361 Shootout

[timberwolf]

Have 2 361s and a 361BB on hand so thinking of comparing muffler mods along this line and also the BB vs factory cylinder and piston.

Hope to get some dyno and flow bench numbers as well.

 

[wiskey_6]

This should be good to sit back an watch.

 

[RTK]

cool

 

[timberwolf]

One thing with the 361 filter is the whole exhaust gets pushed through one small hole in the funnel shaped piece of junk that was pulled out. Very restrictive and a lot of changes in direction and shape of flow.

 

[Trigger-Time]

Thanks TW, Am very glad to here this

I am on my 2nd 361 and it's just now getting broken in.
I saved my 361 MM muffler from 1st 361 and was planing
on doing some testing my self to see if my MM really made
any difference or an I just making more noise.
I have the new muffler to switch out with this one.

But from things you have said I need to remove the muffler guts. correct?

TT

 

[timberwolf]

Your muffler mod will be getting past some of the restriction but the flow will still need to pass through the basket at the inlet of the muffler so there is some potential restriction.

 

[Trigger-Time]

Your muffler mod will be getting past some of the restriction but the flow will still need to pass through the basket at the inlet of the muffler so there is some potential restriction.

I was surprised that very little exhaust now comes out of the org port.

Also I guess it's on my end but your pic show up as X
TT

 

[timberwolf]

Not sure why the pics are not comming up for you, they are linked from here on post #60.

http://arboristsite.com/showthread.php?t=154490&page=4

If you look at that junk in the muffler It is pretty clear why the flow would rather go out the side than around through the inner passages.

 

[2000ssm6]

All the MM I've done on 361s turn them into another saw. Those have got to be in the top 5 of "most choked up saws". I bet they gain a bit more w/o the internals.

 

[mtngun]

I love it when you post a project TW. Love your hard data and your logical approach.

 

[Tzed250]

Now this will be a good thread...

 

[SawTroll]

Your muffler mod will be getting past some of the restriction but the flow will still need to pass through the basket at the inlet of the muffler so there is some potential restriction.

I remember that Andy used to say that the basket had enough (and large enough) holes to not matter, but I always was a bit sceptical about that.

It is a pity that you probably can't include a stock Euro 361 into your test, but I look forward to the results anyway!

 

[blsnelling]

Andy frowned on about anything that wasn't stock or OEM.

 

[madhatte]

I also always wondered about the assertion that those holes were "enough". The angles don't look right to me. I am looking forward to the results of this test.

 

[SawTroll]

Andy frowned on about anything that wasn't stock or OEM.

Hmmm - why did he mod 361 mufflers then, and be very public about it?

He also used to talk about modding the muffler of the "strangled" US 260s, to compensate for the power loss.

 

[parrisw]

OOO, a TW thread!! cool. Here is the pics. See if I can help here.

Question for ya TW, are you tig welding your mufflers? Last time I did a muffler was the first time with my new tig, and I had a hell of a time cause the filler was too thick, couldn't find any thinner. So I haven't tried it yet but was going to try to use some mig wire as filler since its sooo much smaller. What do you use?

 

[Gypo Logger]

OOO, a TW thread!! cool. Here is the pics. See if I can help here.

Question for ya TW, are you tig welding your mufflers? Last time I did a muffler was the first time with my new tig, and I had a hell of a time cause the filler was too thick, couldn't find any thinner. So I haven't tried it yet but was going to try to use some mig wire as filler since its sooo much smaller. What do you use?

No pics yet that I can see. TW great work, but couldn't you have had the common decency to have showcased a Husky! Lol
John

 

[parrisw]

No pics yet that I can see. TW great work, but couldn't you have had the common decentcy to have showcased a Husky! Lol
John

Working for me John. Not sure what's up.

 

[Gypo Logger]

Working for me John. Not sure what's up.

Maybe Mntgun can come to the rescue, he's good with this sort of thing, but I can't rule out my computer, although other pics are showing fine.
John

 

[parrisw]

Maybe Mntgun can come to the rescue, he's good with this sort of thing, but I can't rule out my computer, although other pics are showing fine.
John

Hmm,

anybody else having problems seeing the pics?