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  1. #41
    Yes...exactly correct....also better out of the hole

  2. #42
    superair's Avatar
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    Just curious has anyone tried the old Riva adjustable nozzle where the rings can be changed? I have one on my 2008 SHO and was going to see if it would fit the GP1800.

  3. #43
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by superair View Post
    Just curious has anyone tried the old Riva adjustable nozzle where the rings can be changed?

    I have one on my 2008 SHO and was going to see if it would fit the GP1800.
    What is the exit nozzle angle, relative to the factory GP1800 exit nozzle angle?

  4. #44
    superair's Avatar
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    Quote Originally Posted by K447 View Post
    What is the exit nozzle angle, relative to the factory GP1800 exit nozzle angle?
    Well that I don't know and another thing I thought of is my old SHO only has a 160mm liner and prop but the pump is a 155 so it may not fit anyway.
    I may have answered my own question just now.


  5. #45
    mjh3ides's Avatar
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    Quote Originally Posted by superair View Post
    Well that I don't know and another thing I thought of is my old SHO only has a 160mm liner and prop but the pump is a 155 so it may not fit anyway.
    I may have answered my own question just now.
    It'll fit but those were designed for the older 6-vane pump so the vanes won't line up. You could bring your stock GP nozzle to a machine shop & have them mod it to accept the rings though. One issue is the rings are only available in the smaller sizes now.(81-85mm). They used to have them all the way up to 87.

  6. #46
    superair's Avatar
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    Thanks Mark for the suggestion. It is being recommended by Dean's Team to use an R&D 83mm exit nozzle and thought if this would work then at least I have a little bit of flexibility for tuning.

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  8. #47
    mjh3ides's Avatar
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    Quote Originally Posted by superair View Post
    Thanks Mark for the suggestion. It is being recommended by Dean's Team to use an R&D 83mm exit nozzle and thought if this would work then at least I have a little bit of flexibility for tuning.
    Give it a shot & see how you like it. The vanes not lining up shouldn't make much of a difference. If you still have your stock 83mm SHO nozzle, you could also try that. That way you'd only have to take apart one ski to try it. Going 4mm smaller on the nozzle will drop your rpm by at least 300, so if you decide to keep it that way you'll have to take some trailing edge pitch out of the prop to get the revs back up.

  9. #48
    superair's Avatar
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    Will do. Thanks, I do have my SHO nozzle. Isn't the angle a 3 deg vs 5 deg for the GP? How much influence do you think that might have?

  10. #49
    mjh3ides's Avatar
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    Quote Originally Posted by superair View Post
    Will do. Thanks, I do have my SHO nozzle. Isn't the angle a 3 deg vs 5 deg for the GP? How much influence do you think that might have?
    SHO nozzle is also 5*.

  11. #50
    Quote Originally Posted by Palm70 View Post
    Attachment 422378

    Is that it number 34? Do you need any other pieces?
    Wait a minute, is not No. 34, its No. 26 right?

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