Functional Electric Supercharger: Design, Fab, Test.

Read more about the system at our website here:
www.arcsuperch...
Update logging the design of a custom designed electric supercharger. While the internet is flooded with "electric superchargers" that do little more that spin a bilge fan, I believe that I've invented a solution that offers some potential usefulness. Next steps are to install it on a newer vehicle (E90 BMW, likely) and try for some quantitive dyno runs! For reference the vehicle in the video is a 1987 Mercedes Benz 300E that being worked on for an upcoming 24hr of LeMons race.
Reddit Article Here: / functional_electric_su...

[@TheLordMaximo]

finally someone showing how much CFM these turbos can bring relaive to pression nice job!

[@Make-Asylums-Great-Again]

Centrifugal blower not a turbo

[@TheLordMaximo]

@@Make-Asylums-Great-Again A eletrical centrifugal blower indeed lol

[@4226oak]

It seems it would be an extremely efficient form of boosting a car, it can be independently controlled to create whatever boost at whatever rpm you wanted. I want to see a bigger one ☝️

[@jeepwk6.5L]

Problem is.. it isn’t efficient

[@bingbong7206]

Would not be efficient at all. Turbo's are efficient because they scavange exhaust gas. On top of that, you're converting mechanical energy to chemical to electrical just to boost the car

[@ericcampbell2360]

I'm so excited to see electric superchargers become a thing!

[@frostyworgz]

they have been a thing for over 5 years where have you been?

[@ignasanchezl]

Those are not superchargers even, they barely are hair dryers, this one works.

[@clubdredd1337]

My father designed this 10 years ago. I still have all the prototypes, 2blade 3 blade ets oe design. housings charge pipe design. Platform was a 1989 Mercedes turbo wagon 300!

[@dan8t669]

and many before him, but it's just not practical

[@lyhanenidhamu6415]

Hello

[@jaybringus6818]

This is a step in an AWESOME direction. Great concept and would be much easier to install than an entire turbo system. Something like this could be perfected soon. I’m waiting for that day. Put it on a naturally aspirated V8 with a good amount of horsepower like a lexus GS with VVT or a mustang GT.

[@critterIMHO]

The more I think about this, the more I like it. An electric supercharger would provide constant air flow which means the boost would taper off as RPMs increase. I am thinking a stock, or near stock fuel system might be adequate. And the power should feel very linear since you would be using nearly as much fuel and air at 3000 RPM’s as at 6000 RPMs.

[@420techdeckpro]

Yes let's run our engine with a very lean mixture all the time, sounds like a great idea!

[@my1little2pony]

@@420techdeckpro go have another bowl full and re think your statement a computer controlled car will alter the fuel mixture to not run lean as long as you don't over run your injectors. I'd be more worried about timing.

[@fabianrudzewski9027]

Very cool project. Well done! May I ask, what kV and voltage you are running at and how large your turbine is? I see you are using one of the large inrunner Brushless motors intended for rc boats, have you hooked up the water cooling? And have you mounted the turbine directly to the motor shaft? Maybe you should try and use this one in conjunction with a traditional turbo, like Audi does. That way, your compressor only has to boost the engine for a short time, until it produces enough exhaust gases to spool up the normal turbo. This will save you lots of energy and you can use your compressor on larger cars too. Look up the Audi SQ7, maybe you can get some inspiration from it.

[@whoseverpanic3160]

Run this with a traditional Turbo and you will have some insane gains, love it

[@rayron12345]

omg love that w124 E class!!!!

[@worldwidesports4k]

I had a w 124 Benz and I love it rode like a dream.

[@XPbIM3]

So much hi tech and an old mercedes ke jetronic! Niceeeeee))

[@christophermarshall5765]

Only TWO types of jetronic fuel systems were used by Mercedes, & NONE have "E" in them.

[@jukkaleppanen2071]

Audi use KE-Jetronic too...example: Audi 80, 90,100 2.3E mitor which is 134hp. This is true, because i have one Audi 100 2.3E automatic years model 1992 and it is my daily driven. Only 313000 km on the clock

[@ChaotiX1]

I'm waiting for the MCM fans to come out of the woodworks and school us all on Electric Superchargers

[@Grimdopple]

ChaotiX theres a pretty large difference between a 50watt eBay electric turbo charger and a 2 kilowatt one

[@ChaotiX1]

oh I know there is, but they dont

[@scratchresistant]

Who is "they", I like MCM and I understand the difference. Or was this just a sweeping generalization so you can make a jab at a channel you don't like?

[@ellenorbjornsdottir1166]

They could technically work. I'm an MCM fan.

[@TheJoyriderDub]

Like Roger said, since it's bigger it might give you some tiny amount of boost but it would never be able to spin as fast as a normal turbo (i don't think)

[@bigsmoke9935]

Can think of this as a way to overcome turbo lag

[@jamesandonian7829]

"More to come" its been 11 months dude

[@RabeaHussain]

2 years now, still , torque amp is doing well now if these guys do it for less than 1000$ i would buy it ,, phantom supercharger is around 2k torque amp at 2500usd

[@TheFurious74]

@@RabeaHussain 3 years.. Still nothing!

[@frenkie6446]

@@TheFurious74 lol

[@glizzyglizzy9423]

@@TheFurious74 Almost 4

[@RufusBuck5]

And here its March 17th 2021 and still nothing lol

[@landonsamiano8717]

could you put the electric motor on a regular turbo? use the electric motor to reduce/eliminate lag and have a clutch system to disengage the motor and allow the turbine to work normally once up to speed. i know it may not be what you're going after, but its just a thought.

[@doc.voltold4232]

Landon Samiano they use that on F1 cars. it is an hybrid turbo

[@markloats5182]

The f1 turbo is even more advanced than that, it keeps the turbine constantly spun up and they have done away with the waste gate so when it would normally over boost it uses the turbine to charge the battery pack.

[@sergecampeau3610]

Forget about the clutch. Will not survive this kind of speed. Not required anyway.

[@MrDannyd9]

have you considered the parasitic draw the alternator will make with the extra current flow?

[@bigsalo8598]

Awesome! I'm also working on one and came by this video, happy to see that my idea isin't impossibile seeing as someone else also thought of it and is further than me in the deisign

[@randuzy1]

I have a supercharged Volkswagen Corrado G60 I wonder if this toy would help blow on my intercooler while I'm sitting at traffic lights to stop the heat soak

[@emre2blue]

Please, put some boost gauge in the car, near RPM and we can see how much boost this can produce in real test. And for the power need. Also Please show us how much power does it need to make the boost ?

[@arcsuperchargers9407]

We plan to perform more scientific tests such as you describe. Ideally, we'll install the system in a less tired vehicle and record a whole suite of data points in various scenarios.

[@seangeeb]

ARC Superchargers as I was watching this I was thinking "I would loveeee to see dyno results" lol.. Food for thought..

[@jaybringus6818]

They show the boost gauge at the beginning, they’ve also stated it makes about 7PSI

[@kramrle]

Jay Bringus How much is 7 PSi in metric units?

[@kanniaalio94]

Martin Leutwyler it's around 0,5 bar

[@chiefdenis]

yeah i have this exact mercedes 300e with the 103 i6, it pulls exactly like this foot down, i'm not convinced unless i see some numbers. That engine sounds awesome tho

[@sportsmansparadice42]

Chief Denis Yeah I have a 1992 300E 2.6 liter, and i would agree lets see some dyno numbers.

[@joseplayer2144]

Chief Denis sounds so much more complicated 😫 anti lag bro

[@timschutte8310]

, great idea, hope it works. love to have a plug and play model for my truck.

[@vladnickul]

A 1.6 liter engine uses 168cfm @ 7000rpm so ruffly you will get a boost of 0.4bar , not to bad for a DIY and a toy brushless :) I imagine that 3d printed part leaks like hell tho :D. Use a dc to dc convertor to power up the turbo from the alternator, keep it all the time running to get boost. install a waste gate to regulate the boost and go from there.I think you will need to keep it at a constant 2-3k rmp for a limited boost lag . Nice project!

[@jamesbower330]

i made one about 10 years ago same concept but i used a Garrett t3 compressor housing. ill try and post a photo of it

[@peucaue]

Did you have any results from it?

[@fionnan2811happy]

Good idea in theory. Not criticising the idea or the work. Ive seen loads of these and the air intake manifold is neglected if the compressor wheel happened to break apart due to bearing failure especially if it's a ball bearing set up.

[@mcf3778]

The look on his face is all the proof i need!

[@Make-Asylums-Great-Again]

Gullible much?

[@mikewallace8087]

Testing in a curvy road industrial park , geez how exciting .

[@retromotorsports3207]

If you guys want to test it on a newer vehicle I would surely do it and make you a nice video on my 2011 hyundai genesis!

[@jesussavescars807]

We're are the new videos I need to see more now like today

[@davidmeagher4909]

Looks awesome 😎 Can’t wait to see how it all turns out 👍

[@brodydariel5388]

InstaBlaster.

[@dylanmorin2534]

i bet it works but only at low rpm where the air flow requirements are alot lower. the electric motor doesnt increase rpm at the same rate as engine does so boost would fall off quickly

[@scottquattro4685]

Audi are using a similar concept on the new electric turbos in the RS7 so there could be something in this for people on a budget

[@frankgonzalez24]

The hair dryer in this video is no where near what Audi is using. The electric motor Audi uses for it's turbo uses a generator to charge a 48 volt battery. The 48 volt battery than powers the electric supercharger.

[@xsixinfantryx]

What they are making vs what Audi is working on is like a model rocket vs NASA lol

[@xsixinfantryx]

What Audi is working on is kinda more for eliminating turbo lag. The engine still has two (the one I saw) conventional turbos running off the exhaust. What they are making is something that just makes a short "burst" of boost kinda like a capacitor to fill the gap between hitting gas pedal and building boost from exhaust. It's unable to actually sustain boost but it can help with lag. That's how I understand it any. I could be wrong

[@ivkuasenov]

beautiful sound

[@MaDcOw1986]

electric superchargers have been in the market for quite a while now, but dyno shows it does not add power.. in the video, it showed that the blower, can put up some good pressure, but that does not mean it can move a good amount of volume of air more than what the engine can suck in while in full throttle at peak rpm.

[@09fatbobmike]

I currently have a V3-SI blower on my charger and doesnt make boost til 3grand. I was kicking around the idea of getting an electric blower for the low rpm only.

[@benburton3496]

run it on super caps bank. That turbo was design to operate at 70,000 to 100,000 rpm that motor won't make the horsepower required to drive it under full flow load and produce 10psi of pressure. Testing the pressure with the end capped off with the boost guage attach isn't a true indication of flow rate required while maintaining 10psi pressure into a full open motor throttle, 6 cycliner 3L. A super charged 600hp engine needs approx 100hp to spin the blower to make more power and overcome the initial 100hp load on the engine to run it. You need a whopping powerful brushless motor to get even close to the flow required. But it is possible

[@vladnickul]

Saying aaaaah makes it fast?:))

[@luigiangeloquigao7556]

saying aaahhh says its works

[@Driftcentralhub]

Hows the progress going? This in my mind would blow up (sales wise) if people learned about them more. This would be an amazing aftermarket forced induction option for people. Adjustable boost withing a split second disregarding engine rpm. Both superchargers and turbochargers spin faster based off of rpm. An electric supercharger would spin faster based on the controlled amount of current running to the electric motor on it. Fucking amazing idea.

[@Gamleprofil]

Not believing it until i see dyno... Would be amazing if actually works tho! But for an electric one to replace traditional turbo, it will drain the battery in seconds

[@dontrustwhiteyevery1]

Not if you have different battery supply.

[@Gamleprofil]

@@dontrustwhiteyevery1 yes, that could be a solution for sure, but it would not be cheap to get such a high powered PSU, at least not cheaper than a traditional turbo.

[@rc2300s2r]

I think this would be good for BIG turbo cars. Use this as a hybrid to reduce lag. Then let the big dog eat!!!

[@marywhore1]

I need one for my 84 Chevy RV

[@robertmartinez696]

Problem is loss of boost by fan once boost builds in engine...it will suck from here to kingdom come but once boost builds it will slow the fan down

[@Kyle-jb3hr]

Cool concept but I just don't see it being a competitor with exhaust and belt driven chargers

[@paulcherry1520]

I love this idea I want one when you guys produce them from sure

[@golgothapro]

I took a different approach. I used a 72vdc 250A Me 0913 BLDC to drive a Paxton Novi 2000 with a 2" 8mm belt drive at about 1:3.3 and put it in front of a .60 over 350ci. Static is 8 psi, but running it starts at 5 psi and is gone by red-line which is OK because I'm going to shift then anyway. With BLDC motors electric super-charging is definitely feasible but the trade-off is battery weight. My system would boost the hell out of a 2.0L but between the six lead-acids and the unit itself it's about 300 lbs; but of course additional weight doesn't make near as much difference when you're already on a roll. Most people underestimate just how much hp it takes to make boost above and beyond what the engine is capable of gulping down. A Hellcat blower for instance takes 65 hp off the crank to dive it at the factory 8 psi. What I would like to try next is eight off-the-shelf BLDC compressors on induction stacks, but that wouldn't be a cheap build. The one advantage of centrifugal blowers over roots is that they can be naturally aspirated through when at rest. It's definitely something that's going to catch on. Everybody that ever saw Mad Max has got the F-ing bug and it ain't never going to just go away.

[@golgothapro]

@Timbo Slice That sounds crazy but it makes sense to me because one is designed to move a lot of air and the other to compress it. I think much the same could be accomplished with a 1000 Watt bldc motor-drive off Ebay for about $50 and an alternator wired as a bldc motor; but I think it would require some kind of an inverted planetary to get the necessary compressor impeller speed.

[@gopetogeorgiev3609]

Lol now thats interesting, thumbs up and good luck on the market

[@rasec1889]

I want this!! I need to buy it

[@thestateofreal2533]

What would be smarter than the engine alternator recharging the batteries would be using the exhaust gases and an impeller to recharge the batteries.

[@s1beri4n]

but then you are adding in the issue these guys avoid, adding another restriction to exhaust flow. Granted Ford has already tested a system of dual turbo charging wherein the electric turbo covers the lower rev range and the exhaust driven turbo takes over in the higher range to avoid turbo lag and give a liner power band. So it probably could work but not as well as a twin-charged setup.

[@jasonw9431]

I'd be interested in this for my Ford diesel pickup.

[@wesleyd.7433]

Looks like a cool concept experiment guys. Fk any of these "can't, won't, doesn't" pro-knowitalls trying to belittle your experiment/results. Looks like you're on the right track to something useful. Suggestions: cold air intake, ecu tuning, large cap for motor surge?, non-engine bay motor mount, variable elec rpm output synced to engine speed/need. Not telling you what to do here, just suggesting. Would like to see future progress.

[@Zohar-Modifier]

The housing of typical turbo inlet turbine should be change , the turbine itself doesn't need to be metal anymore ... super light weight and heat resisting , constant cold air .

[@dadinggo]

Sweet, looks fun

[@hekkenschutz]

them why not put a leafblower on the intake?

[@ignasanchezl]

Leafblowers produce no pressure.

[@roberttaylor8918]

Watch Roadkill it's been done. And yes it makes boost. Just need more five leaf blowers

[@Rompastompa71]

Great job! *uck all those haters out there. I believe in the future.

[@lucacavallini561]

My apologize, but this turbo put more air, i think that in the original turbo system, there Is something that put more gasoline when the turbo run(?)

[@ArtisanYT]

Dood it's been 3 years

[@roboman2444]

Ah yes, the aquastar watercooled bldc motor from hobbyking. Good stuff.

[@dnlhitchcock]

Let's see some more action.

[@user-ye3jy9vv6g]

Wow ♧ Great job.

[@pzpinkslip123]

will this fit my Tesla

[@wasim486]

Yes, it will hold it from rolling back at an uphill light. Downhill it will run over a pedestrian. ⚖

[@MrRasZee]

y0u c0uld use it t0 bl0w air int0 the cabin

[@pzpinkslip123]

@@BeefinTahko why it's electric?

[@ATF.California]

You can use it as a blow dryer

[@Darsanthemuffinman]

Ask your self this question something that doesn’t take yeah it will work

[@ignasanchezl]

Is that an Aquacraft motor? This is cool I had this idea once, tho the compressor was to be used in an "electrojet" in which air gets compressed by the electric motor and then fuel is injected into this high pressure combustion chamber, to produce thrust.

[@valeriybeleychuk823]

3.0 l Natuaraly aspirated engine at 6000rpm will make 3000 intake sicles which means that it will swallow 3000×3=9000lpm=317cfm, if you want to boost the engine you need this echarger to produce 50% above the mentioned number(at least) if somebosy able to make such echarger and then dyno prove it he will finish the age of turbochaegers and become very rich man

[@crazeguy26]

Valeriy Beleychuk it may work better on a smaller engine. Like a1.8l or the GEO 1.0l

[@sergecampeau3610]

False. You don't need 50% extra. You need the correct amount for the power you want. It's not mandatory to boost up to 6000 rpm, you can increase the torque significantly at 3000 -4000 rpm and get only 10% increase at 6000, this is still significant. That's a fact that electric superchargers will replace soon aftermarket turbos on the street, but it's still cheaper for a car company to provide a turbo on a conventionnal production car. On a race track where you have the pedal to the floor 50% of the time a pure ESC cannot work, you need something else, regular turbo or hybrid like in F1.

[@valeriybeleychuk823]

Serge Campeau at 4000rpm 3.0l naturally aspirated engine with VE 100% will make 2000 intake cycles and consume 2000×3.0l=6000lpm=211.9CFM. From the graph wich was provided in video at 300cfm wich compressor can produce it will make preassure of only 3PSI , it wouldnt be a significant increase in power and if we go to higher rpm it would be decrease in power, maybe this compressor will work on smaller engine but not on 3.0l engine. To make echarger able to boost big engines you need higher voltage

[@sergecampeau3610]

Yes maybe it's too small for a 3L, but who cares about a 3L. Most production cars outside the US are 4 cyl below 2.5 L. It would still work well on a Mazda 3 2.5 L or a 2L. Furthermore, it might be possible to chose a better compressor wheel and volute for a higher CFM but that was probably not their goal. Their voltage is already high enough in my opinion, more current is still possible if needed. A real car company with big R&D budget will also design new compressor wheels from scratch in order to be more efficient at this kind of speed (80 000 rpm) instead of using an existing wheel that is supposed to operate around 180 000 rpm. I have made my own research on this and it's not possible to be close to the most efficient spot with existing components.

[@magnumopus9058]

Valeriy Beleychuk can you do the math behind 4 cylinder 1.6l motors its the most common in my country and if you could explain how do you get this numbers it would be great for me

[@cesarjorgemurillobarientos1813]

very good

[@wadestiller8346]

Hmm, maybe my calculations are off but I thought a 3.0L engine flows about 300cfm in NA form at around 5500rpm? So looking at that flow graph, you'll be lucky to make any boost at all up high in the rev range. I am an advocate for electric s.chargers but for this application you'd need more compressor rpm to get any decent boost into the intake.

[@wrenchracerepeatawayoflife2060]

Only flows 300 cfm? It would be okay on a mini bike or something.

[@kevinlonican2979]

WRENCH RACE REPEAT a way of life 300 cfm.. Sounds like the best air compressor motor I've ever heard of.. Sip and Clarke will be knocking on the door soon enough.. 😋

[@frigglebiscuit7484]

cfm and boost, along with turbo size have to be taken in consideration. a carburetor can flow 300cfm, but make no boost. think about that.

[@ericpatterson1414]

True that....

[@EweToobUsername]

8000 rpm motor and a 12:1 gearing between the turbine and motor, and this might get the proper amount of air in to make a tangible power gain.

[@hectortrejo1198]

ummmm ... needs some tweaks .. with the k&n filter it sounded weak ... like lightly going thru .. you want that violent sound... for an intake upgrade .. you basically made a leaf blower type thingy ... in the end youll need a kit and more parts

[@hillbobaggins]

GOOSE IT!

[@alexanders860]

Will this fit my lawn mover?

[@valeriybeleychuk823]

By the way it would be good idea to make twin e -turbo

[@rasec1889]

I want one!!

[@MPIronmanJC]

Would be great, but airflow is not high enough to be useful for most engines. 5-6 liter is pretty common (for anything other than a small car) @ 5000rpm uses at least 450cfm.

[@TheOVETSSTEVO]

I'd try a gear driven turbine to up the rpm some more... the brushless motor and lipo's are nice, but it would eat thru batteries

[@Brock_Landers]

But this is an actual good design with quality built components by people that aren't just looking to push out a plastic part to sell to idiots that think they are going to make more power with something that will eventually explode into their intake tract and send plastic shards into the combustion chambers. This is a well designed, well thought out supercharger built with quality components.

[@keisuketakahashi3597]

Please let me know what type of motor is used

[@johnclaibarros5229]

mas a turbina manda pressão e retira o compreensão para o escap no mesmo tempo , essa so manda pressão

[@pauls5745]

so am I right in assuming it can't even flow 600cfm? by the graph, seeing how it drops way off even at 300cfm, pressure above that won't even be above atmospheric.

[@royyang89]

That's awesome!!

[@nicksargent8851]

Dose the eco affect the electrics on the car at all? I would worry about the map sensor. also on your sight I don't see pricing.. have you pit this to market?

[@Toazt42o]

Will this fit my honda.... ruckus?! Recently wondering if an electric turbo/super charger would be possible for 150cc or smaller motors. Just not sure if the extra weight will overcome the added power

[@thumbgas888]

I want this on my crz

[@redtomatoes9719]

Works great on lawnmowers.

[@bloodswettears234]

Good job!

[@michaelreeves5487]

May I ask did you wire this to throttle body or TPS so that it builds boost when on throttle ?

[@RCFever]

wow, that's my idea as well, so I can really make one of them myself..thanks for this video confirming my idea...

[@thegiantgaming7592]

I dont get why you would not want to use the waste exhaust gasses like any "normal" turbo, as its way more efficient anyways

[@Redbull6a13]

the Audi SQ7 TDI has something like this at stock! it works with high voltage

[@CarLoverPhotography]

This is dope. Its possible for an electric motor to hit the rpm needed for a compressor to make boost if it doesn't draw from the battery

[@ignasanchezl]

Completely removes turbo lag.

[@04foxxsake]

The motor they are using is a hobby grade rc one. It maxes out at 30,000rpm, so it won't work well as is. Better motor and they may have something.

[@marcbirchley2418]

Even if this works... which I doubt it would, has nobody thought about what this would do to the internals? Normally Aspirated use high compression, if boost is added in whatever form except for liquid, you need to convert, i;e swap out the internals for low compression.... Right?

[@kurrono]

How many volts u adding to that ...48 volts?... 12 volts is not enough to boost

[@welileboysie1587]

if you install this electrical turbo. do you need to upgrade the cars ECU too? i have a 1.6L with 77KW 155NM. what gain will i be getting when i run the electrical turbo?

[@stavyone]

Welile Boysie Welile Boysie if your making 77kw at the flywheel with this junk you will make about 70 kW you will loose 7kw and the car will sound like a leaf blower ! These do not work as they do not work with engine rpm and cause a restriction ! People selling these things should be locked up for deceiving the public ! If you want save money and put a tiny little turbo on it and you will make power !

[@mtmasteroftalk5044]

How can you get that 3 phases motor?

[@Tonka470]

please please please make one for miatas

[@MatHelm]

Wouldn't you do better to replace the alternator (and starter) with an motor/generator to add power directly to the crank at WOT.....

[@deanlarkins5858]

Well.were waiting.......

[@MrHBSoftware]

people are talking about how an electrical device can run in a car without using the engines power but alternators are 50% efficient only so for each 500w of current you draw from the cars electrical system you are loosing 1000w from the engine...because YES the alternator does not generate free electricity, it spins freely when under zero load but once it starts charging it offers high resistance to rotation due to magnetic forces inside and it "steals" power from the engine....and the higher the demand for current, the harder it is to spin it...now add the inefficiency of an electric motor then add losses of transforming movement-rotation of a turbine into airflow and you get a very higly inefficient turbo...maybe its good for a toy but its no replacement for a real turbo

[@mogoestoamerica]

No video on KZbin how to install it

[@Frimen3]

Hello! I'm implementing a similar project now. Did you already try to install your compressor in a car and measure the real boost?

[@buggerlugz6753]

Reminds me of roadkill strapping leaf blowers to a V8. In reality, its a myth and it isn't going to work. If the electric turbo could produce a solid 20psi it'd be worthwhile, but the weight of the batteries would off-set the benefit.

[@dennisford2000]

Would pressurize the crankcase

[@lazar2175]

Send me one,i will put it on my Suzuki Maruti with 0.8l engine and ~40ish hp. Its alredy ment to go to scrapyard because it has rust so if it blows up its no big deal. You guys get all video rights and i get E-Supercharged Suzuki Maruti. Might be able to put it on dyno too.

[@gavinmcvey7682]

Where can a buy one like that cool job boys