sparkplug heat range

Discussion in 'Technical' started by Blue Brick, Sep 18, 2012.

  1. Blue Brick

    Blue Brick Member

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    How do you identify the heat range for a sparkplug? Thanks!
     
    Last edited: Sep 18, 2012
    Blue Brick, Sep 18, 2012
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  2. Krazy Comet

    Krazy Comet Tom

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    Are you trying to determine the heat range of plugs you already have??? Generally the number indicates a hotter plug by using a larger number, a Motorcraft BF82 is a hotter plug than BF42, by the same token a Champion F-11Y is colder than a F-14Y...

    There are numerous guides on the net explaining differences in heat range but generally the the electrode and insulator will be thinner/smaller on a hot plug vs cold...
     
    Krazy Comet, Sep 18, 2012
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  3. Blue Brick

    Blue Brick Member

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    Thanks....
     
    Blue Brick, Sep 20, 2012
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  4. 74merc

    74merc computer nerd

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    Not *quite* hijacking this, but when would you want to go hotter or colder with the plugs?

    I've heard a lot of round-a-bout answers, nothing that ever made sense.

    Colder plugs if you detonate?
     
    74merc, Sep 20, 2012
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