It depends on what oil you re running...
When you run a higher viccosity oil it will always run lower pressure when warm...
For example...
running Mobil 1 you will run a lower pressure than with Motul 4100 Turbolight. then again you will run a lower pressure if you use Motul 8100V... the first and 3rd oils are full synthetic and the other one is semi...so this ALSO has an affect.
2 on the guage at idle is fine, its approximately 29PSI, however you want it to run about 40PSI when accelerating...