Stihl 029 super to 039 conversion

[Gentleman]

Ok. Is it a new design or what's up with it ?

He's done it since they first started making that cylinder. No one has yet told me it is better performance. It's not quite the same as true closed port. The transfers have no curve like the closed port cylinders. We'd need someone to test both and give us some results.

 

[Gentleman]

The closed port feature should be listened in the description if its not already. I might have gotten that ovee the cross

I'll have to get a photo of the inside and include it.

 

[Mastermind]

We're cool here as long as @Mastermind approves.

Oh yeah. I think being able to post links to other saw related sites is very important.

Did your kids have a good Christmas Mr. Bruce?

 

[Gentleman]

Did your kids have a good Christmas Mr. Bruce?

Of course. You missed our Christmas party. Did @exCanuck loose your invite?

 

[Mastermind]

Of course. You missed our Christmas party. Did @exCanuck loose your invite?

I heard he got banned for spamming our members.

 

[Gentleman]

I heard he got banned

I am afraid he'll completely loose it if I ban him. He's pretty emotional. I don't know what he would do without me.

 

[Mastermind]

I am afraid he'll completely loose it if I ban him. He's pretty emotional. I don't know know what he would do without me.

I'd be lost without you too.

 

[dall]

i didnt get invited

 

[Mastermind]

i didnt get invited

Don't feel bad. Steve lost my invite.

 

[dall]

Don't feel bad. Steve lost my invite.

i say dont ban him just tell him he has to be on here 18 hours a day for a week

 

[dall]

he wont forget us then

 

[94BULLITT]

I just ordered a 390 cylinder for my 290 today. If I would have known that the Hywaw and Stens were closed port I would have tried one of them.

 

[Terry Syd]

I was concerned about the wide transfer ports. So it appears these jugs are being run without any problems with the wide transfer ports. Crikey, I may have to disassemble my running saw and install one of these jugs with the domed piston - just because it is available.

I'd like to see this jug under the knife of a tuner.

 

[Terry Syd]

He's done it since they first started making that cylinder. No one has yet told me it is better performance. It's not quite the same as true closed port. The transfers have no curve like the closed port cylinders.

Just from the pictures, the transfers do look like they can be improved. I suspect that there is a reduction in transfer tunnel area in the region of the 'bridge' across the tunnel. A TS-400 piston, plus some re-casting inside the tunnel, to enlarge it, at that opening and putting in some curve could open up the flow. - It really looks like it has some potential.

 

[Dub11]

Iam right there with ya Terry I like these over looled saws plus the idea of turnin something mundane in to a performer excites me.

 

[kkemp]

I got the cylinder put together last night . Gonna try to pressure vac it tonght . Hope it passes .

 

[Dub11]

Can you snap me a pic of what you used to seal off everything because I usually just throw to together and hope for the best on my poulans. But this saw is going to my big ass uncle so I want right plus he cuts hedge so its goimg to take a lick to say the least.

On the vac test please @kkemp

 

[Bob95065]

View attachment 45003 View attachment 45004 View attachment 45005
This is how I do mine. If you drill into the center they get really loud... these are the pictures I send to people before performing this surgery to let them know what they are getting. I just use a drill, file, and a cut off wheel to do this mod. They really do run strong. I usually fit them with a 20" bar with 3/8" full comp. Without the muffler mod the saw is a real dog. I was very pleased with the outcome of this mod. It is hard to believe the difference that mid makes.

I did this muffler mod to the 029 I converted to a 039 yesterday. I have a nasty flu bug and did light duty yesterday. Today I feel worse.

It seems to be more responsive since the muffler mod. I look forward to cutting some wood with it.

 

[kkemp]

Can you snap me a pic of what you used to seal off everything because I usually just throw to together and hope for the best on my poulans. But this saw is going to my big ass uncle so I want right plus he cuts hedge so its goimg to take a lick to say the least.

On the vac test please @kkemp

I'll get a pic when I get home . I used a few pieces out of my mityvac 8500 for it . And a piece of a tube out of a bike tire for the rest .. redneck ingenuity I guess . Lol

 

[Black Dog Chainsaw]

It will be copied as soon as we get the sample.

I have all the stuff sitting in my trunk. Shaun and I need a window of time to work through them and get the machine work and fitting done. As soon as that window opens, I'll make the 2hr drive over to his shop and we'll get-R-done! I'm hoping he'll be around this weekend or next. I'll ship the pistons back as soon as we have the samples ready. Unless you want the samples field tested before shipping? @Gentleman

I only have one 290/390 chassis in the shop right now believe it or not... LOL!