Hulzfforma G366, Stihl MS361 muffler mod 30% Boost performance, re-engineereing muffler
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- Опубліковано 15 лис 2022
- Muffler Mod to Hulzfforma G366, Stihl MS361 clone. Upgraded after 3 years in service. , DIY video starts with a current performance demo, then muffler removal, splitting the muffler, completely gutting all of the interruptions to exhaust flow. This includes the diffuser, the reverse inlet, the transition outlet to the rear, and the final forward deflector. Then reassembly with welding, painting, and installation. This process of splitting the muffler allows us to do much more than provide a larger outlet pipe. It stops the exhaust from being redirected 3 times inside the muffler, and significantly reduces internal muffler heat thereby reducing external heat on the jug and piston. Then we also remove the rear exhaust deflector, additionally reducing heat to the engine. Reducing all of this external heat from the muffler to the engine allows the cylinder and piston to run cooler. A cooler engine and piston means cooler inter temperatures allowing for a denser air fuel mixture to produce more power. That is why the performance increased so significantly. We did not just slap another port on to the muffler. Now without a dyno we can not know exactly what the real gain is, but even if our evaluation is in error by 13% then we still had a 20% gain in performance. Thanks for watching and have a great day
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I have the ns872 a clone of the ms382 and I'm considering eventually doing that too. Luckly my muffler is bolted/screwed together, so opening it up and putting it back together will be much easier. My one issue is I have no way to weld the exhaust pipe onto it. So I may have to hire that done.
But I love the increase in power you got. Thank you for showing us the difference without any extra mods.
Great video. 😎👍
Thanks for your comment. Glad you found it helpful. Hope you enjoy that saw. All the reviews. I read about It looked pretty good, and it’s a nice size saw for sure.
Great job on the muffler! That saw has got some power! I have an old Sthil ms361 that I need to do the same thing!🤩🤩
Thanks, glad you enjoyed the mod. Hope you enjoy yours.
Great video. Thanks for sharing.
Thanks for watching!
Thank you!
A lot of us small budget residential users have gone to gathering our own firewood to cut down on heating cost without wiping out the budget.
For many of us this means getting free trees from Blow downs/dead falls or Clean up wood removal from tree fallers. i.e. we need bigger, more powerful saws(on a budget)
Enter the Chinese Copies with decent power and somewhat acceptable performance, but not like the oem saws.
I've noticed the 373 copies are very popular. They seem to be fairly reliable, easy enough to work on and if not pushed they can handle 24"-28" Bar/Chain combos. Problem is, as soon as you lean on them they tend to stall the chain in the wood.
It looks like a Muffler upgrade would be the first and least expensive way to greatly improve performance.
Your Modification to the G366 seems to confirm this.
Again - Thank You!
Your welcome, and thank you for your excellent explanation of why so many of us opt for these clone saws now days, and we want to get what we can out of them. Especially low budget, low risk improvements that we can do with the tools we have. Thanks again and have a good firewood harvest this year.
Mantap bro 👍
Thank you
New subscriber here from France...very informative video, out of interest how much louder was it after the exhaust modification ?
Thank you for subscribing and the question.
I do not have a meter to measure them proper. My best guess is that there is about a 20 to 40% increase. If I am not wearing hearing protection I don't notice the volume change much but the tone is deeper and I can actually feel a small pressure on my ears after modifying the muffler. I always use hearing protection now.
Nice... I think I'm going to get the kit and put on the big bore cylinder.... How is the antivibe?
It’s better than 029/039. I saw you have a 291. The AV system is not identical bet very similar to the 391. So I hope that will provide you with a good reference point. Thanks for your comments.