Is it a timed event? Or a select number of laps?
I was pretty surprised to find out that the GT races at Jennings were 9 laps, & the sprints 6 laps.
Most GT races are 25 min in length and the CMP schedule indicates that to be the case.
http://ccsracing.us/schedules/2012/2012%20schedule%20pdf/CMP%20April%20SCHEDULE.pdf (http://ccsracing.us/schedules/2012/2012%20schedule%20pdf/CMP%20April%20SCHEDULE.pdf)
The 25 min clock starts when the 5 board goes up - not when the green flag drops.
That's what I thought......like I said, I was kinda surprised at the 9 lap GT's