It's not all about boost pressure, but instead about boost pressure at a given flow rate. Since this turbo is designed to feed a 14l engine it has to move a lot of volume. If you use a smaller turbo you will get the same pressure with much less power. Just pretend you are trying to feed a 2.8l engine. It would take 7 times less volume at a given rpm to achieve a given pressure.

Pump gasoline into the output stream for awesome flamethrower perhaps!

Great project! The water pour shot was really nice.

Ahh the old flabby arms in the breeze test of Turbo efficiency, nice....

I am amazed a nonlubricated shaft at 20k rpm didn't sieze shear and shred the compressor.

DO NOT mount the motors in the intake air stream! If anything comes unmounted, it will be sucked into your fan, destroying blades and/or your entire charger! I would tap off a bit of the outflow and rout it back to your motors. BTW: A turbocharger driven by an external motor is not a turbocharger, it is a supercharger :)

I’ve used brushless outrunners in a few RC projects over the years such as drones and they still impress me today with the amount of power they have for their size.

When dealing with DC circuits, most people would not have thought about eddy currents but of course they have to be considered because of the rise and fall created by the commutator. Happy to have found your channel!

This absolutely made my day

Next time some annoying neighbor is using their leaf blower, you can show them who's boss.

this is absolutely awesome, you can actually change the car modding and manufacturing scene FOREVER! if you are planning on launching something like a kickstarter count me in!

I'm super excited for part 2. I'd love to see this thing running at full RPM.

How are you not going to call this video, "Will it blow?"

Battery charger? I think you mean non-adjustable welder

YES! I've been waiting for YEARS for this to be actually done

I did the same thing to drive a cyclone I made as a shop vac. Worked great. Drove a fan blade off the back of the motor for cooling. Great video.

Nice leaf blower

Those bearings wont run long without oil

Very interesting. I'll admit, I was skeptical at first but you've done your homework and know what you're doing. Props to you for that. Subscribed and interested to see more

I like how much knowledge you have, lol I’m trying to make one of those electric superchargers. Preach on brother, preach on, you’ve got a new sub!

Isnt this basically a Electric supercharger? :D Anyways, cool experiment, keep this up. Really entertaining to watch.

When will you do a part 2?

This is like a cheat sheet for one of my current projects. Thanks :)

I've been waiting for someone to try this for the longest now

I think some of the points are a bit off, you're free flowing with a reduced nozzle and the result is some static pressure buildup in that cone, but the psi you're getting is less than it would probably make when attached to an intake since that would result in the air being forced in a confined space and therefore less flow. I would measure the maximum pressure you can achieve by choking down the exhaust (progressively until your motor can't keep up with the required power) and you'd also need to measure the flow at various boost levels - you can calculate how much an engine would flow at various rpms (displacement/2 x rpm) and cross reference your chart with that to find what boost you can actually produce, the more rpms on the engine the less boost you'll see but more flow.

Now you open a Patrion so we can donate you money. Then you take that money,buy a smart car and fit this shit inside.

Thank you , thank you O brother of mine. Thank you for all of those days and nights spent just in the mathematics alone. Sir , what ever drove you to take the time to put this out there , I thank :) Only because the way I think and process things . One 1/4 of your video just gave me a missing piece to my big puzzle . God bless bro see you on the flip side keep on keeping on!

I appreciate your content. Always super exciting! Double thumbs up from Denmark.

mount the air intake from the engine, it would be great if you added some meaningful covers to the intake

Well, either you're building one hell of a shop-vac, or I'm just completely thick when it comes to turbo chargers and electric motors... :P

awesome! honestly i’ve had the idea of an electric driven compressor for awhile just never had the tools to get started!

Slow motion water blow is supercool, very interesting to see. Congrats on the idea. Nicely done.

he's not dead!

1.7PSI at what air flow? you could get higher psi at lower flow, right? how much would engine at low RPM need? let's say small car or mower :)

Freaking Awesome. Keep tinkering!! Need to see more of this.

About 6months ago I told a friend who been a mechanic that this exact project would be nice.. He proceeded to explain why it was a dumb idea since I supposedly did not understand how a turbocharger worked.. Thanks man, you proved me right!! Maybe I'll try it in my next car :P

I hear it's a pretty good idea to power one of those with the waste heat from an engine exhaust.

Turbocharger is turbine driven supercharger You my friend made world's biggest electric supercharger well done and also will this fit in my Honda 👌

Amazing project!!! Really hoping to see another update!!! This is a similar project to what I want to do, and it’s very interesting to see one that actually produces a little boost!

More on this please, really interesting, as I love racing and messing around with stuff like this

That'll dry your hands quick fast in a hurry.

Super powered vacuum dermal?

extraordinary project ! I was looking hard for this kind of information. Thanks !

We did a direct drive coupling ET. The bigger the engine the bigger the gains. Love you belt drive, it quiet and good power figures. The best we got was 0.2 bar with 14volt from alternator and 100amps demand. Power gains was between 25% up to 40%. Torque figure not horse power. We ran out of air on the new mustang V8 engine so we increased the turbo compressor side with good result. Well done great project. Madi electric Turbo still in the game.

now do a simular setup using a motor on the cold side of the turbo to help pull exhaust out of the cylinders on a supercharged engine

I spy a 121GW!

An interesting and easy way to calculate copper loss and arrive at a close approximation of the mechanical power for that motor. I tend to do it in a more difficult way (calculate percentages and such) I learned something, thank you!

Im sure someone has said it before me, but this would be a good way to avoid turbo lag, especially for smaller everyday vehicles that can be tricky to drive for inexperienced drivers. If you added some sort of clutch mechanism perhaps you could even disconnect the electric motor once the engine produces enough exhaust gases to drive the turbo at sufficient speeds. This would give you a nice power curve and a really nice driving car Great project!

IIRC turbochargers have bearings designed to be always lubricated by a flow of engine oil, and they tend to get damaged rapidly if the engine fails to deliver proper oil pressure. Not sure how this relates to your build though.

Boost is a build up of pressure in the intake manifold. You are not measuring boost pressure.

Love the high-speed shot. I used to throw snowballs into the exhaust stream of an F-15 fighter on the engine run pad. Those were some powerful engines. The snowballs just disappeared. Good times.

This is the future. Brushless motors and motor speed controller are getting better and better every day. Only down side is where to mount a capacitor system that can supply enough power without straining the alternator and adding too much weight. And the motor speed controller would have to communicate with ECM that way the right amount of boost is added based on engine sensors, transmissions sensors ,abs, and stability control systems. This could be the future for combustion engines before full time electric vehicles take over completely. Good video man.

You could use some supercapacitors. The alternator charges them for 10-15 minutes and then you have 1-2 seconds of most awesome boost...

Pretty sure the equations of power, pressure and rpm are all very non linear and very dependant on the geometry of the turbo.

This type of thing is used in hyper cars and formula1 racing. It’s called something like a precharger or electronic boost assist. They use it to build boost before the exhaust output is enough to build boost off the engine.

love it, not sure what to do with it but I like it. keep up the good work. cheers Daniel

Make a jet engine, add a tube so the compressor blows down the middle, allow air to enter next to the nozzle, add fuel and flames If it doesn't hae the power to drive the car, it would be an awesome weed killer

Realistically to hit the full ~ 50 PSI @ ~ 1000 - 1200 CFM a turbocharger like that could push you would need about 170 - 200 HP which when scavenging energy off the high temp high volume exhaust of large 14 liter 400+ HP diesel is possible given the overall engine efficiency gains given by the added boost cancel out the added fuel and power consumption of pushing the exhaust against such a load.

I concluded with my mathematical mathmatics that it blows good

Dude! Great! Thatll make some mad instant spool since motors have instand torque!!

Your running it with oil right?

the shirt makes this so much better uwu would this make a better turbine than say a performance Ie sports turbocharger?

Oh man, this is getting really interesting now.

Freaking awesome man, keep it up!

121GW Review?

This could work better on a smaller turbo perhaps and with a high gear ratio

I love the mathematical equations. I'm hooked on your vids

I love everything you are doing .

Why don't you use gear ratios to get the rpm up

could use it to give air to a forge

I'm extremely fascinated by this :)

Very interesting and keen for episode 2. It may be worth stepping down the driven pulley a few teeth to increase the output RPM. Once you work out how you're going to run it, any ideas who you may power it when in the car? There is an electric supercharger on the market for BRZ/86 that runs on 24 volt (no actual boost pressure though from memory).

Slowmo of belt drive. Anyone?

This is very similar to how the current year Formula 1 engine turbochargers work. Mercedes has a nice visual of how they create theirs in this video: kzfaq.info/get/bejne/opiPmLd9qODDY30.html Glad to see you tinkering around and posting videos again!

Very well done! Place a ball valve at the end along with a pressure sensor and an air flow meter and make yourself a compressor map.

SICK! I eh...have some of the same spare parts...from a same abandoned project...and wondered about doing exactly this!

What the heck is lubricating the rotor bearings?

Its interesting to realize how inefficient even an "efficient" diesel engine is considering there is 200HP worth of waste energy in the exhaust to drive the turbine of this turbo! Imagine if we could harness 100% of the energy in a given amount of diesel fuel!

Neat! This has been on my list.

how much pressure could it generate and how loud is it? this just wonder if i could build an air compressor with a small turbo and a bl/dc motor wich runs much more quiet than the piston based compressors out there!

Maybe you should just mount a gasoline powered leaf blower in your truck with a 4inch piece of dryer outlet hose hooked up to your intake. All joking aside it would probably work better than ANY electronic blower.

Errr... engine power is NOT all about boost. Its mass air flow ;) A large turbo can make more power with less boost due to many other factors too such as a less restrictive exhaust housing etc..

yeah i'm also curious what type/brand of bearing you used since you've removed the oiling unit on the turbo.

Comgrats, you've invented the leaf blower.

No oil lines? Don't turbos use oil to cool lube them?

Awoo!

Impressive for sure !

This is good. Ever do a part 2? I've been thinking about doing something similar but maybe gearing it to the serpentine belt

And this is why I am single. 😟

Interesting how electric motors are constantly the end goal. That turbo engine will get smoked by electric cars that don't need a turbo .Last 100 years "we'll just use an electric motor to start the engine, another spinning to generate power, clear the windshield (and some headlights) some in the doors, antenna, mirrors, seats, climate control, headlights that blink, and doors that close themselves, ..."

Can't wait to see where you end up taking this

Awesome Project. I had the same idea. Im really Looking Forward to this^^

I do not agree with you with regards to all electric turbochargers are useless, dude THOSE THINGS ARE USED IN NEW AUDIS, it gets the turbos to rpm quick with extra power eliminating turbo lag almost completely everywhere! Back to your stuff, calibrating a fan is a precise exercise, you are turning the biggest fkin turbo I have ever seen, compared to that the motor u are using is tiny... That is wrong an inefficient for many reasons, for one with an electric supercharger you want your fan to get to full rpm as fast as possible to properly calibrate the injector and turning that is hard to do with a rediculus turbine designed to charge 14liters with enough compressed air for up to 4k rpm with air in a heavy hauler, well thats a lot of fkin air. The problem multiplies coz these kind of truck turbos are really only effective and efficient in a narrow rpm range and your 6kw motor is not even close to achieving that or even 5% of that. Rpm numbers together with power draw would also differ a lot from your measurements and boost amount would change too much in a wide range with your "setup", now add to that the slow fan speedup and with these characteristics calibrating the injector would become hard to say the least or even impossible, if you could succeed to make it work somehow what you would achieve proly is a huge turbolag that is always present. Fans are designed for specific power and rpm to be efficient and so achieving higher boost than your demonstrated setup did at 6kw would be most likely doable maybe with a quality 70mm fan even at around 2kw and easily surpassed by a quality! 90mm fan with high blade count paired with the right 4kw+ motor. for such a purpose the motor is preferable that has higher kv for the fan slightly so it only reaches optimum rpm when the engine intake is sucking properly at full throttle with steady vacuum and that way boost levels could be managed on the "top end" and at the lower end or with light loads it also could be managed with a fast early spinup to a boost level that is gradually decreasing as the engine's rpm rises at full throttle . I'm planning a mod like this for a while now, will be using a bike engine around 800cc with a 70mm ducted setup, a generator that is around 2.5kw for the 2kw-ish fan, all calibrated with "power commander 5". My engineer friend made some educated guesses and he said I could possibly get +20-30% max power and more at lower rpms, it is possible that even the combustion chamber needs to be slightly larger just like when putting on a real turbo only not by that much. It got a little long but I hope this helps you make a decision as to how to proceed, actually using your motor together with that huge turbo could be made to work on a smaller engine I think, more or less like it does in the new audis but only if it was an exhaust driven full turbo at the same time. Cheers from Hungary and good luck!!!

Cant wait to see the dual motor setup this was very interesting though.

Nice! Do you think a leaf blower would make an effective pre-stage for this, or would it not make much difference?

Excellent video I enjoyed it very much Thank You

All the T-50 variants use hydrostatic bearings which require oil at about 50 PSI to prevent the journal from contacting the bearing and wearing. Additionally, turbocharger rotating assemblies generate thrust forces due to secondary flows of boost and exhaust behind their respective impellers. These thrust loads largely compensate for each other, but in the absence of a turbine, the hot side thrust face will see higher loading than normal. The T-50s have GIANT single piece bearing assemblies, so they can take a lot of abuse, but if you decide to test at higher speeds, oil will become necessary. Rock on!

Very cool! I was really wondering whether we’d get to see how much magic smoke your ESC contains, lol. As with most things they are over-rated or only rated under very specific conditions as far as the number of motor poles, RPM, amount of time permitted, and load on the motor. I’ve seen way too many ESCs catch fire, and suddenly your wires are red-hot when the MOSFETs short out.

Wow this really "Blew me away"!

Thank you for the idea I just got.