The coolest muffler mod ever!!

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FlyLow

FlyLow

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In the woods
Im finished with the muffler.


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Now its ready to go ECSAWS:rock::rock::rock::rock::rock:
Hopefully he can do a before and after video since I didn't get one done
 
grommet

grommet

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That looks awesome. How much area does the mod open up the muffler? I would like to do something similar, but I'm concerned about the muffler having enough backpressure.
 
FlyLow

FlyLow

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Messages
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In the woods
That looks awesome. How much area does the mod open up the muffler? I would like to do something similar, but I'm concerned about the muffler having enough backpressure.

Total area is .331 square inches. I didn't measure the port area so I don't know the percentage of opening. The length of the pipes adds a little restriction so ideal might not be typical percentage. I ran it a little before I sent it to Copsey and it ran great.
 

Isna

Logging and sharing it (teaching)
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French Alps
Awesome!!!!
Got me thinking... My 440/460BB MM needs one of those...
I like the idea of having tubes coming out both sides: Tribute to the good old dual exhaust 2 men chainsaws (such as my 1945 PPK). Too many projects these days, but I will surely use that idea one day.
 
stihl 440

stihl 440

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Awesome!!!!
Got me thinking... My 440/460BB MM needs one of those...
I like the idea of having tubes coming out both sides: Tribute to the good old dual exhaust 2 men chainsaws (such as my 1945 PPK). Too many projects these days, but I will surely use that idea one day.

Kind of like what i do?..pretty much all my saws are this way....this is my husky 395...View attachment 217967
 

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