If you want a hydrogen car, you can visit tokyo and lease one from Mazda
whenever you like.
http://gas2.org/2008/06/20/mazdas-new-premacy-hydrogen-hybrid-rotary-engineā¦
Hydrogen engines have been in testing and protype production since the
80s by BMW and Mazda.. They're already here. If you wanted to modify a
mazda renesis crate motor to run hydrogen, all youd need to do is plumb
a hydrogen direct injector into the periphery of the chamber, connect a
megasquirt ECU and a wideband O2 sensor, fire it up and tune it. I don't
know if its been done before outside Mazda, but youd get plenty of help
on the megasquirt forums if you were serious.
This doesnt belong on this list, and it is stupid to discuss it here.
There are far more appropriate forums.
Definitely off topic but probably not stupid.