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Tree Monkey 461 R&D muffler tests

Discussion in 'Chainsaws' started by Redbull661, May 13, 2019.

  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
  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 Super 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. sawmikaze

    sawmikaze The 462 is light

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    Everyone is gonna have a quad port MUFF on their 461s now.
     
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  15. 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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  16. 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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  17. 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.
     
  18. 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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  19. RI Chevy

    RI Chevy DollyKitaStihlvarna Runner

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

    MustangMike Mastermind Approved!

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    Jeff, I can feel the difference in torque, which I'm sure would translate to cut times.

    I'm sure the best running saws will have very open mufflers, as mine do, but it does not work on every saw.

    If you want, I'll bring some mufflers for testing at the CT GTG, and I'll let your or Mason or Dan run them so no one cries foul.
     
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