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Record attendance, an excellent fan experience, and close racing don't happen by accident. IMSA has been planning this from the start.

Synonymous with Porsches, a routine winner for Dan Gurney which helped the Toyota brand build its name in IMSA GT racing, Dennis Aase (top right) was one of the most respected and accomplished drivers in North American sports car racing.

SPEAKING OF WARNER As a longtime Road & Track photographer and writer, Warner was present at hundreds of noteworthy races. The Other Side of the Fence: Six Decades of Motorsports Photography, Warner’s new book, debuted at the Concours, and it contains some never-before-seen images from F1, NASCAR, IndyCar, IMSA, Le Mans and other sanctioning bodies taken from 1959 to the present day. It will be available on Amazon.com June 1. SEMINARS A SUCCESS As usual, there were a pair of well-attended seminars on racing topics: Friday was on “Chevy Thunder,” the history of Chevrolet’s small-block...

How IMSA Sorts Out Close Calls At the Finish Line Wild Mazda MX-5 Cup finishes has put IMSA timing and scoring to the test. By IMSA Wire Service IMSA In the very first Mazda MX-5 Cup race under IMSA sanction at Daytona International Speedway in January, the top seven finishers finished less than four-tenths of a second apart. The primary tool for deciding results comes from the electronic timing and scoring system. All competing cars carry a transponder, and every track has a series of timing loop wires embedded into the surface at various locations around the circuit, including the ...