The Car
Background
For the first time since it started building 911 Cup race cars more than 15 years ago, Porsche Motorsports has built Cup cars to specific Grand-Am Rolex Series GT rules. The factory has constructed 12 2007 Porsche 911 GT3 Cup race cars to for the 2007 Rolex Series customers in accordance with current GT class rules.
Engine:
- water cooled flat six-cylinder boxer engine
- 3,598 cc, stroke 76.4 mm, bore 99,98 mm diameter
- max. power: 309 kW (420 BHP)
- max. torque: 410 Nm
- max. rpm: 8,400 rpm
- four valves per cylinder
- 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 in accordance with Grand-Am Regulations
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
Suspension:
Front axle:
- McPherson strut-type axle
- all struts supported by Unibal links
- 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
Rear axle:
- multilink rear suspension with solidly mounted sub frame
- all struts supported by Unibal links
- 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 (height, camber, track)
Brake System:
- brake system with adjustable bias bar
Front axle:
- aluminum six-piston calipers, in accordance with the 2006 Grand
American Rolex Series Regulations
internally vented brake discs, 380 mm diameter, race brake pads
Rear axle:
- aluminum four-piston calipers, in accordance with the 2006 Grand
American Rolex Series Regulations
internally vented brake discs, 355 mm diameter, race brake pads
Bodywork:
- self-supporting body shell made out of galvanized sheet steel
- carbon fiber doors with window frame and plastic rear-view mirrors
- carbon fiber rear lid
- welded-in roll cage incl. shoulder- and door bar
- air jack system
- aerodynamically optimized front bumper and front spoiler edge
- carbon fiber 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
- 100 liter FT3 fuel tank