well i put the aftermarket gauge on and its reading that my turbo is spooling a lot faster. turns out both gauges were accurate at full boost though. the stock one never got over 15 psi, and the aftermarket one did not either. turned the gillis valve up and im gettting a solid 17-18 psi and the turo seems to be spooling at a resonable rate now.....at least according to the other gauge.