Thread: 044 muffler mod

Ok so I have been readin up on cuttin up a muffler for my 044 but i have a question. It has a fairly large exhaust hole in it already(roughly .720"). Seems to me that goin by the 80% rule, that i'm already at full size. My 440 on the other hand has a SMALL exhaust hole in it and maybe that would be the better choice for a mod or dual port. Any thoughts?


THANKS!!!

Originally Posted by JCARMAN

Ok so I have been readin up on cuttin up a muffler for my 044 but i have a question. It has a fairly large exhaust hole in it already(roughly .720"). Seems to me that goin by the 80% rule, that i'm already at full size. My 440 on the other hand has a SMALL exhaust hole in it and maybe that would be the better choice for a mod or dual port. Any thoughts?


THANKS!!!

Not quite sure what yer askin' Brother...Does the 044 with the enlarged muffler port run well? It should, that's exactly what we do with our 044s and 440s...we didn't bother with the dual port muffler route, just enlarged the heck outta the stock port (and kept the spark screen intact). After tuning these saws all RIPPPPPPPPP!!!!!!!!!!!!!!!

Sorry Bounty Hunter
I enjoy readin, writin' not so much!
I guess what i was tryin to say was the 044 muffler had a hole in it already the size it should be. By my math anyway! (math is always up for debate!) Heres what I figured. exhaust port 1.125" X .750"= .84" x .8(80%)=.672" hole, does any of that seem right?! If it is, does the mod need done? or do i just do it to my 440 which i know is choked off!
Is that better?

Originally Posted by JCARMAN

Sorry Bounty Hunter
I enjoy readin, writin' not so much!
I guess what i was tryin to say was the 044 muffler had a hole in it already the size it should be. By my math anyway! (math is always up for debate!) Heres what I figured. exhaust port 1.125" X .750"= .84" x .8(80%)=.672" hole, does any of that seem right?! If it is, does the mod need done? or do i just do it to my 440 which i know is choked off!
Is that better?

Open it up some more. You running with the spark screen in?

I did remove the screen when i had it apart and re-tuned the carb for now. So u think its to small still? oakie doakie! Bigger it is! I would kinda like to build some kick butt lookin one when i have some time. i saw some NEAT ones on here!

I've heard people claim from 80% up to 125%. I don't know which is right, but my 660 runs very VERY well with the stock outlet opened to around 1" and a DP cover. I'd open it up to around 1". I'd to the 440 while I was at it.

Well that sounds like a good plan! whats the worst that could happen! Have to buy a new muffler OR a new saw!
BUMMER!Been thinkin bout a 660! I know the 440 is way to restricted so im sure i will do something with it eventually. Ive been messin with the 044 because i run it everyday and probably have a better feel for it and was purchased with a running log splitter and a top handle Mac for $200.

What if a guy built a mini header tube(exspansion tube)inside the muffler?

If you go to 100% and then run with the screen it seems just right, at least on my 4X 044`s.
The spark screens do cause some restriction, how much is debateable, just depends on their condition and age.They can plug up some if the mix is too strong or the carb set too rich.

I would leave the stock port and put the screen back in and put a second port from a Husky 288.Here's a pic of the one I did.It's simple and cheap and you have a daul port.Pics not to good.

sure, makes sense.
if u take each wire and lay them side by side next to each other, thats the amount of blockage they would have. lot more than a guy would think!

that looks sharp woodyman!

Originally Posted by Anthony_Va.

I've heard people claim from 80% up to 125%. I don't know which is right, but my 660 runs very VERY well with the stock outlet opened to around 1" and a DP cover. I'd open it up to around 1". I'd to the 440 while I was at it.

Yep... I got a stump broke 372 with two ports that are each huge... Ear protection is suggested...

Originally Posted by woodyman

I would leave the stock port and put the screen back in and put a second port from a Husky 288.Here's a pic of the one I did.It's simple and cheap and you have a daul port.Pics not to good.

Now put the front cover with the outlet opened up to max and you will have something!

Originally Posted by woodyman

I would leave the stock port and put the screen back in and put a second port from a Husky 288.Here's a pic of the one I did.It's simple and cheap and you have a daul port.Pics not to good.

I know there was a thread on this somewhere but where do you get those?

Originally Posted by ndlawrence

I know there was a thread on this somewhere but where do you get those?

Your friendly neighbourhood Husqvarna dealer will get them for you.