The GT3 Cup Car

The Porsche 911 GT3 Cup (Type 991 II)

​

• Single-seated, near-standard race vehicle

• Based on the 911 GT3​

Recent Posts

Archive

Engine

​

• Aluminum six-cylinder rear-mounted boxer engine

• Sealed

• 3,996 cm³; stroke 81.5 mm; bore 102 mm

• Max. power: 357 kW (485 hp) at 7,500 rpm

• Max. rpm: 8,500 rpm

• Single-mass flywheel

• Water cooling with heat management for engine and gearbox

• Four valves per cylinder

• Sequential multi-point fuel injection

• Required fuel quality: minimum 98 octane, unleaded

• Dry-sump lubrication

• Electronic engine management (Bosch MS 4.6)

• Race exhaust system with regulated race catalytic converter

• Rear silencer with centered exhaust pipes

• Electronic acceleration pedal

Transmission

​

• Porsche six-speed sequential dog-type gearbox

 
Gear ratios:

Ring & pinion gear    14/22 i = 1.571
Final drive    17/41 i = 2.412
1st gear    13/41 i = 3.154
2nd gear    17/40 i = 2.353
3rd gear    19/36 i = 1.895
4th gear    19/29 i = 1.526
5th gear    24/30 i = 1.250
6th gear    34/35 i = 1.029

​

• Internal pressure-oil lubrication with active oil cooling

• Limited slip differential

• Triple-disc sintered metal race clutch

• Pneumatic paddle shift system