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  1. #1
    My new toys at work bruinsrme's Avatar
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    Riva vs Rotax ECUs

    Beside the price what are the major differences or advantages between the Rotax and the Riva ECUs.


  2. #2
    HORSEPOWER JUNKIE 9secZO6's Avatar
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    my take on it as of now is the rotax makes more power, but the riva has knock control that is needed for high-boost applications. The riva requires dealer activation killing the warranty, the rotax does not. The riva is mapped for 50# inj., the rotax stock injectors.....hope that helps
    Last edited by Green Hulk; 05-03-2008 at 08:36 PM.

  3. #3
    My new toys at work bruinsrme's Avatar
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    hmm interesting...Do yyou know if the Riva requires any rewiring?

  4. #4
    The ski's have taken a "backseat" to the Corvette DarthAWM's Avatar
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    Quote Originally Posted by bruinsrme View Post
    hmm interesting...Do yyou know if the Riva requires any rewiring?
    I don't believe so, other than BUDS activation and 50#'s it plug and play

  5. #5
    MIARider's Avatar
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    like 9 said. it mainly comes down to the RIVA is safer to run because it pulls timing when it detects knocking. The Rotax might make slightly better numbers but not worth the safety of the RIVA.

  6. #6
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by bruinsrme View Post
    hmm interesting...Do yyou know if the Riva requires any rewiring?
    No rewiring at all.

    Riva ECU also maintains all the fail safes of the stock ECU as well as maintain knock control.

    I use a Riva ECU on my turbo RXP and love it.

    Stickem is putting together a turbo RXP right now with Riva ECU and hit 88.1 mph on it on Friday.

  7. #7
    What kinda boost numbers do you gotta be pushing to get any knocking?

  8. #8
    HORSEPOWER JUNKIE 9secZO6's Avatar
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    Quote Originally Posted by VaRedneck View Post
    What kinda boost numbers do you gotta be pushing to get any knocking?
    Depends on fuel too, but I would suspect 12-13psi on 93 octane b4 u start to get into trouble, much more (20) if using the riva, as it will retard when it hears detonation. Aftermarket units can be programmed to dump the timing into the toilet in the presence of high boost. I am sure Frank or Dan could tell u much more about the limitations, as I am not trying to kill myself anytime soon

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