Muffler mod pictures

[Mag Craft]

I'm finding these super difficult to get a nice bead on. My welds come out quite poorly on them.

I'm not sure if it is embedded impurities in the base metal or not. I can get them to seal, but they just don't come out like my other beads.

I always sand blast my mufflers clean before welding on them. It does help a lot.

 

[Mag Craft]

Hands down the double barrel guys win!

Here is another double barrel on a Jonsered 670.



This one is on a Craftsman 3.8 or same as a Poulan 3800.

 

[Mag Craft]

If anyone is wondering on that Craftsman 3.8 you do not see any weld where it attaches to the muffler it is because I took a burr and shaped the muffler for the pipe to slide in to the muffler and then welded it from the inside. Just makes it look cleaner.

 

[mt.stalker]

Here's one I'm developing

 

[Homelite410]

No tig here, I will stick with my silver braze.

2260

 

[MG2186]

No tig here, I will stick with my silver braze.

2260

That silver solder is sum dam nice stuff! Just wish it wasn't so dang expensive!


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[Mag Craft]

Nice clean finish.

 

[mdavlee]

That silver solder is sum dam nice stuff! Just wish it wasn't so dang expensive!


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No kidding. I can get my argon bottle refilled for the same price as the silver solder.

 

[VinceGU05]

Thats why I took the time to learn to weld properly.
For a leco, I can stick mig tig and oxy weld, brais, silver solder, use plasma, oxy cut etc.

Handy skils

Exploding welds will be impurities in the metal for sure

Pulse is a must on thin stuff.

Exploding welds can be moisture too. Best is to bead blast and throw a little pre heating at it. That may settle it down. Normally it's the cheap Chinese steel that explodes the best. [emoji12]

 

[MG2186]

I'm working over my 2159 and its baffled up pos. I bought a HyWay one and it's got a partition in the middle with one whole in it. What have you guys done to open these mufflers up


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[Mag Craft]

I'm working over my 2159 and its baffled up pos. I bought a HyWay one and it's got a partition in the middle with one whole in it. What have you guys done to open these mufflers up

I try and remove as much as I can or at least half of the baffle. I always try to keep a way to put a spark arrestor in the muffler because I cut on national forest a lot during the summer.

 

[mdavlee]

Couple I did today.

 

[Moparmyway]

This 066 muffler is ready to have Reds deflector welded. I'll put screening under it before I weld it

 

[Moparmyway]

I love these deflectors from Red97 !

 

[Deets066]

 

[drf256]

I love these deflectors from Red97 !View attachment 8623View attachment 8624View attachment 8625

I love them too.

I'd like a size in between what he currently offers.

@Red97

Hint, hint.....

 

[Brewz]

Is this a good place to ask where opening up a muffler becomes counter productive?

I see some really big holes above and I have read that a motor needs some back pressure.

I know when I put a big open exhaust on my V8 ute, it had great top end power but lacked low down torque. I had a smaller section put on at the last meter and it moved the torque down the rev range.
But....... Chainsaws work at full revs, like a race car.

Whats the theory and the limits?

 

[Deets066]

Depends on the saw, the 066 loves to breath

 

[mdavlee]

I've been taking a punch and tappingdown the flat on each side to hold screen down. Seems to work so far. That way you don't have to cut them off to get screen out.

 

[Moparmyway]

I've been taking a punch and tappingdown the flat on each side to hold screen down. Seems to work so far. That way you don't have to cut them off to get screen out.

I thought about that, but figured the thicker screen to be basically bulletproof.
Its an experiment for now ..........