To me, this is a shame, the rotory is a beautiful piece of engineering, and tons upon tons of power is available. i just cant for the life of me understand swapping it for any other engine. In fact, I'd love to swap in a 3 or 4 rotor for the z, and my IS300. to put it this way, if you are able to build a quad rotor, and have a dremel, you can have 450 hp, N/A without sacrificing any drivability. and the torque figures are pretty decent too...