[Warpspeed]

There was a guy in the States about thirty years ago, I think his name was Bill Keane. He built a slingshot dragster that used scuba diving tanks to supercharge his engine via a very large multi stage pressure regulator system.

The idea was that the compressed air dropped to a very low temperature from the Joule Thompson effect, when the air was throttled through the pressure regulator. So although the actual boost pressure going into the engine was not very high, it was very cold and very dense.

Also, because the engine only had to run for a few seconds at a time, enough air could easily be carried to make this work. It was so effective they banned it.............. Hmmm.