Ran my car for the 1st time on the 1/8th this weekend. It ran a best of 7.68 sec at 88.6 mph w/ a 60' of 1.67.
Using this converter:
http://www.hotrodpitstop.com/tools.html#3
a 7.68 1/8th would be a 12.06 1/4. Using that and the fact that my car weighs 3580 lbs (w/ me) it would take 395 HP...