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  1. #1
    "just sayin".. jetdave56's Avatar
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    NGK sparkplugs for higher compression

    http://www.ngksparkplugs.com/product...x.asp?mode=nml always used the recommended spark plug ngk BR8ES-11 with normal wear( tan/ gray insl.) in stock form. A 15 hr set examined by mr. Horning confirms this, now that my compression is going to be 145-150 psi with slightly higher cyl. temp, would one of the high performance ngk plugs be better for performance and engine wear?


  2. #2
    Mike xsockguyx's Avatar
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    BR9ES-11 is what you want with a high compression head.

  3. #3
    Quote Originally Posted by xsockguyx View Post
    BR9ES-11 is what you want with a high compression head.
    accurate info? are you sure Mike?
    hmm, I`m not aware of BR9ES-11

    I`m sure he can just open up the gap on the 9`s, which is a colder plug...

    http://www.sparkplugs.com/results_cr...ES-11&x=38&y=9

  4. #4
    "just sayin".. jetdave56's Avatar
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    spark plug

    happy new year to all,now that our skis are a year older, i did some homework(search)maybe Rich (WFO)will elaborate on this, this was put out on 2 old threads , 150 compression 07 gpr/03gpr he recommends BR9ES,a "colder" spark plug,but the standard BR8ES-11 would work just as much,Andy i remember reading you used the iridium plugs, or has anybody else, do just last longer , burn off oil better,what about the NGK racing plugs?

  5. #5
    Quote Originally Posted by jetdave56 View Post
    happy new year to all,now that our skis are a year older, i did some homework(search)maybe Rich (WFO)will elaborate on this, this was put out on 2 old threads , 150 compression 07 gpr/03gpr he recommends BR9ES,a "colder" spark plug,but the standard BR8ES-11 would work just as much,Andy i remember reading you used the iridium plugs, or has anybody else, do just last longer , burn off oil better,what about the NGK racing plugs?
    I tried the iridium plugs, IMHO they suck in 2 stroke applications. I felt the plugs loading up easier when the ski`s is modified and the fuel is turned up using the EFI and using premix at 40:1...

    maybe it`s different for other folks, but during long no wake zones, it took a few more seconds to clear out before it would run clean and crisp...

    stick with NGK OEM type plugs...


    Iridiums do last much longer in 4 stroke applications...

    I am currently using the 8`s with no issues, plug color is spot on... no overheating...

  6. #6
    32 Valves To Love! Racecar_Dave's Avatar
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    I think you get the extra rpms from the iridiums that you would get from indexing the oem plugs, and I would assume they could work better, than the oems, in extreme heat.

  7. #7
    Moderator DrewNJ's Avatar
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    Dave, 8's or 9's will work fine with 145-150psi. Take your pick.
    There is no such thing as a BR9ES-11 plug so if you buy BR9ES plugs you will have to regap them.
    I have never had anything good to say about iridiums in 2-strokes. Nothing bad, just nothing good enough to say they are worth the extra coin... Personally, I'd stay with the BR8ES-11 and change them seasonally or as needed.
    Doug

  8. #8
    Mike xsockguyx's Avatar
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    Quote Originally Posted by AndyGPR View Post
    accurate info? are you sure Mike?
    hmm, I`m not aware of BR9ES-11

    I`m sure he can just open up the gap on the 9`s, which is a colder plug...

    http://www.sparkplugs.com/results_cr...ES-11&x=38&y=9
    Quote Originally Posted by DrewNJ View Post
    Dave, 8's or 9's will work fine with 145-150psi. Take your pick.
    There is no such thing as a BR9ES-11 plug so if you buy BR9ES plugs you will have to regap them.
    I have never had anything good to say about iridiums in 2-strokes. Nothing bad, just nothing good enough to say they are worth the extra coin... Personally, I'd stay with the BR8ES-11 and change them seasonally or as needed.
    Doug

    I guess there no BR9ES-11 spark plug? I stand corrected, but i do use BR9ES on mine.

  9. #9
    "just sayin".. jetdave56's Avatar
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    plugs

    i'll stay with the standard plug BR8ES-11 , i like to change them every 12-15 hrs which for me is 3 times a season, but will look at them closely to see if color/cond. is normal, thanks

  10. #10
    Mike xsockguyx's Avatar
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