heres the fastest sl55 timeslip
2003 Mercedes-Benz SL55 AMG Hyevon Motors 1/4 mile Drag Racing timeslip specs 0-60 - DragTimes.com
he plenty modded but 1000 lbs heavier. isnt it .1 for evry 100 lbs? so stock v8 in the xfire should be close to this time