ORIGINAL: SV27dayton
40 is a lofty goal on nmh, and you wont get there with a CF48 (but you'll have fun trying). Don't plan on ever going 50 with the SV. It's just not realistic. You'll be invested in lipos by then and a new motor and ESC. Andy then you'll decide the hull isn't stable enough. Guess what? That's a different boat! 50's are too much for a 27" V hull (IMO).
This is all true. though I've said my SV goes 50, that is SV hull/hardware only, and the boat is not raceable at that speed. I burnt my stock ESC and motor (seperate incidents) in my Pmono SV and replaced them with a barracuda 125 ESC and an Ammo 2300kv motor. I wouldn't have done it, but I had the parts from other projects. You'd spend nearly $1000 for an SV that goes 50 if you want my setup. Shoot for 40mph with reliability/stability and see what happens.
CF48 will limit run time and heat everything up alot. You also have to learn to work your metal props. I have great teachers in my local club that have helped me get the most out of my props.
I won't be running my SV in Pmono next year...getting a bigger boat. Why? because the SV can't handle race water at the speeds I'd like to be running. Like 50+.[sm=devious.gif]