Stihl 029 super to 039 conversion

[kkemp]

I'm not sure what brand it is lol . I get some parts from stens and I was curious on the quality of their cylinders . I'm not sure who makes em . It has hw on the piston not sure what that means .

 

[Dub11]

HW probably Highway and do you have some more pics of the cylinder? Maybe a part number? Do you have calipers to measure the piston diameter? I have 4 cyclinders setting in my shop now 3 stihl and one cross performance and all are open port not closed like the one you picture .

 

[kkemp]

 

[Dub11]

Ya have any outside pics of it part number and a pic of the piston?

 

[Dub11]

Sorry for so many questions just never seen this before.

 

[huskihl]

I've never seen one like that either. Sort of a hybrid. Might run better than stock

 

[Dub11]

It looks cool as hell am glad someone else jumped in here Ithought I was hallucinating

 

[kkemp]

 

[kkemp]

 

[kkemp]

The piston measures 48.87 mm

 

[fearofpavement]

word of advice. Before you put the engine together, fit the muffler to the cylinder to make sure the bolt spacing is correct while it's still apart and easy to adjust if necessary.

 

[kkemp]

Ok.. good idea .

 

[huskihl]

And...not sure how much you know about 2 stroke engines....make sure the ends of your rings line up with the pins, and right side up so they fit under the pins

 

[kkemp]

And...not sure how much you know about 2 stroke engines....make sure the ends of your rings line up with the pins, and right side up so they fit under the pins

Yep that's always a good idea .. I replaced the piston in my 028 s . So this is #2 . I'm not a expert by any means . Lol

 

[Dub11]

So how much was this kit and were did you find it iam totally intrigued.

 

[kkemp]

It was 75.00 I got it directly from stens ..

 

[Terry Syd]

With that window into the transfers, I'm wondering if the jug may have been designed to use the 'slab sided' TS-400 piston.

What is the width of that transfer window, it looks like it may be wider than the exhaust port.

 

[kkemp]

Well I can't measure that . I just got done installing it .

 

[Terry Syd]

I hope someone gets one of those jugs and runs it against the open-port jugs. The transfer flows will be completely different in angles, less mixing and there appears to be more time/area. The timing may be the same, but the transfers will have more area for flow, provided they can be fed by the small transfer tunnels.

Very interesting configuration, I wonder who came up with the design. The Chinese usually just copy a design, not develop a new one.

 

[smokey7]

I am very excited to see somemore info on these hybrid jugs. Never seen a closed port jug for these. I feel like this could be a hot ticket for these saws. At a decent price they look good and if offer better performance its a winner. Someone please scope one out good.