im usually anywhere between 12-1600 on the launch the 315/50 mt started hooking well as soon as the track got a little heat in it the first three passes we blew the tires off it ,I them put curts launch tune in and she started hooking hard then finally I was able to put all the ytimimg down low ,,our 9,73 amd 9.75 runs we lost fuel pressure and went into injector pulse with and bled boost ,,we had one pass the car shut down and we ran a 9.90 at 118 lol