The turbo has been on the car since 04 untuned. maybe 30k miles since installed because it was not a daily driver. I just bought it so hopefully it will last a little while longer until I can get it dyno tuned. Im curious as to why 7 lbs of psi would vary from turbo to turbo. I mean no matted what size turbo is on the car, 7 lbs of psi is 7 lbs. I mean I know some spool faster then others but thats the only difference. Right?