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  1. #1

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    Difference between RR Race EDU and Stock class ECU

    Can someone please tell me what the difference is between the two ECU'S from Rotax


  2. #2
    Site Admin Green Hulk's Avatar
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    8600 RPM rev limit on Race ECU
    8500 Rev limit on stock class ECU
    Stock Class ECU is legal for those racing in "Stock Class" racing.

    Both have more aggressive timing/fuel curves over stock ECU's.

  3. #3
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    What else does the stock class ECU do for speed and acceleration Jerry? Im kinda being bit by the speed bug

    What improvements will I see from my current setup? Top speeds?

    Sorry to hijack the thread!

  4. #4
    Site Admin Green Hulk's Avatar
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    The stock class, just like the Race ECU will deliver much better acceleration as well as top speed.

    The stock class ECU is probably a better choice to those who dont wish to do head work, lightened valves.

    There are many here running the stock class ECU so maybe they will offer some input.

    Also, i have a customer in Puerto Rico running the stock class and he's doing 80+ in the heat

  5. #5
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    I will need another re-pitch right?

  6. #6
    Mrs. Roboto Bayou Princess's Avatar
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    you sure will.

  7. #7

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    Thumbs up

    Quote Originally Posted by Green Hulk

    Also, i have a customer in Puerto Rico running the stock class and he's doing 80+ in the heat
    And another customer from P.R. also running 73 MPH in the heat with a stage II RXT and maybe 75 MPH this same week since my taller 14/19R prop with the "Green Hulk was here" job show up in the mail today

    Stock class RR (4502) ECU = more acceleration, midrange and top end speed with the (right pitch)

    Ray

  8. #8
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    Hey Ray any of your friends have any that are not in use?

  9. #9

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    Quote Originally Posted by GeoRXT
    Hey Ray any of your friends have any that are not in use?
    As far as i know, the only two skis using the RR stock class ECU in our riding area are yours truly and my buddy Israel Padilla but if you are looking for a RR first generation not reflashed (4501) ECU my buddy have one for sale.

  10. #10
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    Whats the difference? I want the stock class, but dont know about this reflashed ECU's...?

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