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  1. #1
    Live Fast wave15stx's Avatar
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    15f spark plug question

    i usually run the standard cr9ek plugs in my ski i noticed the dealer gave me cr8ek plugs is there a difference?


  2. #2
    dawson's Avatar
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    the 8 is a hotter plug

  3. #3
    how much of a performance difference could you see with this hotter plug or another brand of better plugs?

  4. #4
    Live Fast wave15stx's Avatar
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    Quote Originally Posted by dawson View Post
    the 8 is a hotter plug
    what do u mean by a hotter plug?

  5. #5
    madtown_chris's Avatar
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    Let's make this really simple: when you need your engine to run a little cooler, run a colder plug. When you need your engine to run a little hotter, run a hotter spark plug. However, NGK strongly cautions people that going to a hotter spark plug can sometimes mask a serious symptom of another problem that can lead to engine damage. Be very careful with heat ranges. Seek professional guidance if you are unsure.

    With modified engines (those engines that have increased their compression) more heat is a by-product of the added power that normally comes with increased compression. In short, select one heat range colder for every 75-100 hp you add, or when you significantly raise compression.

    Also remember to retard the timing a little and to increase fuel enrichment and octane. These tips are critical when adding forced induction (turbos, superchargers or nitrous kits), and failure to address ALL of these areas
    will virtually guarantee engine damage. An engine that has poor oil control can sometimes mask the symptom temporarily by running a slightly hotter spark plug. While this is a "Band-Aid" approach, it is one of the only examples of when and why one would select a hotter spark plug.

  6. #6
    dreww's Avatar
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    Quote Originally Posted by madtown_chris View Post
    Let's make this really simple: when you need your engine to run a little cooler, run a colder plug. When you need your engine to run a little hotter, run a hotter spark plug. However, NGK strongly cautions people that going to a hotter spark plug can sometimes mask a serious symptom of another problem that can lead to engine damage. Be very careful with heat ranges. Seek professional guidance if you are unsure.

    With modified engines (those engines that have increased their compression) more heat is a by-product of the added power that normally comes with increased compression. In short, select one heat range colder for every 75-100 hp you add, or when you significantly raise compression.

    Also remember to retard the timing a little and to increase fuel enrichment and octane. These tips are critical when adding forced induction (turbos, superchargers or nitrous kits), and failure to address ALL of these areas
    will virtually guarantee engine damage. An engine that has poor oil control can sometimes mask the symptom temporarily by running a slightly hotter spark plug. While this is a "Band-Aid" approach, it is one of the only examples of when and why one would select a hotter spark plug.
    well said

  7. #7
    Live Fast wave15stx's Avatar
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    Quote Originally Posted by madtown_chris View Post
    Let's make this really simple: when you need your engine to run a little cooler, run a colder plug. When you need your engine to run a little hotter, run a hotter spark plug. However, NGK strongly cautions people that going to a hotter spark plug can sometimes mask a serious symptom of another problem that can lead to engine damage. Be very careful with heat ranges. Seek professional guidance if you are unsure.

    With modified engines (those engines that have increased their compression) more heat is a by-product of the added power that normally comes with increased compression. In short, select one heat range colder for every 75-100 hp you add, or when you significantly raise compression.

    Also remember to retard the timing a little and to increase fuel enrichment and octane. These tips are critical when adding forced induction (turbos, superchargers or nitrous kits), and failure to address ALL of these areas
    will virtually guarantee engine damage. An engine that has poor oil control can sometimes mask the symptom temporarily by running a slightly hotter spark plug. While this is a "Band-Aid" approach, it is one of the only examples of when and why one would select a hotter spark plug.

    thanks for all the info.

  8. #8

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    well said chris.... my fingers wouldn't have lasted that long

  9. #9
    jtskir15f's Avatar
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    i'm running the CR9EIX from NGK. its a replacement for the stock plug but it's from the "PREMIUM" class. it's got an iridium core and it's said to transfer more energy so it provides a better spark.

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