Your guide
I SEE .............................
Looks like we have someone interested in my area. Depending on what you want to have out, depends on what type of coil you will use. Oil filled coils of yesterday have the lower 10,000 volts you mention, however if you use the newer coils like late 90's GM, you can reach nearer to 40,000-70,000 volts, Some will work at 100,000 volts. Depends on your goal. However I know where you are going and you misunderstand what Stan is doing with that output! That output is actually going to the spark plug itself, so don't think it will work inside the cell, IT WON'T ! Also, you will want to make sure that the coil only fires at TDC or after on the cylinder that is taking in the HHO, preferably around 4 degrees after.
Questions ???????????? Just ask.
Its done right or its not done !
Hail HHO.