Those are good numbers!!
Have you tried a 5 blade prop? When I went from 36 4 blade bravo to the 5 Blade it was a different boat in every way for the better. The guy I sold my boat to put on a set of 6 blades and got even more out of it. Although mine was at the surface more then your is but it may be worth trying.
Those 36 Bravo 4 blades slap the water pretty hard and give a lot of stern lift.
I am talking to Steve about doing a open bow so I will loose about 10 mph. I am not looking for the top number I just want a boat that can go over 100mph any day at high altitude on pump gas. The open bow is a must from the wife so not much choice there.
And yes it does help if the blower belt is not slipping
Let me know how it goes.
BTW- Any luck on side mirrors??