Originally posted by Aaron Murakami
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I can't see WHY it won't work if both spark plugs per wasted spark coil is connecting to their respective HV positive terminals... (I think) the initial HV voltage rise on coil secondary initially has not so much to do with gap-R... but initially just with facing its own secondary coil negative output on the other side of a microscopic layer in the HV diode/s that has slammed shut - maybe while this is going on it feels or sees the other alternative path just before, during, or just as it flips its direction... (I think) it then only when it "calculates" its path of least resistance... wish I had a coil to check it out
I've seen 2 and more plugs fire plasma at the same time from the same plasma cdi - anybody on this thread can do it with a cdi firing an HV POSITIVE output coil. (for negative firing coil maybe swapping cdi terminals on the coil LV side will make it fire positive). This is how we did it:
Connect 30 1kV 6 amp diodes in series, with diode arrow bases pointing TO coil +LV & that end connected onto +LV, and diode arrow points pointing TO coil +HV & that end connected onto +HV. The cdi (+) output connects to coil +LV terminal and cdi (-) output connects to coil -LV terminal. Securely connect 2 zero resistance spark plugs center terminals to +HV output with equal lengths of at least #14 zero resistance wires. Securely connect each spark plug base with equal lengths of at least #14 zero resistance wires to -LV terminal.
While still firing only single plugs on the bench we very soon chopped off the ground straps when we improved our cdi charge frequency and managed outputs past 240 Volts, cause in firing repetitively we saw it ALSO fired straight from spark plug center electrode to spark plug base rim - it seemed like the RE saw the slightest moisture or impurities in the gap in chose that bath over and above the ground strap... just seemed logical to then chop off the ground strap and rather give the plug center an equal distance plug base rim around the center electrode so RE can "choose" its best path for each firing itself. But the place on the rim which is fired is still influenced by which side of the plug base you clamped your LV terminal onto the plug base.
Something we never tested or thought to test in firing multiple spark plugs at once, is to ad resistance in series with one spark plug in a pair to see if HV/RE will skip the one with the higher resistance, or at what ratio of extra resistance HV/RE will start skipping that spark plug. Eish!
Can somebody that has got a plasma cdi running, just hookup 2 non-R spark plugs with center electrodes to coil HV (+) and coil Primary (-) to the spark plug bases. It will fire plasma on both plugs. Then in between ONE spark plug's center electrode connection and its HV-wire, ad resistors, until THAT spark plug in the pair no longer produce the plasma effect. I know that current divides through parallel loads, but it takes the path of least resistance - so we need to now how much extra resistance it took for RE to stop the RE flowing... there is a ratio or something... it might be either ON or OFF or there is a slight gradient... PLEASE
Meanwhile - stay SAFE!!!
Hope to have you all with us in 2015 for Aaron's coming wasted spark plasma break through!
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