My 2c...I'm replying here because I was referred to an old thread from a search of "IHI" (our supercharger) that had not been active for five years and was unsure of the status of replying to old threads. Since the O.P. refers in that thread to symptoms with his supercharger that I am currently experiencing, I had the choice to either reply, or start a new thread and I am still uncertain which way to go. As far as closing the old posts, I think that keeping them open is the way to proceed with the board....I'll go reply to the old thread, if theres an issue, I'm sure I'll hear about it.....Peace