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  1. #1

    ROTAX RACING ECU vr 50 INJECTOR

    I Would Like To Know If Can I Used Riva #50 Injector With A Rotax Racing Ecu??


  2. #2

    Jerry - Please Help

    I don't think so my friend. I'm no expert, however Jerry told me that 50lb injectors should be used with Riva ECU and 60lb inectors with Rotax Racing Mgmt System.

    Might want to consult with him - he may know a few tricks to get by.

    Regards

  3. #3
    speedskixp's Avatar
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    Quote Originally Posted by douglasb76 View Post
    I Would Like To Know If Can I Used Riva #50 Injector With A Rotax Racing Ecu??
    What year is your ski?

  4. #4
    My it's a RXP 2005




    Quote Originally Posted by speedskixp View Post
    What year is your ski?

  5. #5

    ecu

    http://greenhulk.net/forums/showthread.php?t=16773



    There are a couple of aftermarket ECU's available to us. The Riva ECU and the Rotax Racing ECU. The important thing to remember is the Riva ECU is mapped to work with 50# injectors. (stock injectors are 38#) The Rotax Racing ECU can be run with the stock injectors, or larger 42# injectors if running a higher boost supercharger. (more on this later)
    Both the Riva and Rotax Racing ECU's have a higher rev limit of 8650 RPM's. With either ECU you must upgrade your valvetrain to handle the higher RPM's to prevent valve float. The valvetrain upgrade Riva offers in their Stage 3 kit consists of higher rate springs, a shim that goes under the spring and also lightweight titanium valve spring retainers. This valvetrain kit is effective and easy to install without removing the head using Riva's valvetrain tool. Rotax Racing offers lightweight aluminum valve spring retainers and spring shims, but it is advised that if you plan on running 8500+ RPM's with the Rotax Racing retainers/shims that you also have the valves lightened. This requires head removal. It is also advised by Rotax Racing that the aluminum retainers be inspected and replaced if necessary after every 25 hours of use.

  6. #6
    speedskixp's Avatar
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    i would say the 50 lbs would be fine because the older rr ecu's were not set up for a certain size injector. We have a ski with the rr ecu and are running 48lbs in conjuction with a rrfpr. You will need an rrfpr though to run the 50 lbs. The newer rr ecu is mapped for 60 lb injectors from what I have read.

  7. #7

    +1

    Quote Originally Posted by speedskixp View Post
    i would say the 50 lbs would be fine because the older rr ecu's were not set up for a certain size injector. We have a ski with the rr ecu and are running 48lbs in conjuction with a rrfpr. You will need an rrfpr though to run the 50 lbs. The newer rr ecu is mapped for 60 lb injectors from what I have read.

    rrfpr and and a air fuel meter ..........

  8. #8
    speedskixp's Avatar
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    Quote Originally Posted by DIGGS View Post

    rrfpr and and a air fuel meter ..........
    Air fuel meter for sure. I forgot to mention that.

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    Knock sensor?

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    SOME PEOPLE LIKE THE BROKE PISTON KNOCK SENSOR TODD

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