MS440 -> 460 Conversion and Build

[blsnelling]

looks good. So P&C was left alone? no port work?

Oh no! It's ported adn ready to scream. I hope to be tearing it back down soon to get a popup. I'll see what compression is first without it.

 

[Stihl Does It]

:greenchainsaw:Yeah Brad you may have to use your router for this port job!

Interesting thread. I look forward to seeing your newest Stihl rebuild runs.

 

[Evan]

all that work and you put it back together with dirty grungy handle, Brad are you ok?


project sounds like fun

 

[blsnelling]

all that work and you put it back together with dirty grungy handle, Brad are you ok?


project sounds like fun

If I like this saw as much as I think I will, I may sell this handle and buy a new/newer one. There are no breaks in this one, so it would bring decent money. It may even get new plastic too.

 

[Sawdustmaker]

Pease tell me that you are NOT going to just "imagine that it is", and port it without calculating what it is and how it is going to effect how you want to do the rest of your porting.

So.... i know i kind hijacked the thread but...

 

[blsnelling]

Well, the saw is running It doesn't look like it's going to get a popup either. Compression is already 180 cold with only a couple minutes of warm up time on it! It was 170 hot. Can't beat that. I'm anxious to get this thing in some wood.

 

[Metals406]

Well, the saw is running It doesn't look like it's going to get a popup either. Compression is already 180 cold with only a couple minutes of warm up time on it! It was 170 hot. Can't beat that. I'm anxious to get this thing in some wood.

Wow! Good compression #'s!

 

[edisto]

So.... i know i kind hijacked the thread but...

Maybe this will help...

I'm not speaking for Brad, but all of the "math books" will tell you that the math only gets you in the ballpark (especially with 2-strokes that aren't attached to motorcycles). With any porting work the only way to get to the optimum is to cut and try, so a lot of experience will trump the math every time.

My mom bakes excellent bread, but can't tell me the recipe because she doesn't have one. I would need a recipe to make bread, and it would probably be recognizable as bread, but it'll never be as good as my mom's.

 

[Sawdustmaker]

Maybe this will help...

I'm not speaking for Brad, but all of the "math books" will tell you that the math only gets you in the ballpark (especially with 2-strokes that aren't attached to motorcycles). With any porting work the only way to get to the optimum is to cut and try, so a lot of experience will trump the math every time.

My mom bakes excellent bread, but can't tell me the recipe because she doesn't have one. I would need a recipe to make bread, and it would probably be recognizable as bread, but it'll never be as good as my mom's.

That makes sense...

I guess i am trying to ask brad what calculations/fluid mapping he does, versus intuative port widening

what i can do vs. what i can't

 

[showrguy]

Here's a summary of what was done to this saw besides the conversion. The following parts were all replaced. There are a few odds and ends left to tie up, but it's ready to run tomorrow.

1. &C.
2. Crank seals.
3. Cleaned carb.
4. Intake elbow.
5. Fuel line.
6. Impulse hose.
7. Model plates and decals.
8. Air filter.
9. Elastostart.
10. Spikes and chain catcher.
11. Loop handle.

I started with this yesterday afternoon

Factory port opened significantly. Muffler, heatshield, and gasket all port matched to the ported cylinder.

oh, damn, that thing got real pretty........... can i have it back ???
i know, you know, i'm kidding....
great job brad (i knew it would be) i hope ya like it......

 

[Evan]

my 044 is 175 cold, i havent checked it hot yet. i think you said you milled the cylinder. im just am running mine gasketless with the factory cylinder.

i also have the 044 cylinder you guys watched me port. i just bucked 2 cord with the bone stock 044 its not muffler modded or ported and holy cow the thing just rips through wood like no other.

im very impressed with it. im tickled pink.

im very found of modding the muffle through the factory port. lots of potential without adding exstra ports. ill probly get around to moddng my 044 soon.

thanks for shareing your 440 big block project with us

Evan

 

[Wild Knight]

Please ...

Are you even old enough to have beer? lol...

 

[Andyshine77]

Awesome build Brad, I'll be looking forward to running it.

 

[blsnelling]

my 044 is 175 cold, i havent checked it hot yet. i think you said you milled the cylinder. im just am running mine gasketless with the factory cylinder.

Evan

I have done nothing to the crown of the piston or the base of the cylinder. I'm running a .010" gasket to get a squish of .017". I could not run this saw gasketless.

 

[blsnelling]

I guess i am trying to ask brad what he does beyond widening ports and increasing compression in terms of tuning, to optimize gains.

Search my threads. I've shown many times what I do in a port job.

 

[Evan]

i know what he did in the ports

 

[Sawdustmaker]

that is what i thought.

 

[blsnelling]

Ill do that... i will come clarify what i find.

Start another thread.

 

[blsnelling]

Here she is. It's still a little rich perhaps. It's turning between 11,500 and 12,000 in the wood depending on the tune. It's running a 8-pin rim pulling an untouched RSC chain.

 

[Wild Knight]

Nice. So, what's the verdict? Has it supplanted the mighty 460 as your favorite saw?
:rocker: