Now, That's a two stroke pipe! 

That was a good visual for the pressure waves in a pipe. I already knew what happens but that's an interesting and easy way way to explain it to people that don't.

I had a similar problem with top end power on my Mum's 50, It was not revving out when she went to get the weekly shop, I tried everything, new piston ,re jetting, saved up for an expansion chamber, I even filed the exhaust port to move the power band up the rev range and trimmed the rotary valve to get more fuel in. Turned out she was pulling the choke out to hang her shopping bag on, Went like a scolded cat once I worked that out.🤪

As a widescreen monitor user I have to say that the videos are perfect now :D

Dude does this in his garage for fun and also helps teaching at a kindergarten. The world needs more folks like this...

Your use of water to demonstrate 2-stroke tuned exhaust gas dynamics was the best I've ever seen

You need to develop an exhaust system like the intake on an SR- 71. Something that is movable and will keep the Power band at max throughout the rev range.

Probably the best practical display and description of how a two stroke pipe works that I have ever seen. This should be the benchmark for any discussion around two strokes and how they work.

Another GREAT video Man ! one thing I noticed that might be a consideration... a little bit of an angle on a float bowl carb is ok , but at extreme angles it becomes difficult to get a sense of proper jetting due to an incorrect amount of fuel in the float bowl. It's an issue that a friend of mine was having on his Quadzilla motor after He swapped it into a Honda chassis. When I pointed it out to him and we made a little modification , It helped quite a bit. Again , LOVE Your channel ! on a side note , My Sincere Condolences on The loss that You are going through .

Excellent aspect ratio. Now it fits the whole width of my screen without using fullscreen viewing. 10/10

Thanks for this! I had no idea that’s how 2 stroke expansion chambers work. Totally explains the peaky turbo like power curve!

That moment when the engine starts to sing at 9:18. Its like it suddenly clears its throat. Great to see, I am learning so much.

As a mobile device viewer, I greatly appreciate your courage not restricting the aspect ratio. Not all heroes wear capes.

When I was Kart racing, I had a similar ignition system. There were companies that made retarder boxes you could add on, to allow higher initial ignition, which then backed off timing by so many degrees per revs. (Amount was determined by what was required and the boxes were tuned as appropriate). I would think something like this with a variable exhaust length would go a bog way to improving power band.

The explanation was so good! I had a good idea of how 2 strokes worked. So you glosses over the things I already knew and got straight to how that magical pipe works. Good job 👍

@2:20 So crank seals are a huge deal! Not only so that gear oil doesn't get into the mix, but also because the loss in pressure on the top end, and more pressure in the crank case. I never knew the volume below the piston was also transferred/connected to the top end. I know it doesn't pertain to your issue, but I'm glad you showed this!

i just saw one of your videos for the first time yesterday ive been on a 2stroke stuffing binge since then thanks for taking your time to make these videos im learning a lot 2 strokes are becoming an endangered species but with people like you spreading your knowledge hopefully we see more 2 strokes around love your work man i will be putting some money to donate to keep these videos going much love from australia brother

The thought, the explanation and the commitment to the craft are appreciated! Awesome instruction. Thanks for taking the time to be a creator and sharing knowledge 😎

I've never understood 2stroke engines. Thanks for giving a great presentation on it. Super cool engine!

Good to hear Destins words reached you~

That water bottle explanation was really good! I built chambers for 250cc micro sprints for probably a decade back in the day and i dont think i would have been able to explain the way sonic waves move so clearly!

An exhaust valve which could change the exhaust timing (power valve) would be able to help your pipe wave timing issue. More duration would allow for a high rpm timing with the same pipe, shorter duration for low rpm. At least using the port timing formulas for pipe effective length from Blair’s design of two stroke engines.

Yes dude, love the video and the breakdown and the process. Can't wait for the next step.

I'm sorry for your loss, condolences go out to you and your family!

You're resonance explanation actually is very clear. I did kinda get it but now I feel like I really get it. Thanks for that and keep the videos coming. You are in my top 3 most enjoyable videos!!!

I’m thoroughly invested in your struggles👍Working perfect the first time wouldn’t be as exciting/entertaining as the trouble shooting is and the engineering that goes with prototyping.

I used to race 2-stroke RC cars and there used to be a pipe called "CVEC" - Constantly Variable Expansion Chamber. It worked really well. Basically the engine was always "on the pipe". Could be that there is a way to make one on a larger scale to help.

you sir are the only RU-vidr i have watched in the last 6 months to use an aspect ratio close to my native AR of 21:9 i thank you

I understood resonance already but for anyone that didn't it was perfect visual demonstration of it. Well done.

Love watching your progress. And I think you're doing fine without RU-vid's advice.

Great video! This sounds like the perfect opportunity to incorporate a slippy pipe! More complicated means better RU-vid content, right ;)

Wow! I’m watching on an iPhone 11 Pro Max and this is the first video I’ve seen that I can watch with my ENTIRE screen! It felt so strange and so amazing at the same time… I wish all videos I watched were this awesome 😄

I definitely liked the visual explanation of the expansion chamber with the bottle. Thanks for sharing your knowledge and your time.

You could make a variable length pipe to help with low speed. Maybe even do the math to figure out the ideal length of the pipe at different rpm's. LOVE the aspect ratio!

Could you make a dual pipe. a low speed pipe and high speed pipe? or a manual clutch on bike lever to get in powerband before clamping dyno?

i really like that you are actually render suff in 21.9 instead of putting useless bars

0:04 I almost fell out of my chair watching this on my ultrawide monitor that's AWESOME!

Gotta love smarter every day:)

Nice ! Pretty narrow band. May be you can also play with the length and volume of the exhaust. I am just thinking about the good old 103 exhaust RGD "pompe", with a variable length on the diverging cone. Another way to implement this on the exhaust is to put an additional chamber with a butterfly like the old Honda 125 CR 1985, it was called ATAC.

Felt like I was at the cinema with this aspect ratio!

That was actually the best description of how a 2stroke works the water inthe bottle really made it easy to visualize

It seems like the dyno would be perfect for testing snowmobile engines or engines in the 150hp to 300hp range. I just have a feeling the eddy is too big for an engine making less than that. Too much bearing, belt and chain drag... I love the concept and it's much better than something I could build, just seems a bit large and getting overcomplicated.

Wow, she really picked up and started to get on the pipe once she got some advance. that power curve will be STEEP! It'll be well worth going to a proper mappable ECU for it, even if you can get it to work with a fixed curve, you'll never get the best out of that little beast.

I love 2 strokes. I'm loving the channel & the aspect ratio is excellent, please keep it if you can.

i love this concept, its like a pulse jet with a piston in the middle. Keep up the good work, this thing has promise

Could you add a second pipe for low-mid RPM and then switch it over via diverter valve once proper RPM has been reached? Almost like VTEC for a 2-stroke.

Have you considered 3d printing a crankcase stuffer to take up some of the volume of the crankcase, and add a boost bottle with a valve, so in essence, you would have a variable volume case.

LOVE the aspect ratio! Suits your style. Keep innovating, great isn’t easy!

finally a youtuber filled out my screen. wasnt expecting mr 2 stroke to do it but man it feels good!

you could make dynamic exhaust that changes lengh with a servo so you have more power at the lower rev range 😄 there is a video on youtube where they did that with a 125cc engine

From my experience wave action tuning NA 4 stroke engines, the Intake tuning is always a lot more powerful than the exhaust. You can have crazy gains with intake runners (+20% to +30% BMEP) that are tuned appropriately. But I guess it works differently with 2 strokes or the RPM is so high that that short runner on the carb is sufficient enough? Maybe that is worth looking into?

Hell yeah things are looking promesing, i can't wait to see the motor in action. evry time i see one of your new videos i get motivated to build my own 2 stroke projekt.

Wow, that was the best explanation of how a 2 stroke pipe works I have ever heard!

If there's one thing Dad loved more than serenity, it was a two stroke engine on full throttle. Listen to that, singing like a bird!

That was the best explanation of how a two-stroke works that I've ever seen bar none thumbs up.

Love your videos and your clear and concise explanations of the theory and your process. I kept hearing "moving waves the wind has left you and you are still in commotion..." by Focus as I watched the wave in that bottle going back and fourth. It shall ever fourth remind me of 2 stroke stuffing. That is a win my friend.

The best explanation and drawing about a 2T engine! Congrats Professor!! things do not need to be hard !!

I used to race 250 cc four wheelers back in the mid 80s . We or should I say the mechanic experimented with crankcase pressure . He used infected plastic around the crankshaft to fill up the empty space in the crankcase. The result was more torque at lower rpms and harder pulling through mid-range and top end . Me being 190lbs was able to compete with the Suzuki factory rider who was 135lbs . It made a big difference in being able to finish consistently in the top 3 of a mx series. I'm not an engineer or understand all the tech about 2 strokes it's just my experience . Interesting video thanks .

You know REALLY much about 2-stroke engines - chapeau! Greetings to Norway.

you sir are 1 hell of a clever man your channel is so informative and understandable to lesser minded people like myself keep up the good work

this is some of the coolest stuff on youtube right now! very informative

I totally get 2 strokes now! Thanks. And I would have never guessed kindergarten teacher for you employment. That's awesome!!

i am enjoying your thought process. thanks for sharing.

love your vids. its always a good night when i get off work and you've posted something. thanks!

Perfect Video... 9:11 is pure excitement. Thanks for your lesson Master. This videos are only for smart people. You can see the brainstorming from your fans who want to see this engine working at its maximum....

Damn thanks for changing to 21:9, looks so much better on my widescreen

To bad we are only allowed to give ONE thumbs up to a video. This vid was awesome because of the very simple and effective way exhaust pulse was explained and shown. How can this video only have 43,000+ views and only 4200 thumbs up ???? It doesn't get better than this.

the quality of these videos have increased immensely, much love!

Your explanation of this subject was good. Great work!

You did not confuse me with your demonstration and explanation of waves, and their significance in the proper tuning of a two stroke engine. Thank you for it!

Followed the pip engine since the start, great work man got it on the homemade dyno and everything!

This is turbo nerd level 2T engineering. The bottle explanation was the best I have ever seen or heard to explain how and why 2T works the way it does. Very interesting stuff.

Great explanation with the water bottle! Now I finally understand those fancy two stroke pipes :)

Now I understand how a 2 stroke pipe works! Thank you. Also, love the wide screen...

showed a lot of your videos to my teacher and you know what you are explaining it would be good to learn from you

That’s a very detailed bong, thanks! Learned a few things

I almost screamed YESSSSSS when it actually came up on the pipe. Love the build man!

I used to fly R/C model planes and experimented with tuned pipes. I found several things. When the engine got "on the pipe", that is, the pipe's tuned or resonant frequency, the mixture leaned out quite a bit and the engine would fall off the pipe. I rigged up another servo to a piece of bellcrank arm I force fit on the carb's needle valve. I could run lean enough that the engine would get up to the tuned RPM and lock on to that speed. I would then shove the tab for that servo to richen the mixture, and it would run well. If I left the mixture at that point and throttled back the engine would go very rich and spit and sputter. I would have to lean the mixture to get it back up on the pipe, which was done by a slight dive to pick up RPM. Another thing I discovered, it was beneficial to increase the height of the sleeve's exhaust port in relation to the intake ports. That gave more time for the intake ports to close, and the back-pressure wave of the pipe to cram more fresh mixture back into the cylinder before being closed off by the piston. The first pipe I made was silver soldered together from brass tubing for the straight tubes and the conical sections cut from the top and bottom of a ham can... hahaha! But it worked well. Later I bought pipes from OPS.

Good explanation👍🏻 excited for what’s to come!

That’s a very good demo. Alex you rock Sorry for your loss Condolences

Lookin good bro, thanks too. I always learn something when I watch even if your not teaching but if u listen close u can catch a lot of info that directly relates to my little motorized bicycles.

the water bottle was a really good way to explain pipe resonance. Keep up the good work!

Thank you so very much! Och! Hoppas du får en väldigt fin jul! Sincerely, Alicia.

I've got a home built 2 stroke cart, your videos are how i got the thing going

I've been riding bikes for years. Both 2 stroke and 4 stroke. And never fully got my head around why the 2t pipe is that shape. Also I'm in my 3rd year of mechanical engineering. This video has explained 2t engines perfectly. Thank you

I love the trouble shooting, Good Job and thank you!!

You made it so easy to understand. Kudos to you and thanks for sharing.

I apologize about the funeral hopefully everything runs smoothly, thank you for the awesome video tho you've been a rad guy to watch build stuff!

You deserve a million likes for making a video that finally fits my galaxy 20 ultra screen!

Wow, must say this video left me wanting more. What a talent with both youtube and 2 strokes💯💯

Really good demonstration. Your approach shows you are a pedagog.

That explanation gave me a good visual of how pipes work on two strokes I now have a much better understanding on why the pipes are made that way

At 52 years of age I was looking for a "POWER BONG",.... THIS video was first in the suggestion box,..... I'm pretty sure tge "ALGORITHM" has no "RHYTHM",..... and that is just the START of this rant😎

Jet ski's actually fill the exhaust pipe partially with water at full rev. to make a smaller expansion chamber. food for thought. Love the video man!

These videos are so cool! Proper clever theory being put into practice I love it!

Great explanation of how a pipe works! Thanks again for sharing in this adventure

When I was a kid, we used "rabbit ear" crankcase stuffers to decrease the crankcase volume to increase the scavenge pressure (McCulloch, Westbend, Power Products, etc.) This gave more power. However, we were using straight pipes or megaphones back then. When transitioning to expansion chambers (and we would gas weld or braze together our chambers in shop class) we got away from reducing crankcase volume.

I love seeing the nuanced humor of different cultures. Sometimes it's the slightest thing but to me it's freaking hilarious. I can't wait for more. ---From your newest subscriber.

Kool stuff man you thought me alot about 2 strokes keep it up and I'll keep watching

This is the first video where the "original" view mode actually fills my phone screen side to side xD thanks !

Anyone else with an ULTRAWIDE smile while watching this 0:06? Its so rare to see video content that fits the 21:9 screen perfectly!