Well it looks like it has more btu's than E85, for what that's worth. NHRA having a rule against it does make it less interesting. I don't think it poses any greater danger of fire than a good old nitrous fire mixed with tranny fluid, or a fuel pump still feeding the fire.

That turbo idea is interesting. Do people inject propane in gasoline turbo applications? Seems like it would allow you to run around on pump gas and really run the boost up when you used propane without having all the inter cooler clutter and having to pack ice in them.