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Join Date: Mar 2004
Location: City of Seattle, WA
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DME coil vs CDI coil
I did some searching and I don't think this has been covered.
The question is whether a DME coil is very close to a CDI coil or not. I can't help noticing that the CDI coil is around 200 bucks in the pelican catalog, and the DME coil is only about sixty. I don't know much about the carrrera 3.2 ignition, perhaps it has totally different coil requirements. If you've been around you've seen the debate about using the bosch blue coil on a CDI, as on an SC. I DO NOT want to re-open that debate here, but post from Steve Weiner seems more informed than most of what I have seen. Quote:
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Andy |
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01-07-2005, 05:47 PM
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Location: Manhattan Beach, CA
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A coil is a coil is a coil, generally!
Most any coil will work with a CDI system but not for a TCI system (like a 3.2). The key value though is the turns ratio. It should be about 100:1 which the blue Bosch (later) should have. Avoid the silver Bosch coils, as they are not reliable. Check out this web site (www.systemsc.com) on the Technicaal page under Ignition Systems for more info.
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Have Fun Loren Systems Consulting Automotive Electronics '88 911 3.2 '04 GSXR1000 '01 Ducati 996 '03 BMW BCR - Gone |
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01-07-2005, 06:31 PM
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CDI ignitions do not use a coil . I just looks like a coil , but its not . Completely different part .
Kurt Williams
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Never drive faster than your gaurdian angel can fly. 82 SC w/965S eng and G50 6:1 hp/w ratio 72 911t 2.6 twin plug and 72' 911t 57k orig 1 own miles 65/66 912 1 owner 76k orig 01' Aston Martin DB7 V12 Vantage Coupe 6spd |
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01-07-2005, 07:29 PM
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"CDI ignitions do not use a coil . I just looks like a coil , but its not . Completely different part ."
WRONG! CDI systems use an ignition coil with less inductance (generally), and they basically function as a pulse transformer. Read the literature and NOT the marketing B.S.
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Have Fun Loren Systems Consulting Automotive Electronics '88 911 3.2 '04 GSXR1000 '01 Ducati 996 '03 BMW BCR - Gone |
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01-07-2005, 08:14 PM
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So Loren,
I gather that you disagree with these statements regarding a bosch blue coil with an OEM CDI: Quote:
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Andy |
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01-08-2005, 12:09 AM
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the CDI box draws more current than necessary without delivering full output voltage.
one doesn't get full performance when using the Bosch Blue Coil with the Bosch CDI. ------------------------------------------------------------------------ Ridiculous! More B.S. to get you to waste your money. Like I said before, read the technical info at www.systemsc.com/technical.htm The coil has NO effect on the input current (power) and the spark energy, not like a conventional ignition.
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Have Fun Loren Systems Consulting Automotive Electronics '88 911 3.2 '04 GSXR1000 '01 Ducati 996 '03 BMW BCR - Gone Last edited by Lorenfb; 01-08-2005 at 08:00 AM.. |
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01-08-2005, 07:57 AM
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Well, my car does seem to be running just fine with this set-up.
Thank you for your time.
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Andy |
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01-08-2005, 12:58 PM
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1969 Porsche 911 2.7 
