Cranking up Boost! Supercharged 50cc Nitro Two Stroke. (Yes, screwed up colors this time, sorry) 

Hey there, thanks for tuning in! Just wanted to let you know I really appreciate all the comments, I try to read and reply to as many as I can! Life often get in the way though. Oh, and I'm working on the color grading, might be a bit desaturated this time...

"Minor piston-grenading speedbumps". Thanks for taking us along for the ride. It's amazing to see your engine doing as well as it is. Your perseverance is commendable!

Even if it resulted in to breakage it was good to see this engine rev to its full potential for the first time.

Thank you for making the chain guard. That was one my BIG concerns. We only have one twostrokestuffing you know ;) I think we all like you in one piece

Whenever somethings goes to an unknown territory for the sake of science, you can't look away. This however is a mad Norwegian with an amazing "why not" mentality. Love it!

I love what your doing here and am glad that your doing it full time now

Been watching silently for a year or 2 now and your content and production is getting better all the time, looking forward to seeing you do Bonneville at some stage 👍

“And adding boost is fun.” What a journey it’s been. So stoked to be watching supercharged 2 stokes now, I still can’t believe it

ah yes, my favourite western series edit: also super happy to see you finally made a chain guard, that bit alwas left me uneasy when watching

I always thought that rotary valve looked abit thin. Loving the content since your full time. You definitely stepped it up

Seems like a good time to add a rev limiter until further testing is done. Would possibly save a lot of time and hassle.

How can you be so chilled while detonating your 2 stroke babies ? Dude you make me smile. Keep it up.

an old English ww2 mechanic was telling me about clearances. their spitfires were on the minimum they were chasing perfection and they were perfect until oil pressure dropped or cooling fluid disappeared. this machinic got to work on some American fighters. he soon noticed the clearances were a lot greater. the American mechanics explained the extra gap was for extra expansion if there was no coolant or lack of oil. to help give them that little bit extra time. maybe just have it a little bit loose but not sloppy until you have everything sorted out then tighten up the gaps when it's race day. keep up the good work, the dream is getting closer

Your music choices now attract me, nearly as much as the mechanical portions. I hold ýou in high esteem, for your knowledge, persistence and of course, your musical tastes.

You are freaking awesome! I am so thankful for you and your hard work and the fact that you share everything online. Thank you. Don’t forget to order stronger belts for the valve pulley! Love the distraction from the current events of our tumultuous world. U crane parts into place without rushin the process. Ain’t nobody got time for the rushin bullshit here; it’s All about the joy we get from sharing in your successes and commiserating in our setbacks. Keep kicking ass and enjoying every second of the process! Thank you for pumping positivity and inspiration into our two stroke centric lives. -CY Castor

It all makes for a great channel, love that new rotary valve, slowly working through it's teething stages, it's a great ride, with each post I keep looking forward to the next 👏👏👏

I got my first 2stroke about 6 months ago and have learned so much from you

Thank you, Alex!

Thank you for covering that rotating chain, my anxiety for your life and safety has been lowered greatly! lol

My favourite RU-vid channel by far, love your persistence, things break - so what!

The soundtrack makes such a diffeerence to videos on other channels. Thank you for that experience in combination with the awesome lens-format... Thank you.

as a little hack: u can use a simple t piece and a moped fuel tap as a very crude boost controller. always good to know when u dont have a boost controller and want to blow up an engine.

Amazing progress, can't wait for the next episode. 👍

Amazing the way it woke up after adding boost

It makes me so happy to see your motors start more and more consistently. I remember the early pip days haha

Great video, your really finding each little thing at a time. With every fix you doing it's getting better and better.

Awesome! Steady progress.

It’s great seeing you succeed a little bit every video brother! Keep it up! I’m pulling for you!

The discoloration actually makes it feel like I'm watching what Burt Munro was doing when he was doing r&d for his engine "worlds fastest Indian"

You're an awesome family man yeah and the color didn't look for you good but you already knew that have a good week and congratulations on the Discovery

I was waiting for that safety cover. Good job! 😁👍👍👍 Keep on rolling💪

Always forward! Keep it up!

Some minor speed bumps? I admire your positivity!

thanks for putting that guard on.... after the last video the need for it was very obvious.

Awesome work...glad there wasn't much damage..... thanks for the content!!!

Gotta start numbering the episodes I'm losing track just watching until I find out where I left off.

Your learning and its revving more thats what this is all about. Learning what will and want work and much boost it will take.

I’ve never seen anything work on this Channel - keep going buddy! You’ll get it one day!

I love your sense of humour (and the engineering, of course) 😁

Good good bunps when I saw 16k! Good job sit! You've got such a following on this! Keep up the good work!

Its been good watching your channel grow its goten me more and more into 2 strokes but cant wait to see what this thing realy does when you get it all tuned up

Dude I think you're a genius and you make great content You're going somewhere definitely!!!!👌

It's good to see, that you make always good progress.

Nice to see that you added the chain guard.

Thanks for another content packed video.. I understand you are playing with different picture effects. The format used on this video seems to wash too much color. Just my opinion though.

A person that succeeds is generally a person who has failed too many times to count but kept going anyway! Keep on keeping on ! Love your vids!

man this shit looks so much fun you have such a sick setup!

that rpm.goose bumps

You have the patience of a saint!

I'm so excited! This has been such a long journey! I know I'm not a patron but it's not that I don't want to! I just havnt got extra money or even enough money alot of the time! It's not that I don't work enough I work non stop since 14 and I'm 42 now! Got my work boots on right now typing this! This has always been somthing I dreamed of doing and beciase of you I now have an idea on ecu or pcm design and been learning all about speeduino! Always been a Tinker guy and mechanic and electronics geek! People call me MacGyver alot if they were older than me. So I know just how much your time and knowledge is worth and I appreciate everything you shown me and taught me! Been a gear head all my life and found motorcycles when my parents couldn't tell me no anymore! Made tons of money but made more poor choices than dollars and been fixing it ever since! Now I finially made some good choices and invested into myself again and it's paying off big time! I never forget who taught me what I know and your on a long thank you list but your up at the top of it! Hold me to it and I won't let you down! Thank you! And cheers from the USA! I'd love to go ride in your country some day so I can smell the air over there and see if it's anything like I imagine! We have beautiful places here but something seems pure about your land. Maybe it's just me making somthing from nothing but I think about this when I'm on long rides alone on warm nites just before dark! You know that time I'm talking about! I want to die and say I got to ride a sunset in every beautiful country on this planet before its too late.

Magisk ståpå vilje 🙌🏻🙌🏻

Way to go buko! That thing is really starting to show serious power!

This engine is crazy! 🔥

Gotta love destructive engineering! Love your work man and I'm looking forward to anything you got coming down the pipeline :)

Awesome watching you move forward, colour a tad grey

ahhhmazing as usual - wow crazy how you thought you might have lost the crank! hahah - luckily just a piston with some detonation - I really think you need to go electronic on your fueling and spark to get the kind of accuracy you want out of this rig and these engines... (oh, and nice work on the safety shield for the chain, your face was right next to that chain with no gaurd.... glad the safety stuff is more in place now!) - oh and lastly, I had very little grading on this one, almost no contrast in the grade...not sure that is what you were going for, check your tool chain and make sure there is some contrast for us in the image ;)

you are one intelligent man

Wow what a great video to start the weekend.

Progress, well done and I am glad to see you feeling so positive despite the destruction.

Revving that high and holding together is very impressive

Nice work. I see you've also found spare end mills an effective way to plug hoses

Eres un fenómeno,Alex.

Not a fan of the this colour gradient. But happy you finally made a chain guard 😂

Holy cow Alex that thing was really humming, seems to have so much power already. Kinda wonder if it can Rev its self into pieces. It's really interesting. I guess you might need to build a test chamber lol

Thanks for another great video

Top stuff chap so love to see your mad videos , if I had the money I'd give it ago . Back in the 80's it was needle files lots of knife edging, , messing with carburettion and exhausts lucky I had the Micron factory on my doorstep and as kids we used to go looking in their skips lol 😆

I feel like I just watched 3 episodes in 1. Your doing great, keep it up…

Excellent progress pal, an electronic boost control solenoid with controller is a must I would say buddy, not only will you get much more accurate boost readings using a MAP sensor but also be able to avoid a linear boost curve through the higher RPMS, reducing load on the components every time you rev her up on the dyno. I suppose it will be needed to provide a lower boost level at times during road use to prevent uncontrollable wheel spin in low gear/low speed scenarios. Keep up the good work bud Watching from the Hebrides ;)

This was an nice experiment, and not that expensive one, yet at least. keep it up!

You know you have a winning outlook on life when you melt a piston and are still stoked about how the day went.

That is a violent little engine I can’t wait to see the final numbers

maybe with the rotary valve u could make 2 smaller holes on it instead of one so its perfectly balanced, and gear it so it spins half as fast, that way it would cause minimal vibrations and stress the whole system a lot less.

Looking good buddy!

that sucker sounds amazing

thanks

That thing sounds crazy

Perhaps a sheet of titanium for the rotary valve ? It would be light AND strong, plus it wouldn't flex. It just needs to be cut and drilled, no welding is required so it's no issue. Suggestions such as a rev-limiter is a good one, but it's still a band-aid solution. Stronger components is the proper solution when chasing big power reliably.

I was scared of that chain and you so close , stay safe crazy viking.

Keep going Alex. It hit over 16,000 rpm before it failed. I believe by relocating the piston ring pin that it will be better. Boost needs a wider gap. I’ll be in your cheering section at Bonneville. I can also wrench if you need an extra.

Really like the old vibe colors. :D

I have worked in places that had an engine dyno. It was designed inside a well ventilated room that could withstand the flying debris of an engine failure. The room also has the controls located outside where the operator is safe so if anything were to go sideways you will be shielded. It would also help with inhaling the nitro fumes. I sure would like to see you around for a while ;)

That's ripping for a 50cc 2 stroker good job man cant wait to see a full psi pull! And sound quality was on point bit your right about color

Genius idea to use the saw blade!

Another excellent video. Love it!

This project is really starting to take off now‼️

On fire! Pmsl control of explosion hahaha ,love it .

Cannot wait for the record attempt!

Great content! Couple of hints: 1. lower the compression ratio for more boost and beef up the piston. 2. If possible, recycle the wastegate into compressor intake (basically, ’short-circuit’ the compressor by controlled leak) or use less gearing on the pulley. This way, you are just venting the fuel and creating pumping losses. 3. Balance the rotary valve?

I always recommend CAD for prototyping (Cardboard Aided Design), it's quick and easy to make changes before finalising in metal.

This is starting to get loose aye ❤it cheers 🍺 good too see your still healthy and functional 💪

Hey, I love your content and seeing you making progress. As working engineer in combustion development for future engines, i recomend you to evaluate your combustion chamber design. Since you are running high boost levels, in combination with a fast burning fuel, it will be better to reduce the squish area due to fact that you will be able to get a sustainable high burn rate with decreased turbulence level. Reduction of the squish level, will decrese the knock tendency. Probably an open-chamber design will fit your requirements since you are not interested in low emmisions at low engine speed near zero load.

god damned! that is A LOT OF POWER for it to just chowder like that

I like your way of creating things. I think you might want to ad a good expansion exaust pipe for more balanced horsepower and a smoother running engine. The returned waves in the exhaust can help stabalizing the vibrations. Keep up the good work, I love it

The smaller valve with the ball and spring in it doesnt control boost by itself... its more a delay valve and its purpose is to prevent the wastegate from seeing any boost until the delay valve hits its pre-set pressure. When the pre set pressure on the delay valve opens, then pressure goes to the waste gate and opens it. This is because when the wastegate is controlling boost on its own, it has to begin opening at a lower pressure to control the peak pressure its set to. The delay valves are also referred to as "boost foolers" because of how they work.

Try and error many times: Its getting better and better. Chapeau!

I think you need an air/fuel ratio gauge, or O2 sensor.

Getting closer to your goal.

Great progress is made fastest with failures! It sounds healthier every new try i think! I did see somewhere around 15k rpm there though. Disconnecting the hose from the wastegate made me laugh and cry inside also. Since im a learned from scratch diy turbo guy I know what that usually does! 😆 Thanks for the videos!

Keep the videos coming!

This was great. Love the video's. Would love to come by when in Norway.