hi darzeelon
i am sure if i went to a smaller prop ( 11/5 )and was turning 13,600 with my 61 sf my horse power will exceed your numbers-i have no need to run 1,000 rpms more -as the speed and power of this engine in this plane is a true hand full-the kahosairframe is an extremlly efficient airframe -horse power number are not the do all -end all in an airplane set up- the best possible vertical-is my criteria for performance-and everyengine needs to bepropped differently -fora given airframe