Coil pack performance question.

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Niys
MegaSquirt Newbie
Posts: 1
Joined: Thu Jul 14, 2011 4:04 am

Coil pack performance question.

Post by Niys »

I'm new to the whole DIY tuner scene i was just wondering if there was a difference in performance between having a single coil controlling 4 plugs, and having individual Coils on each cylinder?

Thanks
a73camaro

Re: Coil pack performance question.

Post by a73camaro »

Since the COP is fired every 4th time, this allows for more dwell and higher RPM range.
DonTZ125
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Re: Coil pack performance question.

Post by DonTZ125 »

The benefit of individual coils is longer available dwell / charging time before each spark; a single coil firing multiple plugs has to fire far more often than a COP arrangement. At higher revs, it is entirely possibly that the charging / firing cycle of one plug begins to overlap the next, meaning that the charging time gets short-changed, and the spark gets weaker. For a COP installation, the revs have to get pretty high before you run into charging limitations...
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