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I don't think I understand how you could remove the butterfly with an HHO mod though? Is a pulse width modulator acting as the throttle?
For a mod'd petrol engine or a hypothetical fully converted HHO engine?
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Yes pulse width modulator as throttle, for a modded petrol engine.
But I think it might need more hydrogen flow than a generator can provide, I don't know.
My theory comes from watching that series of youtube videos I linked earlier. In one of the videos, they run a small 5hp horizontal shaft engine that has had the carb completly removed. There is no air control at all.
They insert a thin hollow tube into the hole where the carb used to bolt up, and place the tube so it is far inside the hole, close to the intake valve. They blow hydrogen down this tube. They are able to start, idle, and run the engine at varying speed by ONLY increasing or decreasing the flow of hydrogen from a tank.
So my theory is, you could remove any air control on a car engine (like the butterfly valve in a throttle body, I guess you need the throttle body just to hook up the air filter easily). Then you add just enough hydrogen all the time so the engine just idles (with no air control mind you). Now you add gas from the injectors to increase/control the engine speed.
I really suggest you watch the whole series of videos. It is pretty amazing to see a spark ignition engine run with no air control.
silverknight has some good posts earlier in the thread, he has posted while I have been previewing mine.
