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  1. #1

    New rotax sc impeller 2010

    Hi people
    does any one tried the new rotax sc impeller model 2010

  2. #2
    i heard the boost is about 19/20 psi with this rotax sc impeller

  3. #3
    nini engineering's Avatar
    Join Date
    Jan 2009
    Croatia & Germany
    is that an 2010 model impeller, or only for the 2010 skis?
    "which diameter is it?"

  4. #4
    its a 137 mm 2010 impeller with a 3mm spacer

  5. #5
    danieletrono's Avatar
    Join Date
    Feb 2008
    San Benedetto del Tronto, Italy
    Hi are you talkig about rotax racing sc?
    There are two solution:
    -137 mm plus spcaer for offshore boat
    -140 mm for close course.

    Lemoine and fracasso has these in their official ski.
    Rotax racing doesn't give psi boost info.
    I do not know the real boost. Maybe malte knows the real boost... Mrracing.

    The 09 137 was similar to akit les cooke but more top speed instead of accelerarion.
    My 02

  6. #6
    heres the pix of the rotax 2010 impeller
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #7
    home of the dislexic fingers breon's Avatar
    Join Date
    Aug 2007
    port st lucie fl
    just a thought

    rotax is good but a 137 wheel and spacer..isnt going to give you 19 20 psi at any rpm you are going to be willing to run...without the risk of a connnecting rod violating you ...

    it is probably going to be comparible to a mini rude a riva wheel and spacer or et wheel and spacer...14 15 psi at 8600 rpm..

  8. #8
    R88ory RXP's Avatar
    Join Date
    Feb 2008
    Kent, England
    +1 if a rude 3 needs to be spun at 9000 to see 20psi there is no way that a 137 is going to make 20psi boost unless it was measured at the SC, Les has made a new SC and its supposed to make 20psi but at like 8500, h also measures at the SC tho and not in the mani.

    I guess in some respects it gives a better comparison as it negates any differences past the SC that could effect the boost numbers but when I talk about boost i wana know what the motor is getting. R88

  9. #9
    home of the dislexic fingers breon's Avatar
    Join Date
    Aug 2007
    port st lucie fl
    i agree you loose some in the intercooler piping ect...that is why i only see 16 ish on my rude 3...i should tap my charger and just see..

  10. #10
    so your guess is this rotax impeller as the same boost like a 2 rude.....ive a 2 rude and my boost is about 14,7 psi....i will see the diference between the 2
    the blades of the rotax and 2 rude are the same size in heigth.....

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