11 psi on pump gas is a walk in the park.
As for the boost gauge, they're all a little different, in my 760's (and now my 740) the bottom of the gauge is 13-14 psi, i think its 15 for the 240 turbos.
if you can get the gauge to go to the 3 o'clock position, that should be somewhere around 9-10 psi, just a hair past should be 11.
my roommate has run 15 psi (intercooled) on his with no problems.
but get a real gauge and mount it in an inconspicuous spot, they help much more than black/yellow/red ;)