Spark plug boots

[Parksy]

Hi all

I've got an idea for making some spark plug boots, starting with a brass cap and the lead soldiered to the cap. Then heatshrink over the lead/cap and insulator.

I was just wondering if there's anything I need to know regarding the leads. Specific grade of wire, insulation thickness, etc?

Also wondering how everyone else makes their spark plug leads?

Cheers

Andy

 

[GailInNM]

For the wire leads, many people, including me, use test lead wire such as is used on electronic test meters. It comes in a lot os sizes and diameters from verr thin to quite thick. For my small engines I normally use #28 which is the thinnest available with out problems. Spark ignition voltages exceed it's rated insulation voltage but I have had no problems. It has a very soft insulation so it flexes easily. It also has a large number of very fine wires in the core so it does not break with vibration.

About 5 yers ago I wrote a tutorial on molding boots by transfer molding. You might like to look at it.

http://www.homemodelenginemachinist.com/showthread.php?t=14539&highlight=molding+sparkplug+boot

Gail in NM

 

[Parksy]

This is perfect! Thanks for posting Gail.

 

[XD351]

I have used the spark ignition wire from an electric stove and it worked ok but may be a little thick for the scale of some smaller engines .

 

[BobsModels]

Andy

Lately I have been using this silicone HV wire from S/S Machine here is link, the wire is on the right side and close to the top. I use the 10KV and have used the 5KV for one application. He has lots of stuff for ignition component's including some really nice small spark plug clips.


http://www.cncengines.com/orderpage.html

No affiliation just a happy customer, I use his CDI ignitions on several of my engines.


Bob