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  1. #1

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    B Kit vs Riva's Pro Series Superchager

    Among my list of planned upgrades, I am considering doing the supercharger. Besides the supercharger options mentioned above, I remember reading a thread where Shibby recommended sending the OEM supercharger to Jerry, for him to work his magic, as an alternative. Can anyone shed some light on the pros and cons of these options? Thanks in advanced


  2. #2

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    Go bolt on Riva (new product). Should be avail pretty soon.

  3. #3
    Site Admin Green Hulk's Avatar
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    The RIVA supercharger is available right now.

    I have run it with 42# injectors with both a stock and RR ECU and air fuel ratio was perfect. Huge performance gain!

    With the B kit you will need to use 50# injectors and a piggy back fuel controller. Performance gain is tremendous, but so is price.

  4. #4
    Jerry, did they put a new impeller in the RIVA SC or are they still using the old vortech impeller? How would the RIVA SC be with the RR impeller?

  5. #5
    Site Admin Green Hulk's Avatar
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    The Riva stage 3 SC is a modified front housing and a new impeller. The front housing is machined to fit the stage 3 impeller only.

  6. #6
    So is the RIVA SC a better setup than the stock housing with the RR impeller and 42# injectors?

    What are all the boost numbers and hp gains for the following setups:
    stock-?
    vortech impeller-?
    RR impeller-?
    RIVA S3 SC-?
    B Kit-?

  7. #7
    Site Admin Green Hulk's Avatar
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    Yep, the RIVA is second best with the B kit at #1

    I can't answer your questions on exact boost readings because that will vary by which ECU you use, which intercooler and the elevation in your riding area, but you have them listed in the correct order.

  8. #8

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    The S3 from Riva already has the 50# injectors. With Riva's new boost sensitive ECU, is the piggy back fuel controller still needed?

  9. #9
    Site Admin Green Hulk's Avatar
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    Yes, the complete stage 3 package does include the injectors, but those wanting to buy just the stage 3 supercharger can. This supercharger can be run with either a stock ECU or Rotax Racing ECU with the addition of 42# injectors. You can also run it with Riva's boost sensitive ECU. The Riva ECU is mapped for 50# injectors so you must run them when using that ECU.
    You can also run the Riva ECU with a B kit with no fuel controller as it's boost sensitive.

  10. #10

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    Thanks Jerry.

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