I built a turbojet engine out of a garrett turbocharger once. It was quite the learning experience to say the least. The compressor wheels in the small turbos were used in the early turbojet engines for a while. The last time I ran this engine was on straight propane pressure out of the tank without the regulator. RPM was much higher than in the video below.

http://www.vimeo.com/6121972

MACE