Well since i got my turbo wich was a big upgrade from my n/a, I have heard that the weather outside can effect your boost thus effecting your power. I hear also when its raining out or shitty wheather it boost lower or had less power or something im not all sure how this all works with a turbo but some info on it might be great, As my car seems to have less pull latly becuases of the moist raining weather. Hear it has something to do with AFM or something like that i dunno... fill me in plz