ive been there driving a real NASCAR. cost about $400 for 8-10trips round the track if i remember right. it was my gf's gift 2 Xmas ago. you get to drive in sets of 3 and you all follow an instructor ahead who speeds up a little everytime round the track. by the last 2 laps, i believe we were running at 180mph plus. no speedo inside, just tach. there's a conversion table when you get back showing your approximate speed at a certain rpm.

 

emra is charging $160 for time trial events
here's the site
http://www.emraracing.org/Emratt.htm