Mk3 supercharger qustions

Long time lurker decided to finally ty to get my fj running as good as possible but I feel like something isn't adding up or I underestimate my location factor. But what are you guys seeing boost and airflow? I did some testing today in anticipation of getting the stage 2 tune but I have the c38-81 charger with the 75mm pully urd equal length long tube's thorley y pipe trd cat back. I live in las vegas and I seem to only be able to get to 5 maybe 6 psi and using obdlink I'm only seeing 247 g/s and that seems like it's low. Or possibly the ucon is just telling the ecu that? Any one have any incites? I also did a boost leak test to rule that out and noticed this solenoid seem to open up at 10 psi is that normal? I sent an email to gadget already.