Are Resister Plugs required with EI?

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The R factor is mostly over rated worry. First R was for AM radio static then Police radio's and now the digital signals for sensors and ignition feed back. Best place to put R factor is the caps as wires of carbon core can break and R factor varies with length too. But if cap go bad then ride goes too. Sparkplugs are 2nd best R factor but also vary a good bit in their ohm values. Even though all the digit ignitions warn to use 5000-ish ohm factor most all of then work fine as long as digit brain not sitting right next to coils which is where most the back lash RF ringing radiates from. On purpose or accidental situation substitutes of nil R factor in HT leads can reveal if your case is R sensitive or not. The BMW bike range are the folks to learn about the R factor faults and solutions from in ignition systems from this. Ideally inductance ohms can be measured then balanced out with added resistance ohms. The R factor limits spark current not voltage btw. Fat current flow is what starts fast fires more than brightness of the spark.
 
Guido said:
Just simple copper core wires, non resisted.
Been running like this for the last 2 years.
Have I just been lucky?
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I think Steve Kelly of Tri-Spark would be the best person to answer that question.
 
I ran non-resistor (copper core) wires on a car with a Pertronix ignitor, and it would misfire above 2800 rpm. When I put resistor wires on, it stopped misfiring. The distributor is buried in the engine compartment, surrounded by the iron block and body sheetmetal, so I am sure there is plenty of RF "echo" going on, but I think the sensitive little brains of these things like electronic peace and quiet.
 
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