fuel pressure

i am not sure what my fuel pressure should be set at.
i have the obx fuel pressure reg on my set up.
turbonetics t3/t4 turbo
turbo manifold
38mm wastegate
intercooler
turbo xs rfl blow off
aem cam gears
aem pulley set
obx crank pulley
skunk2 intake manifold
obx throttle body spacer
walboro 255 fuel pump
obx fuel press reg
str/bdl fuel rail
rc 550cc injectors
aem fuel filter
chipped ecu by xenocron
Uberdata
now for some reason with everything together it has a hard time starting
at first i would have to go full throttle then start it and it would run for like 3 min then die and the plugs were shot. so i kept trying to adjust the fuel press, after several sets of plugs i got the press low enough, now i have to go full throttle and start but keep full throttle while its running. its very rough and at full throttle the rpm is on like 2500, if you let go of the throttle it dies. i figured that i would have to mess with the fuel press so i can get it running.
i also had this thought that it might be the map sensor not the fuel press.
i now i need to do some tuning but the car needs to run first. ihave a man boost control, but dont know how much boost, because it wont build any since it wont start. but plan on like 8-10. i also plan on adding msd ignition setup.
sorry for the long write up
any help greatly appreciated thanx