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Thread: Spark Plug Reading

  1. #1

    Default Spark Plug Reading

    I was looking at wide band 02 sensors and got involved in a discussion on
    another forum. In the discussion I learnt a bit about reading plugs so I
    decided search the net and complie as much information as I can on plugs.

    Installation 1 - Plug type

    Types of Spark Plugs
    We see advertisements everywhere trying to sell us different types of spark plugs that all look different but claim the same thing, better fuel economy and more power. These are the faces of those plugs.

    We start at the copper plug. The original spark plug.





    Copper is an excellent conductor of electricity but doesn't offer the life of most other plugs and needs changed every 15k miles. From what I've seen in my plug comparison photos of the plugs working under pressure, this plug doesn't offer any bigger spark than other metals with less conductivity.

    A few copper variants have hit our market, the Chinese didn't like the low lifespan of copper and they created a plug that I don't think ever made it to mass production but looks interesting enough.





    We've all seen the splitfire.






    Not many of us have seen the Halo plug though.






    Or the E3 plug.






    A few designs have taken the idea of getting a nice and open path to the combustion chamber just a little bit further.






    A company in Mexico makes(made) this Technica plug. I've been unable to find them for sale online.






    The Torquemaster Plug is available online at a few places. This type of plug uses the surface-gap discharge method. Surface-gap gets its benefits because the spark takes less voltage to travel a long distance over the surface of the plug then it does to go through the air. This gives you more spark exposure area.






    A surface-gap discharge plug that is also long life is the Bosch Platinum +2 and 4 plugs.






    Then you have your typical Platinum plug.






    And your Iridium.



    Finally, you have the Pulstar plug. This plug differs from the plugs above by incorporating a peaking capacitor into the plug.





    Source images and text dkjones from www.gassavers.org
    Apexmoto Inc - Dyno tuning, engine/chassis/suspension upgrades, repairs, shaken, tires & changing with balancing, graphics printing, stickers, media blasting, painting & powder coating.

  2. #2

    Default

    Installation 2 - Plug Temperature


    Plugs come in different heat ratings, usually referred to as a hot plug
    medium plug or a cold plug. The hot plug runs hotter due to a longer
    electrode/insulator which results in less heat transfer ie hotted at the tip.
    Plugs are designed to operate between 400c and 850c and above 900c
    the plug can ignite the mixture without an electrical input. So it is
    important to have the correct plug for the application.

    The following images explain.............


    Source: Online Mopar magazine ( need to find the link )


    Source: NGK web site.
    Apexmoto Inc - Dyno tuning, engine/chassis/suspension upgrades, repairs, shaken, tires & changing with balancing, graphics printing, stickers, media blasting, painting & powder coating.

  3. #3

    Default

    This thread is locked until I finish. Then comments can be added or amendments
    suggested, questions asked etc.
    Apexmoto Inc - Dyno tuning, engine/chassis/suspension upgrades, repairs, shaken, tires & changing with balancing, graphics printing, stickers, media blasting, painting & powder coating.

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