I dont think that should be a big problem, I'm looking at 310's for 6 - 8 psi, sure its not the same as 11 psi, my buddy had the same injectors in his GS turbo running 10 psi.
Terry1999 Eclipse GsMods: CAI, Apexi N1, Trans-Go Shift KitWaiting: Apexi SAFC, 310 Injectors, money