Enlarge / The current crop of GTP hybrid prototypes look wonderful, thanks to rules that cap the amount of downforce they can generate in favor of more dramatic styling. (credit: Porsche Motorsport)
DAYTONA BEACH, Fla.—Near-summer temperatures greeted a record crowd at the Daytona International Speedway in Florida last weekend. At the end of each January, the track hosts the Rolex 24, an around-the-clock endurance race that's now as high-profile as it has ever been during the event's 62-year history.
Between the packed crowd and the 59-car grid, there's proof that sports car racing is in good shape. Some of that might be attributable to Drive to Survive's rising tide lifting a bunch of non-F1 boats, but there's more to the story than just a resurgent interest in motorsport. The dramatic-looking GTP prototypes have a lot to do with it—powerful hybrid racing cars from Acura, BMW, Cadillac, and Porsche are bringing in the fans and, in some cases, some pretty famous drivers with F1 or IndyCar wins on their resumes.
But IMSA and the Rolex 24 is about more than just the top class of cars; in addition to the GTP hybrids, the field also comprised the very competitive pro-am LMP2 prototype class and a pair of classes (one for professional teams, another for pro-ams) for production-based machines built to a global set of rules, called GT3. (To be slightly confusing, in IMSA, those classes are known as GTD-Pro and GTD. More on sports car racing being needlessly confusing later.)
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