Mastermind
Work Saw Specialist
I like to scuff the bore with 320 grit sandpaper. I like to think it helps seal the rings faster.
Stihl 026 Stock / Ported Comparison Pics
- Thread starter Mastermind
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I like to scuff the bore with 320 grit sandpaper. I like to think it helps seal the rings faster.
cowroy
Addicted to ArboristSite
Thats what I needed to know! I wasn't sure if it made a difference or not where the old ring travel area was.
Very nice work, and what I like to see. I have a straight gased 026 under the bench that I will hopefully be working on soon. This gives me a good idea on how to start.
thanks
thanks
parrisw
Tree Freak
Well there is your problem. You were thinking. :msp_w00t:
I've hones many cylinders actually. All the saws I've done, the rings have seated, honed or not.
deezelman
ArboristSite Operative
awsome thread. keep up the good work and thanks for the free info.
Stumpys Customs
Stumpbroke
I know I've beat this thread enough, but I have'nt been takein allot of pics lately. I'll start doin more build threads now since I got High speed Innernet.:hmm3grin2orange:
<A HREF=http://www.arboristsite.com/chainsaw/176046.htm> MS290</A>
<A HREF=http://www.arboristsite.com/chainsaw/176046.htm> MS290</A>
Tree Wacker
ArboristSite Operative
i'm not trying to Hijack your thread mastermind but can you all tell me what kind of tools you useing to port these saws with? or is it a secret or something if it is i understand if you can't tell secrets :msp_biggrin:
Mastermind
Work Saw Specialist
I don't have any secrets. What I'm doing to these saws is nothing new or different. I would love to think I'm doing something special, but it's all been done before. 
The small tools are dental drills. They use 3/32 burrs with a flat spot on one side. The one on the right is gear reduced and turns slow with a lot of torque.
Doing a 346XP without a angled handpiece is tough, not impossible, but tough. These ports have been widen and raised.
The small tools are dental drills. They use 3/32 burrs with a flat spot on one side. The one on the right is gear reduced and turns slow with a lot of torque.
Doing a 346XP without a angled handpiece is tough, not impossible, but tough. These ports have been widen and raised.
Sprintcar
Chainsaw Slut
Once again "Great work from the hills of Tennessee".
Yeah Chris you should have kept that dam saw. Now you will never hear the end of it.
Great thread Randy, get that oiler fixed on the Homelite?
Yeah Chris you should have kept that dam saw. Now you will never hear the end of it.
Great thread Randy, get that oiler fixed on the Homelite?
Mastermind
Work Saw Specialist
Once again "Great work from the hills of Tennessee".
Yeah Chris you should have kept that dam saw. Now you will never hear the end of it.
Great thread Randy, get that oiler fixed on the Homelite?
Yeah Jerry, we found that the EZ was missing a check ball in the pump. It works great now. Jon is going to put the saw you sent back together.....just a matter of finding some time.
komatsuvarna
Arboristsite MVP
Where you get the burrs at Randy? How bout the dental grinder? Will the dental grinder take the burrs that the dremel uses? Same shaft size?
Mastermind
Work Saw Specialist
Durand, the dental handpieces came from ebay. I bought a big pile of drills and parts that are fairly old.....I think. They take 3/32 shank burrs with a flat spot on one side, so no they aren't the same as dremel bits. I get most of my burrs on ebay as well. The 3/32 ones I cut off and grind a flat on for the dental tools. I chuck the drive end of the dental piece in the chuck of my regular handpiece to drive them. I'm sending a couple dental drills to Wiggs in hopes that he can come up with an elegant adapter for them. 
Smokepole
ArboristSite Member
Here's a little trick I've picked up for the 026. The squish band hits just the edge of the piston when the base gasket is ditched, this allows it to clear, and raises compression a BUNCH.
This shot shows how much the muffler must be milled out to fit now.
This is a clean saw. DSS sent this saw here in exchange for some port work.
Did I mention I do port work for trades???
do you dress the ring on the dome after you remachine the squish ? Looks like it would be a hot spot potentially leading to detonation.
this takes me back to sled dragging days. PS: I love the sound of a pencil grinder in the morning
chopperfreak2k1
Addicted to ArboristSite
wow. dental tools, now thats thinkin!
MechanicMatt
Cut Split Stack Burn
Randy what do you do with open port transfers. All you other "porters" can answer too. I saw what stumpy did on that 290, he kinda massaged the upper area. Have you guys ever done anything really wild with them? Really curious, I know they will never run like a closed port but it seems like Im never gonna find a closed port setup for my lil husky so I was wondering what I can do to a aftermarket 55 cylinder to wake it up.
Tree Wacker
ArboristSite Operative
Durand, the dental handpieces came from ebay. I bought a big pile of drills and parts that are fairly old.....I think. They take 3/32 shank burrs with a flat spot on one side, so no they aren't the same as dremel bits. I get most of my burrs on ebay as well. The 3/32 ones I cut off and grind a flat on for the dental tools. I chuck the drive end of the dental piece in the chuck of my regular handpiece to drive them. I'm sending a couple dental drills to Wiggs in hopes that he can come up with an elegant adapter for them.
what do you use to power them so that you can port saws? i been looking on e-bay and i found a lot of them but they don't come with a motor or anything.
Mastermind
Work Saw Specialist
I've cut a 35° angle on the dome edge. It doesn't really show in the pics though. I also use a fine file to add a little chamfer to the edge of the piston while it's turning in the lathe.
I'll be doing a open port 55 soon. I'm thinking auxiliary transfer ports.
I chuck them in a handpiece.
parrisw
Tree Freak
This is what I have. Mine was a little more but it came with a straight piece as well. You can adjust the speed with the control unit and its got a foot pedal for turning it on and off which is great.
Dental Lab MARATHON Handpiece Contra Angle Nose Cone US | eBay
Tree Wacker
ArboristSite Operative
i might have to save the ad and get me one of them when i get into porting saws for fun and stuff LOL.
CWME
ArboristSite Guru
How much are you turning off the top of the piston? Would that "trick" hold true for a newer 260 as well?
