From the very start, the vehicle was designed to be suitable for long-distance racing. A new body structure with a longer wheelbase and new intake air ducting provides a solid platform for the efficient delivery of power. The powerplant is a 4-litre version of Porsche’s water-cooled, horizontally opposed six-cylinder boxer engine. Output is transferred to the rear axle by means of a new six-speed sequential Porsche GT racing gearbox, while paddles deliver faster, more comfortable gearshifts. The axle geometry further optimises aerodynamics for even greater efficiency. Less drag coupled with increased downforce reduces the tendency to understeer and allows higher speeds when cornering.
Technical description
Body
Self-supporting body in steel aluminium hybrid design (basis 911 Carrera 4, type 991); welded-in safety cage; removable roof hatch; body widened and aerodynamically optimised with carbon parts; front underbody aerodynamically optimised; PC side and rear windows; adjustable rear wing; steering wheel with shift paddles; six-point safety belt; racing bucket seat; FT3-safety tank with fast filling function; air jack; fire extinguisher.
Engine
Six-cylinder aluminium boxer engine in the rear; bore 102.7 mm; stroke 80.4 mm; capacity 3,996 cm³; power output approx. 345 KW (470 hp) with restrictor; four valve technology; water cooling; dry sump lubrication; multi-point fuel injection; weight optimised modular race exhaust system, twin-branched muffler with centred exhaust pipes.
Transmission
Porsche six-speed sequential dog-type gearbox with pneumatic shift mechanism; oil/water heat exchanger; hydraulic disengagement lever; single mass flywheel; three-plate carbon clutch; rear wheel drive.
Suspension
Front axle: Fully adjustable double wishbone; 4-way gas pressure shock absorber; double coil springs (main and helper); adjustable blade-type anti roll bar; power steering.
Rear axle: Multi-link axle with rigidly mounted cross member, adjustable ride height, camber, track; 4-way gas pressure shock absorber; double coil springs (main and helper); adjustable blade-type anti roll bar.
Brake system
Brake system with balance bar control and optimised cooling air ducting.
Front: Monobloc six-piston aluminium fixed callipers; steel brake discs internally-vented, 380 mm diameter; racing brake pads.
Rear: Monobloc four-piston aluminium fixed callipers; steel brake discs internally-vented, 355 mm diameter; racing brake pads.
Wheels and tyres
Front axle: 12.5J x 18, central bolt, Michelin racing 30/68-18. Rear axle: 14J x 18, central bolt; Michelin racing 31/71-18.
Electrics
Cosworth colour display with integrated data recording and gear shift point display; Cosworth electrical system control; lightweight lithium-ion battery 12 V, 18 Ah; 140 A alternator; air conditioning.
Dimensions/Weight
Length: 4537 mm
Height: 1212 mm
1245 kg (minimum weight in compliance with regulations).
Source: Porsche
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