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  1. #1

    J-pipe questions

    1. Is the RXP j-pipe waterjacketed from the factory?
    I just want to confirm.

    2. Is there any water flowing through it? I would assume not because alot of guys are putting widebands in them.

    3. Where is the first spot in the exhaust where water is injected?

    thanks!!


  2. #2
    Student of Speed rxpwhistler1's Avatar
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    jpipe

    water does flow in jpipe right? The flush fitting in back has hose that goes from pump area to the top of the jpipe. It flows from jpipe to waterbox...I think.

  3. #3
    Vern's Avatar
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    J pipe is water jacketed. Water jacket begins after the flex joint (and the welded on heat shield) ends. Water comes in the two fittings that come off the exhaust manifold and out the fittings welded in the top of the pipe, as well as the three pisser holes where the water jacket ends and the silicone clamping it to the waterbox fits.

  4. #4
    i am thinking of fabbing a custom waterbox delete exhaust from the manifold to outlet. I was thinking full 3" piping jet-hot coated or wrapped with just a big water injection system in it. Any chances water would flow back into motor??

    Has anybody done this??

  5. #5
    REID2168's Avatar
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    Quote Originally Posted by codymouse54321 View Post
    i am thinking of fabbing a custom waterbox delete exhaust from the manifold to outlet. I was thinking full 3" piping jet-hot coated or wrapped with just a big water injection system in it. Any chances water would flow back into motor??

    Has anybody done this??

    i have had JET HOT adhered/coated to exhaust pipes for NEW BIG snow plow trucks and know the stuff works....but thats the best i got for ya!!!!

  6. #6
    they have some really good looking coatings now too-- they have one that is almost a chrome look.

  7. #7
    Moderator The Bandit's Avatar
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    Quote Originally Posted by codymouse54321 View Post
    i am thinking of fabbing a custom waterbox delete exhaust from the manifold to outlet. I was thinking full 3" piping jet-hot coated or wrapped with just a big water injection system in it. Any chances water would flow back into motor??

    Has anybody done this??
    Unless something is done to the exhaust manifold to open it up as well,
    (headers for example) I don't think a bigger pipe is going to give any significant gains. (I could be wrong)

  8. #8
    You may be surprised. I have seen big gains in turbo cars going from 3" to 4" exhaust.

  9. #9
    anybody else??

  10. #10
    Hydrotoys's Avatar
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    You are going to put a ton of heat in there, with just jethot.

    Why not do a straight shot of a pipe, and copy the J-pipe, with a larger outer diameter pipe.

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