There's speculation that the 2014 LMP1 regulations could involve the engines from Formula 1's 2014 engine regulations. With F1's testing being so tightly restricted this could offer engine manufacturers a chance to really develop the engine and it would also offer them a way into Le Mans.
Here's the full story...
http://www.racecar-engineering.com/news/formula-1-powertrains-for-le-mans-in-2014/
Here's the full story...
http://www.racecar-engineering.com/news/formula-1-powertrains-for-le-mans-in-2014/