If you have clamp amper meter, you can check current in coils wire.

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DreamV4

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It would be interesting to know current in a wire, going to ignition coil at idle and higher RPM. Based on current with OEM coils at 1000/2000/5000 RPM, additional resistor for COP can be calculated.
Estimated time to check amps is probably around 1 min. + time to remove seat.
We just need to find a rich guy, who has $15... :)
Current most likely increases 2x, when RPM increases 2x (let us say from 2000 to 4000). Highest Amps can be calculated w/o running engine at 10k RPM (is redline 10k?)
 
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