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A few pre-race notes and a lot of photos from the 24 Hours of Le Mans

The 82nd running of the 24 Hours of Le Mans is on.
Audi has won 12 of the last 15 events, the scion of Auto Union is trying to make it 13 this year. To do so, it will have to overcome a situation faced only three other times during its dominance of La Sarthe: underdog status. Toyota has won the first two races of the year and claimed pole for this race, the rumor being that this year it's Toyota's race to lose.
And then there's Porsche. It's been 16 years since the Stuttgart brand raced on the top rung at Le Mans, three years years since it announced its return, just a year since it acquired Mark Webber in a signing that wasn't subtle and a few months since we got eyes on the 919 Hybrid.

Porsche reveals new 911 GT3 R at the Nurburgring

On any given weekend, you're bound to find gaggles of Porsche 911s zipping around most any race track. Now Porsche has revealed its latest competition model at no less fitting a location than the Nurburgring. The new 911 GT3 R replaces the existing version, slotting in below the 911 RSR. It's based closely on the road-going 911 GT3 RS, and retains the same 4.0-liter naturally aspirated flat-six with direct injection and variable valve timing, but tuned to deliver over 500 horsepower, transmitted to the rear wheels through a six-speed sequential paddle-shift gearbox and mechanical limited slip differential. The wheelbase has been stretched over three inches for better weight balance compared to the outgoing GT3 R, further optimized by more lightweight components and a central radiator to lower the center of gravity. The lightweight bodywork is made of aluminum, steel, and carbon fiber, and for the first time all of the glass (including the windscreen) has been replaced by plexi. Stopping power is provided by six-piston aluminum monoblock calipers gripping 380-millimeter steel discs up front, with four-piston calipers and 372-mm discs at the back. The safety fuel cell can now hold 120 liters of fuel with a cut-off safety valve, the doors and windows can be removed, and the escape hatch is bigger, too. All of this adds up to the promise of a more competitive GT3 R ready to take on the competition, available to privateer racing teams from December for 429,000 euros before tax – working out to about $487k at current exchange rates. World premiere at the Nurburgring Lighter, more economical, faster: the new 911 GT3 R Stuttgart. 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.

Porsche LMP1 to use 4-cyl hybrid powertrain [w/poll]

With the Formula One season - and indeed his entire F1 career - now behind him, Mark Webber took advantage of his early release from Red Bull Racing to try out the new LMP1 which Porsche is developing, undertaking the final test session of 2013 before Porsche throws it head first into the FIA World Endurance Championship next April. The session - which followed previous tests at Magny-Cours, Monza, Paul Ricard and the Eurospeedway at Lausitz - was held at the Algarve circuit in Portimão, Portgual, in collaboration with Michelin, which is developing the tires for the car. But that's hardly the news here.
No, the news is the first confirmation we've seen on the type of powertrain Porsche has developed for its new Le Mans prototype: a gasoline-burning four-cylinder engine with direct injection and two energy recovery systems. This contrasts sharply with the V6 turbodiesel and single electric motor used by Audi in the R18 e-tron Quattro (or at least the outgoing version) or the naturally-aspirated V8 and single electric motor found in the Toyota TS030. Flexibility in the rules set down by the FIA and ACO give the manufacturers that kind of latitude, prompting F1 teams like Ferrari and Renault to consider developing their new engines for Le Mans prototypes as well.
At this point Porsche isn't saying how large its four-cylinder engine is or how much power it will produce. But it'll be interesting, to say the least, to see how it fares against the Audi and Toyota in next year's championship and at Le Mans when it'll be piloted by Webber, former Lola LMP1 driver Neel Jani and Audi's own 2011 Le Mans-winning pair of Romain Dumas and Timo Bernhard.