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  1. #1
    SLASHER's Avatar
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    Rotax Racing 137mm impeller with Spacer any specs ???

    Has any one got any specs on this wheel ???

    Jerry any info ???


  2. #2
    boost junkie skidoochris's Avatar
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    I bet its close to a ET 137 wheel
    Last edited by skidoochris; 10-12-2014 at 06:04 PM.

  3. #3
    Quote Originally Posted by skidoochris View Post
    I bet its just a ET 137 with a riva sticker
    Why would Rotax Racing add a Riva sticker, looks nothing like a ET wheel.

  4. #4
    ricky86's Avatar
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    Quote Originally Posted by skidoochris View Post
    I bet its just a ET 137 with a riva sticker
    he's asking about the ROTAX RACING impeller not the RIVA impeller

  5. #5
    ricky86's Avatar
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    according the rotax racing parts list the impeller is 137 mm + 2 mm. in this thread http://www.greenhulk.net/forums/show...t=59379&page=4 they say the ROTAX has a boost output of 15,6 psi @ 8800 rpm. this is a thread from 2010 so don't know if it is still accurate.

  6. #6
    Kosh's Avatar
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    Quote Originally Posted by SLASHER View Post
    Has any one got any specs on this wheel ???

    Jerry any info ???
    Send it to me and I'll test it out

    You won't miss it amongst your 15 other chargers!


  7. #7
    SLASHER's Avatar
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    Quote Originally Posted by Kosh View Post
    Quote Originally Posted by SLASHER View Post
    Has any one got any specs on this wheel ???

    Jerry any info ???
    Send it to me and I'll test it out

    You won't miss it amongst your 15 other chargers!
    where did u get 15 from , it more like 20 ... Lol

  8. #8
    koftis's Avatar
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    Quote Originally Posted by ricky86 View Post
    according the rotax racing parts list the impeller is 137 mm + 2 mm. in this thread http://www.greenhulk.net/forums/show...t=59379&page=4 they say the ROTAX has a boost output of 15,6 psi @ 8800 rpm. this is a thread from 2010 so don't know if it is still accurate.
    I use the rotax racing impeller 137mm in a watercooled housing but the spacer is 3mm. It has more blades than the et but i dont know hoe "high" the blades are in the et. According to et company they are higher. Thats why they use a 4 mm spacer and rotax has a 3 mm one. The boost is very close but from what i have been informed the et due to the 4 mm spacer is a little bit better. Thats why i am thinking of selling my RR impeller for an ET one.

  9. #9
    Site Admin Green Hulk's Avatar
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    the Rotax upgrade doesn't even come close to the ET 137 +4. In fact, I took the Rotax out of my store as it made no sense to sell that to anyone when the ET out performs it and does so at lower cost.

  10. #10
    koftis's Avatar
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    around 15-16 pouns of boost. I have one for sale. The second version though with the spider web desing in the back and with the many blades. if you are interested pm me. Its a massive impeller and it gives you the advantage of less maintance regarding to a bigger 140 or 145.
    Click image for larger version. 

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