Hey Vertigo,

If you just want speed, think about a Speed Cobra ? small airplane, std. for a 10cc like a Hanno Prettner OS (rear exhaust - piped), or anything fitting a fan.
Record set in the time right after it was designed was set well over 300km/h, while in that time a .61 normally didn't run faster then 15 -16.000rpm. Imagine with something running at 25000rpm [8D]

greetz,

Steven