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Tree Monkey 461 R&D muffler tests

Discussion in 'Chainsaws' started by Redbull661, May 13, 2019 at 10:59 PM.

  1. Redbull661

    Redbull661 661 hoarder (BlueBallz)

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    Scott just finished porting this one and figured we'd try some different muffler combos.

    7pin, 28" tsumura, 28" 063 3/8 stihl full comp square

    Nice 2 second gain in the cant. :)

     
  2. dall

    dall Soon to be banned fart knocker.

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    you really need to sweep for scott before he falls
     
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  3. Deets066

    Deets066 AKA Deetsey

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    Poke some more holes in it then...
     
  4. Shanesaw80

    Shanesaw80 Tree Assassin

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    That thing is awesome!!
     
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  5. andyshine77

    andyshine77 Pinnacle OPE Member

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    Good stuff! It's nice to see guys still at it, adding new info. These results back up Timberwolves findings from, I don't know 07 or so. At that time "if I remember correctly" he saw gains with mufflers open up to 120% the exhaust port area. However the gains from 80% up or so weren't much, but noise sure increased. So for the most part if you want power, go big! lol. Not sure how this effects strato engines, I would expect there to be a difference with Strato engines.

    For those who weren't around at the time Timberwolf was the real deal, he totally engineered things from a scientific and experimental standpoint, he even had a working dyno he made. The good old days.
     
    Last edited: May 14, 2019 at 5:29 AM
  6. drf256

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

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    Great test Julian, as usual. Thank you for sharing.

    I’m not sure why people think smaller outlets will help power in a mufflered saw. I get it on a pipe.

    It’s all about sacrificing noise for power.

    It would be cool as hell to have seen what a decibel meter woulda said for each one. I bought one for testing (they are cheap-actually bought to see what decibel my in-laws reach at gatherings) and as usual, haven’t had the time to play.
     
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  7. Stihl Potlicker

    Stihl Potlicker Well-Known OPE Member

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    it's padding, those saw are such strong :coleman: it practically has @tree monkey doing a head stands
     
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  8. Cut4fun

    Cut4fun Redneck Chainsaw Repair

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    I saved all that info with pics in a thread. Before it was lost. Thanks for the reminder.
     
  9. Cut4fun

    Cut4fun Redneck Chainsaw Repair

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  10. srcarr52

    srcarr52 We can't stop here, th1s is bat country!

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    Quad port... sheesh! You should have made a cut without the front cover.
     
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  11. deye223

    deye223 Super OPE Member

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    Hmmmm I wonder if this will work on a stock 461 with just a timing advance ......
     
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  12. andyshine77

    andyshine77 Pinnacle OPE Member

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  13. ferris

    ferris Pinnacle OPE Member

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  14. Redbull661

    Redbull661 661 hoarder (BlueBallz)

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    No, @tree monkey did not. Think he checked it a couple of times in the wood and it was fine.
     
    Last edited: May 14, 2019 at 4:19 PM
  15. sawmikaze

    sawmikaze Here For The Long Haul!

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    Everyone is gonna have a quad port MUFF on their 461s now.
     
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  16. drf256

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

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    Did the brake handle need to be relieved to clear the top deflector?
     
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  17. MustangMike

    MustangMike Mastermind Approved!

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    Impressive results, but I would caution against applying them to all saws.

    TM is expert at porting saws, and his saws need all the flow they can get.

    I have a few saws that lost torque when I opened up the mufflers too much. Since I like to lean on a saw, I changed them back.

    I believe that each saws has a sweet spot that will depend more on it's porting more than on any formula. (will depend on cylinder porting and ignition timing)

    Also, I believe TM runs screens on all his ports??? (that would reduce flow about 50% compared to the unscreened ports some builders use?)

    I put on my Motorcycle Helmet and lowered the face shield to prepare for the backlash!
     
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  18. blsnelling

    blsnelling Friend of the Riff Raff

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    I'm of the opinion that a muffler should simply be made to flow. These aren't tuned pipes. Open it up based on your tolerance of volume. I haven't measured exhaust area in nearly a decade.
     
  19. RI Chevy

    RI Chevy DollyKitaStihlvarna Runner

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    Did you just go by feel Mike? Or did you do timed cuts for your testing?
    @MustangMike
     
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  20. RI Chevy

    RI Chevy DollyKitaStihlvarna Runner

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    Excellent tests. Thanks for sharing.
    Time first some new oak cants.
     
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