The Runoff's and now I am seeing Majors are stating their races as X number of laps or 40 minutes.
My understanding of timed races is that when the Leader crosses the finish line AFTER the designated time then becomes the winner.
What I saw in Runoff's races that ended up being Timed was that the winner had a winning times of LESS than 40 minutes.
The Rolex 24 Hour race isn't over when the leader crosses the line at 23 hours 59 minutes and 55 seconds - why should SCCA timed races end BEFORE the designated time ?