have you checked that you realy get a pumpshot from the accpump? so its not just some crap stuck in it,also have yóu checked that you actualy get fuel to the accpumpwell? im thinking your not getting the fuel there..

that explains it atleast from what i saw at kjula i just thought you had a shifter problem or something other strange since i couldnt here what or if your engine did anything at the startingline with all the other cars beeing so much louder,that hemi is very quiet