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  1. #61
    ksalles's Avatar
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    Ok...I did some more testing and wanted to post my results for those interested. I installed a brand new, out the box, Yamaha factory impeller. The reason I did is because I was having more cavitation than I felt I should have. The air was nowhere near as good as my last test when it spun 7900 through the 83mm nozzle with the 13/19 Solas. I wasn't expecting high speeds because of the air today. First was the new stock impeller with the 83mm nozzle. Surprisingly, it went 69.2mph at 7450 rpm and ZERO cavitation. Next I changed to the factory 87m nozzle at the launch and it went 69.9mph at 7670 rpm also with ZERO cavitation. I didn't have an 85mm to test, but will have my hands on one soon. From my testing, I feel the 87mm nozzle is not as efficient with the stock impeller at those given rpm and a smaller nozzle would be. Being these skis aren't supercharged, I feel they make enough torque to still make good speed and acceleration through the smaller nozzle as long as they're getting enough air to make power. So far, the fastest combination in good air has been the 83mm, but I have a feeling the 85mm nozzle will be close, if not faster. Just wanted to share my findings, and I'll post my results once I test the 85mm. Keith
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  2. #62
    Bob 1tommygunner1927's Avatar
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    It would be interesting to see how the L13 might affect your testing.

    As always, good job!

  3. #63

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    Keith, what brand tack is that u are using? How does it compare to the PET 2100? Thanks Tommy Jordan

  4. #64
    ksalles's Avatar
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    Tommy...it's a Runleader tach and I've had great success with it. I never owned a PET 2100, just the old tiny tachs years ago. The nice thing is the battery is interchangeable and you can get them reasonably priced as seen here... https://www.ebay.com/itm/Back-light-...77ca%7Ciid%3A1

    I also noted the installation here on this p;age in my GP build thread... http://greenhulk.net/forums/showthre...=283207&page=3
    Quote Originally Posted by 2fast4u View Post
    Keith, what brand tack is that u are using? How does it compare to the PET 2100? Thanks Tommy Jordan

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  6. #65
    ksalles's Avatar
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    I have a cone for this application, but was going to try the different nozzles first. I feel I'm really close to the setup I'll be keeping on the ski, and will fine tune it with the nozzle if need be, or my desired results aren't achieved. I generally keep every nozzle I get my hands on for situations as these, but a friend needed my 85mm so that's where it went. I am looking forward to trying the 60t nozzle though (85mm 5 degree from a GPR) because that nozzle was always fast for me on so many different setups and power levels when properly matched to the impeller.
    Quote Originally Posted by 1tommygunner1927 View Post
    It would be interesting to see how the L13 might affect your testing.

    As always, good job!

  7. #66
    MSX 150 guy lives on Mr. GP1800's Avatar
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    I have a PET tach installed on my GP. I used to have this same tach that keith uses on his. It works very well. The only issue I’ve seen with these techs is they tend to let water in. But for 20 bucks or whatever they cost it’s not a huge issue.

  8. #67
    MSX 150 guy lives on Mr. GP1800's Avatar
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    Id really love to see what this ski can do with a tune. Once I get mine all dialed in and running well I may throw a tune in it to see if there is any improvement. But if I can get mine running even close to what keith is seeing id be more than thrilled. I really wonder if a tune could get you over 70. Anyone running a vxr with a tune?

  9. #68
    4-keeps's Avatar
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    Mr.GP1800, Bill a forum member and friend to Keith & I is running a Dean’s Team tune on his VXR. His ski runs in the low 70ish range. I’m sure he will chime in.

    Billy D

  10. #69

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    Quote Originally Posted by ksalles View Post
    Tommy...it's a Runleader tach and I've had great success with it. I never owned a PET 2100, just the old tiny tachs years ago. The nice thing is the battery is interchangeable and you can get them reasonably priced as seen here... https://www.ebay.com/itm/Back-light-...77ca%7Ciid%3A1

    I also noted the installation here on this p;age in my GP build thread... http://greenhulk.net/forums/showthre...=283207&page=3
    THANK YOU!

  11. #70
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by ksalles View Post
    I have a cone for this application, but was going to try the different nozzles first. I feel I'm really close to the setup I'll be keeping on the ski, and will fine tune it with the nozzle if need be, or my desired results aren't achieved. I generally keep every nozzle I get my hands on for situations as these, but a friend needed my 85mm so that's where it went. I am looking forward to trying the 60t nozzle though (85mm 5 degree from a GPR) because that nozzle was always fast for me on so many different setups and power levels when properly matched to the impeller.
    I await your results....as time and effort allows. I love this kinda stuff!


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