[jeffski1]

I have a Nology ProFire Ignition Coil I bought several years ago off ebay. I don't know why I bid on it. I think I just threw in a low ball bid and actually won. I remember it was listed as 'new' and I have to say, it doesn't look like it's ever been installed before.



   



So my question is...should I use it -or- sell it?



Is it any better than our stock coil? Are there any pit falls or dangers to using it?



I did a search on the forum and came up with nothing.



Any thoughts gents?

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[xrad]

Primary Resistance black 1.0 ohms blue 1.3 ohms

Secondary Resistance black 10.6K ohms blue 8.95K ohms

Turns factor (at a given frequency) black ~100 blue ~80.6



Nology: 0.6 ohms.. can;t find the windings.



Basically, when voltage is cut in the primary winding, it produces a voltage change which as it collapses produces a respecitvely greater voltage in the secondary winding (based on number of turns, resistance, and frequency)



Nology states their coil produces 40,000 volts. Well, these are manufacturer numbers and given all circumstances and your ignitor, I would say true numbers probably 25,000 -35,000. Bosch Blue rates at about 16-20,000v.



you could probably get away with using the nology coil, but I would upgrade to silcone 8mm wires. I do not know how the ignitor will stand up to coil resistance change. I have been using bosch Black and blue coils(main difference I think relates to type of oil and a few windings...however, there are differences in each coil based on location of manufacture and age) without any problems in several cars WITH the addition of a Crane digital smart ignitor. Although coils type is very important, the ability of the ignitor to adjust to different resistances and rps I think plays a more important role.



Don;t get me wrong, BOTH matched appropriately to your engine needs(fuel burn density, peak charge time-rpms), wires, and plugs is necessary for the best result.



I have been very satisfied with the Crane system I installed. no issues.



see:

http://www.968forums.com/index.php?showtop...=crane+ignition





Also, if your change your ignition system, i would suggest also changing the O2 sensor at the same time.

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[jeffski1]

Thanks xrad. I didn't realize there was so much to think about in regards to coils. Glad I asked. Now the answer is clear...as mud.



I changed my wires to Magnecor (KV85s I think) some time ago (from Nology HotWires nonetheless).



I guess, as long as my Bosch unit is working, I will leave well enough alone, and resist the urge to change a part for the sake of part change.



I read your post on the crane unit. Sounds good. I may look into that down the road.

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[jlm968]

I'm a bit surprise there isn't more discussion on this forum about coils. The Bosch oil-can coils originally installed in 968's are dinosaurs compaired to solid-core coils. An even better upgrade would be individual coil packs for each cylinder.

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[xrad]

agreew ith Jlm. and you can find individual COP's from GM and other manufacturers which fit for much less than Porsche, if you need to save a few buck. But now you have to upgrade the electronics of your ignition...or go with stand alone system like Haltech which can fire sequential COP's and injectors for ultimate control.



But for the few hp gains, I think it is not worth it for street cars/daily drivers

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