50cc of Supercharged Madness.

[@au1317]

What a cliffhanger! You do realize how insane this project is?? Your patience and diligence are unreal and they continue to pay off. The way you tread into uncharted territory so casually and confidently is unbelievable, and amazing!

[@poorlydunbarvideos1472]

I giggled mischievously numerous times at how the factory gas engine in my 1961 morris was 998cc and put out 37hp. I could have 20 of Alex's engines screaming bloody murder smoking the tires in every gear

[@MrNursi]

Alex is such a tease! I thought we would get just a little screaming Supercharged Madness, but no :(

[@CONEHEADDK]

Imagine he had wanted to be a mass murderer instead...

[@backyard_garage]

slower and unreal diligence he doo more he get form people like u . u spend time he get money and u dont !

[@ludditeneaderthal]

Last time I was this early, Alex was fixing a moped

[@PituWillson]

Hi,when you bent cooper pipe try some annealing first,its helps..and when you shorten a spring it would be harder not softer,the force needed to push it down to same number of mm is greater after

[@chrislucy1812]

Yes, the less coils the stiffer the spring (fewer coils to share the load)

[@theshippingcontainergarage]

Came to the comments to say that... For those that don't know, when annealing copper heat it up to a dull red glow then quench in water. You harden copper by working it or hammering.

[@ThisIsTheInternet]

Is that still the case when the original length spring would have already been preloaded to the length of the shortened spring? If the original length spring's deflection was high enough wouldn't the spring rate go up?

[@spacedogx6694]

"i machined this off camera last week, its nothing special" man that one piece looks better than anything i put on my bikes or mopeds ever. one of many reasons why your projects are so nice to follow along. perfect is only good enough! bumps on the way is expected and you overcome instead of giving up! inspirational.

[@codybuxton]

I thought the exact same thing when he said that haha

[@CONEHEADDK]

but did you have to mahines to have been able to do it? We all stand on the shoulders of those before us, and their tools and machines. Not that I'm not impressed, but thinking over the fact, that I didn't even own a single piece of tool, that wasen't my carpenter dads - I'm pretty fookin' imprssed by, what I got out of my Minarelli in a tiny lady bike frame back in the mid 70s, being the fastest "moped" around - and then having a gear more to pull away from them with.. I knew NOTHING, but just kept on trying and changing things. Daaamn I wish, that I had known something, or/and, that I had had some real ambitions, that could have channeled my drive in a good adult life.

[@GB-vn1tf]

​@@CONEHEADDK yeah man, if I had these tools I'd be building all sorts!

[@richardsweet5068]

More crazy than ever, can't wait to see and hear it run.

[@liljermdg]

That is all I am here for, I don't even watch the videos anymore. I just scan it looking to see if it runs, once that actually happens, then ill watch a video and see how he finally does it, if he ever does...

[@dacianazerinity2052]

This thing is Madness at the core of the word and I am so excited to see how this one runs now! Love the cam pulley for a tensioner, smart idea. Good luck to you! Let's see 1HP per CC!!!

[@TheSunnyTrails]

It’s looking more like 2hp per cc so 50cc X 2 is 100 hp for 50cc can’t wait

[@alejo8820]

Booster 4stroke engines are achieving 1000hp/liter, (around 100hp/100cc) so It wouldnt be so crazy 100hp in a extremely high developed 50cc.

[@MCsMRBONE]

@@alejo8820 I don't know any 1l 1000 HP car... rather 2l with 1500hp and 5 bar of boost Drag cars with power from lets say 2500-4000 HP don't have a 2500-4000cc engines in there. More likely a 7000cc - 10'000cc, lets make an average of 8500cc and 3200 HP, that's 382HP/liter - 38HP/100cc I don't think you can gain much more than 100, maybe 130 hp out of a 50cc, maybe with NOS or something similar could be more..

[@rakersdownnz]

Well done Alex, I love your "use everything that is to hand" approach, function over looks, if it works, its good !

[@stuartbradbury9514]

This build has really turned a corner in how complicated the set up is turning out to be. I hope all the added extras done plague you with faults, fitting all this to a land speed bike is going be a challenge. As always your humour cracks me up, I actually laughed out loud when you said we have both just incase this one is "shit" 🤣

[@mrsnezbit2219]

I just want to see a land speed Gold Wing frame to accomodate all this stuff

[@mrsnezbit2219]

@Edward Elizabeth Hitler so.. a 1960s chopper with super long forks?

[@mrsnezbit2219]

@Edward Elizabeth Hitler it could even be the fastest harley ever made

[@dahhmondz]

@@mrsnezbit2219 nah, piaggio ciao frame 😎

[@afflickracing1705]

@@mrsnezbit2219 LOL - its a long way from the salt....

[@Thijs_NL]

Those hose clamps look very nice for some reason! What an setup!! :D Can't wait to see and hear it !

[@2STROKESTUFFING]

😁They do!

[@mikemills174]

Mekalor clamps

[@mikeb5584]

Should rename ur Channel to “most rebuilt monster 50cc 2stroke” I am amazed at the time effort and tooling u have got to be the “most powerful 50cc 2stroke”!!!! Hats off my man

[@kylesharp9771]

Legitimately never considered that the angle of a boost reference could change how boost is measured. You’ve got some great nuggets of info my friend thanks!

[@user-zi8kb5uk1g]

pitot tube measures the total pressure. static port pressure (Pstat) minus the pitot tube pressure (Ptot) will give dynamic pressure with some compressions inside the tube (dependent of the air speed inside)

[@2STROKESTUFFING]

👍 Thanks for clearing this up.

[@jaratt85]

There's a difference between flowing fuel pressure and static fuel pressure that's just going up against a wall of some sort. I know with nitrous you have to set the fuel pressure while it's flowing or you'll blow stuff up. (David Freiburger showed it on Roadkill a couple times)

[@longstroke1982]

My experience that's only using dead head regulators. If you're using a bypass regulator it makes no difference

[@aroncharlwood1777]

I've set fuel pressure to 1psi in this kind of setup it works

[@SomeGuyInSandy]

Dude, with all the work you are putting in, you deserve that land speed record. Best of luck!

[@CONEHEADDK]

I'd probably concentrate on body form more than tiny power gains..

[@ColaFx]

@@CONEHEADDK "tiny" power gains 🤣

[@CONEHEADDK]

@@ColaFx How many % pr used month of testing and modifying, do you think, he gains? If it's for top speed, there is friction to win over - against the ground and agaist the air.

[@dukie1616]

Oh my that was the biggest tease not starting it up👏😂 Of course I’ll tune in to the next episode, gotta see and hear this new iteration. This is one of the best builds on KZbin. Keep up the great work!

[@cameronf1460]

I'm not sure how many more times I can handle the suspense you always leave us with! But i love this long term build thing you've got going on. Most other channels I watch finish whatever type of build they're doing within a couple videos then its onto a different project.

[@leegarrett5469]

You might want some beads on the aluminium sections of boost pipe to stop the silicone popping off. I'm excited for the fire up 👍

[@Matthew-wj8cm]

Definetly the first time I've seen someone use a torque wrench on carburetor bowl bolts. Amazing job, both in filming and engineering. Absolute perfection!

[@lousbits]

I love seeing the large diameter pipes on the intake. So many 'tuners' dont realise how wide a pipe has to be to make a 90 degree bend and think that compressed air flows like toothpaste.

[@jamesalbanito1317]

It's roughly half the flow rate for every 90° bend - so increasing the diameter or pressure (but only to an extent) is the best way to keep the CFM constant. He's got some very good dynamics going on by increasing the tube size - oddly enough, it's by necessity because the carb inlet is so darn big - but it should work excellent.

[@tomboxyz5564]

If you want to bend copper pipe, the straight ones are hard, if you buy it on a roll it's annealed and soft to bend, you can also anneal the straight ones by heating them with a burner (get them to before they start glowing red) and cooling them with water

[@davidjordan4770]

I've followed you from the beginning of your creative endeavors here on KZbin and I admire your persuit greatly. I see you checking the timing by hand several times in the last few videos. Might I suggest mounting the timing light on a stand in the appropriate location and using a webcam to send the image to a monitor next to your Dyno display monitor.

[@captroft]

I had a similar fuel regulator and what I did to lower the initial pressure was to add a slice under the top, you could cnc one or just cut it out of plate. I had a fuel regulator that I broke so I milled the top down to make a slice, worked a treat.

[@NotJo4Ever13]

LOL. “I’m building a supercharged 50cc 2-stroke engine… by the way… if this is your first time here…” A summary that tells the entirety of the story with none of the pain that was endured along the way… Such a Norwegian summary. “Here is a fact. The end” 😊

[@kevincrenshaw9588]

thank you for the laughter.

[@kevinoneil7532]

Shorter springs may have less preload, but are stiffer. You should shorten it by heating a couple of coils while under some pressure, say in the vice. Coil springs are torsion bars coiled on themselves, so the longer the wire/torsion bar, the softer the spring. Cut this and it is stiffer

[@Liam-ir6xm]

you know its gonna be a good night when a 2SS video gets uploaded

[@theniabensea2869]

Alex, on top of all the amazing stuff you are doing practically, I marvel at your broad range of English technical vocabulary. 🤩

[@painkey1189]

Look. I've been watching for a while, I'm thinking almost 3 years. Thank you for being the best teacher I've ever had.

[@Simon998]

Rotrex, Lectron, Aeromotive, this has tuned into quite the extravagant build! Can't wait to hear it run and cracking 20k+rpm. You've created a monster.

[@colbycramer1214]

I showed your mother 20,000 SPM. That's strokes per minute in case you were wondering and I too have created a monster... cheers 🥂

[@TheCheeseWedge]

@2STROKE STUFFING “Hot Rod”(1979) was one of my favorite movies as a child, my hats off to you for the music choice and overall presentation of your videos. Impressive work with an eyes wide open approach. Jason Top Secret Motor Solutions

[@robskater]

Absolutely loved this video. There's no chance you cut and edit this all yourself? Pure funky jazz vibes. Inventions are the key to evolution.

[@rightsidelanechoice7702]

You don’t need a pressure regulator if your running a return line. If you just circulate the fuel above the float bowl with a line Teed into the return, the hose will stay full with no pressure only gravity feed and the carb takes the fuel it needs as it needs it.

[@dank_productions94]

Never thought id see a 50cc with a 3" intake on it, this is a very cool build, been following for a while now

[@MichaelJohnson-xu7oq]

Cant wait!!! SO much progress this video as well, great work! Impatient to hear this work of art rev to the skyyyyy 💥

[@owengrossman1414]

You can use much smaller diameter tubing for the pressure taps. There’s no flow through them so you don’t have to worry about pressure drop due to any restrictions. You also get quicker response because of the smaller volume in the tubing.

[@davidmurden1831]

Not looking for response, just flat out get up to top speed as soon as possible

[@jakestillman2147]

Best channel on KZbin! I've already worn out 2 sweatshirts and I'll be ordering another! Keep up the great work.

[@lucaskeersmaekers6651]

While I am still learing to tune my 2 stroke moped, you are doing some truly incredible stuff with that 50cc engine. It is so motivating to me and it makes me want to learn everyting there is to know about 2 strokes. I wish you the best of luck and hope you achieve what you have been chasing al this time!

[@HighDefBNG]

3:12 That pump sounds like a V10 F1 car at 330kmh. lol

[@norcalranger]

So impressive - explaining complex mechanical fabrication in a second language.

[@malcrandall1309]

Yes, he's very good isn't he!

[@IlianAngelov]

Can't wait for the first start of this monster!

[@jaratt85]

first start number 3.569

[@IlianAngelov]

@@jaratt85 I mean with this configuration :)

[@ElderlyIron]

Been loving the series. I can't help but mention the location of the pitot tube might not be ideal. In my pea brain, the peak velocity will be on the outside of the curve while the inside of the curve is riddled with eddies.I know you placed it to be centered in the tube, but the airflow will certainly not be laminar throughout. It might even prove to be quite interesting to actually measure the pressure by raising and lowering the tube while running, or while just running the supercharger off the motor. After all, you already have the motor set-up! I know I may be way late in mentioning this, as I also know what kind of time it takes to edit out 24 minutes of 8 hours of raw footage!

[@dagroarsofteland2003]

Remember that the the return Line from the presisere regulator needs to be larger than the supply. The return line is atmospheric and thus needs to be bigger to flow the same amount.

[@guidorollard2944]

ok it worked finally but you have to use very fine sand and stamp it , closing with ducktape no good. and heat carefully with carbonized flame the copper tube to get soft for more perfect no flat spot bend

[@jaybirdls1]

This thing just went from wild to unreal!! Looking forward to seeing how the changes improve everything!

[@jake265311]

Probly the only youtuber I don't have skip around in the videos. Sucks me right it!!! Great work

[@robinward3003]

You need to anneal the copper tube before bending by heating up the tube to a dull red followed by dropping it into cold water. Bends much easier.

[@danashay]

very exciting! Can't wait! Are you considering a pilot half your size for the speed run? what kind of weight class are you looking at? Will you build a frame for the bike? So many questions! Still much fabricating to do,you certainly seem capable!

[@jasonbirch1182]

If you're running a pump that will pump either direction with reverse polarity, you could switch polarity for a few seconds after shutdown and drain the oil out of the pump and line back into the reservoir. And you just have to turn it on a couple seconds before you restart the engine.

[@jasonbirch1182]

I didn't realize the oil was the traction fluid as well. Maybe a solenoid valve in the system to shut off when the pump is not running to prevent it from draining into wherever you don't want it draining?

[@andythorne1261]

hi I hope the pulley bearings can handle the rpm's , wouldn't a pressurised fuel tank be easier, starting to look quite professional now though, loving the process, if you can get the torque cerve similar to the learning curve you will have made it,

[@paddy2661]

Heat the tube then bend same as bending perspex. Awesome work mate. Edit first time saying YOU bugger of a SD card just 2 more minutes to watch it run , looking forward to this .

[@raph151515]

bending tubes filled with sand is a good technique, to work best, secure the ends with solid plugs (cork) that you fit by force because without inner pressure during the bend you will lose more volume. Another way which is more time consuming is to pour lead in the tube, please pre-heat the tube before pouring ! otherwise it could explode the molten lead. then when cold you can bend it easily without plugs

[@86Motofreak]

Unbelivabile how much work you put in one video! Everytime i think "why simple"

[@malcrandall1309]

When you think of all the time taken to edit and choose the music, what we see is only a fraction of the time taken to produce a video. We appreciate your endeavours.

[@christianjensen9174]

Beautiful:D. I can't tell you how excited I am to see the next episode and I've only been keeping up with the project for about a month and a half now 😃

[@WireWeHere]

The belt tensioner installed nearer the drive end can increase the belt's contact arc and improve grip.

[@Wouldpkr]

Dump valve needs to be straight off the 90 so it works properly giving the air a smooth direct path out of it.

[@B53G]

this is going to be a beast of a 50cc! love your engineering journey. dont know how much boost you'll be running put some beadrolls on that boost pipe if you haven't already. usually (in the automotive) the boost Reference goes as close to the source as possible and in the boost pipe, the silicone coupling could leak and that will cause some ponys to be lost. wanna see you succeed with the best results possible! Great project

[@live4glamis]

“We’ll start it up next time” No! You’re gonna start it now while I watch and giggle! 😂 Nice work!

[@thedarkknight1971]

08:20 - Yeah a handy little trick that. Had a Honda Accord 1.8i VTEC that a rusted power steering cooling pipe (near the coolant radiator), and sure enough a pin prick hole appeared causing me to lose power steering fluid. so, a 1 metre length of ally tubing 12mm dia, some sand, and a gentle bend later, I had a new/home made cooling pipe, worked ace too! I think you might have pushed the copper piping a little too much with the thinner wall it had (my ally tube was approx 2mm thickness). but nice job you mad bugger! hahaha 👍👌😉 😎🇬🇧

[@popeyeman69]

What a neat setup this turned out to be. Looking forward to seeing it run, bet its going to be great once you get it tuned

[@ronaldbunk9007]

Dude! We're waiting to hear it run!!! This is crazy fun. I did so many 50cc tuning with the older ones. But this is really nex next next level. Thanks for your lessons.

[@sjefleenaerts7277]

I love how his video doesn't need click bait as it is already unbelievable

[@bren42069]

Wow, that is amazing! Can't wait to see it run

[@chrislucy1812]

Be careful using any loctite sealant or threadlocker on air systems, the fumes can cause cracks in polycarbonate sight glasses and other plastic items. We had several failures at work before we finally sussed the cause.

[@DanielFrost79]

The title is spot on. It's gonna be a beast when it's done.

[@johnmoe2806]

This is going crazy. Can't wait to see the final results and hopefully successful runs with nice results. And with this video and a real marathon I have caught up. Love your channel.

[@markthompson9914]

OH U GIT😂 I was looking forward too seeing that run. Oh well I’ll have t wait ✌️🇬🇧

[@ibleedswede]

Try annealing the copper pipe first, heat it cherry red at the bend site. Its much easier to get a good bend.

[@stevesloan6775]

I love your background Jazz track and the way you lower and raise the volume throughout the video. I had a few YZ80"s and YZ125"s way back in the 1980's... I ported them, raised their compression, lowered their exhaust port, big TZ125 reed blocks....Those modifications made massive difference to power. It was so good to learn as a young teenager, as you had to put in a new single ring in every 4 days riding days, too keep its running perfect. Oh and you had too change the jetting for different elevations and barometric pressures. Those bikes were so much quicker than any standard bike. Revved so high, sounded electric.!!! ; )

[@billyking722]

Dig the sea shanties in the back ground fascinated by what you are doing keep it up going to see some great hp figures soon

[@ronniejarvis2679]

You can measure belt tension sonically by plucking it like a guitar string and observing the frequency with some sort of recording device

[@jamiestotz2516]

I think Gates makes an app for that.

[@mimimimi9679]

you are a master of suspense it 's horrible , i want to see and hear this motor screaming . thanks a lot for your work

[@timothystark5986]

Love the empire of dirt reference! Keep up the videos! I love them!

[@evilelf5967]

Aha! the old heater made a cameo...miss that from the early days.

[@gfg_horseman7159]

14:31 thats what she said, love the content by the way, I have an affinity for 2 strokes and seeing this gives me hope for humanity.

[@WreckedRevival]

Yeah I'm definitely liking the looks of this setup a lot better, hopefully it performs better than the last once all the quirks are worked out. Awesome work as always! 😎🤙

[@oliverscorsim]

Sorry I haven't watched the whole video Alex but the fuel pump won't work if your boost goals are over 5psi ( from my experience being the engine is so small you need alot more to matter). you can order hsr needles with stronger springs for the bowl deal. That will take 6-8 psi base pressure but making it fit is a pain but totally within your relm ov doable. The restriction in the line sees volume not pressure. Two things work from my learning through trial and error is good regulator and pumps or the pressured tank like I do. As far as carbs go a pitot tube is a must for blow through. Just make sure it goes in the charge pipe coming into the plenum. Yours looks way too small for a 3in pipe. I used one a bit bigger in diameter but it's in a 1in pipe. It's all about a pressure differential so your gonna need a way bigger one or smaller pipe I'd go with smaller pipe so the response to the bowl is faster and transitional throttle better. The mallosy regulator that everyone uses but is very expensive is the only one iv managed to work but it took some work to do.

[@adamdelahunty8287]

I can't believe how far you've come. From when you started to this madness machine. Love your videos buddy

[@neilhintz8785]

Yeah good on you, a real doer, I leave stuff under the bench for six months while I think about it then start off on another project. 😁

[@buildsstuffoutofscrap]

It’s gonna be so sick, can’t wait to hear it roar!!👍🏻

[@high-techredneck220]

If you sealed the side of the regulator that had the spring in it and installed a Schrader valve you could use air pressure and an air gage to change pop off pressure.

[@Fletch889]

The next video better not be far away. I'm itching to see this run with the new blower

[@JazzbLu]

I love your work, videos and the music in your videos! Thank you!

[@jerrekt]

That cliffhanger..🥲

[@richardnorman1520]

Did you wait hoping he says 'just kidding' and starts the engine like me.

[@jerrekt]

@@richardnorman1520 yeah fingers crossed for even a couple of braap braaps 😂

[@IanB22]

"Not everthing being experimental ....might be worth the money" - Truer words have never been said ;)

[@acurarl9929]

Absolutely great wrk. Can’t wait for the explosion 💥 in the next video. Hope you have all the spare engine stuff ready to go. Heads/pistons/jugs/belts. But all seriousness can’t wait for next video I do believe good things will happen but I would suggest getting a alternative fuel delivery system ready to swap out if this set up gives you trouble.

[@brianrule5547]

Hopefully not just the one enormous explosion eh ? But I like your humourous thoughts Lol

[@applechocolate4U]

I'm on the edge of my seat, this build is insane

[@stickygrenade99]

very educational and entertaining! I learned a lot about parts I usually didn't care or notice. Thanks for your work, can't wait for 2nd part

[@boltonky]

Great work that rotex has def made it look different in a good way, and can't wait for the next video

[@brianrule5547]

Not a Rotex !

[@jameslawrence759]

I've been watching you for a fair while now and am always looking for the next episode, the jumble of just making it work from what's at hand made me need to comment, great work 👍

[@fuhkoffandie]

You know there's something wrong inside your head, when your blower displacement excessively exceeds your engine displacement😜

[@dirtygarageguy]

On boost off boost? It's a supercharger, it matches the revs of the engine. Sure there's an efficiency range but it's not like a turbo.

[@2STROKESTUFFING]

The pipe makes it act more like a turbo, not much pressure until it starts blocking the exhaust port.

[@dirtygarageguy]

@@2STROKESTUFFING but does that make that much of a difference for the intake pressure readings?

[@tmackinator]

Heat the tube red to bend. keep reheating as it work hardens quickly

[@mrgonk3060]

You also need to increase the air pressure in the carb (eg float chamber), referenced to the plenum pressure. The problem is that your 'normally aspirated' carb will not be sealed to atmosphere, so that may be tricky.... You could of course put the carb in front of the supercharger to avoid this particular issue

[@ІгорАлієв]

One can either put carb on the suction side of supercharger with more efficiency but risk of icing inside carb and mixing fuel with supercharger oil. Or you put a carb into the box, so no leaking of fuel, but a bit lower efficiency.

[@ztyy8185]

Lovely video! I like picture quality and that 70'ties color and lighting shceme. Currently I don't have my own workshop, so I watch your videos with pleasure.

[@ABCDEFGHIJKELA...]

An alternator tensioner should have worked fine, and would have been cheaper, and smaller, with plenty of different sized rollers available. I love what you're doing here!

[@vincebrossy9285]

I begin to regret the amr 500 that I’ve fit on my prewar 500 Triton, prepared for the salt lake records. The rotrex seems so better in your preparation. I’m really impatient to hear and see how your new settings will run. Courage alex!

[@2strokeshrek846]

'make something out of something else' love it👌

[@VUO4E]

that's some killer tension on that belt....

[@Scissors69]

I agree. Looked excessive

[@2STROKESTUFFING]

150nm per rib for new multi rib belts - that's 600nm for this 4-rib belt. Need a gauge to check, but I don't think it's too tight. Keep in mind the tensioner is spring loaded, half of the rotation I did was not moving the wheel but just winding the spring.

[@Scissors69]

@@2STROKESTUFFING - yeah. Fair enough. Didn’t realise about the spring. 👍🏻

[@VUO4E]

@@2STROKESTUFFING Based on the fact that one pulley is pressed on and not forged, I think it's excessive. I'd back it off a bit and add tension if slip occurs. But that's only me - just trying to avoid parts flying off at 20.000rpm.

[@guyredshaw1422]

Amazing progress and a great, entertaining science lesson. just like your neighbours (maybe...), I can't wait to hear it running in the next episode. Well done on the video production, music etc. Thx!

[@M1R00TJ3]

ayy a 24 minute video how nice, i could probably watch a 24 hour video of this

[@poorlydunbarvideos1472]

By far my favorite KZbin channel. No personna, just a smart guy experimenting that gradually escalates. Ill be checking every day for the next video after that ending tho...