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Wojo Modified Husky 61 Rancher Hawaii 5-0

Discussion in 'Chainsaw' started by ScottWojo, Oct 25, 2007.

  1. ScottWojo

    ScottWojo AboristSite Guru

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    Ok here it is, the very first Wojo Husky modified muffler.

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    Faced the pipe inlets away from the port and used spark screen that is 30% nickel and heat treated. Pipe discharge tips polished on the buffer.

    This one is getting shipped to Hawaii.
     
  2. troutfisher

    troutfisher Addicted to ArboristSite

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    Nice Mod! Looks good, How do I know how much pipe needs to be inside the muffler? I see you've left more pipe inside the muffler than outside, is there a theory? Thanks..
     
  3. ScottWojo

    ScottWojo AboristSite Guru

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    Yes, there is a theory.

    The customer requested the pipe configuration. The actual pipes are slightly curved.
    Ports are sized to the inside area rather than the actual pipe ID. By manipulating the size of the cutout on the inside of the pipe and then fine tuning according to the size of the stainless steel screen, you are able to achieve the appropriate port opening. With pleanty of flow but still good back pressure.

    I faced the opening of the pipe away from the exhaust port. This is meant to cause a slight sound wave rebound inside the can before the exhaust is discharged. And its main purpose is to give the sound a little less loudness. And a better throaty sound. Much better sound than just drilling a hole in the cover.

    With Great Esteem.
    Scott.
     
  4. Four Paws

    Four Paws Addicted to ArboristSite

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    If I have a 2 piece muffler to work with, I don't like any pipe protruding into the muffler. If it is a 1 piece muffler, I try to minimize or eliminate the portion of the pipe that protrudes into the muffler. To do this, you can shape and fit the tube to the outside of the muffler, then weld it on. After it is welded on, go in and drill, grind and/or file away the muffler sheetmetal on in inside of the hole. Just a different way to skin a cat - but I have my reasons.
     

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