Chainsaw Log DYNO? Is it telling TRUTH? HM PIPE vs Can ported Muffler!

Homemade mini saw pipe vs a stock style, dual port chainsaw muffler. I’m a little confused by the results. Possible carb tune in between may have been all the difference. Might have to revisit this idea in the near future.

[@frankz1125]

I think tuning your saw to the pipe will make a difference. Cheers

[@kygunworks4982]

I like cans mostly, when it took no carb adjustment I figured it would be pretty close, normally better flow will make them run richer, muffler mods really woke up my 55 and 350

[@julianlaustsen1991]

sounds like it could use a carb adjustment, it's running rich.

[@robertshoemaker6204]

I like the can sound, pipe was okay. My concern would be the pipe is dangerous to run in dryer weather....sparks cause fires.. that my two cents.Shoe in SW Oregon.

[@robertdouglas3456]

Great job young man

[@tfloutdoors327]

Thank you!

[@pacificnorthwestliving8607]

Different sound... as soon as it waz running. SMILES

[@kingsaws]

Just subscribed man nice muffler

[@toast47624]

Nice Pipe. I'm building a 372 muffler now. It has about the same taper. I'll cut out the flange from a stock muffler and then weld in my new flange and taper cone. It will look totally stock when finished pretty much.

[@tfloutdoors327]

Thank you! I like your idea with the stock can, I’ve been thinking about different ideas similar to yours, in fact I recently just modded a stock can a few weeks ago, I tried to keep it modest with a stock appearance too. Hopefully it turns out good, Thanks for the comment, happy cutting!

[@york806]

Like that pipe, more, more..

[@VinnyMartello]

This issue with the homemade side pipes is that most of us don't have a solid understanding of the Cadenacy Effect and the importance of back pressure on 2 stroke engines. A 2 stroke is very very different from a 4 stroke and a purely free flowing exhaust isn't ideal. But an out of tune expansion chamber is worse. Both probably better than stock, but if youre gonna make a side pipe you need to know the appropriate length of the chamber.

[@eurokid83]

The back pressure thing is a myth that a lot of people still believe for some reason. Less back pressure equals more performance period. Two or four stroke doesn’t matter. Never heard of cadence in internal combustion engines, I think what your referring to is pressure wave tuning. Without doing some complicated math there’s no way to tune these “iron horse” pipes or any other pipe to work on a saw. A properly modified can/factory muffler in general will perform better than any homemade “pipe” unless we’re talking about properly made/tuned resonators.

[@VinnyMartello]

@@eurokid83 I didn't entirely misspell that word. Its called the Kadenacy Effect (after the engineer who discovered it) and it has to do with pressure waves and timing. The exhaust situation is VERY different for two strokes and four strokes. Thats why you see expansion chambers on 2 stoke dirt bikes and straight pips on 4 stroke. You need pressure waves timed to force fuel and air back through the ports of a 2 stroke for best performance.

[@eurokid83]

@@VinnyMartello yes the Kadenacy effect explains the effect of a properly timed negative pressure pulse used to scavenge a cylinder for example. Two stroke pipes are resonators and use sound waves to accomplish essentially the same thing. There may also be a pressure wave effect but I believe it’s primarily a sound wave thing. I’m not a engineer or mathematician but I have a better than average understanding of two and four stroke engines.

[@toast47624]

My observations of my own modified pipes/muffler tends to support Barry the chopper. But like you I believe there is a sweet spot to be found. I'm not a fan of super low backpressure muffler mods. I think they drink fuel and do little for power. A little less back pressure than stock is my current sweet spot. Just building a can muffler now that effectively has this pipe inside a can. I was recently sent a pipe...in fact 2 from 2 different guys. Neither went as good as my muffler mod. The Novice Lumber Jack on YT did a pipe a year ago and the seemed to really work. It can be done.

[@kristmadsen]

Project farm had a good way of testing cutting speed in his chain video

[@tfloutdoors327]

Haven’t seen that vid, I just I’ll have to check it out! Thanks for the comment!

[@jtrocktree5409]

You really draw the 2 cycle mochanic's to this video, i love my old 1 and 2 series huskies , but i personally have to stay in the loop with the 572 and 592 . Auto tune and fuel injected , 💉 😅 keep tinkering and work safe, loved the video 📹

[@mikemurphy2928]

Someone correct me if I'm wrong, I thought a more open free flowing muffler made a saw run a little lean compared to stock, so usually after a muffler mod the saw needs to be richened a little bit to compensate. The second lots of cuts with the pipe sounded a bit richer indicating to me it is more restricted than the twin port can.

[@tfloutdoors327]

Correct! Most of the topical muffler mods to stock can mufflers normally makes the saw run lean. I thought the same with the pipe that it was four stroking a bit more than the canned muffler in the second cuts as well. That’s why I didn’t do a carb adjustment between the two. They say if the pipe makes the saw go rich, then it’s actually working better than the other muffler.

[@rpetersen709]

Agreed if the pipe makes it go rich you’re onto something, but tune with the pipe was definitely what hurt the cut time. Saw seemed better tuned to the modded stock muffler. I think you may have seen a totally different result if you had taken the time to tune it. It is also hard to tell for 100% sure on video if it was more rich than the can, given the totally different sound. so really you being the one there is the one that could tell. Good video though.

[@toast47624]

@@tfloutdoors327 I would agree.

[@captaintyingknots9027]

The saw was pig rich as soon as you swapped to the pipe. It was four stroking and barely cleaned up under load. That’s a sign that the pipe is working, you just need to lean out the high jet a bit and that pipe will scream. Nice build on that pipe

[@tfloutdoors327]

Thank you! I appreciate it very much my man!

[@forestman_dan]

Did you tune the carb for each muffler? If one muffler makes the saw run lean, it will run much higher rpm and will pull that chain faster

[@tfloutdoors327]

Did not tune the carb after pipe swap, want to see if the pipe changed anything, for the good or bad, seemed to be slightly 4 stoking a bit more running the pipe in the cuts under load, yep thats why i thinking it wasn’t a loss for the pipe, could have leaned it up a tad 👍

[@diggindiggenit6540]

I missed what model saw that is your using, sounds terrific

[@tfloutdoors327]

Thanks, I love that saw, it’s a ported 372 hybrid, with a big bore kit top end.

[@StumpShot]

Only way that the pipe wins is if it's in perfect tune with the saw motor, which is near impossible to hit apon. This the empty can wins more times than not. If that pipe is to be used for any length of time, a support bracket should be fabricated, so as not to pull on the threads on the cylinder. Interesting take in the pipe though, I liked where you were going with it. Never know when you might hit upon a good thing, maybe some tweaking of the design is in order...

[@ryanlindsay5010]

Glad to see a full wrap and longer bar on your saw, watch alot of videos with the half wrap and tiny bar, kinda disappointing.

[@tfloutdoors327]

Thanks man!

[@vikingnorm6935]

I liked the pipe better than the can, they were both cool though

[@JohnWilliams-junglejohnny]

Definately makes motor run cooler and heat kills so

[@bennyblanko3]

Cool, thanks for the video! Pipe looked faster. Where did you get that left handed chainsaw? Heh heh. You tune like me, when cutting big wood or noodling big rounds. A little fat, but at least the saw doesn't burn up. Less difference between the two than I would have thought.

[@tfloutdoors327]

Hey thanks for watching my left handed saw vid and for the comment too, I believe with a few little tweaks here and there the pipe will most likely be faster.

[@dentondunn4346]

When s pipe instantly makes a saw rich it's working but it needs leaned out to get the best performance.

[@stuartramage5933]

peace an love from scotlnd.

[@tfloutdoors327]

Thank you! Much love brother🙏

[@SCouch-cw6je]

My question is why is the clutch on the left side? Is it just my eyes or is it a left handed saw

[@tfloutdoors327]

It’s a left handed vid! Your not the only on one that has noticed it, guess it slipped on the edit🙄

[@SCouch-cw6je]

@@tfloutdoors327 so is the saw a left handed saw I’m confused?

[@tfloutdoors327]

No it’s not a left handed saw. The camera was on selfie mode, some idiot forgot to fix that in the edit. That would be me! It flips everything, if you notice the print on my shirt is backward also. I don’t think that husky has ever made a left handed clutch cover saw. Sorry for all the confusion, thanks for the comments and for watching my left handed video. Cheers!

[@vascopires2045]

is that a left handed saw i noticed the bar is on the left side

[@tfloutdoors327]

The only one in the states apparently! 👀👊😂

[@vascopires2045]

@@tfloutdoors327 that's cool at least now i know i wasnt seeing things

[@mattfleming86]

@@tfloutdoors327 Well then, fuck. I had to spend a lot of hours training my lefthanded self to be mostly right handed (along with buying all those full wraps) and now they just MAKE a lefty. :-D Nice video dude. Unless you are dipping into (impractical) tuned pipes they all make kind of similar power unless poorly made (i.e. way too open) Power bands might be in different spots.. some a little higher hp.. some a little lower hp.. Seems to me that as long as you aren't running one of the newer super-choked mufflers or, poor homeowners, one with a cat, a good mod OR pipe will help get heat out and give you a little more grunt. I personally prefer a modded muffler, as I can incrementally open until I get the noise level i'm comfortable with. At the point where my brain is saying "yeah that's still pretty comfortable" I've managed to squeak out a decent amount of chooch. With MOST saws a decent exhaust modification, a compression increase, a good tune, and a sharp chain will make a hell of a worksaw.

[@Suaneslopez]

Bro ever heard of selfie cam ?

[@dustinsmith4651]

Would you be interested in building a muffler for me ? something a bit different than what you have now.

[@tfloutdoors327]

Sorry bud, this is just a hobby thing for me at this time, I appreciate the offer though!👍 just goofing around with different stuff in my spare time when I get it.

[@nicholasbehnke4421]

When you put a pipe on a chainsaw you got to adjust the carburetor cuz it's running way too rich

[@robertlivingston1634]

Never seen a left handed Husky

[@tfloutdoors327]

It’s not, forgot to flip the clips, while editing 🤦‍♂️

[@thomasgunne8730]

Chain was not touched up and you cut different technique with the two exhausts, just sayin'.

[@chevypu35]

look up 4 stroking on a saw and re-tune and retest the pipe was too rich and 4 stroking and needed to be leaned out

[@RichFife]

Shorter stinger and larger diameter hole.

[@RichFife]

1" hole is a safe start... 1-1/4" if you're using a medium screen. On these 2 strokes, finding the correct can volume to stinger size/length can be time consuming as A lot of timed test cuts will be needed. The vintage saws have pipes inside their cans with minimal stick out... but, they were more geared towards torque in a specific powerband. Newer saws are geared towards more speed with ok/decent torque. Find out the cutting rpms and then figure your cylinder volumes, air transfers (in/out) and then dabble in the mystic arts of tuned exhausts with trial and error. Or just Google formulas used to calculate all of this... lol. ORRR.... find a vintage saw scale up their exhaust and add 40% to the calculations. Lol

[@ocsplc]

What chain you running?

[@tfloutdoors327]

.063 Stihl skip, on a tired ass bar set up that needs to be retired

[@justinstclair5707]

that pipe is just a little small imho, possible open exit airway up or add another side exit the shape itself looks great

[@EcSsAwS]

You would have gotten better results with the knockoff ironhorse muffler. IF the end didn’t flare out so much and lose velocity Also. That’s a pretty long outlet on that pipe. Mine are under 1” long I can also tell. Because you did no carb adjustment. That pipe is doing NOTHING If the pipe is working like it’s supposed to. The saw will INSTANTLY be pig rich on idle and high circuit

[@tfloutdoors327]

Just having fun messing around trying different ideas

[@evanmiller1642]

I wouldnt touch an iron horse saw or muffler to save my life. Great job building and testing these exhaust

[@ocsplc]

How can I buy one of your cool mufflers?

[@tfloutdoors327]

This is a hobby for me, trying to test different things in the saw world, still figuring stuff out bud! I realize that not everyone can build a diy pipe, but I have a vid on how to build it, all the details included there, just sharing some of my ideas with everyone . Thanks for the comments! Much love 😎

[@ocsplc]

@@tfloutdoors327 no problem brother. I’m kind of doing the same but I’m not quite at your level of experience yet. Thanks

[@kowski9477]

That saw don't mess around!

[@kingsaws]

What kind of wood is that

[@tfloutdoors327]

I couldn’t tell you, I know it’s a fast growing type, that draws a ton of moisture, heavy when first cut, then drys fast, and become light, definitely not a hard wood!

[@kingsaws]

@@tfloutdoors327 resembled sycamore

[@srankin8022]

The way you run the saw will probably make more difference than the mufflers will. If you just lay that saw up there and let it cut straight thru it will cut faster every time than rocking it over the top and cutting the back side. Rocking it over just fools the mind into thinking it's faster because you're moving and staying busy. Lol You had plenty of bar length to cut straight through. The quickest way from point A to point B is a straight line. Time the two different styles of cutting sometime and prove it to yourself. When you are rocking the saw around it quits cutting for a few seconds while a saw staying in the cut doesn't give up a second.

[@tfloutdoors327]

So many variables my friend, from one cut to the next, saw placement, human error in the cuts, saw tune up, raker depth’s, moisture w/in the actual wood, and so on. So debatable, which make testing a particular replacement part on a saw so difficult in real life senecio. Kinda the point of the vid was to try to make similar cuts with both pipes w/o tuning in between, not to cut the log in the fastest way possible. Great point, could have just cut straight through, for sure but didn’t, thank you for your comment, and watching my video! Cheers!

[@travisweldmaster7815]

Dual ports sound good but dont preform

[@Faolan161]

Pipe sounded great! Maybe put in a screen for sparks... I think with the pipe, it flowed more air and fattened it up, making less than optimum power. I suspect the pipe might be faster tuned than the can tuned... Fueling is sensitive on small 2 strokes.

[@tfloutdoors327]

Thanks ! I believe one could slip a screen down the inside of it, that’s a great idea!

[@gwp1ohio]

if you are throwing sparks then you have problems...

[@Faolan161]

@@gwp1ohio ever seen flames from a hopped up car exhaust? 2 strokes end up pushing fuel into the muffler at times, especially when massaged for extra pull... It is possible, while not throwing sparks from grinding internals... which surely would be a bad day...

[@clintbliss2046]

If you don't tune to the different exhaust the test is invalid

[@gwp1ohio]

4stroking...

[@kraftzion]

Do you want to sell that pipe?

[@tfloutdoors327]

Nah, wasn’t planning on it, thanks for the comment and watching my video! 👍

[@lenness6689]

Can has too big of outlet total area

[@kylecromp319]

The saw is pig rich. Turn your high jet in. Its blubbering in the cut terrible.

[@tfloutdoors327]

Yes sir!!

[@phoenixtimber4343]

Running a saw lefty ain’t safe. You’re just living your life in the kickback zone. A good cutter is ambidextrous but predominantly righty with the arc of the cutback potential on the right of the body. At the minimum you should wear a face screen if you’re running a saw backward. Sorry they don’t make lefty saws.

[@kramerkid02]

If you look closely, you'll notice this actually is a lefty saw. The bar is on the opposite side of his body throughout the video, so he's in the right spot as a lefty. I noticed his shirt is printed backwards, too, and he wrote the times on the paper toward the end in Russian. Either that, or the whole video is inverted....

[@tfloutdoors327]

Sure about that? Lol! Left equals right on Opposite Day!

[@robertalexander4989]

Knock on wood I've never been cut lefty and have ran for fifteen years

[@johnbaptist1928]

He’s not. The video image is flipped. Look at the writing on his shirt at the end of the video, it’s reversed. The saws hanging in the back ground are also reversed. Good catch though!

[@kowski9477]

I actually thought the pipe looked faster