ArboristSite.com Sponsors
 
 


1 inch diameter pipe to much

Discussion in 'Chainsaw' started by o8f150, Nov 17, 2010.

  1. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    going to do a muffler mod on my 600p,,was wondering if a 1 inch inside dia pipe be to much or to little for it,,,i am not going to do a port job on it,,just mod the muff,,,,this stock muffler is a stupid setup,,,,exhaust comes into muffler,,goes through baffeling,,makes a hard turn into a pipe to the outside of the muff and deflector forces it to make another hard turn,,,,picture a big z,,,so i know if i make a direct route it will breath a whole lot better
     
  2. pioneerguy600

    pioneerguy600 Tree Freak

    Joined:
    Dec 23, 2007
    Messages:
    29,587
    Likes Received:
    4,142
    Location:
    N.S. Canada
    What is your total area at the cylinder exhaust flange? The total area of the muffler exit can match if you are retaining the spark screen, if you are not retaining the spark screen then a muffler port around 85% of the flange size works well on a non ported saw.
    Pioneerguy600
     
  3. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    i just got done taking it apart and measuring,,,,the factory exhaust exit tube in the muffler is 3/4",,the widest part of the exhaust flange is 1" and it tapers back to 3/4" next to the piston,,,so i am figuring to just go with 3/4" inside dia pipe out the front of the muffler and block off the orginal exit port since it exits on the top of the muffler with a deflector,,question is would i be wrong to do it that way??? the reason to do this is give the exhaust a straight shot instead of going through that stupid z setup,,,i know i am going to leave the baffling in,,well maybe drill out some of the holes,,
     
  4. T_F_E

    T_F_E ArboristSite Operative

    Joined:
    Jun 29, 2010
    Messages:
    215
    Likes Received:
    39
    Location:
    Great falls mt
    1 inch would be bigger than a lot of those imports :hmm3grin2orange:
     
  5. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    i know what you mean,,my wife has an 08 focus and i think the exhaust pipe on it is only 1 1/2",,guess you don't need anything bigger for the hampsters to fart through,:hmm3grin2orange::hmm3grin2orange:
     
  6. pioneerguy600

    pioneerguy600 Tree Freak

    Joined:
    Dec 23, 2007
    Messages:
    29,587
    Likes Received:
    4,142
    Location:
    N.S. Canada
    I agree with going with a 3/4" outlet in the new position, if you can put a couple of new holes through the partition or baffel then even better.

    Pioneerguy600
     
  7. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    ok,,now i know what to pick up tomorrow,,,thanks
     
  8. mtngun

    mtngun Addicted to ArboristSite

    Joined:
    May 5, 2008
    Messages:
    4,625
    Likes Received:
    456
    Location:
    where the Salmon joins the Snake
    The existing single port can easily be opened up to about 1 square inch. The baffle can be removed or ventilated. That satisfies the 85% rule, anything else is just more noise.
     
  9. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    as you can see by the drawing by following the arrows there is 2 sharp turns for the exhaust,,that why i said before it is a z formation,,i am going to take all 2 turns out and go straight out the front,,,

    [​IMG]
     
  10. PLMCRZY

    PLMCRZY Addicted to ArboristSite

    Joined:
    Jul 3, 2010
    Messages:
    2,921
    Likes Received:
    331
    Location:
    Texas
    Now that is the crappiest drawing i have ever seen! Lol, i would do 1/2 but thats just me. My poulan is gonna get 1/2 maybe 3/4 not sure when i muffler mod it. Just got to wait til monday :)
     
  11. wigglesworth

    wigglesworth Booned

    Joined:
    Oct 5, 2008
    Messages:
    7,761
    Likes Received:
    2,314
    Location:
    West kentucky
    I would think that 1" would be pretty big for a 60cc saw. I would think that 3/4" would be more than enough.

    Definetly gut that junk out of the muffler too.
     
  12. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    the way i am going to do it just about everything will come out
     
  13. PLMCRZY

    PLMCRZY Addicted to ArboristSite

    Joined:
    Jul 3, 2010
    Messages:
    2,921
    Likes Received:
    331
    Location:
    Texas
    I would use 1/2 or 3/4 i really think 1" is way to big.
     
  14. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    the factory exit is just a hair under 3/4,,,it will be covered and welded with a piece of flat metal,,,,the exit now is 3/4" and i drilled an 1/2" hole through the baffel right in line with the exit hole,,and left the holes in the baffel the same size,,,,just need to weld everything up and i will almost have a direct exit,,should give it a bit more power,,,will post a few picks when i get it back together
     
  15. PLMCRZY

    PLMCRZY Addicted to ArboristSite

    Joined:
    Jul 3, 2010
    Messages:
    2,921
    Likes Received:
    331
    Location:
    Texas
    I bet its gonna be loud as sin! Post up a video to of it.
     
  16. sunfish

    sunfish Fish Head

    Joined:
    Jul 12, 2010
    Messages:
    10,102
    Likes Received:
    4,838
    Location:
    Success Missouri
    A direct exit may not be best for a 2 stroke, that why most put the new outlet on the side. Another reason for side outlet, is when the front of the saw is up against a log.
     
  17. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    after all said and done,,,the inlet side is at the top of the muffler,,and the exit is at teh bottom of the muffler,,so the exhaust is not going straight through,,it has to travel to the lower side of the muffler to exit through the baffel,,,i had figured it was straight through but it isn't
     
  18. o8f150

    o8f150 Tree Freak

    Joined:
    Jan 24, 2010
    Messages:
    14,356
    Likes Received:
    3,611
    Location:
    western ky
    here is the finished product after modding,,thanks to dhibbs75 for finishing the welding and the finish work for me,,,,,,this thing sounds wicked,,has more torque as you can see by the video,,,,it is louder i know that,,,can't wait to get it into wood tommorrow,,,,,here is 2 pics and a short video,,,i closed off the factory exit and made the mod exit just a hair over 3/4 inch,,i gained about 10% exit and no more of that stupid z pattern,,

    [​IMG]
    [​IMG]

    <object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/MoRJK8D0XAo?fs=1&amp;hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/MoRJK8D0XAo?fs=1&amp;hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>
     
  19. PLMCRZY

    PLMCRZY Addicted to ArboristSite

    Joined:
    Jul 3, 2010
    Messages:
    2,921
    Likes Received:
    331
    Location:
    Texas
    Man that thing sounds wicked idling! Get a video of it tmrw going thru wood please! I still want a 600p im drooling over you photos and videos!
     
  20. wigglesworth

    wigglesworth Booned

    Joined:
    Oct 5, 2008
    Messages:
    7,761
    Likes Received:
    2,314
    Location:
    West kentucky
    Keep a fire extinguisher near by....
     

Share This Page