There are a limited number of seats available. Reservations will be on a first come,first serve basis. The maximum speed of a plane occurs when the drag equals the propeller thrust. Assuming thrust to be constant, the only way you can get more speed is to reduce drag. There are three categories of drag and the one you can readily do something about is parasitic drag.
Tests show that as speed is doubled, drag is squared.
Look for ways to reduce drag and your plane will be faster. After reducing drag, the speed will unload the prop in flight. This is like driving your car around in second gear. To get all the speed coming to you for your drag reducing efforts, try a higher pitch prop to compensate for the unloading of the original prop. Flies great, looks great.