Whether something like the MYT is going to work depends on the details like how the fuel injection is done, the sealing of the pistons in the bores, how the pistons are attached to the crankshaft, etc.; all the things they gloss over. There's also the issue of the fact that only so much heat can be gained by burning so much fuel. That is, even if the engine were somehow 100% efficient, reasonably simple calculations (for a chemist) of the heat released on combustion coupled with the Ideal Gas Law will indicate whether it can simultaneously be more efficient and more powerful than conventional engines, or not.

It's good that people are thinking about things like this, but it's a shame that too many inventors like him seem to make such grandiose claims without putting forward evidence.

Cheers,
Scott.