2016 Porsche 911 (991) GT3 R debuts at Nurburgring with 500 hp

Article by Andrew Christian, on May 15, 2015

Porsche unveiled at the Nurburgring the all-new 2015 Porsche 911 (991) GT3 R, its latest racing car based on the 911 (991) GT3 RS production sports car. According to the German manufacturer, the engineers focused on the lightweight design, better aerodynamic efficiency, reduced fuel consumption, improved handling and increased safety.

Just like the production version, the 911 GT3 R arrives with the distinctive double-bubble roof, while the wheelbase was lengthened by 8.3 cm compared to the previous generation. Moreover, thanks to the systematic lightweight solutions for the body, add-on parts and suspension, the centre of gravity position of the vehicle was also optimized compared to its predecessor.

In addition, the roof, front cover and fairing, wheel arches, doors, side and tail sections as well as the rear cover are made of light carbon-fiber composite material (CFRP). In order to save weight, all windows (for the first time even the windscreen) are made of polycarbonate.

Aerodynamics of the 911 GT3 R are inspired by the road car and we find the distinctive wheel arch air vents located on the front fairings, which increase the downforce at the front axle, we well as the big rear wing measuring 2 metres in width by 40 cm in depth.

Furthermore, the 911 GT3 R adopted the concept of the centrally-positioned radiator, which eliminates the side radiators and improves the position of the centre of gravity. Braking system was improved too and arrives with six-piston aluminum monobloc racing brake calipers and ventilated and grooved steel brake discs with a 380 mm diameter at the front, while the rear axle received four-piston calipers and 372 mm discs.

The capacity of the FT3 safety fuel was increased by 12 liters, which means that now holds 120 liters, with the tank featuring a fuel cut-off safety valve. The race car is powered by the same 4.0-liter flat-six petrol engine found on the road-legal version, which delivers 500 hp (368 kW).

Power is delivered to the 310 mm rear wheels via the Porsche sequential six-speed constant-mesh gearbox. The driver is able to change gears via the shift paddles positioned on the steering wheel. Pricing starts at 429,000 euros plus country-specific VAT and the first units will be delivered from December 2015. [source: Porsche]

Press Release

2016 Porsche 911 (991) GT3 R

Based on the 911 GT3 RS production sports car, Porsche has designed a customer sport race car for GT3 series around the world: The 911 GT3 R. In developing the more than 368 kW (500 hp) racing nine-eleven, special attention was paid to lightweight design, better aerodynamic efficiency, reducing consumption, improved handling, further optimised safety as well as lowering service and spare parts costs.

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.

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.

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.

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.

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.

The new Porsche 911 GT3 R can be ordered immediately for 429,000 Euro plus country-specific VAT and will be delivered from December 2015.

Technical description Porsche 911 GT3 R (991)

Single-seat customer race car based on the Porsche 911 GT3 RS
Engine
Water-cooled six-cylinder boxer engine (rear mounted)
4,000 cm3; stroke 81.5 mm; bore 102 mm
Output: over 368 kW (500 hp) subject to FIA BoP (air restrictor)
Four-valve technology
Direct fuel injection
Dry sump lubrication
Transmission
Porsche sequential six-speed constant-mesh gearbox
Mechanical slip differential
Pneumatic gear-shift activation (paddle shift)
Bodyshell
Lightweight body featuring intelligent aluminium-steel composite design
Integrated (welded) roll-cage according to FIA Appendix J
Removable escape hatch in roof
Lightweight exterior design:
CFRP doors, rear cover, rear wing, wheel arches, front and rear fairing
Polycarbonate glazing
Removable polycarbonate door windows
FT3 safety fuel cell, approx. 120 litres, with fuel cut off safety valve in accordance with FIA regulations
Air jack system (four jacks)
Suspension
Front axle McPherson strut, adjustable in height, camber and toe
Wheel hubs with centre-lock wheel nuts
Adjustable anti-roll bar blades (left and right)
Power-assisted steering with electro-hydraulic pressure feed
Rear axle
Multilink independent rear suspension, adjustable in height, camber, toe
Wheel hubs with centre-lock wheel nuts
Adjustable anti-roll bar blades (left and right)
Brake system
Two separate brake circuits for front and rear axles; adjustable by driver via brake balance bar system
Front axle
Six-piston aluminium monobloc racing brake calliper
Ventilated and grooved steel brake disc, D = 380 mm, aluminium disc bell
Rear axle
Four-piston aluminium monobloc racing brake calliper
Ventilated and grooved steel brake disc, D = 372 mm, aluminium disc bell
Wheels/tyres
One-piece BBS alloy wheels according to Porsche specification and design, 12.0J x 18 offset 17, tyre dimension: 300/650-18 front; 13J x 18 offset 37.5, tyre dimension: 310/710-18 rear
Electrics
COSWORTH power module IPS32
Race ABS
Traction control
Weight/dimensions
Total weight: ca. 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: 2,463 mm
Car price: 429,000 Euros plus country-specific VAT

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