880 saw modifidations

[fellowfeller]

Hey guys, I cant thank you enough for all the good info you've given me since I've joined. I have a question I cant seem to find an answer to. I've got a new 880 that Im looking to squeeze a little more power out of. I'm not so happy with it when compared to my 660 With a DP muff. Why is there not a DP muffler for the 880. Or is there and I just cant find it. I'm debating on making my own, and until the warranty runs out, I want to stick to a simple mod such as a muffler. I plan on milling with the saw when winter breaks and I can get back in the woods for the Hemlocks. If I make my own Muffler I can direct the outlet down away from me how I wish, but I'd rather buy one. Any ideas??

 

[Stihlman441]

Which model 880 do ya have cast muff or stainless muff ?.

 

[fellowfeller]

Its a 2 piece muffler I'm assuming it the stainless one. The saw is about 3 months old. I didn't even take it off yet to inspect it. I heard there is machining involved, which doesn't scare me as I'm a machinist.

 

[Stihlman441]

Have a look in here.

http://www.arboristsite.com/chainsaw/187249.htm

http://www.arboristsite.com/chainsaw/188253.htm

 

[BobL]

DPing on a milling saw results in the exhaust bouncing off the log and up into the operators face so its better to just "roll your own" if you can.

You might want to have a look at what did with my 880 muffler mod.

 

[fellowfeller]

WOW, that a sweet job!! I had something like that in mind. I took the muffler to work tonight and hollowed it out real nice. Being stainless, tomorrow I'm going to TIG in a stainless tube about 1 inch ID. Where it would be ideal for a cross cut application. Out and to the side. And in the end of this tube I'm going to put a fine thread in where I can screw in a secondary tube to direct the exhaust away while milling. I'll have to index the threads properly to tighten with the tube pointing properly in a ideal direction. I'm getting quite excited about how gnarly this saw is going to sound. thanks everyone for the ideas!! Hope it works.

 

[splitpost]

be real interested in some pics and a vid of the finnish product

 

[fellowfeller]

Soooooooo....... I made the muffler, it came out awesome, tuning on the other hand is a little more tricky than I expected. Only because the darn rev limiter. Should I Get the saw to 4 stroke before it hits the limiter?? I have a tach and what not. I'm kinda assuming to tune it to the specified max no load RPM and call it a day. Its usually a breeze but I don't want to run her lean as you guys I'm sure know, you cant just go out and get an aftermarket P&C for an 880.

 

[splitpost]

did you get some pics man

 

[fellowfeller]

Yeah, sorry about the picts! my mill is in Maine 6.5 hrs away. I'll post some of just the saw alone.

 

[splitpost]

Yeah, sorry about the picts! my mill is in Maine 6.5 hrs away. I'll post some of just the saw alone.

cool,want to see what sort of muff you ended up with

 

[BobL]

Soooooooo....... I made the muffler, it came out awesome, tuning on the other hand is a little more tricky than I expected. Only because the darn rev limiter. Should I Get the saw to 4 stroke before it hits the limiter?? I have a tach and what not. I'm kinda assuming to tune it to the specified max no load RPM and call it a day. Its usually a breeze but I don't want to run her lean as you guys I'm sure know, you cant just go out and get an aftermarket P&C for an 880.

Yeah tuning is a bit of a pig..
Setting the H screw so that it sits on max rpm is potentially dangerous since the max rpm might just be the limiter in action and you might inadvertently be running it lean
I tune mine to max RPM (ie limiting in action) and then back it off a few hundred RPM (~ 11.5K) so I know I have control and am not bouncing off the limiter..

 

[splitpost]

any pics?