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  1. #1
    Chrisx88's Avatar
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    Jetpump water reducer washer

    Just bought a used open loop cooling system for my 05 rxt 215. Did not come with proper sized water regulator washer, or whatever you want to call it. I cannot find a replacement on riva or here. So what MM could i drill my stock yellow one out to?

    Open loop
    Fizzle
    Riva waterbox
    xcharger
    etc
    etc


  2. #2

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    Depending are you using factory water route or have you made independent dumps.
    If you have an independent dump for each cooled item open that thing as big as you can.
    That is 3/4 dumps for each

    For a factory water route I think from what I have seen is 10-11mm

  3. #3
    Chrisx88's Avatar
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    Its all routed exactly how riva shows in diagram.

  4. #4
    Mothman's Avatar
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    Use the smallest diameter washer hole you can to maintain proper temps, because every oz of unneeded water moving through the cooling system and not the pump is lost thrust/speed.

  5. #5
    I used the green washer/reducer off a 08 rxpx


  6. #6
    Chrisx88's Avatar
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    Quote Originally Posted by 01xp View Post
    I used the green washer/reducer off a 08 rxpx
    Any idea ID of the hole?

  7. #7
    No idea but you can order it if need be cause it's a factory part

  8. #8
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by Chrisx88 View Post
    Just bought a used open loop cooling system for my 05 rxt 215. Did not come with proper sized water regulator washer, or whatever you want to call it. I cannot find a replacement on riva or here. So what MM could i drill my stock yellow one out to?

    Open loop
    Fizzle
    Riva waterbox
    xcharger
    etc
    etc
    From the OEM store, Order item number 11 for a 2008 RXT-X255 (green reducer). Its about 9mm in diameter.
    http://partsfinder.onlinemicrofiche....R%20SILVER)%20[318A]%20PROPULSION%20SYSTEM%20-%20INTERNAL

  9. #9
    Chrisx88's Avatar
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    Ill just drill mine out to 9mm and go from there. Im already prepared for a good month of testing / tuning when spring comes.

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