Originally Posted by
vegasmax
HHo is a higher octain fuel and burns fast....
Actually you have it backwards... HHO is a lower octane fuel.
The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gasoline ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting. HHO ignites at a lower pressure than gasoline, so therefore it has a lower octane rating.
Racers use high octane fuel because they are running a much higher compression than your average grocery getter. Anybody who believes that higher octane gives you more power, has bought into the gas companies hype. Octane adds nothing to the power of an engine. It only keeps the fuel from self igniting.
However your comment on being careful with leaning out your engine is spot on. I highly recommend people get an EGT. They are a bit pricey but well worth the safety to your engine.
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Some days I get the sinking feeling that Orwell was an optimist!