Muffler Modd And Screen Question

[KenJax Tree]

Thanks. I was trying to think of that site and couldn't remember what it was leave it to a old vetern to come through again.

 

[ndlawrence]

Thanks. I was trying to think of that site and couldn't remember what it was leave it to a old vetern to come through again.

Post back if ya got any more questions

 

[Johny Utah]

I just take the muffler off and use the screw holes where the muffler bolts to to secure a screen over the exhaust port.

Oh no here we go. I hope the OP has a good sense of humor:bang::hmm3grin2orange:

 

[Johny Utah]

At least make it big enough and no screen:hmm3grin2orange:

I could fit a potatoe in that hole:hmm3grin2orange:

 

[Johny Utah]

I made the hole in my husky 350 as big as possible under the screen footprint. This worked out to about the size of the exhaust port. I need to keep the screen as I cut on federal lands and a spark arrestor is required. This saw only has a factory exhaust hole the size of a pencil so the difference is huge. Deflector had to be cut of to access the area under the screen to cut the exhaust port sized hole in the muffler top. Then the deflector opening was not big enough so i tig welded up a new deflector with and opening the size of the port. My buddys call it the big mouth saw. It screams now with a cool sounding exhaust note. No fancy math here, just figured out the square area and used it as a guideline. Much faster in hard pinion pine stumps of about 20". The saw spools up almost violent, its amazing, I do not think you will be far off from optimum with your plan as it worked well for me. :msp_thumbup:

Pics or it didn't happen.:hmm3grin2orange::hmm3grin2orange:

 

[KenJax Tree]

Thats what she said!

 

[woodyman]

I could fit a potatoe in that hole:hmm3grin2orange:

What could you fit in this hole.Ported 371xp.

 

[ft. churchill]

Here is some photos of my lastest muff mod. this is for the pair of husky 61's im building up. One is to be stock early 61, the other that I finished today is a 61/272 top end. Old bicycle handlebars that found out dumped in the desert is what I used for the pipe. Did the flare on the pipe with a ball peen hammer just 'cus I thought it would look cool. Wish I could describe more what it sounds like, but my carb is not getting fuel so I only had it running intermittently. Looks like I have a carb rebuild in my near futureView attachment 228824View attachment 228825View attachment 228826View attachment 228827

 

[farrell]

this is what i did on my husky 372

 

[Johny Utah]

What could you fit in this hole.Ported 371xp.

That's awesome. That thing must act like a boom tube on a car exhaust. Is it loud as hell?

 

[splitpost]

What could you fit in this hole.Ported 371xp.

any vids of this thing

 

[deye223]

hey i could be wrong but i think you will be losing power because the hole is to big , noise don't necessarily mean more grunt :msp_unsure:

 

[SierraNevada]

I'm going to need to have a look at that... in private.

 

[bobt]

On chainsaws, I always think that a little backpressure is a good thing.

But then I remember back in the early 1970's snowmobiles, the really hot ones cam from the factory with 1& 1/2 in flex tubes for each cylinder and no mufflers. The exhaust ports had much less area than those straight pipes, and those engines revved out with lots of power, and yes,,,,lots of noise! Those flex tubes were just routed out the frame of the snowmobile in front of the track. Didn't seem to affect the life of the motor.

 

[Stihlman441]

I just want screens so stuff dont blow up in the cylinder when Im trucking down the road.

When i finish cutting for the day i pull starter rope untill piston is at top dead centre,no moisture,dust,spiders and what ever can get into the cylinder.:msp_smile:

 

[XPLRN]

View attachment 227166View attachment 227168View attachment 227170View attachment 227172

Nice to get a visual assessment on what you'd mentioned in a 350 thread I have going!!! :msp_thumbup::msp_thumbup: