Decrease spark dwell time, improve firing? - Ford Focus Forum, Ford Focus ST Forum
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Old 02-21-2013, 08:30 AM   #11
Roadworthy
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Join Date: Jan 2013
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Location: Edmonton, Canada
What I Drive: 2012 SGM MK3 Titanium

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Sooo for an update!
Using the copper strand pieces seemed to work pretty good. You can increase you gap a tad but I think the coils themselves need an upgrade for this kind of change to give better results.

Increasing the gap on these cars (still about -5 here) didn't really give more power/mpg as it seems to lose out on clean burns at WOT as the side of the ground strip on the spark plug gets sooty.

So yes, a larger coil would improve spark output but the cost just isn't there. If you had to replace 1 to 2 COP's for whatever reason, maybe upgrade then.
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