Porsche 911 GT3 Cup
Powering the Porsche 911 GT3 Cup is a 3.8-litre, six-cylinder boxer engine. Thanks to the weight-optimised modular race exhaust system, the vehicle generates 460 hp (338 kW) at 7.500 revs per minute, ten horsepower more than its predecessor. Power is delivered to the rear axle via a race clutch and a Porsche Motorsport designed six-speed dog-type gearbox with a mechanical limited slip differential. For the first time in a Porsche makes cup race car, gear shifting is performed with paddle shifts on the steering wheel.
Developed from scratch, the new engine offers even greater power output than before. This four-litre six-cylinder boxer unit delivers up to 357 kW (485 hp) at 7,250 – 8,000 rpm. Drive force is transmitted to the rear axle by a racing clutch and a Porsche six-speed sequential dog-type transmission. Gears are changed manually by means of paddle shifts with electropneumatic assistance.
A key advantage of the new drive system: we’ve managed to double the engine and transmission run times before the first rebuild is due (engine: from 50 to 100 hours; transmission: from 30 to 60 hours). For reduced operating costs.
In the race department at Weissach, the suspension underwent modifications to ensure higher precision and more stability at high speeds. Compared to its predecessor, the wheelbase grew by 100 millimetres, improving handling at the limit. Porsche Motorsport redesigned the single-piece 18 inch race rims with central locking. The width of the Michelin racing slicks at the front axle grew by two centimetres to now measure 27 cm, and at the rear axle by one cm to 31 cm.
The newly-developed racing brake system improves the endurance qualities of the 911 GT3 Cup 991. The internally vented and slotted steel brake discs with a 38-centimetre diameter are operated by aluminium six-piston monobloc racing callipers in the front, and four-piston units at the rear. Two independent brake circuits deal with for front and rear axle and are adjustable via brake balance system.
Aluminium six-piston racing callipers in monobloc design; multi-piece steel brake discs, inner-vented and slotted, 380 mm diameter; racing brake pads, optimised ventilation ducting.
Aluminium four-piston racing callipers in monobloc design; multi-piece steel brake discs, inner-vented and slotted, 380 mm diameter; racing brake pads, optimised ventilation ducting.
McPherson suspension strut, adjustable in height, camber and track; forged strut with optimised stiffness, two-shear connection, heavy duty spherical bearings; wheel hub with centre lock; racing shock absorbers; forged supporting mounts; adjustable double-blade type anti-roll bar; power steering with electro-hydraulic pressure feed.
Multilink suspension, adjustable in height, camber and track; forged strut with optimised stiffness, two-shear connection, heavy duty spherical bearings; wheel hub with centre lock; non-adjustable racing shock absorbers; forged supporting mounts; adjustable double-blade type anti-roll bar.
Engineers gave the further improvement of driver safety high priority again in the development of the new Cup vehicle. Drivers are protected by a redesigned safety cage and race seat, specially moulded around the head and shoulders and individually adjustable with the help of a padding system. A rescue hatch in the roof provides easy access for primary medical attention and for the extrication of the driver. As with the road-legal car, the body of the new 911 GT3 Cup combines highest rigidity with low weight thanks to its smart aluminium-steel composite construction. The latest 911 GT3 Cup weighs in at just 1.175 kilograms.
Safety has been further increased. The enlarged roof hatch provides easier access to the driver. In addition, the proven bodyshell of aluminium and steel hybrid construction satisfies all safety requirements. The new front and rear aprons feature integrated FIA rain lights for the first time.