With a 1900lb dragster, I have seen data (forget the drivers name) that shows when you dump 26 mph in the right lane of the Super Comp finals at the 2007 Belle Rose Sportsnationals, it's about 9 hundredths.
That's strictly on the top end ... no screwing around before 1100'.
http://www.dragracecentral.com/DRCSt...r2007#indextop