This is a typical test run with the X Power Drives. We made a few laps around Lake Elsinore between 140 and 170 mph with a neat rearward camera. You know its full throttle when you hear the psi blowers really whistle. That begins to happen around 4 minutes in. Also take notice of the two different X dimensions of the drives in order to examine different efficiencies at the same time. The difference is only 1/2 inch.

http://www.youtube.com/watch?v=JHuF8T0lGeM

interesting video, would like to see some more of those engines.
looks like that boat has the hops pretty bad?

Thats interesting on the difference in the rooster tail from only 1/2 inch. I think that hop would be annoying..