
The GT3 Cup Car

The Porsche 911 GT3 Cup (Type 991 II)
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Single-seated, near-standard race vehicle
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Based on the 911 GT3

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Engine
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Aluminum six-cylinder rear-mounted boxer engine
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Sealed
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3,996 cm³; stroke 81.5 mm; bore 102 mm
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Max. power: 357 kW (485 hp) at 7,500 rpm
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Max. rpm: 8,500 rpm
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Single-mass flywheel
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Water cooling with heat management for engine and gearbox
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Four valves per cylinder
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Sequential multi-point fuel injection
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Required fuel quality: minimum 98 octane, unleaded
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Dry-sump lubrication
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Electronic engine management (Bosch MS 4.6)
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Race exhaust system with regulated race catalytic converter
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Rear silencer with centered exhaust pipes
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Electronic acceleration pedal

Transmission
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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
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Internal pressure-oil lubrication with active oil cooling
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Limited slip differential
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Triple-disc sintered metal race clutch
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Pneumatic paddle shift system