April 30, 1987: Bill Elliott sets fastest speed record at 212.809 miles per hour at Talladega.http://abcnews.go.com/Sports/story?id=3455755&page=1
yes that is correcy but 5/4/86 he did212.219 at dega
I would think they could run 250 mph without much problen they actually they have restrictors on there cars stopping them from going faster.
the race referred to at Talladega was the reason restrictor plate racing was born there was a terrible wreck that took out a large section of the safety fence and injured fans