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  1. #1

    can rrfpr be replaced by any electronic part

    Besides riva ecu and injectors? Was thinking more of a self tuning de vice


  2. #2
    To much is never enough Badvgood's Avatar
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    can rrfpr be replaced by any electronic part

    Check out Dynotunes CMD range of products for replacing the RRFPR.

    http://www.4-tecperformance.com/inde...ndex&cPath=192

  3. #3
    I have seen that but will it completly replace an rrfpr? Plase explain

  4. #4
    SJL Custom's Avatar
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    Put proper size injectors on, the factory fuel pressure regulator, and a CMDM with Autotune and youre all good. The auto tune feature will boost and cut the fuel trims where needed to acheive the target AFR Value set in the fuel table you create. Sounds difficult but it really doesnt get any easier than that. You could leave the RRFPR on as well but really isnt needed with the CMD.

  5. #5
    boost junkie skidoochris's Avatar
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    cmd can only cut fuel so much
    it will never work on like 2000cc injectors
    but will be great on 60-80lb injectors
    and the rrfpr may still be needed if your boost is high enough

  6. #6
    2000cc injectors? That's about 190#/hr...almost 5 times the stock size. Why would you need that in a Sea Doo 4-Tec? That size of injector would support over 1100hp. Let's use realistic scenarios.

    The CMD Marine unit can remove up to 100% of the duty cycle of the injector, which basically turns it off. There is always a mechanical limit as to how quickly you can open and close an injectors' pintle, and how much fuel is delivered in that amount of time is based on the size of the injector.

  7. #7
    boost junkie skidoochris's Avatar
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    actualy that would be the correct size for 600hp on e-85
    and to be honest even a 1200cc is too big for the cmd to get a good idle

  8. #8
    At that point I would have to recommend going to Megasquirt or any other ECU that can run staged injectors. 200 hp from one injector is a bit of a challenge. My kids e85 turbo rotary has a 4 250s and staged set of 4 1300s

    Andy

  9. #9
    Bottom line is the pressure in the rail needs to be about 43 psi above the pressure in the intake.

    Andy

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