Quote:
Originally Posted by MB-Dude
False. I’m sorry Mike, but the addition of resistance “in series” to the secondary side of any transformer (which is what a simple automotive coil is) does not place additional demand on the secondary voltage. This simply causes less current to flow from the secondary side of the coil. In essence, less spark energy would be created. If anything, it would be less stressful on the coil because the increased resistance from secondary through the high voltage wire through the resistor spark plug allows less current to flow. Less secondary current flow equates to less energy being coupled through the coil from the primary side. The coil runs cooler and less stressful.
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This is missing the point - less current flow at some point will not sustain the plasma at the plug tip, where the resistance will jump from near 0 Ohms to no connection - open circuit, infinite Ohms. The coil voltage output at this point of the discharge cycle may be high enough to damage its insulation dielectric, but insufficient to re-create a plasma. With less series resistance initially, plasma would be sustained due to higher current flow, until coil output voltage falls to a safe level.
This speculation is simply to show that increasing secondary resistance at some point will likely cause a problem. Don't screw with the engineered parameters!
Steve