to keep the fuel pressure high, is best to rewire the fuel pump as in the NB the alternator/PCM regulate the voltage of the fuel pump. I can send you a relay with 30amp fuse all ready to install with thick 10gauge wires along with instructions so you can bypass the OEM configuration and have a solid setup. It used to be on my fuel pump in order to prevent voltage drop from the Aeromotive A1000.
shoot me an email if interested.