Hal Prewitt Racing - Porsche GT3Cup 997- Jan 5, 2007

2006 GT3Cup 997 Specfications:

Concept

Porsche 911 GT3 Cup 997 single-seated, near-standard race vehicle was developed based on the current 911 generation. The development was focused mainly on aerodynamics. 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 up-shifts at full throttle without using the clutch. In Porsche Michelin Supercup (Europe) the race cars are equipped with the revolutionary Porsche Ceramic Composite Brake (PCCB), whereas the race cars used in the Carrera Cups (other parts of the world) use a high-performance steel brake.

Electrics

Bosch engine management and Motec display with integrated data recording - Battery: 12 Volt, 50 Ah - 90 Ah generator

Vehicle Weight

Approx. 1,120 kg (Porsche Ceramic Composite Brake PCCB) and approx. 1,140 kg or 2,513 lbs (Steel discs)

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.

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.

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

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

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)

Rims/Tires

Front axle: three-piece BBS center-lock aluminium rims (9J x 18), rim offset 43 - Michelin rain tires (24/64-18). Rear axle: three-piece BBS center-lock aluminium rims (11J x 18), rim offset 30 - Michelin rain tires (27/68-18)

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

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