Here is one interesting observation from a Dingle water car video. Please note while he is demonstrating to the reporter at approximately the 4:55 mark he puts a test light in the cell and it lights up. Also note that he asks the reporter to touch the water and no electrical shock occurs. This would seem to indicate that he is using high voltage
and very low current to perform electrolysis.
YouTube - Daniel Dingle Water Car (extended version) - part 1
(Check from 4:55)
This also would seem to be the case with Stanley Meyers method of electrolysis.
"Meyer's cell seems to have many of the attributes of an electrolytic cell except that it functions at high voltage, low current rather than the other way around."
"A witness team of independent UK scientifc observers testified that US inventor Stanley Meyer successfully decomposed ordinary tap water into constituent elements through a combination of high, pulsed voltage using an average current measured only in milliamps. Reported gas evolution was enough to sustain a hydrogen /oxygen flame which instantly melted steel."
"One demonstration cell was fitted with two parallel plate "excitors". Using tap water to fill the cell, the plates generated gas at very low current levels --- no greater than a tenth of an amp on the ammeter, and claimed to be milliamps by Meyer --- and this gas production increased steadily as the plates were moved closer together and decreased as they were separated. The DC voltage appeared to be pulsed at tens of thousands of volts."
Stanley Meyer: Water Fuel Cell
I truly believe both of these guys used a very similar approach to get a large amount of hho gas from their cells without consuming a lot of amperage.