Good to hear people have actually looked at it. I am considering doing it on my 1988 GMC Sierra 2500 (350 ci). It runs propane/gas currently, but thinking about mapping out a HHO conversion that would allow me to just switch it on or off.
Reading about flammability, I thought that the HHO gas was fairly stable unless exposed to external spark or flame. I also wasn't thinking of a pump to push the HHO, was more in thinking about having it siphoned out via engine vacuum. That would take a bit more to regulate though..
After looking for a long time at doing it to the Supra, there are too many little things that can get messed up so I will try it in baby steps. Should be doable.. just have to find the correct path.
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