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.

@2STROKESTUFFING

2 жыл бұрын

Thanks!

@kevinsellsit5584

2 жыл бұрын

Watch the KZread video ... The series of shockwaves from this explosion in a tunnel

@robertmckay694

2 жыл бұрын

You can tell he’s a teacher. I’ve had several two strokes in my teens, a Yamaha fs1e, yz125, tdr250 and a dt400 and I never knew exactly how everything worked until now.

@EMMX39

2 жыл бұрын

Exactly. Noting more to add

@josh012345

2 жыл бұрын

@@2STROKESTUFFING I would love to see the demonstration done on the space station, with zero gravity to act more like a gas, I'm not 100% sure it would work.

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

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.🤪

@2STROKESTUFFING

2 жыл бұрын

😂👍

@tylerdrummond4609

2 жыл бұрын

That's bloody hilarious! I genuinely laughed my ass off, as I'm sure you did once you discovered that lol

@vipervidsgamingplus5723

2 жыл бұрын

The motor I had was vibrating the choke lever down so I would have to turn off the choke while riding and hope I didn’t have to make any sharp turns. I just tightened the bolt on the choke to solve that.

@jesusisalive3227

2 жыл бұрын

That's classic!

@paddy2661

2 жыл бұрын

That's awesome bugger with choke , but I bet your mum was happy with the performance upgrade.

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

@2STROKESTUFFING

2 жыл бұрын

😁👍

@ackiid

2 жыл бұрын

Yes, this 😂

@2t-moto-jc223

2 жыл бұрын

Perfect on P30 pro 👌

@mychoppaeat

2 жыл бұрын

@@2STROKESTUFFING First time on my OnePlus 9 Pro phone seeing this aspect ratio it's perfect!

@Godfather_of_the_Oath

2 жыл бұрын

Fits my LG Velvet like a glove!!

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 .

@donniebaker5984

Жыл бұрын

he failed again to explain how it all works !!!

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

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.

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.

@dksoldierdk

2 жыл бұрын

I linked this on his previous video kzread.info/dash/bejne/YqOYuNyMl9jMms4.html&lc=UgzxS09m4RxpKmoty-R4AaABAg.9U-eQso8AqH9UzuKng8gW2&ab_channel=RicM4 Keep spamming him, maybe he will see

@comethiburs2326

2 жыл бұрын

it's been tried, it leaks and jams like a motherfucker. the carbon/oil mix grinds any kind of seal the heat doesnt.

@kortzcom

2 жыл бұрын

They are called "slippy pipes"

@jaynee8581

2 жыл бұрын

@@comethiburs2326 well yes, but as i understand it this engine won't be used for long periods of time, and an engine this high performance gets rebuilt pretty often anyway so i don't see it becoming much of a problem.

@jaydenbrockington4525

2 жыл бұрын

@@jaynee8581 and additionally, if it isn’t going to be run for too long, a synthetic low ash oil could help alleviate those problems, at the cost of lubrication, but if rebuilds are happening frequently anyway it may not matter

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

@2STROKESTUFFING

2 жыл бұрын

😁 yep, same on my phone.

@56Seeker

2 жыл бұрын

@@2STROKESTUFFING I also always watch with sub-titles. The new aspect ratio is perfect for this, the text is under the picture (running 2560x1440 on a single screen)x

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

@Walkercolt1

2 жыл бұрын

Actually a turbo on a two-stroke smooths the power-band and torque curve into buttery smooth curves. Recall the Australian Orbital engine??? If it hadn't puffed a wisp of blue smoke when starting and offended the "Greenies", our cars and trucks would all be using them. A three cylinder 1.3 Liter 200 HP engine delivering 85-100 MPG on any swill at 1:400 fuel:oil.

@donniebaker5984

Жыл бұрын

thats not the way a two stroke expansion chamber works at all

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

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 😎

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.

@mrsnezbit2219

2 жыл бұрын

Yes i made one for my vespa, I found the sheets online it was not very hard to make.. It was years ago and I can't remember where I put them tho

@andrewpaulstancer5704

2 жыл бұрын

I was thinking that maybe like the Yamaha power valve ..sort of ?

@mrsnezbit2219

2 жыл бұрын

@@andrewpaulstancer5704 power valve is a nice thing but we are discussin on having cistom ignition timings

@charlesangell_bulmtl

2 жыл бұрын

@@mrsnezbit2219 😮‍💨😮‍💨😮‍💨

@mrsnezbit2219

2 жыл бұрын

@@charlesangell_bulmtl mh?

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 👍

@donniebaker5984

Жыл бұрын

you still dont know anything how a two stroke works ..you dont have a clue about the pipe

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.

@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!

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.

@marcelpursche5339

2 жыл бұрын

I think he intents to use this engine only at full throttle and resonance rpm. Kind of like a stationary engine that would always run at a constant rpm. The clutch and CVT will ensure that the engine rpm(under load) can be the same no matter the speed of the vehicle. So a very narrow power band isn't an issue.

@brannonhudson6868

2 жыл бұрын

@@marcelpursche5339 I think that there’s very clearly an issue with the high crankcase volume not having enough scavenging at below peak rpm, so he cannot spool the engine up under load properly. Only real solutions for more scavenging (beyond piston/port) on a two stroke is pipe induced scavenging or forced induction. If he could have a clutch that kicked in at higher RPM this would clearly help it reach the rpm, but the load from the dyno might still bring it down enough for problems. Perhaps upgrading the ECU to programmable would help get the spark timing to help with piston/port scavenging as well. Complete engine management across RPM and Load is key, and is the difference in a good engine and a good-enough engine.

@emilvlahovic3917

2 жыл бұрын

@@brannonhudson6868 an pipe that has a slider so its rosonant frequency can change would solve his problems too

@brannonhudson6868

2 жыл бұрын

@@emilvlahovic3917 definitely! I’ve only seen 2 functional ones before though. As an engineer I would love to see more, and eventually one to hit the market. kzread.info/dash/bejne/YqOYuNyMl9jMms4.html

@JohnDoe-fk6id

2 жыл бұрын

Yamaha did this on at least some of their old 2-stroke bike engines. It's... quite an engineering feat, to make it work well

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

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

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.

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

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

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 😄

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

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.

@mareksumguy1887

2 жыл бұрын

That’s what power valves are for.

@kz6fittycent

2 жыл бұрын

@@mareksumguy1887 yes

you sir are the only KZreadr 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 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!

@DizziLife

2 жыл бұрын

in theory you should be able to achieve an excellent power band however the engineering challenges for such a project are hard to overcome, ie heat and vibrations. also i think it would never perform (peak power) as good as a pipe designed for the rpm imo

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.

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.

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!

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.

@thomasbarlow4223

2 жыл бұрын

I have one of these Telma electromagnetic driveshaft brakes on my 2001 E450. Looks about the same size and it really makes a huge difference on how heavy the truck feels. It does 90% of the braking down to 10mph..... Never even thought it could be a dyno.

@MetroidChild

2 жыл бұрын

@@thomasbarlow4223 To be fair it's only the part of the dyno that does the breaking, the other part (being torque measuring) happens right on the crank, which isn't very common outside of engine break rigs.

@joshstovall5783

2 жыл бұрын

@@MetroidChild I realize that the load cell will still give an accurate reading but if the engine cant get up into powerband then it's not very useful for an engine that small.

@fastinradfordable

2 жыл бұрын

Your moms a bit large and overly complex

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.

@k2bkuxx

2 жыл бұрын

Yes he's done it in the past

@ThatV12MiataBruh

2 жыл бұрын

@@k2bkuxx I was just about to say that but you beat me to it

@2STROKESTUFFING

2 жыл бұрын

👍 but might have to revisit.

@ellisberry8747

2 жыл бұрын

@@2STROKESTUFFING now that’s exciting

@craigdavies8099

2 жыл бұрын

@@2STROKESTUFFING Thanks for another great video! Have you looked into the pulse intake developed by a gentleman called Ron McCord from the states? I have one of his pulse intake systems on my CR500 and it helped a lot with low end power, surprisingly high over rev too and less vibration. It uses the same principal as a boost bottle but instead of a closed loop it's an open circuit. Adam at Millar Racing Engines has good info, pics and diagrams. I'm sorry if none of this is new! Also sorry for your loss, funerals blow.

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.

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.

@donniebaker5984

Жыл бұрын

alex like you are both total bs ! hehehe

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.

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

@julian9579

2 жыл бұрын

here is the link to the video 😄 kzread.info/dash/bejne/YqOYuNyMl9jMms4.html

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

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

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?

Gotta love smarter every day:)

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

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

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.

@chooyatam

2 жыл бұрын

PTEC for pipe

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?

@I3igTasty

2 жыл бұрын

i heard if you got intake in a range where some resonance charging might happen, you will never get it right with the powerband from the exhaust and it somehow hinders power. So the current "state of the art" is to just make the intake as short as possible as you will never get in the rpm range where resonance might happen. I guess

@celendzeris1

2 жыл бұрын

@@I3igTasty That is interesting, complete opposite of 4 strokes I guess

@2STROKESTUFFING

2 жыл бұрын

The problem is how long the intake would need to be. PiP secondary intake is tuned and will be(after some real life adjustments) around 150mm long if I remember correctly - tuned for 19k rpm.

@tinolino58

2 жыл бұрын

I have an adjustable length airbox. If adjust just a few milimeter it provides 10% more power. At 140 degrees of inlet its around 22cm to the adjustable reflective wall. Yes Its a 8000rpm moped not your 20000rpm hell machine. But a proper airbox does a great job!

@ValExperimenter

2 жыл бұрын

I tried this approach on a kawasaki h1 and it works but it plays havoc with the carburettion and I could never get it right, the mixture gets much richer as the intake approaches resonance. part throttle would damp the resonance. Eventually I went to a shorter intake and it works though the maximum torque is noticably lower. I have a fuel injection project to fix this.

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.

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

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

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

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

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

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

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

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

i am enjoying your thought process. thanks for sharing.

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....

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

Your explanation of this subject was good. Great work!

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

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

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!

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

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

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

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

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 .

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

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

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

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

This is quickly becoming a favorite of mine. Thanks for sharing your knowledge!

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

Good to hear Destins words reached you~

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.

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

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

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

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

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 the trouble shooting, Good Job and thank you!!

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

Thank you for an excellent explanation of 2 stroke working!

Excellent episode. I love this sort of troubleshooting. Also - loved the aspect ratio - happened to be perfect for my screen :)

Awesome man...you have a great deal of knowledge. Thanks for the video.

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.

4:53 This is spot on explanation. I have wounder how the expansion work. Had on my moped back in the days. but didn't relay understand how it worked, just that it was better with it.

You make a very good teacher. Good day sir! Greetings from Angola, NY

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

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

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

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

thanks for all your videos. your a great help on 2 strokes.

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

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!

Excellent description; I learnt a lot. Thank you.

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

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

Fits my screen better now. Thanks!