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  1. #1
    masta2000's Avatar
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    stage 3, are these plugs fine?

    there is no mention of changing the spark plugs on the rxp on a stage 3 kit but my mechanic warned me to only use denso ixu27 plugs or else the machine might blow. the reason being that they run at higher temp.
    i hadnt installed the lower temp thermostat and this is what my stock plugs look like, do they look lean?

    these are pics of the same plug, just under different lighting.

    my machine runs really hot but no warnings, and eventually after a while runs like tchit. 60 hours on stock plugs. i just installed the low temps thermostat and installed new plugs while i wait for the denso ones.
    is my motor in danger?
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  2. #2
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    Run the IXU27...I know I do...Last a lot longer...

  3. #3

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    I have just replaced my plugs,as my ski was running lumpy and chitey,with my mods i guess im stage 3,the plugs i was running were normal plugs and they lasted a bit less than yours......new plugs its fine,im interested in knowing about the denso option as im unsure as you are about stock plugs

  4. #4
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    If you are stage 3 you should be running the ixu27...if running just stage 1 or stock the ixu24's are fine...

  5. #5
    BLACK MAGIC HEADERS hydrojunkie's Avatar
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    Quote Originally Posted by masta2000 View Post
    there is no mention of changing the spark plugs on the rxp on a stage 3 kit but my mechanic warned me to only use denso ixu27 plugs or else the machine might blow. the reason being that they run at higher temp.
    i hadnt installed the lower temp thermostat and this is what my stock plugs look like, do they look lean?

    these are pics of the same plug, just under different lighting.

    my machine runs really hot but no warnings, and eventually after a while runs like tchit. 60 hours on stock plugs. i just installed the low temps thermostat and installed new plugs while i wait for the denso ones.
    is my motor in danger?
    they look good

  6. #6
    masta2000's Avatar
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    thanks for the info. i just wish i knew more about the spark plugs, maybe someone can do a write-up about it?
    also does the stage3 without ecu lean out the machine in any way?

  7. #7
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    Stage 3 charger MUST have bigger injectors definitely...

  8. #8
    masta2000's Avatar
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    i'm running 42s as it comes with the kit. the confusion seems to be around a combination of :
    -RRFPR
    -injector size
    -spark plugs
    -low temp thermostat

    at which point to use these items and which combination. basically the idea is to have a day to day machine with the most possible reliability.

    from what i could gather the Riva kits with complete components are the most reliable possible combinations which is why i chose to go for the Stage3 kit minus the ecu and valve springs to put the less amount of strain on the engine while maximizing bolt-ons.

    the only thing, like i said in my first post, is which spark plug to use and do the stock ones do the trick? at high engine temp i seem to be having pre-detonation because the porcelaine on the back is burnt and after a long day it runs like tchit.
    although i hadnt installed the lower temp thermostat, i just did with new plugs(stock) and we'll see how it goes

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