump lubrication
two-stage resonance intake manifold, central inlet air duct
electronic engine management system MS 3.1
sequential multi-point fuel injection
required fuel quality: 98 octane ROZ, unleaded
race exhaust system with lambda-probe-equipped catalytic converter
twin-branch center exhaust tailpipe

Suspension
Front axle:
McPherson strut-type axle
Sachs gas pressure shock absorbers
double coil springs (main spring and helper spring)
two-piece lower control arms for camber adjustment
blade-type anti-roll bar
damper mounted to upright with twin-clamp system
power steering with electro-hydraulic pressure feed
three-piece BBS center-lock aluminium rims (9J x 18), rim offset 43
Michelin rain tires (24/64-18)

Rear axle:
multilink rear suspension with solidly mounted subframe
Sachs gas pressure shock absorbers
double coil springs (main spring and helper spring)
two-piece lower control arms for camber adjustment
reinforced, continuously variable rear axle track rod
blade-type anti-roll bar
suspension continuously variable adjustable (heights, camber, track)
three-piece BBS center-lock aluminium rims (11J x 18), rim offset 30
Michelin rain tires (27/68-18)

Bodywork
self-supporting bodyshell made out of galvanised sheet steel
carbon fibre doors with window frame and plastic rear-view mirrors
carbon fibre rear lid with adjustable rear wing
welded-in roll cage
air jack system
aerodynamically optimized front bumper and front spoiler edge
carbon fibre rear bumper
racing seat (driver side only) with fire retardant upholstery
six-point seat belt
removable steering wheel (with quick-release coupling)
electric fire extinguishing system
90 liter fuel tank
Vehicle weight: approx. 1,120 kg (Porsche Ceramic Composite Brake PCCB) or approx. 1,140 kg (Steel discs) 		   
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