Originally Posted by
myoldyourgold
With simple brute force electrolysis most gains in an already efficient engine are a result of a lean fuel mixture. Remember unburnt fuel is 3% or less in most engines today or they will not pass smog. When you lean the fuel mixture out in an ICE the burn rate slows down the leaner it goes resulting in not enough time to burn all the fuel in the power stroke, making excess heat, less HP, and causes the engine to miss and over heat. The supplementation of HHO increases the combustion speed and extends the equivalence ratio lean-limit of the mixture reducing the misfiring and excess heat. The savings without leaning things out is hit and miss depending on how efficient/inefficient the engine is and your driving style. I have always been very skeptical of large gains with out leaning out the fuel. When you understand exactly what is happening, then you know that without leaning out the fuel the gains are hit and miss and marginal at best. The exceptions are almost unexplainable or more likely just fiction. With a fuel management system where you have complete control and know how to use it, will result in you being able to get the maximum possible gains and still have good HP. It takes a lot more HHO than most snake oil sales men are saying when you have control of the fuel system. Small amounts of HHO are only relevant when you have no or limited control of the fuel mixture and timing.