Quote:
Originally Posted by JapaneseJeep
This all seems solid, but still leaves the question of how the studies I mentioned came to their conclusions using similar methods. Particularly in the first paper, where the HHO generator was of an (albeit optimized to the particular engine) dry-cell plate design and managed to reduce fuel consumption by 34% while connected to the alternator.
Alas, I don't think this will be settled without experimentation.
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Broadly speaking, every HHO study I've found hasn't actually stood up to rigorous scientific scrutiny. They're generally snake oil.
There are some small benefits, such as hydrogen burning faster than gasoline and allowing slightly less advanced ignition timing, and the extra knock resistance, but from a total system energy perspective they produce 1/5 the energy they consume.