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  1. #1
    rx4pain's Avatar
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    Belt driven SC question

    Anyone know of when, how much and most importantly if the Vortech SC will work in it?


  2. #2
    Site Admin Green Hulk's Avatar
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    When? I will possibly have a prototype in my RXP in late August.

    How much? TBD

    It will have its own SC Impeller. It will also have interchangeable top pullys for higher boost.

    Nils888 may chime in on this thread and offer more info

  3. #3
    oooooooooo,interchangeable pulleys!!!

    There are TWO things in life a man can never have to much of........
    One of them is HORSEPOWER.

  4. #4
    any hint as to cost?

    Hopefully not as bad as the 15f unit riva sells

  5. #5

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    Quote Originally Posted by Thomas
    any hint as to cost?

    Hopefully not as bad as the 15f unit riva sells
    Lets hope not.

  6. #6
    Site Admin Green Hulk's Avatar
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    I have no idea what final pricing will be.

  7. #7
    Vern's Avatar
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    So the new setup will use a completely different supercharger - our stock one will not be used? I would think there would be a relatively BIG market among RXP/RXT owners if someone came up with a mounting plate and belt drive system that could re-use the stock supercharger but with the belt drive.

    Another thought ... our supercharger shafts are turning HUGE rpms (not sure how much, is the step up ratio 4:1?), probably somewhere around 35,000+ rpms at full throttle. At that speed, all the little 'shit' on the shaft (shims, washers, ceramic clutches) is also rotating at insane speeds. In some ways, I am surprised that BRP came up with this design ... and that more clutches are not failing. At that rotational speed, the centrifugal forces on the the little parts on the shaft is large ... no wonder the ceramic sometimes shatters when it is engaged and slips on the shaft at those rpms. Just a bizarre thought that any little ceramic 'slip discs' could function and not disintegrate after awhile. No excuses for a bad design IMO, just something I have been thinking about.

  8. #8
    Site Admin Green Hulk's Avatar
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    The belt driven SC will utilize a completely different supercharger capable of flowing MUCH more air. It will have higher boost capabilities with different top pullys, but you will need race fuel.

    The pump gas setup will make slightly more boost than stock, but flow TONS more air. Higher boost does not necessarily mean more power as the higher the boost the more heat is produced which robs power.

    The belt driven SC will utilize your existing external intercooler whether it is a Riva/Vortech, or Rotax Racing unit.

  9. #9
    lol, sounds like it will need an aftermarket ecu, boost controller, new injectors, and so on....


    I just hope they keep the price within reach of the "average joe" instead of race only applications like the riva/vortec 15f unit.

  10. #10
    Site Admin Green Hulk's Avatar
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    You will need the Rotax Racing ECU along with a piggyback fuel controller and bigger injectors.

    This is not going to be a cheap alternative to replacing your stock supercharger. On the other hand, i don't forsee it being as expensive as the Riva unit.

    Oh, it will also come with a coupled driveshaft that is much stronger than stock. Again, not nearly as expensive as the Rotax Racing coupled driveshaft.

    This is going to be a very, very good thing guys!

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