Coil mod

[HobbyMan]

Well Ive been thinking again. Usually when that happens something gets destroyed. I was wondering if instead of replacing coil wires by splicing new ones inside the coil itself, why cant we just put two terminals on the outside of the coil so that we can replace the wires without splitting the coils again. I have plenty of old distributor caps that I could rob the terminals off of. What does everyone think? As long as I could get the proper resistance and properly seal the terminals against things like water intrusion I think it would work.

<--Hey, one post for every cc

[mason79]

brilliant

[pggg]

There'd be a lot more work to rig detachable leads, rubber caps etc... easy to do with resin/ epoxy, all sealed and done, you'd probably only need detachable leads if you were into sometimes changing spark lead colours or something, or if you don't want to change the leads when getting new coils, but you wouldn't be bothering to make a detachable stock XS11 coil if that was the case(getting new coils)

[Pat Kelly]

Probable less expensive and easier to use MikesXS.com coils. They are replaceable.
I put Dynacoils on my E and they are replaceable, but cast a bit more than MikesXS.

[HobbyMan]

are mike's xs coils drop in replacements?

[randy]

The XS coils are sealed, and if you do the wire replacement properly with a good epoxy, there's no reason they won't work indefinitely. I did mine back in '03 with copper core Accel wire and no problems in 20K miles. (insert crossed fingers here).

I believe that with Mikes XS coils, you need to do some bracket fabrication or turn them 90 degrees, check the MODS section

[HobbyMan]

Like you said, there is no reason that the coil shouldn't last indefinitely. (unless is cracks or breaks or something like that) Wires on the other hand do not last. That is why putting the terminal on the outside of the coil just like a distributor would allow you to replace your wires like your favorite car. The question is to me, is it worth it when you can just cut the coil and replace the wires when their time comes. he plug wires on my Dad's 79F are hard, really hard. They are no longer pliable at all. The other day one of the caps came off. I could just put it back on but if this becomes a normal occurrence because of bad wires I would rather replace the wires.

[randy]

Well, then, replace the wires. I doubt you'll have to replace them again sooner than 10-15 years??

[tommystinson]

NGK makes a waterproof compression splice kit for plug wires. You'd still have a very short length of the original wire right next to the coil, but that shouldn't cause any issues.

http://www.parkeryamaha.com/index.as...D&ProdID=17214

$20 for four, not a bad deal in my book.

[oldnortonrider]

The following is kind of a quick fix--temporary fix, that I did to get a little more life from a couple plug wires--a couple years ago that shoulda been replaced then :> I took the necessary length of plastic fuel line--split/cut the full length of the "new creative insulation" and then wrapped it around the plug wire; and then took several teeny-tiny zip ties and cinched up on the outside every 2-3 inches. Those wires are still working fine. My 7 1/2 gallon Concours gas tank hides my beautiful improvisational handiwork.

[TopCatGr58]

Hey Hobby,

I could be wrong, but I think the OEM coil/plug leads were insulated with mostly rubber, but possibly not much SILICONE in it? The new wires you can get now have silicone mixed in so that makes them much more durable and heat resistant, so that they will probably stay pliable for many many years, so doing the replacement wire fix on your dad's coils will probably be a ONE TIME thing, and less work than trying to afix terminals? JMHO

SO...just replace the wires with good silicone insulated ones, and leave plenty of slack for those 1/4" trimmings that may be needed every few years for the caps...IF you don't get them sealed well!
T.C.

[HobbyMan]

Marvelous. I did not know that today's wires were that much better. Looks like I will scratch this mod and just replace the wires. Thanks guys.