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  1. #11
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Green Hulk View Post
    Performance of one ski will will vary to the next even when identically modified. Not to mention variables in rider weight and riding style. You are not going to get a true back to back comparison of intake grates with this method. Good luck with that!!!

    The above results are just baseline numbers, you can expect all three of the above tested intake grates to produce even better acceleration numbers due to reduced cavitation once properly sealed into the hull.
    Indeed, I might expect the intake grates that had their acceleration impaired the most by excessive ventilation (air gaps without sealant) to potentially improve the most from proper sealing.

    From an acceleration perspective it is possible the Worx or R&D intake grates may actually work very well with proper sealing, even compared to the Riva intake grate. Top speed results might improve too.

    Back to back testing is time constrained. Sequential testing with changes between each test. Small differences are hard to discern.

    Side by side testing can be done multiple times. Baseline checks with each rider on each ski, noting differences. Then upgrade the grates and have the riders ride all three. Riders with good internal calibrations will be able to tell what is better than what. Even better if they have a fourth machine available for baseline reference that remains with stock intake grate.


  2. #12
    I'd rather be jet skiing Saltwater n Premix's Avatar
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    Thanks Jerry

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  4. #13
    TrimmedOut15's Avatar
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    Great tests and thank you. How would the stock grate compare? Also you said you would never run the stock grate, why is that? Thanks for all the help.

  5. #14
    stifun's Avatar
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    Hey jerry, time to use that vbox sport to compare data on tunes?

  6. #15
    any video on how to do installation on a gp1800?

  7. #16
    Spiiz's Avatar
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    Thanks for a great video and detailed thread.
    I noticed on the ride plate you have a block off over the paddle wheel cutout.
    Can I buy one from the gh store?
    Do you tbink it makes any difference?
    Love your fantastic work Jerry... Please keep it coming ����

  8. #17
    Great work! TNT is not easy work on cars let alone water. Jerry thank you for the review and pointing me in the right direction on my VXR.

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  10. #18
    SpeedJunky's Avatar
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    Thanks for doing the testing Jerry!!


    I am leaning toward the R&D unit because I believe once you seal it up properly you will see an improvement on the accel numbers and possibly top speed.

    Wonder if a back to back test off the RIVA grate without factory seal vs seal would be possible?
    That would tell us how much that seal effects the numbers.

    Will you be staying with the Riva unit on your ski?

  11. #19
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by SpeedJunky View Post
    ...

    Wonder if a back to back test of the RIVA grate without factory seal vs seal would be possible?
    That would tell us how much that seal effects the numbers.

    ...
    Any intake grate that is not fully sealed to both the transom plate and to the ride plate front edge can leak air into the jet pump and reduce acceleration from low speeds.

    Removing the factory rubber sealing strip (without replacing it with some other sealing method) would undermine the performance of the Riva intake grate, or any other grate.

    Testing of incompletely sealed intake grates is not useful information, for acceleration comparisons.

  12. #20
    SpeedJunky's Avatar
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    Quote Originally Posted by K447 View Post

    Testing of incompletely sealed intake grates is not useful information, for acceleration comparisons.
    The worx and R&D in the test above had no rubber seal when tested!!!!
    Was just wondering how the Riva accel numbers would change.

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