What's the difference between resistored spark plug with non-resistor one ?

Discussion in '60-Series Wagons' started by schaats, Nov 9, 2005.

  1. schaats

    schaats

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    Hi,
    I have a question about spark plug.
    OEM spark plug for my carb. 3F is Nippon Denso W14EX-U. It's non-resistor type, I heard.
    But OEM plug for US 2F motor is W14EX-RU.
    The letter R means resistor.
    I'd compared those two type of plugs before (W14EX-U, W14EX-RU) but I couldn't catch any dfference when driving.
    What are differences between resistor type with non-resistor type ?

    Thank you,

    Oh, Min Seok
     
  2. dfmorse

    dfmorse

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    Schaats;

    In a nut shell, a resistor plug presents a dampening to the high voltage impulse when the plug fires. This helps reduce RFI (Radio Frequency Interference). The resistor plug won't affect drivablity or engine performance very much.

    The non-resistor type plug will allow an increase in RFI.

    ...
     
  3. WckedMidas

    WckedMidas

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    RFI is that whineing sound you get threw you radio from poor electrical conections and cheap plug wires
     
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