Here is my 372xp bb muffler mod. Still in the rough stage but I cleaned it up and painted it. Seems to have done the trick. Now I have to port it and advance the timing. And you can tell what saw I'm thinking of getting in the near future.
Lakeside53's --361 muffler mod w/photos
- Thread starter bri
- Start date
Help Support Arborist Forum:
Here is my 372xp bb muffler mod. Still in the rough stage but I cleaned it up and painted it. Seems to have done the trick. Now I have to port it and advance the timing. And you can tell what saw I'm thinking of getting in the near future.
injun joe
ArboristSite Operative
ok was hopin you guys could post yur pics of a stihl 441 modded? im not really looking for a power increase i just want my saw to sound like its got a pair. sadly to say my ms 390 sounds like it would eat the 441.
tramp bushler
Addicted to ArboristSite
- Joined
- Feb 3, 2007
- Messages
- 3,376
- Reaction score
- 633
The 441 does sound like a wus , and it weighs 2 lbs more than an 044 , which is a way better saw , execpt in the vibration department ....... I tire of an overly loud saw . I used to take the whole front off the muffler on a few saws ..
025
Is it correct of me to say that I should not mod the muffler on my 025 if it only has the L adjustment on the carb?
Is it correct of me to say that I should not mod the muffler on my 025 if it only has the L adjustment on the carb?
isaaccarlson
Addicted to ArboristSite
Wow!!!!! Power, power, power!!!!!!
Just ported my 390 muffler and HOLY COW!!! That thing MUST be pushing 6-6.5 HP!!! It won't stall in elm with 20" bar and full chisel chain with depth guages a little deeper than stock.
and thats when I HANG on it!!!:jawdrop: It's just raw power......had to run the port off to the right, above the stock port because of the saw design. THANK YOU LAKESIDE!!!!!! I am going to do this to all my friends saws too....:greenchainsaw::greenchainsaw:
Just ported my 390 muffler and HOLY COW!!! That thing MUST be pushing 6-6.5 HP!!! It won't stall in elm with 20" bar and full chisel chain with depth guages a little deeper than stock.
and thats when I HANG on it!!!:jawdrop: It's just raw power......had to run the port off to the right, above the stock port because of the saw design. THANK YOU LAKESIDE!!!!!! I am going to do this to all my friends saws too....:greenchainsaw::greenchainsaw:
StihlyinEly
Addicted to ArboristSite
Four Paws said:
Does anyone know whether these are available for the MS290 and 028AV saws? And am I reading it right that if these are installed a muffler mod probably is not needed?
Only available for the 044/046 and 660 as far as I know I do know they don't have them for the 028/029 your on your own for these but they mod pretty easy
StihlyinEly
Addicted to ArboristSite
Thanks ironman.
isaaccarlson
Addicted to ArboristSite
Here are some pics of my 390 muffler mod
its not on all the way because there is still metal dust in it.
View attachment 112898
View attachment 112899
Now for the black stove paint.....
its not on all the way because there is still metal dust in it.
View attachment 112898
View attachment 112899
Now for the black stove paint.....
isaaccarlson
Addicted to ArboristSite
Here it (390) is....with 1500 degree exhaust paint
Cooked it in the grill on high for almost an hour and a half.
View attachment 113102
View attachment 113103
View attachment 113105:greenchainsaw:
Cooked it in the grill on high for almost an hour and a half.
View attachment 113102
View attachment 113103
View attachment 113105:greenchainsaw:
injun joe
ArboristSite Operative
looks good. i know when i opened mine up there was no comparison. my uncle had a 390 and we went out cutting his non modded 390 couldnt keep up.
just out of curiousity does yur 390 sound like its got a pair? i know mine does almost like it better than the rest of my saws.Howdy, chainsaw newb here. Does anybody have any details on muffler modding an echo cs400? I searched and seen a few people have done this but I didn't see any pics or details. I have no problem cutting it apart, but it would be nice to hear of a proven mod, since its a $50 muffler. Thanks.
SXSMAN
ArboristSite Lurker
Day late/dollar short
Wish I'd known about this forum some time ago . I did try to buy a book off of ebay " How to modify your chainsaw muffler " but never received the book only to file a dispute to get my money back .
I've also seen and known of " Walkerized " saws for some time but had the pleasure of meeting Don Walker this last summer when I was on Vancouver Island and also his lil dog Tim ( Timber , 150 lbs Siberian Husky , part dog-part pony- I swear ! ). Not to slight Don but I may have made mods to my saw first before sending it to him . As a Euro auto mechanic for over 25+ years we have a very nice machine shop to even make a muffler from scratch . Might have been fun to work on the 394 but there will be other saws ......
Should have my 394XP back from Don in a couple of weeks .
Some repairs and mostly mods were done .
I plan on replacing the 350 with an XP , but may play with some mods on the muffler first thanks to this forum and thread .
Just wanted to say hey and thanks for a good source of info .
SxS
Wish I'd known about this forum some time ago . I did try to buy a book off of ebay " How to modify your chainsaw muffler " but never received the book only to file a dispute to get my money back .
I've also seen and known of " Walkerized " saws for some time but had the pleasure of meeting Don Walker this last summer when I was on Vancouver Island and also his lil dog Tim ( Timber , 150 lbs Siberian Husky , part dog-part pony- I swear ! ). Not to slight Don but I may have made mods to my saw first before sending it to him . As a Euro auto mechanic for over 25+ years we have a very nice machine shop to even make a muffler from scratch . Might have been fun to work on the 394 but there will be other saws ......
Should have my 394XP back from Don in a couple of weeks .
Some repairs and mostly mods were done .
I plan on replacing the 350 with an XP , but may play with some mods on the muffler first thanks to this forum and thread .
Just wanted to say hey and thanks for a good source of info .
SxS
Ilie
ArboristSite Lurker
more power needed here in Romania also 
this thread caught my attention on the first read. This is also my first post here, so cheers to every enthusiast on here. glad I've found this comunity.
I've opened the exhausts on my dirt bike, on my cars and I said why not on the chainsaws. So, my first one that got the muffler mod was the Husqvarna 575XP. I know that there weren't so many modded mufflers on these, but I tried and did it. It performs better than before but also MUCH louder, it screams like a 2 stroke MX. though, I'm looking forward to see if I can get fix it with a black ignition module from 372, cause I couldn't get just 13600rpm. otherwise, I love it!!
I was basically ported the actual 4 inside openings of the firewall that its inside of the muffler, sorry no picture for that. and then added on the lower side of the muffler 2 pipes, and had them angled cutted inside and outside and also got it painted with a thermal paint.
then I went further with the next chainsaw that I have, its called Partner 352 (same as Poulan 2250 and other), its a small cc chainsaw that I used in my garden from time to time.
we did porting for the first time on this one. have to say that we didn't do NOTHING on the timing because we have to figure out first how to do it. we've opened the intake and the exhaust side quit a few milimeters. then I did the muffler job, which looks great. It performs way better, and it revs quicker. I just did some carb adjustments cause on first start it stayed higher on rpm, and didn't do it good on high rpms. It still didnt went upper than 13400rpm. I need to get more into this one for sure, but for now it outperforms ANY of his twin brothers
also, any suggestions are welcomed.
this thread caught my attention on the first read. This is also my first post here, so cheers to every enthusiast on here. glad I've found this comunity.
I've opened the exhausts on my dirt bike, on my cars and I said why not on the chainsaws. So, my first one that got the muffler mod was the Husqvarna 575XP. I know that there weren't so many modded mufflers on these, but I tried and did it. It performs better than before but also MUCH louder, it screams like a 2 stroke MX. though, I'm looking forward to see if I can get fix it with a black ignition module from 372, cause I couldn't get just 13600rpm. otherwise, I love it!!
I was basically ported the actual 4 inside openings of the firewall that its inside of the muffler, sorry no picture for that. and then added on the lower side of the muffler 2 pipes, and had them angled cutted inside and outside and also got it painted with a thermal paint.
then I went further with the next chainsaw that I have, its called Partner 352 (same as Poulan 2250 and other), its a small cc chainsaw that I used in my garden from time to time.
we did porting for the first time on this one. have to say that we didn't do NOTHING on the timing because we have to figure out first how to do it. we've opened the intake and the exhaust side quit a few milimeters. then I did the muffler job, which looks great. It performs way better, and it revs quicker. I just did some carb adjustments cause on first start it stayed higher on rpm, and didn't do it good on high rpms. It still didnt went upper than 13400rpm. I need to get more into this one for sure, but for now it outperforms ANY of his twin brothers
also, any suggestions are welcomed.
Last edited:
029 muff mod
Just did a muffler mod to my 029 this afternoon, can take a few pics and put them up for you if you think it would help. It was fairly simple, and didn't take too long (no welding involved). It is definitely more peppy.
Just did a muffler mod to my 029 this afternoon, can take a few pics and put them up for you if you think it would help. It was fairly simple, and didn't take too long (no welding involved). It is definitely more peppy.
Muffler mods look sweet! Nice welding job.
voxac30dude
ArboristSite Operative
my homelite saw has a cover on the muffler. it's a separate piece of flat steel thats cover the actual muffler. do i need to keep it on? will it make my saw run better if i take it off?
Ilie
ArboristSite Lurker
thanks.
I wanted to do a TIG weld, but didn't had one. still went good after all.
thanks.
What model homie? Add a pic or two.
voxac30dude
ArboristSite Operative
it's a 33cc ranger. model nuber is UTC10532 it has a 16 inch bar. i belive it's a 2006 model.
