Spark Plug wire cap resistors?
#1
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Im going to be making some spark plug wire for some AEM ignition coils i will be fitting. Something i wondered, do modern ignition systems use the ceramic resistor that can be found in plugs caps to stop interference? The reason i ask is id like to use an ngk plug cap but i know these have a resistor built in. I didnt want to fit them for the resistor to cause issues.
Like this:
![](https://www.miataturbo.net/attachments/engine-performance-56/80186-spark-plug-wire-cap-resistors-54426329-9bfa-4f20-ab1b-430d0d7c46f2.jpg?dateline=1371838753)
The plugs im planning on using are these, if it makes a difference:
Flyin' Miata : Engine/Drivetrain : Fuel and Ignition : NGK race spark plugs
Thanks
Mike
Like this:
![](https://www.miataturbo.net/attachments/engine-performance-56/80186-spark-plug-wire-cap-resistors-54426329-9bfa-4f20-ab1b-430d0d7c46f2.jpg?dateline=1371838753)
The plugs im planning on using are these, if it makes a difference:
Flyin' Miata : Engine/Drivetrain : Fuel and Ignition : NGK race spark plugs
Thanks
Mike
#3
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I run resistorless plugs on regular wires. No issues.
FYI those plugs are less than $3 each.
http://www.summitracing.com/parts/ngk-4091
edit: I should also mention that I run LS2 truck coils and they had a much bigger effect on my spark than spark plug and spark wire choice.
FYI those plugs are less than $3 each.
http://www.summitracing.com/parts/ngk-4091
edit: I should also mention that I run LS2 truck coils and they had a much bigger effect on my spark than spark plug and spark wire choice.
#4
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I run resistorless plugs on regular wires. No issues.
FYI those plugs are less than $3 each.
http://www.summitracing.com/parts/ngk-4091
FYI those plugs are less than $3 each.
http://www.summitracing.com/parts/ngk-4091
Thanks guys, the link was just the quickest one i could find, i wouldn't be getting them from FM.
If i was using normal plugs would the 5ohm ceramic resistor in the plug caps cause issues, or would i be better off just using some normal boots?
Mike
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