Відео

I manage a forest, so yes they are real too.

Yes my next build will have flowed limited case capacity.

Glad you enjoyed it

Yes the top cover goes on and this type has clips to hold the top on its not the type that's held on with a plastic nut.

Hi, the sonic cone provides a sound wave and projects sound preasure towards the exhaust port, much like the procusionpreasure from a firework.

@@marklutwyche8578yes I understand the concept however it takes a certain time (physics) for the pulse to reflect , that’s why true expansion chambers are the length they are - the bleeder pipe seems like a workaround this - would you say your pipe delivers similar performance to a bona fide 20” long expansion chamber proper ? If so I am interested in obtaining one. I have built straight pipes using square tube approx the length of the stock muffler with a sonic plate on the end and 2 tube pipes on either side exiting about an inch before. They DO work and the torque gains are tremendous however they are loud enuff to wake the dead!

@fabzacres-blackcat yes the question about the distance is the key, on a saw we need a short chamber so the sonic wave is more constant and stronger and so would hold back the saw ,so that's where the freeway tube comes in to releive the preasure and shield a portion of the exhaust port to free up flow.

@@marklutwyche8578 you may have found the rainbows 🌈 end here Lutty!

@fabzacres-blackcat I would say a proper expansion chamber of a known shape and size would be better, but if my pipes are developed and fee way pipe is ajusted to cover the port more or less also pipe size is tuned then I would say it could be as good, but it would be loads of work which I would not do I'm just having fun experimenting as a hobby.

Thank you for your advise, it makes sense never thought of the pulse bouncing from atmosphere preasure, and it's the first time I've burnt birch, it dries well.

Oh also there's a face book group I started lutys chainsaw mods and on there is the last dyno run I did with this pipe you might like to see.

It's a home made dyno, I've done a few videos on it on my UA-cam channel.

@ I gotta check em out !

Hi, yes absolutely this expansion chamber won't do a lot on a standard saw as it needs to be capable of overcharging the combustion chamber so the muffler can send the waisted charge back into the combustion chamber.

Yes, that's what it's all about, trying different things, some people don't like what I'm doing and don't believe the results because it's a bit different.

Hi thank you for your kind interest, I would say I'm covering between a quarter and a third of the exhaust port, but you could use a bit less maybe as I've only built two pipes I doubt I've hit the sweet spot but it certainly works great.👍

Thank you Sir, you are definitely an undiscovered gem in the chainsaw world. I've very surprised you have less than 500 subscribers. Is there anything I can do to help get the word out about your channel? And do you have a public email that you're okay sharing with us? Have a wonderful day sir..

@davesherron5665 thank you, please just share and subscribe 🙏

Great ideas and great work and great advice on the Stihl or any saws, thanks mate 😊

I will do another video to explain a bit better, but that saw is not standard and no it would not push much if any more power on a standard saw, but the pipe is designed to scavenge waisted fuel from blow down turbo effect as this saw is flowed and has a turbo crank bigger intake big carb etc and so without the pipe the engine would throw out fuel air mix from the exhaust port the pipe sends back a precusion sound wave to give preasure to the exhaust port which stops most of the waisted fuel air mix coming out and therefore produces more power which shows on my dyno at an extra 2.2 hp the saw already produced 6hp on a standard but just opened up pipe.

I'm not familiar with that one.

Yes probably but I enjoy machining the parts myself, I know they are rubbish without working on them but I find it fun.

​@@marklutwyche8578lol rubish,,

I completely agree, I went mad on lowering rakers and messed a few chains up couldn't use them, but learned a lot.

Thank you for your support, sounds like you got some interesting pipes, my next video is going back to short expansion chambers as I've learned a lot more about how they work and give surprisingly good power.

Well it's possible if the high jet may have been a bit lean, but also I'm thinking maybe that was the carb starting to come loose as that dyno was done before I made the support brkt, I think I need another dyno run.

Lol this is the hobby 😂

A great hobby! 🍻❤️

@HawtSawz86 yes it is I love it.

You obviously don’t work with your hands.

@Red-uf4hr I've been a mechanic for 44 years, not sure what you mean.

That's a good suggestion about pinning the big end, never even thought of it, but the problem could be the case hardening to the big end, but I honestly didn't think about it, it would be kinder if it's possible to drill thanks for the shared interest.

I measured the crank before and after it held true.

@marklutwyche8578 good to know, I always worried it would move a bit.

@marklutwyche8578 we used to do it with bike engines. Worked to stop the thing twisting, but it still comes apart. Given the price of a crank, though, probably a moot point.

@iainball2023 thank you for the input, I always say we learn from each others ideas, others sometimes come up with a sideways idea 💡

Thank you, it's my fun hobby

It feels lighter than my sthil ms362, but I haven't weighed it as yet, but I will do and ile get back to you.

I don't own a compression tester, the standard squish on thease is just over 2mm, 0.85 is quite tight enough, if I went below 0.5 there's a chance of impact and the bottom end wouldn't last long, did you enjoy the video, hope so, thanks for the interest.

The squish isn't necessarily any indication of the compression. The squish is only a tiny portion of the compression volume. With changes to the head shape, the piston shape and the position of the ports you can vary the compression pressure all over the place. You could easily get 2 bar difference in pressure with exactly the same squish.

@@Alan_Hans__ I know that. I just want to know how much compression Does THIS particular saw have with this type of engine.

Incredibly loose squish???😂😂😂

@@plowmaster1206 Exactly, I'm considering it as a "loose" because I'm used to tighter values in this displacement class let's say around .020" to .025" (when you're pushing it hard). Squish is also important because of it depends how the air and fuel mix burns right? So I don't understand why are you laughing wthout anu explenation. In my honest opinion this type of saw in this form will make not more than around 5hp, maybe in near future i will have acces to a dedicated chainsaw dyno and I do have a couple of 54.5cc zenoah clones so i could make some tests.

Sounds good to me, it works that's the main thing, nice.

No it's on the left, video can sometimes flip if you look my wedding ring looks like it's on my right, it's just how video is.

You need to split the wood with the grain, so if they are too long just chainsaw them to your desired length first.

No, sorry it's just my hobby.

Nice info thanks, my cranks are unmarked probably because they are after market, and yes I have some bores at 45mm but I also have 2 that are 47mm, all aftermarket.

@@marklutwyche8578 Whether it is AM or not is rather irrelevant for these saws. They can be described as a commodity. One of the crankshafts you show in the video has PS52 stamped on the crank rod, meaning it is designed for use with '45' and '52' cylinders: 32mm stroke. On the one intended for cylinders with 34 mm stroke ('58' and '62'), unfortunately no markings can be seen, because if there were any, they have disappeared. All the longer stroke shafts I have seen have always had 58 stamped on the connecting rod. Those with a shorter (normal)32 mm stroke didn't always have the '52' marking on the crank rod, but they often do, like the one in this video. Such a built-up three piece crankshaft with the press-fit between the crank pin and the crank halves is a standard on all good quality saws. It all depends on the quality of the materials and workmanship, as well as the final heat treatment. The fact is that Zenoah used a different shaft for their 53 and 62 cc saws. Such saws also had a different design, for example they used an internal clutch which was also quite a lot bigger. The Chinese also sell copies of these larger saws, but they are much rarer and more expensive than the ubiquitous G45xx/G5xxx copies/clones/whatever.

Thank you for the useful information 👍

Thank you, I hope you enjoy my chanel.

OK thanks I will try.

The smokey saw has a carb from a 75cc saw so it only runs clean at mid to high rpm.

Yes it feels great.👍

8hp.. 😂

Yes, it's completely modified throughout and dyno tested at 8hp 58cc

Cheers thank you.

STIHL 034 AV 13.000 m.speed ❤❤❤ inizio anni 90 ? E ancora dice la sua 😊 la cinese a parte troppo fumo taglia bene, un saluto e complimenti 👋👋