you need to switch pulleys to run higher psi. you cant just set it for 7. Im not a sc guy though i dont really no much about them. I think the smaller pulley you get the more boost you get
Well for uping the boost in a SC yes you have to change the pulley on the charger, and for a D-series you can also smack a Y8 crank pully on it for a extra pound or so, pending if you have one or not.