Check out this video of OPS (outlaw pro street) racing here in MD at 75-80 dragaway. This is a heads up class that runs on a maximum 10.5 inch rear tire. The bad boys in this class run in the 4.90's in the eighth (7.40's in quarter). If you ever get a chance to check this stuff out don't pass it up. My brother in law drives and tunes one of these cars and has been as fast as 7.25 in the qtr!

http://www.shakedownmotorsports.com/video/2003.wmv