Bob,

I have a Jett 50 on my Patriot 40. I'm using a 9x7.5 APC prop on it now. Its turning around 17,900 on the ground. I'm just looking for the best prop for speed for my Patriot. Everyone always says rpm's means speed. I was thinking about your suggestion of using an 8.75x9 prop to see if I can get just a little more speed. Can the Jett 50 take more rpm's without hurting it?

Also, is there a difference in a racing muffler and the standard red muffler that comes with the Jett 50? If there is, I want to buy one.

Thanks for your expertise!

Ken