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Best 1127 muffler mod?

Discussion in 'Chainsaws and Power Equipment' started by lukem, Oct 3, 2015.

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  1. lukem

    lukem

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    So...I ran my dad's 310 earlier in the week. Then I ran my FILs 290 today. Then I ran my BILs 290.

    They were underwhelming. I know I can't make them run like a pro saw but they need help.

    What's the best place and size to open these up?
     
    lukem, Oct 3, 2015
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  2. Cut4fun

    Cut4fun

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    Do it yourself in 30mins and then retune the carbs. 20% gains most times but had one I got 23% from.
     
    Cut4fun, Oct 3, 2015
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  3. lukem

    lukem

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    Where do you do the cutting/drilling/grinding?
     
    lukem, Oct 3, 2015
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  4. MasterMech

    MasterMech The Mechanical Moderator

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    Easiest is to open up the deflector opening and punch a couple holes in the dimple underneath. That's not the quietest but it won't be too awful if you don't get carried away.
     
    MasterMech, Oct 3, 2015
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  5. Chvymn99

    Chvymn99 Moderator

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    Chvymn99, Oct 3, 2015
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  6. Cut4fun

    Cut4fun

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    I like to do mine like this. Using the middle see the most gains. Also open the outer deflector for it too.

    I open up white areas added and open up existing.

    mmmmmmmmmmmm.jpg
     
    Cut4fun, Oct 3, 2015
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  7. Cut4fun

    Cut4fun

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    Screen out for pic to show deflector trimmed and center area,

    [​IMG]
     
    Cut4fun, Oct 3, 2015
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  8. lukem

    lukem

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    Thanks guys.
     
    lukem, Oct 3, 2015
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  9. Cut4fun

    Cut4fun

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    Without carb retune the above saw picked up 1000rpm. So make sure to retune.
     
    Cut4fun, Oct 3, 2015
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  10. Adirondackstihl

    Adirondackstihl

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    [​IMG]

    [​IMG]

    [​IMG]
     
    Adirondackstihl, Oct 3, 2015
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  11. lukem

    lukem

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    Loud?
     
    lukem, Oct 3, 2015
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  12. MasterMech

    MasterMech The Mechanical Moderator

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    The last one I did was similar with the dimple removed but I did not drill the deflector and I left the screen in.

    Yeah, it was friggin loud.
     
    MasterMech, Oct 4, 2015
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  13. Adirondackstihl

    Adirondackstihl

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    WHAT?
     
    Adirondackstihl, Oct 4, 2015
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  14. lukem

    lukem

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    My dad has decided to forego the muff mod and buy a 440. Can't argue with that logic.
     
    lukem, Oct 5, 2015
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  15. Bowtie

    Bowtie

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    That muffler mod Cut4Fun posted really wakes these saws up.
     
    Bowtie, Oct 5, 2015
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  16. Horkn

    Horkn

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    How is that mod sound wise? My 029 super is a great, reliable saw, but using my buddy's 460 back to back makes me want more. It just feels bottled up stock.
     
    Horkn, Oct 5, 2015
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  17. MasterMech

    MasterMech The Mechanical Moderator

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    How noise tolerant are you?

    Cut the deflector like Cut4Fun's pic shows, remove the dimpled area and slap a screen in it. It will sound awesome. It'll be loud for sure but not as obnoxious as you might think. I know plenty of vintage machines that are worse.

    Of course it would respond dramatically to just a 3/8 hole drilled dead center too because your feeling is right. These saws are definitely corked up.
     
    MasterMech, Oct 5, 2015
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  18. Horkn

    Horkn

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    If the regular 029 is corked up, the added displacement of the super model probably is basically wasted, if the muffler is the same that is.

    Noise wise, I love the sound of a nice tuned 2 stroke, so I'm fine with that. I just wouldn't want earplug mandatory noise.
     
    Horkn, Oct 5, 2015
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  19. MasterMech

    MasterMech The Mechanical Moderator

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    The 029?! Lol, the 390 is the worst offender. Same muffler, just another 20cc.....

    (Edit: dunno what I was smoking. Only another 10cc from the 029)
     
    Last edited: Oct 6, 2015
    MasterMech, Oct 5, 2015
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  20. MasterMech

    MasterMech The Mechanical Moderator

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    For your listening enjoyment. No dimple, just a screen and deflector.
     
    MasterMech, Oct 6, 2015
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