Diesel power has emerged as the dominating fuel in Le Mans series endurance racing, with Audi and Peugeot competing neck-and-neck for top honors. But that's about to change, if the Automobile Club de l'Ouest (ACO) has anything to say about it. ACO, the body that organizes the 24 Hours of Le Mans and the LMS championships in Europe and North America, has announced new rules aimed at reducing the performance of the diesel racers to level the playing field with the gasoline-fueled competitors.
The new regulations would include air restrictors reduced in diameter by 10% and a decrease in allowable turbo boost on the oil-burners. The move is also aimed at impeding laps times in the name of safety, with a 3 minute 30 second La Sarthe lap time as the target, where the Peugeot 908s lapped the circuit in the low 3:08s this year.
Additional rule-book amendments include the banning of tire warmers, a reduction in the permissible size of rear wings and the allowance of only one wheel gun for each pit crew, all in an effort to reduce costs and raise lap times.