Coil diameters

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Brad Ripley
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Coil diameters

#1 Post by Brad Ripley »

Question -- Modern ignition coils are (I believe) are 55 mm diameter. What is the diameter of older coils? about 63 mm maybe ?

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Jon Schmid
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Re: Coil diameters

#2 Post by Jon Schmid »

Hi Brad, please define "older." My 356C coil is 55.6 mm FWIW.
Thanks---

Jon Bunin
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Re: Coil diameters

#3 Post by Jon Bunin »

Brad Ripley wrote: Thu Aug 18, 2022 1:07 pm Question -- Modern ignition coils are (I believe) are 55 mm diameter. What is the diameter of older coils? about 63 mm maybe ?
Brad, measured in several places, a '59 TK6A3 is just over 60 mm.
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Brad Ripley
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Re: Coil diameters

#4 Post by Brad Ripley »

Jon, Thanks for measuring one of the old coils, just over 60 mm -- which the reason why old coil clamps are too large for "modern" 55 mm dia. coils. BTW, many modern coils don't come with clamps so some sort of shim must be used with the early larger clamp.

Jon Bunin
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Re: Coil diameters

#5 Post by Jon Bunin »

Brad, here's another TK6A3 from 1952 (9H)...
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Steve Douglas
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Re: Coil diameters

#6 Post by Steve Douglas »

For the newer coils there are some brackets for $3. https://socalautoparts.com/wp-content/u ... 905251.jpg

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