Lakeside53's --361 muffler mod w/photos

[Rspike]

Youz gots some BIG dogs there brother.
Just scare the tree down and then you dont have to cut it.

Are the dogs from Baileys ?

 

[Engineeringnerd]

Let's start a new thread

Rspike,

I'll start a new thread called "Monster 372xp Dawgs" so we don't hose up Four Paw's muffler mod string.

 

[ASEMASTER]

jhonny 670

gentlemen just did a shotgun mod. to the 670. i used 1/2" conduit cleaned off the gal. and brazed it and old exit shut with MA PP GAS never tired it before but read a post where they used it .not as fast as oxy.acet. but did a good job especially on such thin metal. have not tried in the wood as of yet but it sounds real nice.

 

[CUCV]

Finished up my first go around a couple muffler mods this weekend.

The first is a 372 project saw, I got the cylinder off a crushed saw on ebay. Total muffler port area is 85% of exhaust port. Used a 350 screen for the second port.

The second is 044/046 project saw. The muffler port area is 85% of the exhuast port with a screen inside. The crank bearings are locked, but I have a 046 ported cylinder to go on it when I get a new crank and bearings.

The third is a 288. The muffler port area is 87% of the exhuast port with a screen inside. Made a few cuts today but my tach batterys are dead so I didn't run it much. Wasn't as loud as I expected. Dean ported the cylinder and I plan to advance the timing when I get a chance.

 

[tek9tim]

How well does the chainbrake work on that 044?

 

[CUCV]

How well does the chainbrake work on that 044?

1/8" of clearance when in the brake position and I am leaning on the handle.

 

[dewclaw]

Has anyone done the numbers on a muff mod for a stock 268XP ?
What size I.D. pipe shoud I need , I think I will do the 2 hole mod. For that matter , what size I.D. pipe for a single hole mod in case I go that route?

I want to be on the conservative side if anything , I dont want to over do it.

Thanks ahead of time for the replies.

Dew

 

[timberwolf]

Two pieces of 3/4 inch tube with about a 5/8 inside diamiter would be good, or one single with an inside about 13/16 would be good.

 

[Canyon Angler]

Lakeside,
Just to clarify in my mind -- to modify the muffler with the extra port and screen like you did in this thread, is there any need to actually heat and uncrimp the muffler? Or can you just drill and file a hole, braze on a piece of tubing, and clamp a piece of screen in there? Thanks,
Jeff

 

[Lakeside53]

Nope - read post #28!!!!! That is the "leave the crimp alone" method. And... the screen issue is also covered.

 

[windthrown]

Welder muffler?

Good timing! I'm modding my 034 muffler this weekend. My first challenge is that the previous owner welded the front cover onto the muffler - it makes getting at the internal screws a challenge!

Welded? Did you get the saw from a EPA employee or something? :hmm3grin2orange:

I think that will be coming next. A tamper-proof EPA certified exhaust system for all future chainsaws! *sigh*

 

[Canyon Angler]

Thank you Lakeside! I gotta try that!

 

[Canyon Angler]

One more question, Lakeside: What kind of brazing rod and flux did you use? I saw you mentioned flux but the brazing rods I recall seeing were just solid brass or bronze with no coating...also, do you know whether an acetylene torch like you would use for soldering copper pipe would be hot enough? Thanks again!

 

[Lakeside53]

I was using flux coated bronze rods - nothing special. The flux had probably melted of the rods if they are in the pictures. Just use any bronzing flux -heat the end of the rod, dip it in the flux powder and you are ready to go.

Oxy-is acetylene (very low settting or you'll punch though the sheet steel) is what I use, but mapp gas is fine or in a squeeze, even propane works.

 

[Canyon Angler]

Thank you sir!

 

[Lakeside53]

post a pic when it's done!

 

[parrisw]

Can anyone advise me on how to retune after a muffler is modded, I ve setup carbs before, only on stock saws though. I usually hear people just say a little richer. Kinda hard to go by that. I want to do my Husky 394xp.

 

[SWE#Kipp]

Another 372 muffler mod ,,,,

 

[Urbicide]

Another 372 muffler mod ,,,,

Very nice job. Looks almost stock.

 

[ispansco]

Excellent work SWE#Kipp, the welds seem done by husqvarna
I put here also photos of my modification.
Greetings