that doesn't sound like 90k rpm (at all)

This man is making a legit miniature hotrod garage. Cant wait to see the plans for the 13b !

A dynamic compressor is going to be much harder to get down right than a positive displacement supercharger would, but you probably know that better than I do anyway. But honestly, I don't care if it works or not, the fact that you were abled to make that and get it even this far is absolutely beyond cool to me. Very, very cool! I love what you're doing with this thing.

flywheel be like: "aight, imma head out"

Perfect way to spend a Saturday morning after being at work all night.

My neighbor has one of those in his Honda Civic.

Always on the forefront of the scale engine tech. Badass videos as always. One of the best content creators on the nets.

Your work is the best mechanical art on utube. How awesome it must be to be you! To have the knowledge and tools to do the things you do! We all appreciate your channel.

Thank you for another beautiful piece! You consistently manage to make works of art that evoke the same kind of wonder and awe in grown-up me like I had decades ago when building the first miniature steam engine with my dad.

Keep up the great work Jonny! As an auto mechanic and gear head/ petrol head, it great to see people like yourself staying creative and never giving up on you passions and hobbies. If you ever have any technical questions, I may be able to help you with tuning these things for boost.

I've got a centrifugal supercharger on my truck. It has a gear reduction in the supercharger drive and further reduction with the drive pulleys. Yours is direct drive so you really need to overcompensate with your pulleys. Couple that with the unit's small size and you really have to spool it up to create any pressure. I know that your previous testing of gearboxes dictated your use of direct drive. Until you can spool it up properly, you'll never make much boost. Centrifugal superchargers have a rising boost curve. You'll just have to spin it faster to build boost. My v8 engine sees about 2psi at 2500 engine rpm. At 5000rpm, I'm seeing about 6.5psi. At 5500rpms, I have measured 8.5psi. I have a pulley drive ratio of 2:1 and gear drive ratio of 3.61:1. So a final ratio of about 7.22:1. According to the manufacturer, it is capable of 52,000rpms and 22psi. I think your homemade supercharger needs more rpm. Could you build another set of pulleys and spin it up with a drill to spin it faster than your 77,000rpms to measure your pressure? A cordless drill spins around 1200-1500rpms. If you reuse your original crank pulley, you could probably make something work by only making one more small pulley. Good luck with everything. I'll definitely be watching for updates.

Channel is epic bro. Enjoy the videos man thanks for your time you put into everything🤙🏻 I like the machining footage and your take on designe and everything. Keep up the great work💪🏻🙏🏻

From idea and raw materials... to your finished products. I am always amazed at what goes on here. All the best to you, keep up this amazing content.

These videos are so entertaining I'd rather watch them than any movie while drinking my cup of tea :3

Congratulations, even with the tools at your disposal, I don't think it's an easy task to build a balanced carburetor like the one you made, to make the correct "air and fuel" mixture. With this supercharger in your opinion, what is the real gain? Leandro Wagner.

I swear yours is the only channel that I get super excited about when you post a new video. Keep up the great work!

I love your content. Your videos are so professional and everything you build looks so clean. Keep up the good work!

Nice machine build. A couple thoughts; Most driven centrifugal super chargers spin in the rpm range you are running, however they have a much larger diameter on the compressor. The diameter builds the pressure, the vane height builds volume. With that said, boost pressure should be tested while flowing. Negative displacement pumps are prone to cavitation. Once cavitation occurs flow and boost fall off dramatically. You could actually be running more than 0.6lbs. Your motor could be consuming all the boost too. If you measure boost while running, you can see where the boost curve peaks & falls. Keep at it

i recommended in the previous video: put a intake cone on the intake. it helps get air into that small hole. its physics and air pressiure that is limiting the superhcharger.

I love you Johnny!! The work you do is absolutely fantastic!

Good job it is great to finally see the supercharger in proper action

Who else likes Johnny's videos before watching them🙂

This is so damn cool. I wish I had the tools and knowledge to do things like this

Love these videos! No talking, just really cool stuff.

very therapeutic . thank you Johnny it is awesome to see your work.🙏🏴󠁧󠁢󠁳󠁣󠁴󠁿😷

Great work Johnny! I would recommend though that on such small scale(s), the compressor inducer inlet step is to great for smooth air flow. I think you'd get better performance(air velocity) if you bevel/tapper/blend the SC inlet valve to match the compressor wheel's inducer radius. You may also want to consider port-matching all your components. While working with components this scale, every little burr, crack, imperfection, etc. will have a profound affect on air flow. Good luck and I can't wait to see more!

I love this series of videos and am excited to see where all of this goes. Already looking forward to the next updates! A couple things to sort out. When sizing a compressor to an engine, the airflow is what you want to calculate. In order to know if the compressor is the optimal size for the engine, you'd want to sort out the CFM per RPM of both the engine as well as the compressor. It appeared as though the gauge you connected to the outlet was measuring the force of compressed air from the supercharger, but this won't give you a usable number for a couple of reasons. First, the compressor not being a positive displacement unit, won't do a great job of maintaining pressure, even with the centrifugal effect, you'll get reversion at the inlet (also possible if the AR isn't high enough to overcome the pressure difference in the scroll I.E. the inducer air-speed stalls because the exducer doesn't have a high enough ratio, and is being overcome with backpressure). This begs the question if you might need a larger compressor to feed the engine, but more importantly, you can't get accurate information measuring static pressure. You'll need to figure out how to measure the pressure of the FLOW of air inside the plenum. Compressor output is important, but understanding how that correlates to the inlet consumption of the engine is the most important metric. Could you not plum the pressure gauge to the tank backpressure bung? The other factor to consider is that you're not just creating air pressure, but increased flow (ideally). It's possible the higher drive ratio is allowing the compressor to feed just enough air to the engine to match natural aspiration. Without knowing the CFM data across the operating range (effectively, your compressor map) it's anyone's guess. You could play with some math to get an idea where things are now. Ultimately, I think you'll have a better run of luck with a positive displacement unit, where you can calculate linear differences in output-per-RPM. A good starting point would be to measure volumetric efficiency as both CFM and a factor against the displacement of the engine, then build a compressor using that data so you can land squarely in a good efficiency range.

Loving the vids as always! I used to have a carburettor turbo 12a rotary in an rx7 many years ago (suck through set up). One big positive with suck throngh was idle and low end tuning is much easier as you can just tune idle as you would non turbo. And your main jets are turned for positive pressure, but cold start is difficult on suck through. Fuel injection for combustion engines was like lipo batteries for the r/c world... A game changer.

This is awesome how someone is actually doing this for real because you see all these people make all these fake one's like out of keychains and fake stuff I would love to see you do this to a small block or something your very talented brother

Love hearing th S/C spool up. Bigger pulley (thumbs up). I still believe in the blowthrough method... although it's not ideal. Love your work through on this one. Bravo.

Awesome, this has more hp & torque then my Prius!

Wow,very interesting video Johnny!!! I'm looking forward to seeing how the draw-through design will run!!! Hoping it'll be smoother with more gain up top!?!? Can't wait to see the dyno-runs for each!!! :-)

I have to say you're amazing. Plz keep up these videos.

Good job!!! I would put it on my 1/5 RC car! 😁👍👍🏎️💨

I thing the supercharger is running on very low rpm, you should try like 1:15 Ratio, or even more. And i think 3d printed inlet hose is a very bad idea due to leaks.

This guy is a scale genuis. I haven't been into rc stuff in 15 yrs but still watch all his videos soon as they drop 😂😂😆

Guessing this would be a bit small to handle a positive displacement system. Surprised to see this turbo charger style setup actually gain so much boost with the rpm increase, figured it would have hit it's ceiling much sooner :) Very interesting, nice work man!

7:20 There is too much volume in the tank. The SC can’t support it. You need a pressure referenced regulator.

Ardyno for the bench is the best solution, totally free

Congratulations!! I'm so glad you revisit the SuperCharger project. And very happy for you because you work is going well. I love you channel. And sorry if a make some mistake in the text. I don't speak English 😅

I like the way you took an instrument for heart rate measurement and turn it in a turbo pressure meter!

Imagine this engine sized up to like 50cc and put on those super small motorcycles, pocket rockets!

I like how he treats it like a tutorial even though no one out there has the skill and money to make it

Man all your video are so freaking awesome! You are amazing!!! I do recommend doing a draw through set up instead.

Amazing work! Waiting for the day I see this in a scale engine bay running!

I would love to see you do a miniature nitrous setup using the small nitrous oxide cylinders for whipped cream makers.

Powaaaaaa! -- Jeremy Clarkson

you might need to open up the exhaust side now so all that air coming in can get out just as quick once spent.. this is an amazing effort and i could watch you do this all day thankyou mate. great vid

Skill confidence check, much cnc experience check, loads of r/c engine play time, totally blown away when my man Johnny throws down a pro level gasket with his finger. Life skills advanced.LOL

I feel like this turbine just has to be choking, trying to move so much air. And with turbines increasing rpm doesn't move the choke line to the right as much as might be required if the size is way off.

Dyno testing is going to be fascinating

I think alot can be had focusing on the compressor wheel shape and size (much bigger). Amazing work as usual.

Impressive machining skills and programming.

Johnny, how about using compressed air at a couple or more of LBS to test the amount you actually want. then design the SC to get your optimum boost. Just saying Again Great Videos

Can't wait for the day your project to be successful and marketed worldwide as a viable mod.

Really glad to see this project moving forward! I personally thing a screw compressor would have been a better (easier?) method to try, but you can’t argue with these results!

i cant believe how good all this works your craftsmanship is so on point. i do think you will start too run in ignition timing issues, would help you with these types off air displacements would help with torque. i guess for now, you are just having fun with it and hp or torque isnt on the menu. i am hyped for the next video!

When i read a title my stupid brain read "psi" like "bar". I thought wow 0.6 bar is huge atchievment for something that small and homemade then i realized that it is 0.6 psi not bar. Still awasome work to make such precise thing work from scratch. I appreciate your content very much!

I was like wait why is there only 300 views then realised it was only just uploaded.

I can definitely tell that its working, I can hear the charger side and the motor, thats is pretty hype.

Many thanks for this video..It runs like a dream now!!

I never clicked faster

Помоги парню alpha mods Он живёт в Греции ( говорит по русски ) и было бы замечательно, если бы вы вместе сделали турбо проект ❤❤❤

The folks down at Toyan must really enjoy watching you make something better out of their products!

Unbelievably difficult to get any pressure out of a tiny centrifugal compressor. Congratulations, great work.

timing is everything. aswell overlap once we get into forced air. how much does the intake over run the exhaust

That sounds awsome, would fit 'Mad Max' style Interceptor really well.

This guy does great work I just wish he could post up a little more often I love watching all the stuff and I’ve been waiting for them to get that supercharger up and running for a while

Amazing as always! Keep it up!!!

Once you decide to switch over to a positive displacement charger, can you hook this one up to a high RPM brushless motor and spin the hell out of it just to see what kind of boost you can build at, say, 200krpm?

Someone is learning that you can't just slap a supercharger on an engine and expect it to work. You need to add fuel and even more importantly... TIMING!

You actually got some boost. NGL I'm impressed

This is so insanely cool I'm amazed

you should add another connection on the inlet to check actual boost pressure.

Maybe if you used the exhaust for your fuel pressure instead and didn’t have any intake leaks.

In my day, ( 1961 Apprenticed for SIX years Mechanical Engineering ) I could have made the inlet manifold BY HAND in a couple of hours, from a drawing, without using ANY machine tools. The site of CNC machines doing all the work, is not very pleasant to watch, whereas watching a craftsman with tools in his hands, is a very satisfying experience. Furthermore, the increase in volumetric efficiency of the engine is achieved by the use of a blower, but this means of increasing power is not as satisfactory as reducing the reciprocating masses, to increase RPM, and careful attention to the inlet tract flow passage, combustion chamber fluid dynamic calculations, and improvements to increase compression ratio, flame propagation pathways, and camshaft design to include the design of the plenum chamber, and valve overlap / flow design. Simply bolting on a geared up blower is something of a cop out, any fool that do that, with enough money and time.

The fuel pressure hose off of your charge pipe reminds me of those old school add on fuel controllers in turbo kits that would just add fuel pressure proportional to boost. Very clever.

Is it possible that the engine can’t exhaust the increased air input? Kinda sounds that way.

This needs to make atleast 1psi The engine would draw about that in vacuum alone.

Skipped to the last, too excited to see the roaring of beast!!!

I don’t know much about rc but I do know a good bit about motors in general n the sluggish throttle n bad response sounds like ur running it to lean bit I love ur content keep it up thank you

Have you thought about a twin screw supercharger design instead of the centrifugal?

Sounds like it could use more timing. Perhaps a ballon on the turbo to see how much volume your getting.

Felicitaciones otro excelente contenido esta vez con este Supercargador de 0,6 psi a 90.000 rpm en un motor MINI de 2 cilindros y cuatro tiempos, mis respetos y saludos desde Venezuela👍💯💯💯👍👍👍👍👊🙏

Glad I waited to the end before commenting... I was about to suggest you build a prony brake dyno to test them! ;-)

So now that you got a procharged monster is this going in the evo for some no preps?

Imagine if this works as a turbocharger like uses exaust instead of running through mechanical belt

My god. Thought id never see this done and working... Incredible. PLEASE throw this on a buggy... Would be so cool

I learn a lot about engine from u sir, thank you

Some thoughts: S/C inlet is too “edgy” - some round inlet should be added (like the opening of a trumpet) to improve inflow. Next intercooler can be added, to cool compressed air, furthermore how do you measure power increase? Reving without load is not a measure. (Ok just saw the comment in the end title). It could run slower, it with more torque and power...

Id say that thing needs quite a lot more rpm

Awesome and small Great video. Great sounding engine. Thank you for sharing.

Fantastic work as usual! To put things in perspective a C-1 Procharger spins at 80K rpm with a 4.25 inch exducer diameter. To get significant boost out of this one you will need dramatically higher rpm. 300K rpm and bronze journal bearings are kind of the starting point for a few psi for boost with this size impeller. Those deep groove bearings won’t cut it at those speeds.

damn half a pound per square inch! in that little thing! isn’t that like the equivalent of 10 psi in a small honda engine? correct me if im wrong, i do wanna know.

Is there any problems with turbo other than not enough exhaust pressure?

This is pretty cool, tiny engines are great to study for future modified cars like actual real cars.

Best Saturday morning to wake up early to.

8:00 Interesting. The belt is making a black line under it. Does the belt have a lifespan?

It looks like you need a gearbox on this supercharger... 😄

This is what the internet is for. As a child I always dreamed of turbo/supercharging a Rc car. This shit is great! Good job bro :D