My V-20 performance

[THEFERMANATOR]

15 pitch stainless will be your best bet for that boat. You have the same basic combo as my V and I topped out close to 30, and cruised around 20-22 turning 4200-4400 RPM's. My max RPM's were 5300. Milage on that boat is actually not very good as it is underpowered pretty badly. That 115 is working it's tail off to push that boat. Mine burned 32 gallons in just over 2 hours of running, so 1.5 miles to the gallon is about all it will get. Unfortunately your best option is to repower as there isn't alot you can do to that 1.6L to make alot more HP. You could swap over to a bubble back exhaust and go to the bigger carbs, but it still would only get you a few more HP and use ALOT more fuel. At least you already have the right boat to start a bracket project with. Where are you located at?