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Rotax Racing question about old RRECU & New SCer Impelle

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  • Rotax Racing question about old RRECU & New SCer Impelle

    Will the OLD flash RRECU work with the New RR SCer impeller and stock injectors?

    I ask because I am about to buy a old Flash RRECU, but for the use of the New SCer impeller.


    Thank you!!!!


    .
    sigpicDon't sweat the small stuff. Be happy! Ride on!

  • #2
    Anyone know!!!!
    sigpicDon't sweat the small stuff. Be happy! Ride on!

    Comment


    • #3
      WAG Probably... depending on Ic, prop,etc. The old version didn't have as much timing and more fuel than the new version. Ya know you need to check it with an A/F guage.

      Comment


      • #4
        Austin--Should work---the stock class ecu works great with the RR SC impeller. In our heat you will have enough fuel.
        2018 RXTX

        2012 Wake 155

        Comment


        • #5
          RAY, Did you get the new RR Impeller? You turkey!!!

          I just want my ski to run a solid 75mph in the heat with a full tank of gas
          and my big but.


          .
          sigpicDon't sweat the small stuff. Be happy! Ride on!

          Comment


          • #6
            Ray will get his new impeller tomorrow. I just overnighted his supercharger back to him
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            • #7
              Ray let me know if ya want me to come by and HELP ya test it???
              :P :P :P


              .
              sigpicDon't sweat the small stuff. Be happy! Ride on!

              Comment


              • #8
                Originally posted by sundance
                Austin--Should work---the stock class ecu works great with the RR SC impeller. In our heat you will have enough fuel.
                So Ray, do this mean that you are going to test the new RR SC impeller with the stock 38's injectors?? do you have a A/F meter in your ski? thanks

                Ray
                05 RXT, XS (type 9) 2.5 ID intercooler, Rude charger, Metal washers, Riva ECU, 50lbs/hrs injectors, Riva upgrade valve train, Riva tru-hull metal exhaust, Riva IC metal pipes, Riva sponsons, Impros solas prop, back up prop skat 15/19, Riva air intake, piranha front engine mount, Riva intake grate, Riva 158 deg thermo, Greedy metal BOV, skegs, PPG opas block off, Riva adjustable nozzle kit, Reverse bucket mod

                Comment


                • #9
                  NO he has the RR Stock class legal ECU.

                  .
                  sigpicDon't sweat the small stuff. Be happy! Ride on!

                  Comment


                  • #10
                    So many questions--so little time Ok--here the deal--I should have my ski running by tomorrow afternoon (Friday May 19 ) I have the stock class RR ECU (4502 I think is the number.) Will let you guys know how it does. Austin--you can come ride it anytime--you too Ray.
                    2018 RXTX

                    2012 Wake 155

                    Comment


                    • #11
                      Originally posted by sundance
                      I should have my ski running by tomorrow afternoon (Friday May 19 ) I have the stock class RR ECU (4502 I think is the number.) Will let you guys know how it does.
                      Ray, did you finally tested your ski with the new RR SC wheel? well today we tested one on my buddie Israel Padilla stage II RXP here are this ski mods, complete Riva stage II + RR stock class ECU, RR 10 psi SC impeller, RR 42 lbs/hrs injectors, Impros blueprinted and repitched 14/20R solas prop, Riva high flow hood, RR 158 thermo, Riva pro series opas block-off

                      TODAY NUMBERS with 93 deg air and high humidity weather ..

                      77 MPH (on radar) @ 8450 peak rpms

                      The ski pull like a train from the hole with blistering accel, at the same time another guy from the east coast was testing another RR wheel in another 04' stage II RXP with his *** stock 38lbs/hrs injectors*** and told us that he ran his boat very hard for a while without a single issue.
                      05 RXT, XS (type 9) 2.5 ID intercooler, Rude charger, Metal washers, Riva ECU, 50lbs/hrs injectors, Riva upgrade valve train, Riva tru-hull metal exhaust, Riva IC metal pipes, Riva sponsons, Impros solas prop, back up prop skat 15/19, Riva air intake, piranha front engine mount, Riva intake grate, Riva 158 deg thermo, Greedy metal BOV, skegs, PPG opas block off, Riva adjustable nozzle kit, Reverse bucket mod

                      Comment


                      • #12
                        The ski pull like a train from the hole with blistering accel, at the same time another guy from the east coast was testing another RR wheel in another 04' stage II RXP with his *** stock 38lbs/hrs injectors*** and told us that he ran his boat very hard for a while without a single issue.
                        What MPH did he get?

                        Comment


                        • #13
                          damn, these results are insane!! i'm lovin it. I been contemplating going back to Riva stage 1 and stayin there....i have a new motivation now after hearing all these numbers with the RR SC impeller. I need to find my problems and gremlins
                          EZ Dock of Long Island
                          Sunstream Boat Lifts
                          516-468-DOCK
                          Long Island, NY

                          Comment


                          • #14
                            Steve what to sell your RRECU???

                            And think I want anothere RXPPPP!!!

                            .
                            sigpicDon't sweat the small stuff. Be happy! Ride on!

                            Comment


                            • #15
                              Originally posted by ramnj

                              What MPH did he get?
                              Hi Rafy, sorry he didn't talk about speed numbers , he called my buddie and was telling him that he was stomped with the difference in performance after the SC impeller mod, also his ski set-up is very different from Israel since he have more mods than him, for example he is also running a nitrous system with a very (tall) tweaked 15/20R prop to keep his ski away from the rev limiter, also he have the RR race cam, (not sure if the head is ported or not,) and a RR (4501) first generation ECU NOT the same stock class (4502) that Israel is running in his ski.
                              05 RXT, XS (type 9) 2.5 ID intercooler, Rude charger, Metal washers, Riva ECU, 50lbs/hrs injectors, Riva upgrade valve train, Riva tru-hull metal exhaust, Riva IC metal pipes, Riva sponsons, Impros solas prop, back up prop skat 15/19, Riva air intake, piranha front engine mount, Riva intake grate, Riva 158 deg thermo, Greedy metal BOV, skegs, PPG opas block off, Riva adjustable nozzle kit, Reverse bucket mod

                              Comment

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