It would take a great number of amps and a tremendous amount of water to run an engine off of hydrogen produced from electrolosis.
Think of it this way:
15 pounds of air for each pound of gasoline.
it takes 2 pounds of hydrogen to 1 pound of oxygen to run. That means that three pounds of water to replace each 3 pounds of gasoline. How much water do you think these "hydrogen generators" actually go through?

These "generators" are the biggest frauds that are going today. The worst part is the math doesn't even make any sense!

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Paul
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retired mechanic after 35 years
specialized in Holley carbs and Ford Automatic Transmissions