Just a thought on the btu per pound. Hydrogen is so damn light. a pound of it in gas form at atmospheric pressure and temp is how many cubic feet? Also, what rate or % are they injecting the h2 into the mix? Probably enough to satisfy the requirement for improving the emisions, but it would take a good sized unit and a fair amount of electrical power to make enough H2 to actualy replace gasoline as the primary fuel.
As for the guy that was running his dune buggy on H2, what was he spending on the electricity to split the water? the energy has to come from somewhere, so it isnt like it is free energy.. Granted, big congrats to him for building a motor that ran on it instead of grenading. iIwonder if it would be posible to mix the h2 with some nitrogen or some inert gas to make it more stable. Also, what would this do to the burn rate once it is in the cylinder?
And looking at the fact the cat is no longer burning, I can see that being posible. My car has no cats, and it is cooler at the tip than it was with the cat installed.
p.s. tree huggers bite me.