Resistive Plugs and Caps

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rd84
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Resistive Plugs and Caps

#1 Post by rd84 » Tue Oct 13, 2015 12:34 pm

Hi,

I've bought an aftermarket CDI ECU - the instructions say that I must use resistive plugs and caps.

Is the NGK BR9HS a resistive plug ? - can anyone recommend which NGK plug cap I should be looking for ?

BTW - what is a resistive plug - what does it mean ?

Many thanks.

Regards
Paul

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Vonzipper
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Re: Resistive Plugs and Caps

#2 Post by Vonzipper » Tue Oct 13, 2015 2:57 pm

The plug caps should have a resistor element built inside which can be measured with a mulimeter at around 5-6 K ohms. The plugs are what they are. They specify resistive plugs and caps to prevent RFI interference with the sensitive electronics near by.

Bengt Weil
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Re: Resistive Plugs and Caps

#3 Post by Bengt Weil » Tue Oct 13, 2015 4:06 pm

Regarding your NGK plug question - yes, they are resistor type.

In the plug designation, the "R" denotes resistor type (BR9HS), whereas a B9HS plus is a non-resistor type.

rd84
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Re: Resistive Plugs and Caps

#4 Post by rd84 » Tue Oct 13, 2015 8:07 pm

Thank you both for the information.

Cheers
Paul

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