We all know that intake air temps really affect turbocharged vehicles. Had a chance to do some back to back runs and and see just how much of a difference 20* F would make. I wrote about the findings in my blog (linked below). So yes, a 300whp k04 MPS3/6 in the winter will not be near that in the summer.

Blog : The effects of intake air temperatures on turbocharged vehicles : Stratified Automotive Controls