So I'm thinking more and more about boost but before i pull the trigger. First and fore most Im looking at the sibler turbo. Question number one is if i got the waste gate that i could dial it down to 4 pounds of boost could i run good 91 octane and not wore about det? I know ill turn it up to 7 or 8 pounds on good snow day and plan to run av gas mix. Most days i won't drop below 5000 feet and if i do its all trail ridding in. Question number 2 is how long are you guys running on a top end before you replace pistons and rings? Just want to know what I'm getting into before i pull the trigger and still have to decide if i want to keep the 163 or drop to 154. I know theres a lot of info in here and i did some digging but didn't find everything i was looking for. Thanks for your time!