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  1. #1
    Yellow93's Avatar
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    Any gains from Iridium plugs?

    Are there any gains to be had from running the Iridium plugs? I have heard you don't have to J-gap them, so are they a bolt-on rpm gain?? Anyone have any before and after rpm numbers?


  2. #2
    I tested them against the stock plugs a long time ago and got no rpm gain. They did tend to run a little "cleaner".

  3. #3
    Pistonwash's Avatar
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    No.

  4. #4
    Chrisrokc's Avatar
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    I tried them and I didnt gain anything

  5. #5
    Hypertoys's Avatar
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    I have seen that they are safer when running lean .(they didn't melt as fast)

  6. #6
    ....back from the dead.... J-ME's Avatar
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    Yep, the gain was......didn't have to replace them once all season

  7. #7
    Old Ski Insanity w/rpm500's Avatar
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    newer findings is that you must run them at a higher gap to see improvements other than smoother running (warning:bend the ground electrode back,do not not force the gap wider with a gapping wedge tool) ..see my recent thread link posting in old school for further thoughts ..

    http://www.greenhulk.net/forums/show...formance-gains..


    link is from a ducati forum discusion on iridiums..
    just food for thought..

  8. #8

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    I try the Iridium plugs a long time ago didnt gain anything excpet didnt have to change out the plug so offen. your better off using the regular plug...

  9. #9
    Matt Hill's Avatar
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    Stick with a copper plug...

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