ORIGINAL: the Wasp
OK,, if you bought one of those S-90K's you could use a 3 Blade Prop on it, the S-90K's Engines run best at 11,000 to 12,000
as for Braking-In a Ringed Engine, just running them a bit rich for a gallon will be good..
BTW, most stock Glow Plane Engines in these sizes will happily run on 15%, and Heli Engine will run on Fuel as low as 10%
Others have said it and I tried it for my own satisfaction. At least with my K&B
and my TT .46 pro on a Jett muffler, I saw no appreciable performance improvements running 5% nitro vs. 15% nitro. The K&B is timed so low, it could probably swing a hockey stick and still be happy on 5%. It runs really hot and overheats on 15% no matter the prop.
I'm not set on any brand over the other, but I am basically looking for something that'll spin the 13x6 or 13x7 props I have 1,500rpm faster than what the K&B will do, or better. Those are big ol' props that are easily capable of good speed with the right amount of power. I am not opposed to an engine running a smaller prop spun faster but I would think I'd have to go overkill and get a Jett and I see that being a waste on the flatbottom hull. I'm saving the Jett for my other airboat.
For now I'll keep shopping around.. any other thoughts are welcome!
Thanks for your input, guys.. I appreciate it.