Porsche 911-997 GT3 CUP Coupe : 2009

This stunning 2009 Porsche 911 997 GT3 CUP Coupe has got to be one of the more amazing speeding bullets on four wheels I've seen recently.

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2009 Porsche 911 997 GT3 CUP Coupe.
215 units of this production-based racing car developed in Weissach will be built for the racing season 2009 on Porsche's production line in Stuttgart-Zuffenhausen.

The Porsche 911 GT3 Cup is entering the 2009 motorsport season with engine output of 420 hp. 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 most significant modification compared with 2007 model year is the rear end following the design of the production model. Air venting slits ensure better dissipation of heat at the rear. The 3.6-litre six-cylinder boxer engine developed in Weissach is also based on the street-legal GT3 and develops maximum output of 420 hp, 20 horsepower more than on the previous model. The sequential six-speed transmission with interruption of engine power enables the driver to shift up under full throttle without disengaging the clutch. The transmission itself has been optimised and the gear ratios adjusted to the characteristics of the engine. Weighing 1,150 kg in race trim, the new 911 GT3 Cup has a power-to-weight ratio of 2.7 kg per horsepower.

26 units of the 911 GT3 Cup built for the Porsche Mobil 1 Supercup feature a special exhaust system with an even more striking sound pattern reminiscent of the Formula 1 racing scene as well as PCCB Porsche Ceramic Composite Brakes as exclusive highlights. Compared with conventional brake discs, PCCB reduces unsprung masses by 20 kg and sets new standards in terms of responsiveness, resistance to fading, and a long service life. The racing cars entered worldwide in the Carrera Cup feature a modified exhaust system and steel brake discs.

Specifications.
- 3.6L H6 DFI DOHC Gasoline
- 6 Spd Sequential Semi-Manual
- Michelin Tires
- flat six-cylinder boxer engine
- 3,598 cc, stroke 76.4 mm (3.01"), bore 99.98 mm (3.94")
- max. output: 309 kW (420 hp)
- max. torque: 420 Nm (310 lb-ft)
- max. rpm: 8,400 rpm
- four-valve technology
- water-cooled
- dry-sump lubrication
- two-stage resonance intake distributor, central air intake
- electronic engine management system MS 3.1
- sequential multi-point fuel injection
- required fuel quality: 98 octane ROZ, unleaded
- racing exhaust with fully controlled catalytic converter (400 cells)
- rear silencer with centrally mounted double tailpipe; special exhaust tailpipes for the Porsche Mobil 1 Supercup

Suspension.
Front Axle.
- McPherson spring strut axle
- Sachs gas pressure dampers
- double coil springs (main and ancillary spring)
- adjustable sword-type anti-roll bar
- front axle arms adjustable for camber
- reinforced front axle crossbar with six-point fastening and double clamping
- power steering with electrohydraulic pressure supply
- three-piece BBS light-alloy wheels (9J x 18); ET 30 with central locking
- Michelin rain tires (24/64-18)

Rear Axle.
- 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)
- three-piece BBS light-alloy wheels (11J x 18); ET 43 with central locking
- Michelin rain tires (27/68-18)

Bodywork.
- 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 liter fuel tank
- safety bar holding the battery in position
- vehicle weight: approx 1,150 kg (1,130 kg with PCCB)

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

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 six-piston aluminium fixed callipers
- Porsche Ceramic Composite Brakes (PCCB)
- inner-vented
- 350 mm (13.78") in diameter
- racing brake pads.

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

(source: Porsche & Formula 1 Sport Cars)