Water psi questions
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Water psi questions

  1. #1
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    Default Water psi questions

    I finally got my boat together yesterday and when I ran it i went to set the water psi and did not build any psi at the manifold.
    My set up is inlet-dump valve-headers-engine. The outlet from the thermostat divider has two 5/8 lines straight out the back of the boat.

    I installed a water psi gage in the manifold and it is a 0-100psi water pressure gauge.

    The engine runs at 160 and their is plenty of water running out of the t stat.

    Are the 2 5/8 lines big enough so i don't need the dump valve?

    If the temp is staying consistent then is everything ok with no psi in the manifold?

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  3. #2
    Senior Member SoldHondaBoughtHondo's Avatar
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    Quote Originally Posted by Tahiti18 View Post
    I finally got my boat together yesterday and when I ran it i went to set the water psi and did not build any psi at the manifold.
    My set up is inlet-dump valve-headers-engine. The outlet from the thermostat divider has two 5/8 lines straight out the back of the boat.

    I installed a water psi gage in the manifold and it is a 0-100psi water pressure gauge.

    The engine runs at 160 and their is plenty of water running out of the t stat.

    Are the 2 5/8 lines big enough so i don't need the dump valve?

    If the temp is staying consistent then is everything ok with no psi in the manifold?
    2 5/8 dumps...yep...no pressure..i believe one is supposed to dump and the other is for the headers
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  4. #3
    Super Moderator HammerDown's Avatar
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    Hmmm, zero psi could cause steam pockets in the block/heads.
    I use two dumps out the back yet hold about 9 psi at the manifold.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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  6. #4
    High Performance Marine ARS Marine's Avatar
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    Any more problems with Milk in the oil?

    Lets see some pics of the Ride!!

    We usually use a 0-30 gauge on the manifold, are you still using the bypass regulator setup?

    Glad to here ya got it wet.

  7. #5
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    I take the water for my headers from the back of intake manifold and have 2 overboard dump # 8 from thermostat housing with no gate valve. But i have a 6-71 supercharger with my build a little more heat. Works perfectly.

  8. #6
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    Quote Originally Posted by ARS Marine View Post
    Any more problems with Milk in the oil?

    Lets see some pics of the Ride!!

    We usually use a 0-30 gauge on the manifold, are you still using the bypass regulator setup?

    Glad to here ya got it wet.


    I am still using the bypass set up, but its not doing anything, i had to adjust it to get water flowing to the engine, then i kept an eye on the gage from idle to wot and the gage wasnt reading any psi.

    could the problem be the range on the gage? is a 100 psi guage not sensitive enough to read at the low pressures?
    I was goin to get a 0 to 30 and see if that picked up a reading???

  9. #7
    High Performance Marine ARS Marine's Avatar
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    The 100# gauge is a bit large for reading such a small amount of pressure.
    When we set up boat's with around 700 H.p. and a tight pump, the bypass regulator seems to hold the W.O.T. pressure in the block under 15# and still has water flow @ idle.

    Hope this helps

    Say Tahiti18 The seats in that boat are what inspired me to make a fiberglass version of the same design.

    Those are 100% Top Notch seats!!!

  10. #8
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    thanks that does help. ill go get a 0-30 psi gauge and try it.

    the seats are nice thanks for the compliment.
    but i need to make some mounts for them.

    did u get my pm?

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