Miata Mailing List: October 1997, Message #82
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From: 	Gary Fischman <miata@eunos.com>

Subject: Re: Magnacore Plug Wires

Date: 	Wed, 1 Oct 1997 10:28:22 +0000



At 10:15 AM 10/1/97 +0000, Ric Allan wrote:

>1) They infer that their wires should last the lifetime of the engine =

>(assume the 8.5 wires), fact or fiction?

>2) If fiction (they  do refer to the Miata engine as a special case), =

>what lifespan should I plan for (in other words, when should I have a =

>spare set ready)?



I'm no expert, but here's my take. The *wires* aren't the weak link in the

Miata. Its the insulation that covers the wires. I believe the insulation

breaks down due to the extreme conditions inside the spark plug wells. So

an ohm-meter still shows the wires to be good, but the dielectric

withstanding voltage of the insulation is reduced.



Just my theory.  Never verified. FWIW.





--

	Gary Fischman

	MFWIC@Miata.net