Posted by JDEM on March 31, 2018 at 05:53:29 from (174.230.14.121):
There has been some discussion about ignition coil polarity at the Ford area of these forums. I disagree with a few of the comments made. Note - in my opinion, nobody yet has a full understanding of how electricity works. Electrical systems are based on several unproven theories and predicted behavior (based on past behavior).
When it comes to ignition polarity - it has been clearly demonstrated for over 100 years - that spark-plugs are somewhat polarity sensitive. Subsequently, coil polarity has some importance.
Some of my older auto and tractor manuals claim a coil's max output at the spark-plug can be 30% less if the polarity is wrong with certain coils. I do NOT claim to have done much testing myself.
Superturbodiesel wrote . . .
“Ignition coils are not designed to work only for a specific type of grounding. They can be used on a positive or a negative grounded battery system, meaning that they will work with either type of grounded system.”
From what I have read - that is not universally true.
JMOR
“Almost any honest person will never know the difference whichever way the coil is connected. Their will always be somebody that swears that they reversed their coil and got better results......but can never prove it. “
I suspect it is hard to prove unless in a "make or break" situation.
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