Part Six: The Exhaust System

[davidwyby]

Here’s a question.
What would you suggest for making the loudest, most obnoxious sound as possible?
Why?
Spook house prop saw, Stihl 170s, used outdoors
No chains are used, at least the spinny kind

No muffler

 

[Woodwackr]

No muffler

Nah, won't be obnoxious enough.

 

[davidwyby]

I was out behind my shed with my 395 idling with no muffler and my son’s friends could hear it thru his gaming mic in the house. Bout made my ears bleed.

 

[Woodwackr]

I was out behind my shed with my 395 idling with no muffler and my son’s friends could hear it thru his gaming mic in the house. Bout made my ears bleed.

These are 170s..slight difference

 

[davidwyby]

Megaphone welded to a flange…

 

[Woodwackr]

Megaphone welded to a flange…

Now yer talkin’
So, how to make?

 

[Stem]

Now yer talkin’
So, how to make?

mix one part Mega, one part Phone. bake in the oven at 350 for abt 35 mins. season to taste.

 

[Woodwackr]

mix one part Maga, one part Phone. bake in the oven at 350 for abt 35 mins. season to taste.

Flip phone? Smart phone? Rotary phone?
And, fixed above

 

[qurotro]

Nah, won't be obnoxious enough.

Large engine saws with no muffler or little tin can muffler like the vintage Mcculloch are obnoxious.

 

[thedude74]

Here’s a question.
What would you suggest for making the loudest, most obnoxious sound as possible?

My mother in law.

 

[Woodwackr]

So...played with what was a trashed 170 muffler.
Think this will be loud enough?

 

[thedude74]

So...played with what was a trashed 170 muffler.
Think this will be loud enough?View attachment 419329View attachment 419332View attachment 419333

From the exit can see quite a bit of exhaust port. Should have lots of Decibels....The Woodwackr almost straight Shot muffler !

 

[Ketchup]

I recently came across a few ported saws with exhaust ports that weren’t widened, but were raised a little higher than normal. The saws run very well. What do you fellas think of this approach? I have always opted for wide before high, but I’m starting to think some of my ports are too wide.

 

[Mastermind]

I recently came across a few ported saws with exhaust ports that weren’t widened, but were raised a little higher than normal. The saws run very well. What do you fellas think of this approach? I have always opted for wide before high, but I’m starting to think some of my ports are too wide.

I am very conservative on port width, both on the intake and the exhaust. After hanging a couple of rings in the exhaust, and seeing how a wide intake accelerates skirt wear, I started dialing back.

 

[Ketchup]

Agreed. I also suspect the wide exhaust is affecting the scavenge loop.