For the first time in the 911’s illustrious 54-year history, the engine of the 2017 GTE racing car will be located ahead of the rear axle. Basically, what has happened, is that the engineers have turned the engine and gearbox through 180 degrees, such that the engine sits ahead of the rear axle with the gearbox behind it. This development has been achieved without any special dispensation or waivers being sought.
This unusual step has been taken in accordance with the rules governing the sport and the class that the LM GTE PRO car will race in, which allows for the ‘optimisation’ of the engine position for racing purposes. While you could argue that this development might be stretching the point slightly, it is perfectly legal and has been allowed by the FIA, WEC and IMSA rules. Porsche will enter two works cars in both the WEC and the IMSA series in 2017.
Also a first in 2017, the new car will feature direct fuel injection, something that was seen in other 911 racing categories, but not used by Porsche for the 911 RSR. Porsche decided to retain its naturally-aspirated 4-litre flat-six engine. This decision, along with the rotation of the engine layout, allowed Porsche greater liberty with regard to weight distribution. Another benefit of this revised engine layout is that it has enabled the engineers to fit a significantly larger rear diffuser to the new car.
The new Porsche 911 RSR will make its debut in the Rolex Daytona 24-Hour race in late January 2017.
|Engine||Water-cooled six-cylinder boxer engine located in front of the rear axle|
|Bore x stroke||102mm x 81.5mm|
|Power output||ca. 510 hp (375kW) depending on restrictor|
|Valves||four-valves per cylinder|
|Fuel||direct fuel injection|
|Gearbox||six-speed sequential constant-mesh; two-shaft longitudinal layout with bevel gear|
|Shift||shifting via electronic shift actuator; shift paddles on the steering wheel|
|Differential||multi-disc self-locking diff with visco unit|
|Clutch||three-disc carbon race clutch|
|Front axle||double wishbone front axle; four-way vibration damper; twin coil spring setup (main and helper spring); anti-roll bars, adjustable by blade positions; electro-hydraulic power steering|
|Rear axle||integrated rear axle subframe with double wishbone axle; four-way vibration damper; twin coil spring setup (main and helper spring); anti-roll bars, adjustable by blade positions; tripod drive shafts|
|Brakes||two independent brake circuits for front and rear axle, adjustable via balance bar|
|Front axle||one piece aluminium six-piston racing callipers with quick coupling; internally ventilated steel brake discs, race brake pads; optimised brake cooling ducts|
|Front discs||390mm diameter|
|Rear axle||one piece aluminium four-piston racing callipers with quick coupling; internally ventilated steel brake discs, race brake pads; optimised brake cooling ducts|
|Rear discs||355mm diameter|
|Front axle||one piece forged light alloy wheels|
|Front wheels||12.5Jx18 offset 25 with centre lock nut|
|Front tyres||Michelin slick 30/68-18|
|Rear axle||one piece forged light alloy wheels|
|Rear wheels||13Jx18 offset 37 with centre lock nut|
|Rear tyres||Michelin slick 31/71-18|
|Body||Weight-optimised chassis in combined aluminium steel design; removable roof hatch for cockpit access; lifting bushes integrated in the roof; FT3 fuel cell in front of the car; welded-in roll cage; seat pursuant to FIA 8862-2009; rigidly mounted to the chassis; six-point safety harness for use with HANS; longitudinally adjustable pedalry; bodywork made of CFRP, quick-change; rear wing with “swan neck” mounts; four-post air jack system with safety pressure valve; electronically activated fire extinguisher system; heated windscreen|
|Electrics||Cosworth Central Logger Unit; CFRP multi-functional steering wheel with integrated display; shift paddles and quick release; Collision Avoidance System; controlled alternator in connection with LiFePo4 battery; LED headlights; LED taillights plus rain light; illuminated car number and leader light system; black light inside cockpit; electric adjustable wing mirrors with memory function; tyre pressure monitoring system (TPMS); drink system; air conditioning system; membrane switch panel on centre console with fluorescent labelling|
|Weight||ca. 1243kg (base weight per regulations)|
|Length||4557mm (without splitter, rear wing, diffuser)|
|Width||2042mm (front axle)/2048mm (rear axle)|
Written by: Glen Smale
Images by: Porsche