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  1. #1

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    Best Spark Plugs?

    What are the best spark plugs to use on a 2004 gtx sc limited? can i expect any gains in power or response? I am fully stock right now but in the near future hopefully will be getting a bunch of stuff all at once which includes:
    Rotax racing stage 3
    thruhull exhaust
    vortech sc impeller
    custom 4" intake ( anyone know where to get on or how to make?)
    OPAS Black offs ( going on in a couple of weeks before the rest)
    piggyback controller(where to get)
    Bigger injecotrs (where to get and which ones?)
    forged pistons
    RXT Drive shaft, stainless wear ring, and new solas prop
    and mybe if i can come up with anouther grand get the heads ported and polished.

    so which spark plugs to go with for right now and which ones to go with when i get the new stuff? thanks!


  2. #2
    Site Admin Green Hulk's Avatar
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    The Rotax Racing Stage 3 does include port and polish of the heads.

    You want the Denso Iridium IXU27 spark plugs.

    Nils (nils88 has the hookup on the fuel controller, bigger injectors and pistons.

  3. #3

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    nice! thanks hulk you've helped me so much,and im sure you think Im retarded because i have bounced back and forth between so much, but I greatly appreciate your help! and what i listed is what i am going to go with. What is Nils website or email?

    also are the Densos for now and when i get the new stuff?

    thanks agian

  4. #4
    Site Admin Green Hulk's Avatar
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    No problem, glad to help!

    Those denso's will work for you now and when you are modded.

    Nils phone number to his shop is 805-495-3832

  5. #5

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    and just on a side note what mph can i expect from all of the mods i listed?

  6. #6
    Site Admin Green Hulk's Avatar
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    It's hard to say as there are too many variables such as water/air temp in your riding area, hull variations, etc.

    Its safe to say that with some tuning you should see 77+ with insane acceleration.

  7. #7

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    would I still be good for 77+ with out getting bigger injectors and a piggyback module? would it still be good with the vortech sc impeller and the intake, and not run too lean with the rotax racing ecu? or will the rr ecu compensate for the extra air and add more fuel?

  8. #8
    Red Devil's Avatar
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    Quote Originally Posted by Totallyblown
    would I still be good for 77+ with out getting bigger injectors and a piggyback module? would it still be good with the vortech sc impeller and the intake, and not run too lean with the rotax racing ecu? or will the rr ecu compensate for the extra air and add more fuel?
    You get your doo going 77 +, you let me know cause I wanna see it...

  9. #9
    Moderator Franko's Avatar
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    With the RR ECU, you have no worries about air intake. Gobble as much air as you can get.

  10. #10

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    ight Red, i will let you know when it happens! I was looking at all of the stuff you did and just decided to go with the rr stage 3...by the way how is the RXT drive? Did you gain any speed? I was thinking about also doing this to mine...

    thanks Franko, just wanted to clear that up...

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