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Thread: 08 RRFR

  1. #1

    08 RRFR

    What Are The Options Other Than Sending The Fuel Pump Assembly To Peurto Rico Is Some One Wants To Run A Fuel Regulator On An X Model.or Will The Rr Ecu And 60lb Injectors Be Good Enough To Run A C-kit, Rude2 Or Etech Charger.


  2. #2

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    You may just BARELY be ok with the RR ECU and 60's. If they are like the other ECU's the injectors are wide open at 14-15psi. So what is the max HP/boost 60# inectors will support at 58psi? Someone more knowledgable them myself will probably chime in and say you need an rrfpr. I currently know of no other option than to put an 07 pump/tank in your boat, or send you fuel pump to PR.

  3. #3
    The formula is (Sqroot (new net fuel pressure (58-14.5=43.5) / old net fuel pressure (43.5=stock flow rating of injectors)) * injector flow rating.

    (Sqroot (43.5/43.5)) * 60 = 60 lbs/hr.

    60 * 3 (# of injectors) = 180 lbs/hr fuel flow

    180 lbs/hr * 2 (.5 lbs/hr/hp on our skis) = 360 hp of work done

    360 hp - power loss to drive sc'r and valve train = approx. 350 crankshaft hp.

    That combination would support up to approx. 350 crankshaft hp.

    I guess I could have just typed in 350, but that would not have been as informative.

    Mark

  4. #4
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    RRFPR for sure...

  5. #5
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by GeoRXT View Post
    RRFPR for sure...
    I agree. You will need the RRFPR.

  6. #6

    rrfpr

    what is the turn around for the fuel pump modification.i will be sending it from thailand.

  7. #7
    Will work on YOUR ski for FREE! GeoRXT's Avatar
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    Quote Originally Posted by GMONEY View Post
    what is the turn around for the fuel pump modification.i will be sending it from thailand.
    Uff....who knows....If I were you I would send it to Malvin In PR....Top Notch!

  8. #8
    TERRY bigbuck12345's Avatar
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    I Did The First One On My Rxt-x And It Is The Way To Go Only ,,,thanks To Malvin And Jerry=d>

  9. #9
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by GMONEY View Post
    what is the turn around for the fuel pump modification.i will be sending it from thailand.
    Just a couple of days. If you want i can send you a new fuel pump module for $238 extra.
    Last edited by Green Hulk; 10-12-2008 at 02:30 PM.

  10. #10

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    This sure doesn't look very difficult to do yourself. That being said, I haven't done one yet, but I've looked over the exploded view in the service manual, and inspected the pump module itself, and It seems like a relatively simple mod. Just pull the fuel pump, and it should be fairly self explanatory how to re-route the fuel pump exit around the internal regulator. matter of fact, I may do this over the weekend. If its as easy as I am foreseeing I may offer this mod, because I have spoken to a number of people that want it done, but don't want to be without a fuel pump. I'm also planning to write up a how-to swap an 07 fuel pump assembly into an 08 ski. I'm going to try and give a little something back to the forums!!

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