Project 660

[psuiewalsh]

Drill some 3/8 holes in the flat part with no holes or go bigger and connect them? We cut one out will an end mill before but it takes a good bit of cutting.

 

[jmssaws]

Just drill some holes in it.

Don't need much. Open the outlet u good

 

[psuiewalsh]

Thanks. Will do tomorrow.

 

[Adirondackstihl]

View attachment 8909 View attachment 8910 View attachment 8911 Muffler outlet mod. Is it worth the effort to remove the baffle on a non ported saw or just open up internally?

I usually just zip the front cover off of it

 

[Brewz]

Open the baffle up but leave it for strength.

I put a 16mm hole in the front of my baffle which was close to completely removing the front.
The issue I found was that it channeled all the gas to the front part of the muffler where it than had to change direction suddenly.
I drilled, ground, swore, wrestled, hit, bent, swore more, begged, ground, levered, walked away, came back, ground, bent, pulled and FINALLY, the mongrel thing came out.

RIP my poor little carbide bur

The saw runs HEAPS better without it. No louder than with the front of the baffle removed, but just revs more freely and I got a few hundred more RPM at WOT when it starts to 4 stroke.

WARNING:
If you dont have the serious tools, lots of patience and funds for a new muffler when you get half way there and go..... "what the hell have I started", just cut the front off.
They are stuck in there GOOD!

 

[VinceGU05]

I put a 16mm hole in the front of my baffle which was close to completely removing the front.
The issue I found was that it channeled all the gas to the front part of the muffler where it than had to change direction suddenly.
I drilled, ground, swore, wrestled, hit, bent, swore more, begged, ground, levered, walked away, came back, ground, bent, pulled and FINALLY, the mongrel thing came out.

RIP my poor little carbide bur

The saw runs HEAPS better without it. No louder than with the front of the baffle removed, but just revs more freely and I got a few hundred more RPM at WOT when it starts to 4 stroke.

WARNING:
If you dont have the serious tools, lots of patience and funds for a new muffler when you get half way there and go..... "what the hell have I started", just cut the front off.
They are stuck in there GOOD!

drill the spot welds out with a shallow angled drill.

 

[Brewz]

I did that on the bottom part but its the top edge that you cant access with a drill, and it turned out they were spot welded more like a long seam spot weld.

Turned into a nighmare

 

[Deets066]

I grind the welds with a burr, I can have a baffle out in about ten minutes. I do it to every saw

 

[Brewz]

I think I needed a bigger burr!

Like I said..... if you dont have the right gear, its no fun

 

[jmssaws]

 

[jmssaws]

I ported this old girl 3 years ago and she showed back up today. It's been in the log woods since. It left me at 210lbs of compression and come back 120 lol

He's said it didn't idle good but has still bn running it everyday.

There is no single peice of equipment that could take what these will,I'm sure the intake skirt is worn plumb off.

 

[psuiewalsh]

Made holes bigger.

Sent from my C771 using Tapatalk 2

 

[stihl_head1982]

I ported this old girl 3 years ago and she showed back up today. It's been in the log woods since. It left me at 210lbs of compression and come back 120 lol

He's said it didn't idle good but has still bn running it everyday.

There is no single peice of equipment that could take what these will,I'm sure the intake skirt is worn plumb off.

pics? We need pics

 

[jmssaws]

pics? We need pics

I haven't torn it down yet but I bet the intake skirt is cracked in the bottom ring land.

 

[Redfin]

You going to take the other two pieces out of there Keith?

 

[psuiewalsh]

Thought it might be stronger this way? Will they vibe out?

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[Deets066]

Made holes bigger.View attachment 9067

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I'd take the rest of the baffle flange out on top, just gives me an uneasy feeling knowing they are there. The ones by the ex. port are fine, the bolts hold those in and give the muffler a little more "meat" where it's mounted

 

[Redfin]

The spot welds on those sides are pretty small. Id take them out.

Edit. On the top is what I mean.

 

[psuiewalsh]

Ok the ones without the holes, correct

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[Deets066]

The spot welds on those sides are pretty small. Id take them out.

Edit. On the top is what I mean.

Agreed