TECHNICAL SPECIFICATIONS
Concept:
Single-seat customer racecar
Basis:
991 GT3 RS
Engine:
Water cooled six-cylinder Boxer engine (rear mounted)
4,000 cm3; stroke 81.5 mm; bore 102 mm
Power: Subject to FIA BoP classification (air restrictor)
Single mass flywheel
Four-valve technology
Direct fuel injection
Fuel quality: Super Plus lead free to E20 (minimum 98 octane)
Dry sump lubrication
Engine control unit (ECU) BOSCH MS 6.4 with integrated data acquisition
(basic memory 1GB, max. 100 freely selectable channels, sample rate 50hz)
Race exhaust system (motorsport catalyst and country-specific pre-silencer optionally
available)
Rear silencer with twin tailpipes mounted centrally
Two electronically activated throttles
Transmission:
Porsche six-speed constant-mesh gearbox (sequential)
Gear ratios (FIA homologated, other ratios available on request):
– CWP 14/22 i = 1.571
– Final drive 17/41 i = 2.412
– 1st gear 13/41 i = 3.154
– 2nd gear 17/39 i = 2.294
– 3rd gear 20/37 i = 1.850
– 4th gear 19/29 i = 1.526
– 5th gear 24/31 i = 1.292
– 6th gear 31/34 i = 1.097
Internal pressurized oil lubrication with active oil cooling by oil/water heat exchanger
Mechanical limited slip differential
Motorsport clutch (carbon)
Pneumatic gear shift activation (paddle shift)
Rear Wing
CFRP front extended wheel arches and louvres
CFRP front fairing with cooling-air ducting and spoiler lip
CFRP rear fairing with integrated rain light in accordance with FIA regulations
Polycarbonate front, rear and side screens
Removable polycarbonate door windows in accordance in accordance with latest FIA regulations
Rear underfloor with air ducting for brake and driveshaft cooling
Modified 911 cockpit:
Ergonomic center console aligned towards driver for ease of operation
Switch covers with fluorescent labelling
Steering wheel with quick release coupling, switch panel and shift paddles
Racing bucket seat with fore/aft adjustment in accordance with FIA regulations:
Adjustable padding system to suit individual drivers (delivery with size M)
Six-point safety harness
Safety nets (centre and driver´s side) in accordance with FIA regulations
FT3 safety fuel cell (approx. 120 liter) with fuel cut off safety valve in accordance with FIA regulations
Air jack system (four jacks)
Brake system:
Two separate brake-circuits for front and rear axles. Adjustable by driver via brake balance bar
Front axle:
Six-piston aluminum-monobloc racing brake caliper with Pad retraction system
Ventilated and grooved steel brake disc D = 380 mm, aluminum disc bell
Motorsport brake pads
Optimized brake cooling ducts
Rear axle:
Four-piston aluminum-monobloc racing brake caliper with Pad retraction system
Ventilated and grooved steel brake disc D = 372 mm, aluminum disc bell
Motorsport brake pads
Optimized brake cooling ducts
Weight/dimensions:
Total weight: approx. 1,220 kg (subject to BoP)
Overall length: 4,604 mm
Overall width front axle: 1,975 mm
Overall width rear axle: 2,002 mm
Wheelbase: 2,458 mm
Suspension:
Front axle:
McPherson strut, adjustable in height (ride-height), camber and toe
Fabricated steel control arms:
Stiffness optimized
High-performance spherical bearings
Wheel hubs with center lock wheel nuts
Adjustable motorsport dampers
Machined aluminum top mount with camber adjustment
Adjustable anti-roll bar blades (left & right)
Power assisted steering with electrohydraulic pressure feed
Rear axle:
Multilink independent rear suspension, adjustable in height (ride-height), camber, toe
Machined aluminum control arms:
Stiffness optimized
High-performance spherical bearings
Wheel hubs with center lock wheel nuts
Adjustable motorsport dampers
Machined aluminum mounts
Adjustable anti-roll bar blades (left & right)
Wheels/tires:
Front axle:
One piece BBS alloy wheels according to Porsche specification and design,
12.0 x 18 offset 17
Michelin transport tires, tire dimensions: 300/650-18
Rear axle:
One piece BBS alloy wheels according to Porsche specification and design,
13.0 x 18 offset 37.5
Michelin transport tires, tire dimensions: 310/710-18
Electric:
COSWORTH color display ICD (basic memory 512MB, extendable)
COSWORTH power module IPS32
Race ABS (adjustable)
Traction control (adjustable)
Fire extinguisher system (agent: gas) with additional retaining bracket for fire extinguisher
Battery 12 V, 70 Ah (AGM), leak proof, mounted in passenger foot well
180 A alternator
Windscreen wiper with direct drive
Lighting system:
Xenon main headlights
LED technology taillights and rain light
Powertrain
Powering the new 911 GT3 R is a cutting-edge four-litre flat-six unit which is largely identical to the high-performance production engine of the road-legal 911 GT3 RS. Direct petrol injection, which operates at pressures up to 200 bar, as well as variable valve timing technology ensure a particularly efficient use of fuel. Moreover, the normally-aspirated engine offers significantly better driveability and a broader usable rev range. Power from the rear engine is transferred to the 310 mm rear wheels via a Porsche sequential six-speed constant-mesh gearbox. As in the GT road-going models of the 911, the driver changes gears via shift paddles conveniently positioned on the steering wheel.
Braking
The brake system of the 911 GT3 R also underwent further modifications and, thanks to increased stiffness and more precise control of the ABS, is even better suited to long distance racing. At the front axle, six-piston aluminium monobloc racing brake callipers combined with ventilated and grooved steel brake discs with a diameter of 380 millimetres ensure outstanding braking performances. Fitted at the rear axle are four-piston callipers and discs measuring 372 millimetres.
The Chassis
Adopted from its production sibling, the 911 GT3 R features the distinctive double-bubble roof, and the wheelbase which had been lengthened by 8.3 centimetres compared to the previous generation. This ensures a more balanced weight distribution and more predictable handling particularly in fast corners corners in comparison to the previous GT3 R. By applying systematic lightweight solutions for the body, add-on parts, and suspension, the engineers significantly optimised the centre of gravity position of the GT3 R compared to the predecessor model. The lightweight body design of the 911 GT3 RS production sports car featuring intelligent aluminium-steel composite construction has proven to be the ideal basis for the race car. The roof, front cover and fairing, wheel arches, doors, side and tail sections as well as the rear cover are made of particularly light carbon-fibre composite material (CFRP). All windows – and for the first time even the windscreen – consist of polycarbonate.
Safety
Another development focus was on the safety features of the GT3 R. The capacity of the further-reinforced FT3 safety fuel cell was increased by twelve litres to now hold 120 litres, with the tank now featuring a fuel cut-off safety valve. The doors and the side windows can be removed, and the escape hatch in the roof is now larger. In the event of an accident, the new racing bucket seat offers pilots even better protection.
Aerodynamics
The aerodynamics of the 911 GT3 R also follows the example of the road car. The distinctive wheel arch air vents on the front fairings increase downforce at the front axle. Measuring two metres in width by 40-centimetres in depth, the rear wing lends aerodynamic balance. From its 911 RSR big brother, the GT3 R has adopted the concept of the centrally-positioned radiator. By eliminating the side radiators, the position of the centre of gravity was improved, the radiator is better protected against collision damage, and the venting of hot air through louvers in the front cover was enhanced.
ELIGIBLE IN THESE COMPETITIVE SERIES…
IMSA WeatherTech SportsCar Championship
The WeatherTech SportsCar Championship is a sports car racing series based in the United States and Canada and organized by the International Motor Sports Association (IMSA). It is a result of a merger between two existing North American sports car racing series, the American Le Mans Series and Rolex Sports Car Series. The initial United SportsCar Championship name of the series was announced on March 14, 2013, while Rolex SA signed their Tudor brand to a title sponsorship deal. WeatherTech later signed a deal to take over title sponsorship of the series starting in 2016, rebranding the series.…LEARN MORE