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Porsche 911 GT3 Cup (991.2) (2016-2020) – Specifications & Performance

(2016-2020) Porsche 911 GT3 Cup (991.2) Technical Specifications


Single-seater production-based race car
Base model: 911 GT3


Aluminium six-cylinder horizontally opposed engine, rear-mounted
3,996 cm3; stroke 81.5 mm; bore 102 mm
Max. power: 357 kW (485 hp) at 7,500 rpm
Max. rpm: 8,500
Maximum torque: 480 Nm at 6,250 rpm
Single-mass flywheel
Water-cooled with thermal management for engine and transmission
Four valves per cylinder
Variable cam phasing (intake and exhaust)
Direct fuel injection
Fuel grade: Super unleaded, minimum 98 RON
Dry-sump lubrication
Electronic engine management (Bosch MS 4.6 NG)
Race exhaust system with regulated race catalytic converter
Rear silencer with central twin tailpipe
Electronic throttle


Porsche six-speed sequential dog-type transmission
Gear ratios:
– Ring and 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 by
oil-water heat exchanger
Mechanical differential lock
Triple-disc sintered metal racing clutch
Pneumatic gearshift activation (paddle shift)


Intelligent lightweight construction in aluminium and steel composite
Weld-in roll cage, certified compliance with FIA homologation regulations for safety cages
Front lid with two air intakes for cockpit ventilation, quick-release catches
Removable roof section in compliance with the latest FIA safety regulations
Fastening point preparation for central safety net attachment
Pickup point for lifting device
Modified and widened 911 GT3 wings
Enlarged rear wheel arches
Modified and widened 911 GT3 front apron with spoiler lip
Modified 911 GT3 rear apron with integral rain light in compliance with
FIA homologation regulations
Lightweight exterior:
– carbon-fibre reinforced plastic doors with SportDesign mirrors
– carbon-fibre reinforced plastic rear lid with quick-release catches
– carbon-fibre reinforced plastic adjustable rear wing (nine positions)
– polycarbonate rear side windows with air outlets
– polycarbonate rear screen
Rear underbody panelling with NACA ducts for brake and driveshaft cooling

Modified 911 cockpit:
– weight-optimised magnesium subframe
– ergonomic driver-oriented centre console
– control switch trim with fluorescent lettering
– steering wheel with quick-release coupling, control panel and shift paddles
– adjustable steering column with steering angle sensor
Racing bucket seat with fore/aft adjustment:
– homologated to latest FIA requirements
– padding system for adapting to individual driver (delivered with size M)
Shock-absorbing roll cage safety cover for leg protection in driver’s footwell
Six-point racing safety harness
100-litre fuel cell (FT3 safety fuel cell) and ‘fuel cut-off’ safety valve in accordance with
FIA regulations
Built-in air jack system (three jacks) with valve mountable on either side of the car


Forged control arms:
– optimised stiffness
– double-shear track rod connection
– heavy-duty spherical bearings
Wheel hubs with central locking device
Racing shock absorbers, non-adjustable
Double-blade-type adjustable anti-roll bars
Tyre pressure monitoring system
Front axle:
– McPherson suspension strut, adjustable for height, camber and toe
– forged and adjustable top mounts
– electrohydraulic power steering with external control function for
easy car manoeuvring
Rear axle:
– multi-link rear suspension, adjustable for height, camber and toe
– forged top mounts

Brake system

Two independent brake circuits with brake pressure sensors for front and rear axle,
adjustable by the driver via brake balance system
Derivative sensors and harness for retrofitting an ABS system
Multi-piece steel brake discs, internally vented and slotted,
diameter: 380 mm
Racing brake pads
Optimised ventilation routing
Front axle:
– six-piston aluminium monobloc racing brake calipers
with ‘anti-knock back’ piston springs
Rear axle:
– four-piston aluminium monobloc racing brake calipers
with ‘anti-knock back’ piston springs


Front axle:
– single-piece centre-lock alloy wheels conforming to Porsche specification
and design, 10.5 J x 18 ET 28
– treaded Michelin transportation tyres; tyre size:
Rear axle:
– single-piece centre-lock alloy wheels conforming to Porsche specification
and design, 12 J x 18 ET 53
– treaded Michelin transportation tyres; tyre size:

Electrical system

COSWORTH colour display ICD with integrated fault diagnostics
COSWORTH electrical system control unit IPS32
Electronic throttle
Fire extinguishing system (extinguishing agent: gas)
Battery 12 V, 70 Ah (AGM), leakproof, in co-driver’s footwell
175-A alternator
Weight-optimised fan
Windscreen wiper with direct drive (intermittent and continuous operation)
Lighting system:
– Bi-Xenon main headlights
– LED daytime running lights
– LED taillights and rain lights in compliance with
FIA homologation regulations
Two additional switches in the centre console for
additional power consumers
CAN connection (data logger, video system)


Total weight: ca. 1‚200 kg (2,645.55 lbs)
Total length: 4‚564 mm (179.01 inch)
Total width: 1‚980 mm (77.95 inch)
Total height: 1‚246 mm (49.06 inch)
Wheelbase: 2‚456 mm (96.69 inch)


Water-based paint
Exterior: white C9A
Interior: filler coat in white, no clear-coat finish