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  1. #1
    ...Lighting The Water On Fire Since '04 duramaxxed's Avatar
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    Question About Upgraded ECU

    Ok, say I was to get the RR 8800 ECU for my Boat, which would now Move the Rev Limiter to 8800rpm's.

    I don't necessarily NEED the Valve Spring Upgrade if I'm not Revving that High, right?

    Or does the ECU make such a Dramatic Difference and Add enough Power, that you WILL be Revving that High?


  2. #2
    JFizzleJR's Avatar
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    If you come un-hooked for any reason you can count on your motor hitting the limiter. The ECU itself won't bring the RPMs up. You will need to add HP or change the impeller pitch to get the most efficient result. The RPMs also skyrocket out of the hole too.

  3. #3
    ...Lighting The Water On Fire Since '04 duramaxxed's Avatar
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    Quote Originally Posted by JFizzleJR View Post
    If you come un-hooked for any reason you can count on your motor hitting the limiter. The ECU itself won't bring the RPMs up. You will need to add HP or change the impeller pitch to get the most efficient result. The RPMs also skyrocket out of the hole too.
    Gotcha. So even for that Split Second of coming Unhooked, you got a good chance of Toasting the Motor without the Spring Upgrade.

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