I believe Rick from Amazon racing posted something about this in the past. The bypass valve is adjusted to open at a certain level of vacuum and you can change this setting. I don't remember any more than that though. Was that the info you were looking for?
I remember something like this, but even if you do change your level of boost the eaton is still spinning, you'd save your motor some boost stress though, but then again, wouldnt tuning be an issue in that case?
i was just wondering as i would like a little more boost in 1st and 2nd but if its gonna require more than a simple turn of a screw ill just let sleeping dogs lie