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01-07-2018 #3
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Oh yeah and all the parameters you asked about change with different coils. A COP fires one direction on plug from center to ground. In DIS one cylinder fires center electrode to ground the paired cylinder fires from ground to center electrode. Dwell times are longer on COP as it has bit more time to saturate but this difference is moot as the internal resistance can be adjusted to allow faster saturation ( we are talking microseconds at high rpm) but the difference with quality ignition parts are negligible. Also chain store coils tend to be spotty in quality if you race a lot. For DD they work fine.
Push a LSx to 8000 RPM and local duralast coil may not keep up with AC Delco/Delphi replacement.
Nissan is so picky about COPS I have yet to find aftermarket COPS to run and not set codes in early 2000 Nissan v6 engines. They keep setting coil codes as computer monitors them somehow.
Lee Abel
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