MSCC

I have install stage 3 hot cams, huge aluminum air box with the biggest k&n filer two brother Full system, High Compression head at 13.1 with a pcIII., but I am having a mayor problem tunning it., can get it to wake up., we dyno it but could not get anything over 37 HP,t it keeps asking for more fuel that it can give., the PC is max out on 50 but it is still shocking at 8000 rpm., Any suggestion on how to resolve this., I am thinking to go back to the OEM cams., Help.......