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Notes and notations on the 2014 Rolex 24 at Daytona [w/video]

This year is the 52nd edition of the Daytona 24 Hours. The 2014 Rolex 24 at Daytona is also the first race of the year in the brand new TUDOR United SportsCar Championship (TUSCC) With the merger of the American Le Mans Series and Grand-Am Rolex Sports Car Series rewriting and revising the rules of American sports car racing right up until yesterday, we've made the journey to an intermittently wet and constantly freezing Daytona Beach, Florida with Audi to watch the new R8 LMS and every other competitor explore the limits of those rules on the track.
With a ton to cover - and a couple of videos below to watch, including some slo-mo qualifying footage and a hot lap in an R8 LMS - let's not waste time with chit-chat, eh?
Quick things to know about the classes and the leader-light system:

Porsche says it found 'irregular' software as Germany recalls diesel Cayenne

BERLIN - German Transport Minister Alexander Dobrindt on Thursday announced a recall of Porsche Cayenne models equipped with 3-liter diesel engines after finding potentially illegal emissions controlling software in the vehicles. Dobrindt told reporters he was withdrawing certification for the vehicles, which will need to undergo a software update to regain legal status. Sports car maker Porsche AG is owned by Volkswagen, which in 2015 admitted to systematic manipulation of engine management software to cheat emissions tests. Porsche on Thursday said it had discovered "irregular" engine management software during an internal probe into emissions. Porsche also said it had agreed to recall the vehicles to fix the problem. "The producer will of course bear 100 percent of the costs," Dobrindt said. "There is no explanation why this software was in this vehicle." The minister said: "We have examined Porsche Cayenne vehicles of the 3 liter TDI Euro 6 Mark - during tests these vehicles deploy a so-called defense strategy, which isn't activated in real traffic." "In our view that is a kind of test recognition, which we regard as an impermissible deactivation strategy." "Even if there is a modern exhaust gas cleaning system in these vehicles, if this software is nonetheless there it is illegal, does not meet the legal requirements and needs to be removed," Dobrindt said. He also said that Porsche would quickly be in a position to bring the software into conformity with the law. Dobrindt also said there were some 7,500 vehicles of this type certified in Germany and some 22,000 certified in Europe. "We don't know how many are with dealers. These are the cars that fall under the certification ban." The Porsche Cayenne model shares components with a sister model, the Volkswagen Touareg. Asked about Volkswagen's Touareg model, Dobrindt said: "On the technical question, it is assumed that this vehicle has a similar parameter set but identical construction does not mean that the same software was used in it but it is assumed that the same software was used." He said the Transport Ministry was, however, checking that and a hearing with Volkswagen would show whether that was the case or not, adding: "The probability is high." Volkswagen CFO Frank Witter had no immediate comment about the Porsche recall on a VW earnings call also held on Thursday.

The 2013 Rolex 24-hour race at Daytona comes down to the last hour [spoilers, w/video]

It took 24 hours to run the race, but it was the last one was stuffed with the high action as four cars were still trying to figure out how to gain victory on the track and in the pits. Along with the obligatory crashes, spins, mechanical issues and retirements had come numerous penalties, a double-digit number of full-course yellows and two hours of fog that turned early Sunday morning into a stretch of parade laps.
The final hour would make up for the morning - drivers who might have been happy just to get on the podium had a shot at victory as the end of the race approached, and that turned into a few gambles that paid off, and at least one that didn't...