went to the track last night .. trying some new tires out 275/60/15 mickeythompson drag radials..they would not hook trying to dump clutch ..had to roll out at 4000 rpms ..ran 11.52@114 i know the mph is off..i was spraying a 50 dry shot on it i put my bap on , 1st, 2nd, and 3rd felt great ..when i hit 4th it would just start bogging down had to let off ..im thinking the 39#'s are done need some 60's !!