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  1. #1

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    What gains will I get with 08 Riva Pro Water Box for my 05 RXT

    I have an 05 RXT and I'm thinking of getting the 2008 Riva Pro Water Box and wondering what gains we'll get. I know I'll need the mid pipe, the coupler and clamp. I have done the following mods, thru hull exhaust, 4" Fizzle air intake, Fizzle HE I/C, Fizzle catch can, x-charger, bosch 42's, rrfpr, innovate mtxl gauge/o2 sensor, 15/20R impeller, graco screen. I might change the wheel in the x-charger. The way it's set-up right now the ski runs perfect although not as fast as I thought it would have (72.4 on gps @ 8100) Right now the ski runs right up to 8100 and stays right there doesn't fluctuate at all.

    What gains will the Riva Water Box give me
    What wheel would you guys recommend.
    If I change the wheel I'm sure Id have to change the injectors, if so what injectors.

    Any help is appreciated


  2. #2
    imp0ster's Avatar
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    unless you're switching to a 08+ style mid pipe nothing measurable. Even then not that much. Will help with engine temp and longevity though since it reduces back pressure.

  3. #3

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    Yes I would be switching to the 08 style to get rid of the "J" pipe, so I could remove the s/c without removing the water box

  4. #4
    imp0ster's Avatar
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    I can't speak of what you will gain since my TDR went in with other crap but I think it's worth switching to 08+ style aftermarket box. Do yourself a favor if you're going through hull and buy about 10 inches of ultra temp coupler. It flexes just enough and is far easier to work with vs the Riva couplers.

  5. #5
    5.7 silverbullet's Avatar
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    Sounds like I'm going to be installing the same mods you have, so I'm very interested in what your doing. Only thing different no loud exhaust for me.

  6. #6
    imp0ster's Avatar
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    I have 50# injectors for sale and yes, you'll need them with a wheel larger than the X-SC

  7. #7

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    I have the thru hull exhaust now, good idea on the 10" of coupler,
    5.7, my ski is a little louder but not as much as I thought it would be, not annoying

  8. #8
    5.7 silverbullet's Avatar
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    John is your PCW still user friendly with your mods? Is there anything you would not have done or done differently? Mines a 06rxt that I'm putting the x-charger on I have not ordered the other things I need yet. Question you are still running the stock ecu with just the bolt on you have with no issues? P.M me not trying to take thread off topic.

  9. #9
    Eastside Powersports Slow 91's Avatar
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    FYI, you can R&R supercharger on a Jpipe ski w/Riva Waterbox.

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  11. #10
    5.7 silverbullet's Avatar
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    If you up grade to larger injectors let me know if you plan to sell your 42# injectors.

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