Paul, I gps'ed the hydromotive 4 blade last week, fully loaded, full tank of gas, all my gear, nice water with about 6" chop, 86.7 I feel like it is a 90ish prop, but like I said it creates a lot more lift than the ally cut trophy that you had. I am getting a feel for it though, and like what I have seen so far, I did not like it to begin with even though the hole shot was good. If I can hit 90 with it I will be happy.