My best time was 15.5 at 90mph. My care is stock. I would be a little dissapointed if I picked up only 1/10 after all the work your friend put in his car. A little more time at the track may be all he needs. It's a fine line between bogging, traction and too much wheel spin.
04 SVT Focus
"lunch box" muffler delete
15.35 @89mph, 2.29 60', 9.90 1/8 (100% stock)