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Husqvarna 550xp pop up

Discussion in 'Chainsaws' started by WoodsliverDan, Dec 4, 2018.

  1. drf256

    drf256 Dr. Richard Cranium (“RC” to Muh pals)

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    Never personally modded a 550 muffler. I’ve been told that many of the new husky mufflers are a Bear to modify.

    There’s a way to get flow and some quieting effect, but you will lose some performance. You’d have to add internal baffles to make the noise hit other areas and give it time to cancel itself out.

    If you can look through the inlet and see the outlet it’s generally not great. Part of why I dislike open front covers so much.
     
  2. Czed

    Czed Mastermind Approved!

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    You don't know what loud is until you run
    A gutted echo 590
    Check out one of the many oil threads
    For info
    Everybody has the best oil out there.
     
  3. huskyboy

    huskyboy Sorta a Husqvarna guy.

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    +1 those are pretty loud
     
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  4. Red97

    Red97 Mastermind Approved!

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    +2

    Something bout them.

    Crazy loud.
     
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  5. Adirondackstihl

    Adirondackstihl Vert Da Furk........Bork Bork Bork

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    Round exhaust port?
    I know a 670 I had on my bench a while back had a round port. Looked pretty badazz
     
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  6. WoodsliverDan

    WoodsliverDan Mechanical Beaver Builder

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    I will get them on here soon..
     
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  7. Chainsaw Jim

    Chainsaw Jim CJ Saws, LLC

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    No, those numbers you posted already. I was surprised to see 9° blowdown. The transfers damn near open with the exhaust.
     
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  8. MG2186

    MG2186 Pinnacle OPE Member

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    Hey Backtroller what’d you do with that muffler? I told you I’d get you a stock one for it, hate to see it just laying on a bench or something.
     
  9. huskihl

    huskihl Sausage Fingers Forever

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    550 and 562 are both like that. I've come up with I think 10° on both of them
     
  10. mortalitool

    mortalitool aka Nick Stoeckel

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    So...are you thinking about neuterizing the stratos? Let some fuel in there? maybe...maybe not???
     
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  11. WoodsliverDan

    WoodsliverDan Mechanical Beaver Builder

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    What do you mean?
     
  12. WoodsliverDan

    WoodsliverDan Mechanical Beaver Builder

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    Yup, but the first few degrees is the strato dump, so I guess you could say it's a bit more..
     
  13. Red97

    Red97 Mastermind Approved!

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    He is talking about connecting the strato ports and intake some/all the way.

    Getting fuel mix in the strato ports.
     
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  14. WoodsliverDan

    WoodsliverDan Mechanical Beaver Builder

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    Probably not right now..
     
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  15. WoodsliverDan

    WoodsliverDan Mechanical Beaver Builder

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    Got my gears turning now. Might have to try that in the future..
     
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  16. Backtroller

    Backtroller Pinnacle OPE Member

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    It’s with the saw and from what I hear the new owner loves it. I have to say the Craftsmanship on it was top notch and it did help power
     
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  17. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality

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    About the only thing I can think to say about a modded muffler other than it does help gain power, is if the outlet is aimed away on the off hand side of the saw from the operator, he or she will not be affected near as much.
     
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  18. MG2186

    MG2186 Pinnacle OPE Member

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    Ok good to know, I’d gladly trade a stock one back for it if it wasn’t being used. These dam auto saws are loud though with the muffler opened up, ear piercing loud! I wouldn’t think to run them without hearing protection
     
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  19. mortalitool

    mortalitool aka Nick Stoeckel

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    Yepp.

    Sent from my SM-G935P using Tapatalk
     
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  20. wcorey

    wcorey Pinnacle OPE Member

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    With the stratos having a separate throttle body on this saw, how do you go about getting fuel over from the carb/intake?
     
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