Agreed as well. You're the only chanel I've found that puts consistent effort into saw testing and comparisons that matter! And they're aren't ridiculous comparisons of two different port jobs on two different size saws cutting for time. It's one saw, one test, with different variables. Keep this going!
Where did you attach the T/C lead? On what part of the saw is it measuring temperature? There are some cheap T/C meters that could be easily attached to the top shroud to monitor engine temp while milling. If your willing to share your experience it would help pinpoint a good spot.
Just curious on the on the temp is that cylinder temp or cap coming out of exhaust muffler been trying to source info on exhaust temps can never find anything For chainsaws great video keep them coming keep chips flying
Hello, could you please tell me where I can buy the port openings you installed on your muffler? Great educational video. I have a Ms661 and would like to modify the muffler like you did. Grat example of what can be done.
I believe it's a husky 2nd port. Most saw shops carry em. They're about 30 ish$ at least where I'm at. Or check out west coast saw's bark box. They're about 80ish delivered. Don't have to cut your muffler and they look and sound mean!
I've tested that idea a lot over the years and the only times I've seen it needed are entire carb change, solenoid change, coil change or if your messing with the timing. Scott aka tree monkey has done all sorts of changes to port timing and the mtronic always tunes itself right away. And I mean if you think about it, it has to be able to adapt to all these various conditions or the saws would burn up in no time. So I guess it makes sense that the mtronic can account/retune for a port timing change or a change to the air filter or change to muffler.
well no idea for sure. but I would guess that by running cooler that is more eff. and may be better than stock? I can tell ya this. It's a heck of a lot better than my old 660s!
Seems like just removing the stock screen and leaving everything else alone is the best mod for the money. You picked up over 2 seconds on the stock average with that alone. Wish you had been able to do a second cut to see the consistency. It was only about 1 second off of the best time for the dual port.
tree monkey and I have done so much testing with that idea. With the older 4701A coil and reset it would have been in my opinion counter productive to do it. Because the reset actually resets to factory specs on the carb and the carb has to relearn and IMO it takes more than 5 cuts to do so. Now with the new 4702A coil gen 3 "calibration" I think it would be good thing to do a calibration after each change because the calibration procedure calibrates the saw for the best tune based on current inputs...thus the new inputs (changes to muffler).
If I remember correctly you and Scott kunes are friends? I tried to call him months back. Never heard from him. I also heard he had some health issues? Can you tell me if any of that is true, and is he still working. He ported a ms660 for me, and was interested in getting another possibly ported? Thanks, Ronnie, East Tennessee,
Thanks for the reply. I got an aftermarket exhaust which didn’t have the port on the top and I made it into a duel port on the front. I still have the exhaust that came with it with the single hole on the top, so I’ll have a dabble at making that one larger. How much bigger would you go with it?
Side ports are always better. You don’t want exhaust shooting straight out of the muffler from the cylinder. You want it to hit the front of the muffler and push out the side
Saw Greater, hello bud. I made the muffler with just the outlet on top and made it bigger. The saw defo seems to go better! What would you do to the saw to give it more low down torque?
@@wizzylizzy69 I've already got a 661. I'm just wanting more power from my 391, but I might sell it to get a 462 or 500i. It depends on how my funds are doing when I make that decision.
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There is no one on youtube that puts so much effort in saw testing as you do,
thank you sir
Agreed, I really enjoy watching your clips
Agreed as well. You're the only chanel I've found that puts consistent effort into saw testing and comparisons that matter! And they're aren't ridiculous comparisons of two different port jobs on two different size saws cutting for time. It's one saw, one test, with different variables. Keep this going!
Graham Deere yea, lots of data and consistent testing is what matters.
So cool to see how it heats and cools as it happens.
Good work, great to see proper testing!
thank you sir.
Can I ask exactly what you did to the final mod-tri port. I assume the ports were on the side as you said that was best for the 661
Wow! Just the money spent on all those chains. Sheesh! Good Job and thank you!
thank you sir.
Good work thanks ... now where do I find a triple port for my 880 ?
Brand new chain into blue wood..brave man indeed...do it for science haha.
make that 5 brand new chains. :) in the name of science!
Real data. I agree. Dual ports with the side port is the best combo. Bark box's and strait shots are junk.
That sure is a smooth cutting saw, you've got her tuned just right.
You know it tunes itself aye?
By changing the exhaust and freeing it up you should re tune the saw because you may be to lean and by adding fuel the saw will run cooler
It is an M-Tronic saw, it tunes itself.
Hey where did ya get the black handle side support? Thanks
Where did you attach the T/C lead? On what part of the saw is it measuring temperature? There are some cheap T/C meters that could be easily attached to the top shroud to monitor engine temp while milling. If your willing to share your experience it would help pinpoint a good spot.
As a follow up, my idea is to use a type K wire somewhere near the exhaust port on the jug.
Just curious on the on the temp is that cylinder temp or cap coming out of exhaust muffler been trying to source info on exhaust temps can never find anything For chainsaws great video keep them coming keep chips flying
ring under the spark plug
We’re can a guy get those deflectors for doing his or her own muffler mods ?
Hello, could you please tell me where I can buy the port openings you installed on your muffler? Great educational video. I have a Ms661 and would like to modify the muffler like you did. Grat example of what can be done.
I believe it's a husky 2nd port. Most saw shops carry em. They're about 30 ish$ at least where I'm at. Or check out west coast saw's bark box. They're about 80ish delivered. Don't have to cut your muffler and they look and sound mean!
Great video. Did you do the 90 second M-tronic recalibration after each successive mod?
I've tested that idea a lot over the years and the only times I've seen it needed are entire carb change, solenoid change, coil change or if your messing with the timing.
Scott aka tree monkey has done all sorts of changes to port timing and the mtronic always tunes itself right away. And I mean if you think about it, it has to be able to adapt to all these various conditions or the saws would burn up in no time. So I guess it makes sense that the mtronic can account/retune for a port timing change or a change to the air filter or change to muffler.
Where do I get one of those deflectors? Good video thanks. I just doubled the stock port size. I was thinking of adding a second.
Thanks. Does he have a website?
no sir. you can email me at ammotesting@gmail.com and I can hook you up.
Where did you get your triport muffler? Or was that something you made?
tree monkey aka scott kunz did it.
i would like to buy a tri port can u send me a link to purchase
Great but dose it need return as better flow ?? =more fuel ⛽️
well no idea for sure. but I would guess that by running cooler that is more eff. and may be better than stock? I can tell ya this. It's a heck of a lot better than my old 660s!
Seems like just removing the stock screen and leaving everything else alone is the best mod for the money. You picked up over 2 seconds on the stock average with that alone. Wish you had been able to do a second cut to see the consistency. It was only about 1 second off of the best time for the dual port.
yeah a very valid point. If it were me I'd open up the stock hole from 5/8" to 3/4" and use a wider weave screen. but that's me.
What brand of felling dogs do you have?
factory stihl. i painted them.
Really should have done reset between every one so it gave 100% unquestionable result the gains may have been better
tree monkey and I have done so much testing with that idea. With the older 4701A coil and reset it would have been in my opinion counter productive to do it. Because the reset actually resets to factory specs on the carb and the carb has to relearn and IMO it takes more than 5 cuts to do so. Now with the new 4702A coil gen 3 "calibration" I think it would be good thing to do a calibration after each change because the calibration procedure calibrates the saw for the best tune based on current inputs...thus the new inputs (changes to muffler).
Instead of adding all the extra ports can I just open the stock port all the way? Would it flow the same?
no. port would be huge to have the same amount of surface area/opening and then you would lose your back pressure.
I just thought of this, do a test between Stihl motomix and pump gas. Curious to see if there is any difference in power and running temp.
I have a gigantic oil and gas test planned...been in the works for about 2 yrs. hopefully this summer.
Have you tested the bark boxfrom WCS?
Из какой коры?
If I remember correctly you and Scott kunes are friends? I tried to call him months back. Never heard from him. I also heard he had some health issues? Can you tell me if any of that is true, and is he still working. He ported a ms660 for me, and was interested in getting another possibly ported? Thanks, Ronnie, East Tennessee,
Для чего вы их портируете???
Hello there. Have you found that a 390xp prefers a side port instead of a front port as well?
don't know sorry. never tested it. but that would be my guess.
Thanks for the reply. I got an aftermarket exhaust which didn’t have the port on the top and I made it into a duel port on the front. I still have the exhaust that came with it with the single hole on the top, so I’ll have a dabble at making that one larger. How much bigger would you go with it?
Side ports are always better. You don’t want exhaust shooting straight out of the muffler from the cylinder. You want it to hit the front of the muffler and push out the side
Saw Greater, hello bud. I made the muffler with just the outlet on top and made it bigger. The saw defo seems to go better! What would you do to the saw to give it more low down torque?
gerbutt porting. Base gasket delete would help some.
I see a lot of different opinions on doing a muffler mod on a 391, so would I have to redo the time on it with a muffler mod or no?
I’ve got a 391 with a dual port, made a big difference but I am still selling it and buying a 661
And he’s you had to re tune it
@@wizzylizzy69 I've already got a 661. I'm just wanting more power from my 391, but I might sell it to get a 462 or 500i. It depends on how my funds are doing when I make that decision.
What are those black marks on the wood from..?
The black marks indicate there is iron in the wood. Most likely from old nails or fence.
No bark box!?
Cuz they are JUNK!!!!
Should’ve watched this before I bought my crappy commercial “mod” muffler
И что бы это дало?
No helmet, no chaps = no safety?
Why would you wear a helmet when not felling? Chaps are a sales gimmick.
Get a life safety troll.