B18C1CYA

I am in need of some help with the settings on the profec in order to keep the boost steady. I am trying to run 11psi on my high boost setting but it dosnt hold steady at all. i have a deltagate and maybe thats the problem? I am useing the compressor housing for the pressure source to go into the unit in the car could this be my problem? If anyone has settings could they please post them thank you.