How often should you visit the dyno for more tuning after putting a turbo on? Let's say you stay at the same PSI at all times and do no mods.

 

then you get it dyno tuned at that setup. it's not really necessary to get dyno tuned every other month, if that's what you're asking--unless you car's a full-blooded race car. for a mild street car, do it once and have fun.