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  1. #1
    skigolfnut's Avatar
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    Raising rev limiter questions for Racing

    I am currently running a Rotax racing ecu with the rev limiter at 8650 rpms, I have done the valve train upgrade with Supertech kit,
    This past race season I was 8500 rpms in this Texas heat and sometimes coming unhooked I am sure it hit the limiter, which leans the fuel out somewhat,

    1. What RPM could I raise my rev limiter up to and still run safe?
    (the wide open runs are short burst on the start and backside)
    I have the ET-137 wheel and it gets the best boost at 8600-8700 and up,

    2. When raising the rev limiter do I need to change my injectors? (I have an AFR gauge and a RRFPR)

    3. Would adding the 48 lb injectors help in any way?


  2. #2
    skigolfnut's Avatar
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    anybody?

  3. #3
    skigolfnut's Avatar
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    ttt

  4. #4

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    Me. Same question

  5. #5
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    What class you racing? Ill assume limited bc of the charger, still pretty sure you may not touch injectors In limited. I've heard the big dogs running seadoo's turn them pretty hard 9000ish but they pull the head redo springs and valves quite often to keep them alive..... Hearsay like I said

  6. #6
    skigolfnut's Avatar
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    I am racing in limited class,
    The rules say that in Limited and Stock class rules we can backdate or update different years of ski parts, so if a newer model uses the 48's then I can use the 48's, just like I was able to use a X charger and still run in the stock class, now with the ET-137 wheel I am in Limited Class,
    I just wanted some input of when raising the rev limiter do I need to use bigger injectors or not,
    I guess if my aft's lean out then I know to go with bigger injectors to keep it from runninn lean,

  7. #7
    Matatan tocullo's Avatar
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    Go 48s and raise rpms a couple hundred you should be fine. You might need to find a way to adjust your AFR other than rrfpr.

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