water pressure regulator plumbing?
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water pressure regulator plumbing?

  1. #1
    Senior Member crf311's Avatar
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    Default water pressure regulator plumbing?

    Here the deal. I'm adding a watts water pressure regulator to the cooling of my BBC jet boat. This is how I have it plumed. the water is coming off the pump to an open/close valve. then to the pressure regulator, to the front of the block, then out the t housing to the water jacketed headers. Is this correct? Do I need to install a water dump somewhere in the colling system? Thanks.

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    Senior Member H20MOFO's Avatar
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    Imo you should have 2 dumps, one to the injection lines(header) and 1 overboard.
    Another Hot Boat refugee

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    Senior Member bajadad's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Imo you should have 2 dumps, one to the injection lines(header) and 1 overboard.
    X2........

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    Living in a cage of fear thatguy's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Imo you should have 2 dumps, one to the injection lines(header) and 1 overboard.

    X3
    Tommy
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    Senior Member Oldsquirt's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Imo you should have 2 dumps, one to the injection lines(header) and 1 overboard.
    Quote Originally Posted by bajadad View Post
    X2........
    Quote Originally Posted by thatguy View Post
    X3

    If he had water injected headers you would be correct. If you read his post again you will see he has water jacketed headers. These should not need an extra dump line unless, for some reason, the manufacturer recommends it. If his exhaust is just the common aluminum "logs"(sometimes mistakenly called "headers"), then again, no extra dump line. All water exits through the exhaust.

    CRF311, post a pic of what you are running. From the pics in your album, it looks like you have injected headers.
    Last edited by Oldsquirt; 05-21-2009 at 03:45 PM.

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    Senior Member H20MOFO's Avatar
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    Good catch oldsquirt. If I had seen jacketed, I wouldn't have posted I've never owned any(no clue).
    Another Hot Boat refugee

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    Senior Member crf311's Avatar
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    Thanks for the reply's.
    Oldsquirt, the pics in my ablum show my old set up. I was running Bassett ot headers. I have switch to some Lighting water jacketed headers. I added the pressure regulator so I wouldn't need to worry about over pressure in the cooling system leading to water in the oil. Let me see if I have some new pictures of my set up. Thanks again

  11. #9
    Senior Member crf311's Avatar
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    I'll take some pictures in the morning. Thanks

  12. #10
    Senior Member crf311's Avatar
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    here are some pics of what I have.
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  13. #11
    Senior Member crf311's Avatar
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    TTT anyone

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    The way I see it is the headers have small volume for the water and could restrict flow out of the engine and need an extra dump. Also years ago when my dad was running in board he ran the in coming water to the exhaust manifold first to cool them and heat the water. It then went thru the engine and out the tail pipe just past the manifold to cool them.

    I would think your best bet would be to talk to Lighting.

    Tim

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