Stopwatch

Building IMSA into a global powerhouse of sportscar racing in its first 20 years was a team effort. No one made "Racing with a Difference" more real for competitors than Charlie Rainville, IMSA's first chief steward and race director. Charlie was one of a kind and set a standard that is still followed today.

The relationship between IMSA, the FIA and the organizers of the 24 Hours of Le Mans has taken many turns over the years. Read about how it all got started in the early days of IMSA, through the GTP era.

Long-time IMSA mechanic and crew member Martin Raffauf recounts what it's like to go for a ride in the legendary Ferrari 333SP IMSA WSC prototype from the 1990s around the world famous Mugello track in Italy.

The 1,000th Formula One Grand Prix of the modern era was recently held at Shanghai in China. We thought it would be cool to look back at some fascinating photos from the very first race - the British Grand Prix held at Silverstone on May 13, 1950. Re-posted with permission from the Klemantaski Collection blog, Peter Sachs author.

When IMSA published rules for a new kind of prototype class in 1980 called IMSA GTP, BMW collaborated with March Engineering in the UK to produce one of the first examples. That started the ball rolling for what would turn out to be a long, successful participation of March-based GTP cars in the Series, including two overall championships in 1983 and 1984.

It's well known that post-war road racing started at Watkins Glen in 1948. But how and why did racing move "up the hill" from the village? Read all about it in this post from IMRRC Historian Bill Green.

The 1975 running of the 12 Hours of Sebring saw BMW take victory with the potent CSL in the hands of Hans Stuck, Sam Posey, Brian Redman, and Allan Moffat. But it wasn't without controversy as corner workers kept radioing in that the car's brake lights weren't working in turns one and two.

The selection of motor racing's early "national champions" was not very scientific and has endured a number of revisions over the years. Famed motor racing historian Don Capps proposes that revisionism used in American football might help explain what happened.

The 12 Hours of Sebring is one of the three most iconic sports car endurance races in the world, along with the 24 Hours of Le Mans and the Rolex 24 at Daytona. The Sebring event has been held uninterrupted since 1952 but its future wasn't always assured. The 1972 race looked to be the last - until a trio of heroes stepped in to save it.

The 1989 Camel GT season was hotly contested between the TWR Jaguars and the powerful Nissan GTP ZX-Turbos run by the highly successful Electramotive team. Nissan had won the six races leading up the Portland round in August that year. And they would have won that race as well, if not for highly unusual circumstances at the end of the race.