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  1. #1

    seadoo rxt-x install aftermarket racing parts top loss

    i have a seadoo rxt-x 2008 install after parts is below

    (1) riva water box
    (2) riva valve train kit
    (3) riva SS wear ring
    (4) solas 15/22r impeller
    (5) riva intake block-off kit
    (6) R&D aquain intake gate
    (7) worx racing sponson
    ( riva pro-series O.P.A.S kit
    (9) riva oem intercooler upgrade kit
    (10) riva pro-series blow-off valve kit
    (11) 2 rude performance supercharger impeller and housing
    (12) riva supercharger culth washer
    (13) 4" power filter by seadoo racing centre
    (14) oem ECU re-program by seadoo racing centre go to RPM 8650 using 50ib injector
    (15) riva 50ib injector kit
    (16) riva catch can
    (17) rude RRFPR
    (1 riva reduction nozzle kit (using 83mm ring)

    after i install finsih , i test the sea water , rpm 8280 and gps 74.5mph, i dont know happend , why the top speed performance loss, but bottom speed very fast, no boost leak and water leak in skis, can u help me find problem , and any idea for skis can go 80mph top speed


  2. #2
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by thomas loh View Post
    i have a seadoo rxt-x 2008 install after parts is below

    (1) riva water box
    (2) riva valve train kit
    (3) riva SS wear ring
    (4) solas 15/22r impeller
    (5) riva intake block-off kit
    (6) R&D aquain intake gate
    (7) worx racing sponson
    ( riva pro-series O.P.A.S kit
    (9) riva oem intercooler upgrade kit
    (10) riva pro-series blow-off valve kit
    (11) 2 rude performance supercharger impeller and housing
    (12) riva supercharger culth washer
    (13) 4" power filter by seadoo racing centre
    (14) oem ECU re-program by seadoo racing centre go to RPM 8650 using 50ib injector
    (15) riva 50ib injector kit
    (16) riva catch can
    (17) rude RRFPR
    (1 riva reduction nozzle kit (using 83mm ring)

    after i install finsih , i test the sea water , rpm 8280 and gps 74.5mph, i dont know happend , why the top speed performance loss, but bottom speed very fast, no boost leak and water leak in skis, can u help me find problem , and any idea for skis can go 80mph top speed

    Welcome to the forum!!!

    What was your ski running before the mods, rpm and speed?

    If everything is good, no boost leaks etc, then you need pitch taken out of prop to get rpm up and speed will come up.

    If you dont want to bend your prop right away then put the stock nozzle back on (86.6 mm and shorter) and see where your rpms are at, but if everything is right then you need pitch out of prop to get rpm and speed up.

    Good luck !!!

  3. #3
    SPEED COMES 1/10 @ A TIME SpeedFreeks Racing's Avatar
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    blow off valve

    if i were you before you go crazy with other things i would take the riva blow off valve off and block the hole in the pipe with a plate and see what happens. i have never had any good luck with the riva blow off valves they always seem too leak or have some kind of problem.

    good luck...

  4. #4
    home of the dislexic fingers breon's Avatar
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    i agree with speed freaks...do you have a boost guage on it ..you should be at 15 psi or there abouts at 8600 rpm with a rude 2...you arnt seeing the rpm you should ..rpm = boost and boost = rpm ...you should be 50 rpm below red line ..you are missing 300 rpm..boost/power ??? pitch ?? nozzzle all controle rpm ..and the prop doesnt seem off for those mods..with those mods you should be almost 80 ..on and average day...better on a perfect one..i upgraded from a 10 psi s3 charger stock ecu to a x charger and riva ecu and my bov was set to loose and was only getting 11 psi instead of 12 13 ...because it was leaking ...if it is adjustable you can just crank it down so it cant open and take the line off for the test.....

  5. #5
    Doel Tiburon1264's Avatar
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    I agree with the other members, before you go pulling something check for boost leaks. You running a 2Rude and with that setup your boost needs to be at 15-16psi. Get a Air Leak tester! And check your completed system. You have a big boost leak...........Good Luck!

  6. #6
    Steve STSPERFORMANCE's Avatar
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    Check your throttle body bolts while your at it mine came loose by themselves on my tx once...

  7. #7
    Got Boost? psycho rxp's Avatar
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    Also find out what your supercharger clutch slip is set at. too low, and you won't make full boost.

  8. #8
    speedskixp's Avatar
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    You really need to be checking your A/F with that ecu. They have been known to be very lean.

  9. #9

    how to test supercharger boost

    thank for reply, before my skis install without the oem ecu reprogam by seadoo racing centre , riva valve train kit , rude RRFPR and 4" power filter kit , last time i install riva x-charger impeller and housing, get the rpm8040 and gps74mph , test supercharger boost , how to test is better ?

  10. #10
    Site Admin Green Hulk's Avatar
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    Thomas, i really think your slip moment is too low on your supercharger. Check the slip and shim the clutch as necessary. I would like to see 16 ft lbs of slip on that 2rude.

    Also like skeedskixp said, you could be running lean with that ECU.

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