IMSA and WEC have several endurance races, but there's no definition of "endurance" in racing. Some labeled endurance races are 24 hours long, while others last four, six, or 12 hours. Some even ...

IMSA President John Doonan said this weekend ... Any new future entries—Genesis from the Hyundai family and/or Ford, maybe—would mean a few current entries would not make the cut.

Courtesy of IMSA The International Motor Sports Association (IMSA) is having a moment. Buried for decades behind bigger and more-popular racing series, the Florida-based IMSA series is fighting ...