Why would he need to run 12 psi if he has chipped ECU and upgraded injectors....there are plenty of people out there that haven't done any fuel tuning and are running high boost on pump gas. Hell, Mitch from AMZ pulled 535 rwhp on pump gas with untuned fuel and ignition other than base tuning from upgraded ECU (I think he has Ashspec, not sure though). You would definately be safe at 14 psi...maybe even up to 16-17 or wherever stock I/Cs hit the point where they heatsoak bad and don't cool enough air.