Well the thought is that i dont know how accurate all my information so far is as i have had large problems in my testing procedures. As far as I know this is the only post that I have ever seen that has this kind of information on ryobis. I think regardless weather I start a new thread or continue on this one I need to startf rom the begining again when i get my testing procedure worked out better.

I really do need to get my hands on that book.
My library dosent have it does anyone know where to get it?

Ok here is the perfect reason why i started this post.

http://www.rcuniverse.com/forum/m_8616877/tm.htm

7500 on a 18-6 prop and absolutly no information on the setup. taken from a troybuilt but no info in the cylinder it uses. I know im using an 18-8 but i just cant see that making that much difference. I just dont understand how hes getting to 7500 when i cant get past 7400 with all ive done so far?