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  1. #1
    Join Date
    Aug 2004
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    Home East Lancashire boat Spain
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    4,672

    Default Air intake silencer for 4108

    Anyone had success with this yet? I purchased the 'recommended' ( ford ranger?)box but it is a bit like a dustbin in size and I am struggling to find a good place to fit it.
    If reports are good I will struggle on but may need something smaller.

  2. #2
    Join Date
    Nov 2013
    Location
    Perth WA
    Posts
    2,182

    Default Re: Air intake silencer for 4108

    I've installed a 4.108 in an "engine-room" and I was hoping I would get away with some good insulation.

    Is that not sufficient?

    Did you see this thread?
    http://www.sailnet.com/forums/diesel...-silencer.html

  3. #3
    Join Date
    Aug 2004
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    Home East Lancashire boat Spain
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    4,672

    Default Re: Air intake silencer for 4108

    Quote Originally Posted by coopec View Post
    I've installed a 4.108 in an "engine-room" and I was hoping I would get away with some good insulation.

    Is that not sufficient?

    Did you see this thread?
    http://www.sailnet.com/forums/diesel...-silencer.html

    Noise Insulation is fine/essential but a surprising amount of noise is generated where the air is sucked in. Fellow forumites report big reductions in noise and I have personal experience of big noise reductions when using an air intake silencer on eberspacher heaters.
    No, not seen that thread but have seen many similar.

  4. #4
    Join Date
    Nov 2013
    Location
    Perth WA
    Posts
    2,182

    Default Re: Air intake silencer for 4108

    could you suck the air in from the (say) lazarette?

  5. #5
    Join Date
    Dec 2007
    Location
    S.W. France
    Posts
    7,681

    Default Re: Air intake silencer for 4108

    Back in the 80s I installed a Sailor Silent Set generator in the engine room of the company ketch. It had very effective exhaust mufflers ( Vetus) and a longish black plastic intake muffler that reduced the intake noise. Engine was a BMW ( Hatz) single and in it's insulated box one could talk right by it without raising one's voice. Not sure who made the intake muffler, but it might have been Vetus.

  6. #6
    Join Date
    Aug 2004
    Location
    Home East Lancashire boat Spain
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    4,672

    Default Re: Air intake silencer for 4108

    Yes coopec, I guess that drawing the air in from elsewhere ( and where there is plenty of clean air and noise is not an issue) would reduce the noise.
    the hose that DownWest mentions sounds like the ones for the eberspachers ( which are effective) these seem to be the ( standard) 25mm diam corrugated plastic hose enclosed in a larger ( 50mm?)diameter corrugated plastic hose. I may take one to bits but guess that the inner hose will have holes in it so that some air circulates/is drawn through the outer 'jacket'. With luck We may get an 'expert' to explain all this!!
    Fitting a larger version of that type of inlet silencer would appeal to me more than the large plastic dust bin thing I am considering!!

  7. #7
    Join Date
    Dec 2006
    Location
    Midlands
    Posts
    1,686

    Default Re: Air intake silencer for 4108

    Quote Originally Posted by pcatterall View Post
    Anyone had success with this yet? I purchased the 'recommended' ( ford ranger?)box but it is a bit like a dustbin in size and I am struggling to find a good place to fit it.
    If reports are good I will struggle on but may need something smaller.
    I used a remote air filter from a diesel car in a scrap yard, worked well and cheap also you can mount it where suits best.

  8. #8
    Join Date
    Sep 2003
    Location
    Cambridgeshire
    Posts
    1,391

    Default Re: Air intake silencer for 4108

    Quote Originally Posted by pcatterall View Post
    Yes coopec, I guess that drawing the air in from elsewhere ( and where there is plenty of clean air and noise is not an issue) would reduce the noise.
    the hose that DownWest mentions sounds like the ones for the eberspachers ( which are effective) these seem to be the ( standard) 25mm diam corrugated plastic hose enclosed in a larger ( 50mm?)diameter corrugated plastic hose. I may take one to bits but guess that the inner hose will have holes in it so that some air circulates/is drawn through the outer 'jacket'. With luck We may get an 'expert' to explain all this!!
    Fitting a larger version of that type of inlet silencer would appeal to me more than the large plastic dust bin thing I am considering!!
    That is exactly what is in the Eberspacher silencer... along with some foam in the outer pipe..... They work surprisingly well for what they are....... perhaps its vodo???

  9. #9
    Join Date
    Dec 2007
    Location
    S.W. France
    Posts
    7,681

    Default Re: Air intake silencer for 4108

    The bit I was talking about was not a hose, it was a moulded plastic job that looked a bit like some of the Vetus mufflers for the last bit of an exhaust run.

  10. #10
    Join Date
    Nov 2004
    Location
    Essex
    Posts
    516

    Default Re: Air intake silencer for 4108

    My old 108 had a flame gauze fitted directly to the manifold with an automotive cleaner on top. I think that if you have to use the "Thermostart" which involves flames ! A flame trap might be good idea, or some metal duct before adding any plastic.

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