What did you do to/with your chainsaw today

[joesregalproject]

Out of the few of us that chime in here on a regular basis, any of you guys taken a saw down and done some port work on the cylinder?

I've been watching some YouTube videos and it seems like the Stihl MS461 has some awesome gains when you do some porting and work on the piston..I found another one forsale locally for a good price and I'm half tempted to dive into it for funsies...

Several of my saws are ported, but I don't do the work myself. I send them out to have it done. It requires a very steady hand plus some specialty tools. If you have a basic understanding of fluid dynamics, the how and why will make a lot more sense but if that isn't your thing you can Google where to cut and how much.

My Husqy 359, Dolmar 5105, Husqy 262xp, and my Stihl 066 are all ported. I have a 562xp Husqy sitting here waiting for a port job and eventually my 461 will get some port work as well. Once you run a ported saw you'll never want to run a stock saw again. Here's some cylinder pics from my 066 though.

 

[Built6spdMCSS]

Part of my engineering degree and some of my stuff I do for work is actually fluid dynamics, heat transfer, things of that nature. I definitely understand it, and the first thing I thought of with these being air cooled is how much heat is actually transferred compared to how much actually soaks into the metal for dwell time to be transferred. That is a factor here.

So far from what you posted above is exactly what I have found out, light porting and shaping helps greatly but if you go too much and you get rid of the material too much you actually hurt performance because the saw will overheat.

I'm still looking into it.

 

[Supercharged111]

Part of my engineering degree and some of my stuff I do for work is actually fluid dynamics, heat transfer, things of that nature. I definitely understand it, and the first thing I thought of with these being air cooled is how much heat is actually transferred compared to how much actually soaks into the metal for dwell time to be transferred. That is a factor here.

So far from what you posted above is exactly what I have found out, light porting and shaping helps greatly but if you go too much and you get rid of the material too much you actually hurt performance because the saw will overheat.

I'm still looking into it.

From what I think I understand, adding with to a port is like bumping lift on a camshaft and hogging out the port to make it taller is like adding duration. Of course adding height to the top or bottom also affects "valve timing" and "overlap" when you consider both intake and exhaust. The rest (basically everything outside the cylinder) seems more akin to head porting which is where your fluid dynamics comes into play. Any of that that's wrong, please correct me. I'll be d@mn3d if I could put any of that into practice.

 

[Built6spdMCSS]

That's actually on the correct perspective given how two stroke works. You can mess with the timing also with the flywheel to the coil so there's that.

The thing is, the aluminum helps absorb heat and transfer it out away from critical parts like the gaskets and seals. You open the ports, more fuel and air in makes more heat, and the less metal can't absorb it to transfer it out so you damage stuff. Light port and polish gets some gains. You go to extreme you'll melt one down.

I still want to do a 461 for funsies tho..the design of them is awesome.

 

[Built6spdMCSS]

Looking over my angry little chainsaw for some work I have to do this weekend. Bar is about wasted so almost time for the newer one I got for free a while back. 🙂

That roller sprocket isn't supposed to be pointy, bar is atleast 11 years old so it served it's time.

 

[Built6spdMCSS]

We've been having some pretty rowdy storms down here today, one came through with a funnel cloud bouncing around through the atmosphere. Touched down just a little bit around me and some other houses, took this tree in my front yard and flung some branches off the top of it, one of them landed down on top of my car.

Not how I wanted to spend my Sunday afternoon. No damage to the car, the branch was hung up in the tree so that had to be cut with my pole saw and pulled down. MS261 in for the cutting work, why I have the tools I do.

 

[joesregalproject]

Last week I got a really great package deal on these two saws.

One is an 064 and the other is an 044, respectively number 1 and 2 on my most wanted chainsaws list. Both have good compression and ran. I cleaned up the 044 with deagreaser and put a fuel filter and a spark plug in it. It looks a lot better and should be a great ugly runner.

The 064 is one of my favorite saws Stihl ever made so I want to make this one nice. This one is fine as it is, but I'm going to have it powdercoated and do it up like new. I got extra lucky with this one in that it has the desirable Bing carb and Kolbenschmidt cylinder.

 

[DRIVEN]

 

[RabbitHoleSS]

joesregalproject Well since guys on here usually have an answer for everything,I figured why this thread would be the best place for my question. I have a stihl 193t.

This is the closest chain I could find at Lowes today.

I found the right stihl chain on Amazon but I have a ton of downed branches I'd like to cut up today. I just don't want to ruin my saw. So my question is can I put that .050 chain in my .043 bar?

 

[ck80]

joesregalproject Well since guys on here usually have an answer for everything,I figured why this thread would be the best place for my question. I have a stihl 193t. View attachment 224121
This is the closest chain I could find at Lowes today. View attachment 224122
I found the right stihl chain on Amazon but I have a ton of downed branches I'd like to cut up today. I just don't want to ruin my saw. So my question is can I put that .050 chain in my .043 bar?

No.

It's the width of the channel in the bar, .050 inch. It'd be kinda like putting a .010 piston into a standard bore in an engine