I,v been running boats for 2 years and have always ran 40% omaga fuel ,I have two htb360 boats with 7.5 k&b motors with erwin quiet pipes and i run 1450 props ,i'v ran 45-48 mph will different fuel make a big change in mph, i read alot of info on here about boats running mid 50,s is this posible or hobby lies. Iv never raced but plan on joining the race seen this year ,i need some good info. THANKS