Please see #01 Ganassi Riley-Ford Leads Rolex 24 at Ten Hours
On lap 318 Pierre Kaffer brought the GTLM class-leading #62 Risi Ferrari in after only 15 laps. An engineer brought out a laptop and attempted to divine the nature of the problem, which after —the car started up and took off. The team manager said only that the engine had lost power.
The team installed a new ECU, but the problems persisted and a couple of laps later the car pitted and went behind the wall.
This left Ryan Briscoe in the #3 Corvette with the GTLM lead, ahead of Wolf Henzler in the #17 Falken Tire Porsche and Simon Pagenaud in the #4 Corvette.
The battle in GTLM was somewhat muted temporarily by the loss of the Risi Ferrari, but the fight in GTD made up for it, with Rene Rast in the #48 Miller Racing Audi R8 chased the #33 Riley Viper driven by Jeroen Bleekemolen. The Viper had an excess of power; the Audi had much better brakes. For the first several laps of the battle, power was triumphant. Then the lapped #73 Park Place GTD Porsche got between the two GTD leaders, giving Bleekemolen a slight margin.
