I decided to upgrade to the Vortech SFMU a few weeks ago and finally received it in the mail today. I installed it with no problems and now I am trying to figure out exactly how to work it. Do I need to set base fuel pressure of 48-50psi before or after I hook up the vacuum line? I am getting 50 without it and 37 with it at idle. Is that correct or wrong? I am letting the car sit until I hear from you guys. Thanks. Jeff