[RedDevil]

Mmm. The inefficiency of heat engines is mostly due to thermodynamical limitations, not the combustion process itself. HHO cannot change that.

The challenge is to make the subject understandable for the audience you are communicating with. Unless you just want to make them believe you are right, not truly understand it.
I for one am interested but sceptical; I will not accept HHO does any good until I understand why - or see proof.

I have taken the subject to a specialist in the field, by the way; namely my physics PhD brother in law, who has been working on stirling engines and is now involved in a generator project.
Like many he thinks that small amounts of HHO cannot have a significant effect on the efficiency of an engine.
He is willing to discuss almost any aspect of combustion engines - but not HHO. He said it is just a waste of time.