Why install a Wet Manifold?

Discussion in 'DIY Marinizing' started by rjohnbriggs, Feb 27, 2005.

  1. tom kane
    Joined: Nov 2003
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    Location: Hamilton.New Zealand.

    tom kane Senior Member

    As a DIY solution to exhaust problems the choice is yours.Running a Turbo after a water jacketed exhaust manifold,with heat loss is common.You have to accept compromises with Turbos anyway,and install the best option you can get (even a water cooled Turbo if you want it.The choice and variety of configurations is massive in diesel engines.
    Is Exhaust Gas Recirulation a good option for emission control?it is an old idea.
    ECU settings can be varied for optimum running of motors.
    There should be no disadvantages using a metal-shroud/water-jacket exhaust manifold if thermal efficiency is taken into account when designing running gear.
     
  2. Carioca
    Joined: Aug 2005
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    Location: BRAZIL

    Carioca Junior Member

    The reason I brought up this subject is that a friend is about to do a DIY marinisation on a 6-cylinder automotive-type 6 cylinder diesel engine rated at 180 HP/3600rpm.

    He doesn´t want to lose any available power. Also, wants to stay away from the (potential!) mess of having fresh or raw water in intimate contact with the exhaust manifold.

    I told him to use a water-cooled metal-shroud.
    I have seen it done on a 6-cylinder Cummins 6 BTA. Apparently, so far so good.
     
  3. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    Many of the newer exhaust wrapping systems will keep a dry exhaust manifold cool enough to not overheat the engine space, or start a fire.

    Simplest and most reliable is the wet exhaust manifold that is cooled with a slightly larger sized keel cooler.

    This is the choice of commercial boats around the world, cheap quick , low risk , and best of all it doesn't need anything ('cept antifreez in the cooling system) to operate in winter where a sea water system would need service with each shutdown.

    While there are fine low drag hi $$$$ keel coolers ,

    in Maine, 2, 20ft runs of 1 1/2 pipe works well at very low cost.
    Lasts a decade or more if painted.

    FAST FRED
     
  4. Carioca
    Joined: Aug 2005
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    Location: BRAZIL

    Carioca Junior Member

    Many thanks Fast Fred. Do you know of web sites that carry exhaust wrapping material ?
     

  5. Carioca
    Joined: Aug 2005
    Posts: 82
    Likes: 2, Points: 0, Legacy Rep: 26
    Location: BRAZIL

    Carioca Junior Member

    Fast Fred, do not bother with my last request. GOOGLE solve the problem in a FLASH !
     
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