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Thread: Testing a coil

  1. 09-15-2021, 06:12 AM #11
    ptrsbtrs
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    I love the simple, yet extra important lessons I learn here.
    Thanks everyone that is willing to help us improve our (cars) and our lot in life!
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  2. 09-15-2021, 06:33 AM #12
    mathieulecomte
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    Very interesting - I am guessing the specs may different if testing a 912/356 coil vs a 911?
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  3. 09-15-2021, 10:04 PM #13
    pocketscience
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    Quote Originally Posted by mathieulecomte View Post
    Very interesting - I am guessing the specs may different if testing a 912/356 coil vs a 911?
    Don't know much about 912/356's sorry. However any ignition coil should have a similar configuration with a very low reading on the primary - around the 1 ohm mark or thereabouts, and a very high reading on the secondary - thousands of ohms.
    '95 993 | '70 911T
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  4. 09-17-2021, 05:21 AM #14
    Bridgeguy
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    Quote Originally Posted by mathieulecomte View Post
    Very interesting - I am guessing the specs may different if testing a 912/356 coil vs a 911?
    912/356/pre CDI 911 coil operates like a traditional coil.

    Coils for CDI cars are, in fact, step up transformers.

    You can use a CDI coil on early cars in a pinch but an early coil should not be used on CDI cars.
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  5. 09-30-2021, 03:15 AM #15
    zenithblue71T
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    Quick update. 911-hzk.de said the measurements I provided above on my coil are within spec.
    James Hurst #1638
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    911T with 2.2S Ps and Cs, Solex grind Cams and PMO 40mm
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  6. 10-01-2021, 10:36 PM #16
    pocketscience
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    You said 165 on the secondary, did you mean 165K?
    '95 993 | '70 911T
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