Why Fuel Injectors are AWESOME (28,000 fps Slow Mo) Part 1 - Smarter Every Day 281

[@smartereveryday]

3 Links to know about: 1. www.patreon.com/smartereveryday You'll notice it's 100% supported by Patrons on Patreon. I'm grateful for that support and do not take it for granted! If you're interested in supporting on Patreon, here's a link! 2. www.crosscreektractor.com/ Give them a call and if Jacob answers the phone tell him his hair is too long. 3. www.smartereveryday.com/email-list - I send every new video out in an email! I won't spam you. Seriously, thanks to everyone who supports on Patreon. It's a big deal and I'm genuinely grateful.

[@troseberry91585]

The slow motion of the single port injector reminds me of fire breathers. They're doing the same basic thing, spraying the fuel until it atomizes enough to get to the right fuel/air mixture and ignites.

[@mixedpickles9201]

i hope you plan on making another video on the different type of fuel injectors… like from the books you showed us, how diesel compression was different than others.

[@RustyShackleford_]

I just want to say thank you, Destin, and everyone who supports this channel financially. I don't have the extra money to help out, but the attention to extraneous detail is very much appreciated in a world that seems increasingly like everything is turning to easily digestible, CliffsNotes-style explanations. From the topics themselves, to Destin going to farms and such and getting his hands dirty to give us simulated hands-on experience, to the videos of the complexities of the space flight equipment that I'll never use, lol, this channel is a shining city upon a hill. Keep up the great work, and good luck!

[@username34159265]

Re: #3 - I'm subscribed, but somehow the KZbin algorithm changed my notifications from "all" to "personalized" and I didn't get an alert for this video. Fortunately, the email list came through!

[@BBRandom]

Maybe your hair is too short. :P

[@ThatDudeinBlue]

It's so hard to explain how fuel is delivered to a vehicle if somebody has never seen it actually happen. This is literally the best showcase of how fuel injectors work. Amazing job. as always!

[@caterpillarslim1288]

It's even harder to explain HEUI injection

[@Phrew]

@@caterpillarslim1288 why is it hard? It‘s just an electromagnetic valve.

[@bmxscape]

@@Phrew its even harder to explain how a 2 stroke engines bottom end is lubricated... they use the fuel to lubricate the bearings lol

[@BKetch]

I love when I see other KZbinrs that I watch comment on other videos I watch.

[@GD-mg6pk]

@@Phrew c’mon, that’s a little misleading. I mean there is more to the system and its function than a solenoid, right?

[@yinglish119]

Thank you Dean for supporting the right to repair and help keep old stuff running.

[@f.k.b.16]

I was thinking the exact same thing

[@shawnpa]

Quality after market parts are so needed. 💯

[@joejoe6023]

What an awesome way to make a living !

[@michaelmurray11189]

DIY Mechanic’s Matter!

[@brendandor]

Something most people can get behind whatever their politics.

[@TimeBucks]

I adore you and your work so much

[@politics.123]

Nice

[@sunnyrajput400]

Nice

[@musafirbillal]

darun

[@haqeqat7217]

nice

[@anamparveen7336]

Nice

[@mrgeorgejetson]

The thing I think people are most attracted to in all of your videos is the fact that you've managed to retain your sense wonder and excitement into your middle age. It's quite infectious, in the best way, and I've tried to do the same thing, myself. Your son is a luck young guy to have a father who is so enthused by things like carburetors and fuel injectors (and the refractive qualities of water, and pneumatically-propelled baseballs, and so on and so on).

[@ElizabethSwims]

I love how your accent saturation changes depending on when you are narrating vs talking to people. Do you have a saturation dial you turn to adjust how southern you sound. I love it.

[@kyleeverly9243]

Linguists call this code switching in case you want to learn more about it :)

[@ElizabethSwims]

@@kyleeverly9243 I find myself doing this when I visit home state. Or when I meet people from my neck of the woods.

[@ironhorse3497]

@@ElizabethSwims Me too. Weird, right? I come back and everybody asks me why i'm talking like a redneck lol.. I don't do it on purpose. Just seems to happen.

[@javannapoli2018]

My friend has a really strong code switch when he talks to his family. We live in Australia but he was born in England and his family moved here when he was young. He has an Australian accent normally but anytime he speaks to his family he instantly swaps to a strong English accent, it's pretty funny.

[@firekrave1]

@@ElizabethSwims same.

[@yutanashi2809]

That slow motion video of the flame moving towards the camera was insane. Really mesmerizing

[@ChemEDan]

POV - joint at a hippy festival

[@micahphilson]

I love how Destin goes from nuclear submarines to tractor parts to apollo mission technology to tractor pulls to the incredibly wide myriad of subjects on his popular videos list. This guy is just a grown up curious little kid who gets to explore all of his dreams and take us along for the ride!

[@duckyman1755]

great summary of his channel

[@tzkelley]

I hope his new manufacturing business has something to do with rockets!

[@parapapapa69]

And I knew anything about any of those things neither even "care" about that much and yet... here I am devouring videos. Destin is gold !

[@mickeyfilmer5551]

His dad was one of the Saturn 5 engineers... what do you expect? he is a genius.

[@matthewellisor5835]

@@mickeyfilmer5551 And all the way up to JWST.

[@victoraunon6417]

I have a PhD in internal combustion engines. I can only say that I love how you approach a subject from its basis. You are an eager experimentalist and the passion you show in your content is inspiring and contagious

[@gregsilva1230]

get your money back, none of those injectors fired correctly.

[@MrBobbo18]

Where did you get it? You’re an engineer? I’ve never heard of getting a phd in engines.

[@markverhoeven7518]

🔫

[@corataylor2205]

"PhD in internal combustion engines" doesn't even sound real.

[@TRak598]

I may be wrong, but getting a PhD is about presenting a thesis, not about being part of the research team of a well-stablished initiative or aiding someone in presenting theirs; And if that's the case, you can be a PhD in anything so long as your thesis is accepted.

[@AntVenom]

Well, today I learned some of the fundamentals of fuel injection. Also, I was not expecting those finale slo-mo's to be as extraordinary as they were.

[@supertornadogun1690]

Most random antvenom spotting

[@danbjuliano626]

Wow its AntVenom, its feels like a cool crossover

[@3dprintworld503]

that's litterally how ww1 flame throwers work. You don't actually get burned by the fire, you get burned by the burning fuel that squirts out like a water gun.

[@whopperlover1772]

@@supertornadogun1690 fr lmao

[@Sageofthe16]

today you watched a guy burn some fuel.

[@MinistryOfMagic_DoM]

Destin, you inspired me to become an engineer. Years ago when I was fresh out of the military you were kind enough to correspond with me via email about various photography techniques. I now work in aviation engineering. Along that trail to get to where I am today I worked as an automotive mechanic and I have a lot of these tools and a curious mind. It's very difficult to convince myself to be responsible and not try this at home 😂. Thank you for always staying curious and helping to inspire more people to be as well. I promise I probably won't try this at home. Maybe at work though.

[@anon_y_mousse]

Yeah, at home is definitely not safe, but at work, heck yeah! 😂

[@miqueiasnogueira2358]

recently changed my major to engineering based on legends like destin and mark robber

[@kurtownsj00]

That's right, do it at work on the clock! Okay realistically I've had to do a spray-pattern test like twice in 10 years, but it's still fun with the old testers!

[@cadencecachola4637]

Did you go to college to become an engineer before you were a mechanic?

[@bam.3767]

9:52 Destin's slow motion reaction is so far the best thing I've seen this year.

[@vigilantcosmicpenguin8721]

That's something best experienced in slomo.

[@MikkoRantalainen]

Yes, it looks like his mind rapidly went "oops, glad I used safety goggles but if that thing would have caused any bigger fireball, I'd be missing some of my hair nonetheless".

[@ericthemantis]

Put the captions on. It says, ".....". lol

[@luviskol]

"It was at that moment he knew... He done F'd up" or "If I go home with no eyebrows, my wife is gonna kill me"

[@philmiller681]

Safety squints.

[@highlythought-outlowblows5530]

Remember my brother that your taking the battery out was not an act of idiocy, it was an act of ignorance. Ignorance that was removed after learning occurred. Speak kindness with yourself as we all do our best with what we know until we know more, and by striving to be Smarter Every Day you empower others to learn that ignorance may abate. But there is always a difference between ignorance and idiocy. Much love to you and yours.

[@hacksmith]

That was awesome to see!!! Thanks for sharing!

[@firestar1056]

Fuel injector flame thrower when?

[@harold1844]

woah

[@bhuvansundarr1346]

The last few slomo shot were incredible, I mean i was so mesmerised to see stuff that you cannot normally witness. Thank you Destin for the fantastic content that you share here, and this is what we need.

[@smartereveryday]

Thanks for saying kind things!

[@maybach6536]

@@smartereveryday I would love to know what those 2 books you referenced were, being in the automotive field I’m always looking to Learn new things. Any help would be greatly appreciated!

[@gregwhitton2293]

Those were some of the clearest, crisp, sharpest slow motion images of fire I've ever seen. Absolutely beautiful and mesmerizing. I absolutely love this channel. Thank you Destin.

[@darksunrise957]

It probably helps when the thing you're filming produces it's own light XD Half the difficulty to slow mo shooting is that each frame of video has so little time to collect light that things either need to be really well lit, or end up looking darker, or the shutter speed is adjusted for more light but blurrier images.

[@mojeimja]

you just made a certain pair of guys sad, slowly sad :)

[@devonwilliams2423]

As a robot i find this video extreme attractive

[@masonplant2773]

Not saying these shots aren’t fantastic, but I’d highly suggest you check out The Slo Mo Guys if you like that kind of high quality slo mo!

[@franklinpaul368]

Hello there. I'm a mechanical engineer building HP Boilers in Uzbekistan. I must say that I love your videos. You inspire the curious child in me with wonder and awe of the world around. Also, I'm glad to see the Bible references at the end of each video. Thank You very much.

[@Fixthisbuildthat]

I wonder how a flame would interact with laminar gasoline flow? Because there is no turbulence would it just never ignite, or maybe the flame being a flow of it's own would disturb the laminar flow and cause the turbulence needed for ignition. These are the thoughts you make us think, Destin 😂

[@nickldominator]

I wonder if the airflow would cause enough fumes to form and be ignitable around the flow 🤔🤔

[@Heroo01]

Gasoline is INCREDIBLY volatile. It'd start to evaporate on the way down and the fumes would easily catch on fire. The liquid isn't ever what ignites. It's the vapor coming off of it. It's why you never use gasoline as a fire starter. If you wait more than a couple minutes, you have a massive cloud of gasoline vapor that's literally ready to explode once lit.

[@ivanbarreras9445]

@Hero to his point. I guess laminar flow would best increase the chances of minimal gas build up given minimal surface area. So it would light. But I guess it would be the hardest to light of the flow patterns. Maybe. I've never done the test, just guessing

[@Heroo01]

@@ivanbarreras9445 It'd still be flowing past a lot of unsaturated air so the gas would naturally kind of want to fill it. The BEST case open air scenario is a deep container with no air flow over it. Gas vapor is heavier than air so it'll mostly sink and should somewhat stay contained without airflow disturbing it and allowing more to evaporate. Still, gasoline is probably the most volatile liquid I know of other than maybe alcohol. Any gasoline left in open air isn't gonna be great news. But yes, the smaller the surface area, the slower it'll evaporate. So laminar would definitely be best

[@moos5221]

gasoline liquid never burns, it's always just the vapors that burn. so in a laminar flow condition it would still just engulf the liquid with flame and would likely disturb the flow at some point. would be interesting to see though.

[@christianschrull8110]

I just love how after all these years, you still have the same sense of wonder that you had in the beginning. Cant wait to learn more about this with you!

[@marcuscorrea88]

After, I dunno maybe 10 years, Destin still have me curious and fascinated with nature, science and engineering with the happiness of a child. My first and only "ring the bell" on youtube for a decade, and never regreted!

[@joshuaclayton6940]

Those slo-mo burning patterns were so beautiful. Came for science, stayed for the art.

[@helvettefaensatan]

Yeah, there is not enough ‘writing it down’ for this to be science and not mucking about.

[@JohnWilliams-ee9el]

When you have fire and nervous giggling, you know you’re at the cutting edge of science.

[@TheMrAshley2010]

+

[@eleycki]

With 50 year old diesel tech? 😂😂😂 right.

[@voidlaser02]

Honestly I just love the music and the vibes this video gives. It's such a wholesome way of exploring complicated stuff

[@MrNiccholas]

I truly can't thank you enough for these videos. Your video on carburetors is probably my single favorite video on the internet! I've been interested in small engines since I was a kid and when I was about 10 my dad bent a crankshaft on a lawnmower engine. He knew it was ruined, so he gave it to me and I spent a summer "dissecting" it and learning as much as I could. I figured a lot out on my own, and became the neighborhood small engine kid. The carburetor was always an issue for me because I couldn't understand how it worked. That video unlocked so much for me and helped me SOOOO much! I actually sent it to a buddy earlier this week because he was having problems getting his snowblower working!

[@SLOCLMBR]

Agreed, definitely one of the best videos on the topic.

[@goosenotmaverick1156]

Agreed! I already knew how it all went, and worked, been working on small engines for years. But seeing it all in action was fantastic! Visualizing it that way was the best way I've ever seen it explained. It took me a long time to wrap my head around it, when I first learned

[@pleinairr]

Hey Destin, my family had a small business dealing with Cetane testing, so we spent a LOT of time working with various fuel injectors. We even produced some high speed footage of auto-ignition in a combustion chamber by using a quartz window back in the early 00's. High speed cameras have come a long way since then. I think the cameras we were using were something like 180px horizontal resolution, haha. It's super cool to see the flame propagation through air with such detail! Very cool to see this being covered!

[@SDAspra]

That last shot of the flame engulfing the whole screen in slowmo with the background music 15:40 was literal 🔥

[@Evinosx]

Destin, thanks for continuing to pursue your curiosity with random stuff. Your channel has been a big influence in motivating me to return to school after a career in ophthalmology and get an engineering degree. Now I'm 3d printing homes! Your channel is inspiring a generation! Keep it up!

[@kineticdeath]

I just love the way your friend not only remembered being part of your show looooong ago but he was instantly in with what the topic of the video was

[@Bleeper168]

This is my favorite episode of Smarter Every Day. The music, the visuals, and the mechanical engineering - I love it all. Thank you for this video.

[@AirSafetyInstitute]

Awesome video, Destin. A lot of general aviation aircraft now use fuel injection (vs. carburetors) so it is cool to see it in action!

[@Pilotwisco]

the ASI and Destin should do a video together. It would be almost certainly be interesting.

[@Skinflaps_Meatslapper]

Aircraft have been fuel injected for well over a century now, long before it became common in automotive use, and it's kind of rare to find carbureted GA aircraft with more than 180HP. EFI and FADEC is probably what you're thinking of.

[@AirSafetyInstitute]

​@@Skinflaps_Meatslapper carbureted aircraft are still relatively common in the wider GA fleet

[@xmysef4920]

@@Skinflaps_MeatslapperIsn’t the reason for that because a fuel injected engine can work perfectly upside down or in any angle?

[@Skinflaps_Meatslapper]

@@AirSafetyInstitute Yeah, below 180HP, as I said. Above that point it's uncommon to see a carb.

[@qwasd0r]

Don't forget that, in your experiments, you had air at a pressure of 1 bar. Inside a cylinder you have a higher air pressure, resulting in more air within a smaller volume. This is why your flames only started further away from the nozzle instead of right in front of it, like they would inside a motor. Thanks for introducing this company to me. My father-in-law has an old Ford 1600 that's become increasingly more difficult to keep running due to missing parts. I hope they ship to Europe! :)

[@jakubstanicek6726]

The thing that was boggling my mind througoutthe video is that there is no air inlet for air on the injection system... this pressurized air you talk about, where does it come from?

[@Duality333]

@@jakubstanicek6726what do you mean there is no air inlet. You mean like a carb pulls air and full in with the pistons upstroke? It’s not like that with a fuel injection?

[@jakubstanicek6726]

@@Duality333 I mean, when he is spraying with the injector in the video, a 100% fuel goes through the fuel injector and the oxygen comes from the air around. If you spray into the combustion chamber instead, you need a way to prefill it with fresh air everytime before injection.

[@LR90_200TDI]

@@jakubstanicek6726 there’s something called the induction stroke mate, think you need to look up how an engine works

[@jakubstanicek6726]

@@LR90_200TDI Yeah thats clear when you have a carburator, I was just not sure how that works with injection. So only air is pulled in, and the fuel is injected after that?

[@ryana3679]

I think the best part of watching Destins videos is it unlocks the wonder in each of us on subject we never really considered. It’s an amazing feeling watching and going “holy cow that’s cool” or thinking “oh!!!! That’s how it works. Now I get it”. That gift of knowledge and wonderment is truly amazing.

[@blackbored-p3m]

I am a diesel engine design engineer and recently I was simulating flow from a injector and there is so much more happening. 1. Hydro erosion 2. Flow breaking 3. Droplet cavitation 4. Evaporation 5. Air drag 6. Swirl 7. Fuel leak (back flow) 8. Combustion bowl induced redirection Physics complexity arises from coupling of multiphase flow ,cavitation, fuel evaporation, thermal coupling, multiple interface boundary (fuel/droplet, droplet/air, air/vapour, fuel/air, droplet cloud modelling,). It’s so complex it just irresistible❤️

[@tjtobin86]

Please do more videos like this. Mechanical engineering is something you can read in a book BUT the real life experiments are super informative and fun to see in action!

[@mocko69]

It's heartwarming to see an adult having fun learning out of curiosity like a child! ❤️

[@fred_e]

He has such child-like wonder about the world and human engineering

[@archieohare]

The only difference between an adult and a child is the price of toys ;)

[@elrevelde04]

i get that feeling when going to different construction sites and we get to see and test other workers' tools, or learned how they work on their own specialty, we look like kids with new toys

[@danoconnell1833]

Destin -- a thousand thanks for doing your own closed captions. I love how all the technology terms are correct and the conversations are accurately portrayed. How I wish everyone would do this!

[@osmia]

+

[@ramosel]

Yes, BIG thank you for that!!

[@EggBastion]

big up for letting everyone keep up

[@earthling_parth]

Yes, ask KZbinrs who hi the extra length of putting accurate captions are underrated and those are the ones I usually support first on Patreon.

[@earthling_parth]

Just wanted to clarify that I meant "all KZbinrs who go the extra length". My glide typing habit makes me type fast but can lead to inaccuracies sometimes.

[@FastPaull]

I think it should be mentioned, these are DIESEL fuel injectors. Port injection Gasoline fuel injectors operate at a much much lower pressure and are controlled electronically. Direct injected gasoline engines operate similar to the diesel with them being ultra high pressure, even higher pressure than the diesel injectors.

[@JMEproductions]

I really enjoyed the music over the slow motion shots over sound effects, it really complimented the beautiful shots you got! Thanks for sharing this with us Destin!

[@JerryRigEverything]

Super cool video.

[@wlockuz4467]

Hello Mr Scratches at a level 6, with deeper groves at level 7.

[@kishananuraag]

Use these nozzles for your burn tests

[@zanw.awesome3102]

I don't trust you, You Rig Everything!

[@vinayakhuracan5182]

Let's get started 🤣🤣

[@sonan333]

I love when a channel adds their own captions instead of relying on the auto-generated ones. Thank you.

[@yummers2001]

was a particular highlight

[@stevebonds5157]

Listening to Destin giggle like a kid in a candy store is great. Proves that he is amazed making these vids as we are watching them.

[@stephaniemcpherson2558]

Farmers kid here & I absolutely LOVE what they’re doing at Cross Creek Tractor!!!! 🤗 May this business grow & thrive always!!!

[@ischuster383]

12:22 - you talk about the radial boundary being based on the stoichiometry, which is a factor, but also consider that there is flow happening! As the stream pushes outwards, it is carrying fuel mass and air (vapors) outwards, which continues to push the flame front in addition to the AF gradient. Super awesome stuff to think about! Thanks for this video!!

[@CasualQuasar]

I'm floored by those slow motion shots of the single jet injector, my goodness I wasn't ready for something that looked so beautiful. Just wow!

[@GeneralLeeIrritable]

I ran into Destin about a year ago right up the street from my house. I tell you what, he is as nice and genuine in person as he is in his videos. I was honestly star struck and probably a bit awkward. But he engaged in a great conversation with me about his videos when he went out on the subs with our US Navy. He is just a great guy. Thanks for more great content, Destin!

[@conkerconk3]

Destin always does an amazing job at making the recording feel "real" as if you're actually there (probably just the wide angle lens but still), which is awesome

[@jakeb92980]

Many years later after discovering this channel, it still makes me smile and laugh. And of course I ALWAYS learn something. A true gem in the youtube world.

[@markwebcraft]

You have captured some of the most incredible slow-mo flame footage that I've ever seen. Well done Destin, this is why I absolutely love this channel.

[@nalanewton]

Love your channel , i am a crop duster pilot in Brasil and in flight school we did learn all about piston engines but one thing is knowing the teory and another completely different thing is seeing how it work , thank you for improving my knoleged and making me smarter every day you are a great guy!

[@ethancempe8335]

If you filmed those flames in front of a solid black backdrop you could totally sell them on stock footage sites. I'd buy every one of them! Absolutely mesmerizing!

[@hhalkema]

15:20 looks like a donut... awesome 🙂.

[@ZacCrawforth]

Though your videos are extremely interesting and informative, it's your attitude and warmth that keeps me coming back for more. You're an inspiration for us all to be better people. Thanks!

[@glennbrymer4065]

I'm throughly enjoying your channel brother! As an old mechanic, I was fascinated by the slow motion! Seeing the shapes & vortecs as the fuel ignited and burned was just incredible! You are a LOT of fun to watch and listen to my friend! Thank you for giving us all the knowledge you pass along.

[@davidscott5903]

Just imagine how cramped all of that would be in a single cylinder! 🤯

[@trevordavis4728]

The “quad nozzles” are used for Direct injection, the “single outlet” injectors that spray in one direction are for indirect injection. Both shoot fuel at high pressure directly into the combustion chamber. Both are primarily used in diesels.

[@tjtobin86]

I love how excited you get when you are learning something. And you are a VERY smart man so its probably not super easy for you to get really excited learn something completely new (meaning, you probably know or have a guess about how most mechanical things work).

[@ricalbobby]

What were the names of the two books you referenced? 12:54 Thank you for always making your videos fun and descriptive at the same time. Your curiosity into every subject makes me interested to learn how it all works. I wish you were my science teacher in high school 🙂

[@MrAman47]

I'd also like to know!

[@HermanVonPetri]

Those are a set called "How Things Work" and there are at least four volumes in the set. They are credited to illustrator Roger Jean Segalat and originally published by Edito-Service SA, Geneva but released in the USA by Simon + Schuster, and George Allen & Unwin in England. How do I know? Because my dad gave me a set when I was younger and I have them in my hands right now. They're wonderful!

[@SoloRenegade]

@@HermanVonPetri Thanks!

[@ricalbobby]

@@HermanVonPetri thanks so much!!

[@Joytaze]

@@HermanVonPetri You deserve the best-answered-question-of-a-youtube-comment-award of this year.

[@YouNameItGaming]

i just love the way slomo gives you a look at the finer details of stuff that we see around us everyday, its like looking at things under a microscope, amazing! keep up the great work

[@bware_7]

Hey Dustin.. I’m going back to college to learn electrical engineering bc of the inspiration I get from this channel. You’re a goat. And I would love to be able to email You when I have questions.

[@lukemccready2886]

Loving this engine series so far! It would be cool to see a video from you on drag racing, there’s so much suspension geometry, weight transfer physics, and tire technology involved on top of just making a powerful engine.

[@_cods4]

As you were stating in the video about boundary conditions, it brings to question as to how much that changes with compression and differing methods of injection. Fascinating content as always!

[@thedanchannel5528]

Specifically in a diesel, the air temperature generated from compression should reach well over 400*F. This does two things. Diesel fuel is heavy and oily, which makes it hard to atomize. Part of that atomization happens due to injector orfice geometry, but the heat inside the cylinder helps to further atomize and mix the fuel with air. Second, the air is hot enough to cause auto-ignition of that atomized fuel. This is why todays diesels operate in excess of 30,000psi of fuel pressure to guarantee the best possible atomization and shorten the time for auto-ignition to occur

[@DavidBergman1776]

Any way you could analyze 2 stroke carburetors? They are crazy cool and significantly different from 4 strokes since they are diaphragm run. Would love to see it. Also would like to see how they're made.

[@Skinflaps_Meatslapper]

Most 2S carbs really aren't any different from 4S carbs, generally it's just a matter of re-jetting to make them work in either. The reeds are where they differ, that's not part of the actual carb but rather the intake itself.

[@lezbriddon]

do you have a link to a picture of one of these carbs?

[@DavidBergman1776]

@@Skinflaps_Meatslapper Yes, I know the venturi system is the same, what fascinates me is the complexity of the passages inside the carbs I guess.

[@Skinflaps_Meatslapper]

@@DavidBergman1776 So, you're saying that just any carb would work then? Because a 40mm Mikuni carb works just as well on a 4 stroke motorcycle as it does on a 2 stroke quad. In some cases, only a few adjustments need to be made to the needle position and idle jet...there is no physical difference between them. I'm still fascinated that the tiny carbs on weedeaters and chainsaws work as well as they do, even though they're so much more simplified in their operation compared to something found on a dirtbike or a car...they're still doing the same exact thing with a fraction of the complexity at whatever angle you want to run them at. What you might be more interested in is the old pressure carbs that they used on WWII aircraft, those were extremely complex with a multitude of passageways, bellows, chambers, and various metering systems all working as one to deliver the right amount of fuel at the right time. They're complex enough that only one or two companies in the US are capable of properly overhauling them these days.

[@imstevebarry]

Not going to lie. This was one of the most beautiful things I have seen in a long time. Thank you.

[@joebanks1866]

This has had some amazing slow motion, but that single nozzle injector at the end is the coolest thing you have ever recorded (IMHO). So Beautiful. Thanks.

[@toomanyhobbies2011]

Wonderful description of how Diesel fuel injection works. You really deserve 10.4 e6 subscribers for all that hard work you put into this channel! Thank you.

[@KaminKevCrew]

I really enjoyed this video. Since you’re planning to explore other methods of fuel injection, I think it would be extremely cool to see a comparison between a typical car’s fuel injectors (~350cc/min) and a big methanol fuel injector, like top fuel/high end drag racing uses (the biggest individual injectors I’m aware of are advertised as being able to flow over 11,000 cc/min, or 1050 pounds per hour of fuel).

[@pyroavok]

What's the flow rate of one of them 100,000 hp cargo ship engines?

[@beaner2907]

This would be so cool!

[@Gitomtom07]

I was totally mesmerized by the slow-mo fire part of this video. Please don’t stop doing what you’re doing.

[@SC457A]

I am so glad I found this channel a few years ago. The range of subjects, the work put into each video, is always top level. I have always been curious and took a lot of stuff apart over the years to satisfy that curiousity. Possibly one of the reasons I became a professional car mechanic. Learn something new almost everyday.

[@brian4872]

The last shot, I felt like I was inside our Sun. Observing the innerflows of hot plasma, atoms fusing together, expanding pressure, all of it. This was seriously a mindblowing video seeing you explore the workings of something we have all done as little boys in our garage with hairspray. Destin you are such a delightful person, truly love watching your videos over the past few years. Best greetings from Terschuur, The Netherlands 🇳🇱

[@MBobLamy]

So glad to have you back in my life. I'm not sure when I stopped watching your videos. I remember the first videos I watched, such a long time ago. I've been a patron when I had income, and in all those years I've changed so much, but you remain an admirable model of curiosity and desire to understand the world. I hope you'll explain how the atomizing happens in the injectors, that'd be useful for my job (fuel boilers service)

[@savagebear9729]

I love how you take some of the simplest and well used things around us and explain how they work. As a mechanic I know how they work however it is awesome to see them work in slow motion

[@pauldonlin3439]

Loved this video! Something else worth noting regarding the ignition point of the streams, inside the combustion chamber of a diesel engine, the air pressure is many times that of atmospheric so your ignition point along the stream would be different than what is seen in the garage setup.

[@A_Gray]

Thank you for continually sharing your love of learning new things with us! Im always amazed by your ability to make an engaging and entertaining video about even the smallest of things. Genuinely, thank you.

[@AayushPatel-gc3fw]

After completing my engineering, now i got to know what engineering is from your videos, thanks to you and love from India

[@ParsMaker]

nice work , also these diesel injectors are exposed to chamber where combustion happens and they get extremely hot and it helps the fuel to ignite better, now you much smarter 😇

[@nobodynoone2500]

You should specify Diesel/mechanical injectors, they are quite different to the common gasoline injector used in cars.

[@salmothymus]

aside from being super interesting and visually/technically informative, your boyish thrill and enthusiasm is totally infectious.....you bring me back to my childhood when everything was possible, lack of real knowledge being surpassed by a huge amount of imagination and bravery....I love your spirit as much as I am thrilled with the scientific and engineering aspects of your endeavours 😃

[@GodlikeIridium]

Another amazing video teaching normal but interesting stuff! I absolutely love your videos. And you're such a nice person, always having a good time with lots of people showing you and us interesting stuff!

[@iCanHazTwentyLetters]

You make a mistake in the video. 12:35 No the flame is not just stopped by the stoichiometry. The velocity of the fuel is also faster than the flame propagation. See Bunsen burner.

[@benemenhall4215]

I love learning stuff I don't really need to know, these vehicle ones have been amazing. In the future I'd love to see how a clutch works because they just don't make sense to me

[@NickyNooNah99]

I would LOVE to see a video on exactly how these injectors are made. Modern common rail injectors are astonishing feats of engineering.

[@Aivopieru.]

Looks like you re-invented a flamethrower there 😄

[@brendanberry7403]

Common rail is the Cummins term for fuel delivery since it's a straight six and all the injectors are fed off a single high pressure rail and it's a much much higher pressure system than anything seen in this video. Idle at 5-8Kpsi and see 25+Kpsi at full throttle. What would be neat to see is one of these fired without the FCA limiting the pressure out in the open but going to need a lot more safety precautions lol.

[@jreererer8490]

You should check out mechanical fuel injection pumps, they are amazing piece of machinery, almost like a separate little engine.

[@phalanx3803]

Good old Bosch VE and Cummins P pump.

[@Jethroblank]

Great video and I loved that my boys picked up in the eye of Sauron image. They were so excited when you pointed it out a moment later.

[@additionalgirth544]

Love your videos Destin, always great to see more automotive engineering!

[@PaftDunk]

Once again, always amazing what you cover Destin. It's great to see and understand what we're protecting with our diesel filters- Years ago there was an uptick in failed/clogged injectors due to the 10-50? micron diameter holes clogging up with dirt and particulate, the whole industry had to switch to cleaner filtration because of this. We sell a lot of bulk filtration filters/equipment to southern Europe/Africa/South America as their mining, farming, digging, etc equipment is becoming newer but the infrastructure handling diesel isn't close to as clean as it should be. Yes, all that equipment has filters on it, but they are not 100% efficient in removing all sizes of particulate... which leads to injectors clogging over time. Garbage in, garbage out!

[@J3STT3R]

Hey Destin, how are you? I’ve been watching your videos for probably 5+ years now and I just wanna say thank you for always curating my scientific curiosity!! I love science any type of science, I love just knowing how and why things work. I’m now studying biomedicine at university and was wondering if you knew of any channels, like yours, but more focused towards the biology side of science……or if you would ever start covering that yourself? Much love an keep doing your thing❤❤❤

[@thomas.02]

Have you heard of Real Science? Sister channel of Real Engineering covering biology animals and all that fun stuff

[@Tommy.McLean]

Your clear Carb video is still my all time favorite video, movie, gif, EVERYTHING!! I'm a professional harley tech with a shop in Florida, and after years, I still geek out at least once a week on that video.

[@TheBrainlessSteel]

the Highspeed was awesome as always. just like your reaction. keep enjoying what you do, and we all will keep enjoying it with you.

[@nuramo]

I am so excited for more parts to this. Thank you for making such amazing videos. I dont always feel like I can chase my dreams to be smarter, but at the very least I can sometimes here.

[@nicompton]

I had a full set of those “how things work” books on my shelf as a kid! Loved reading through them, especially the steam locomotive. Great video Destin! Oh, and I think the limit you were looking for is the flammability limit, the ratios between which combustion will occur for a given fuel/oxidiser mix.

[@koaasst]

same here! i only have 3 left, but i remember reading those things everyday. im 49 now, man its been a spell

[@Mesarim]

I've got the set of 4, I always wondered if there were more? Amazon sometimes has them, but they are as rare as hen's teeth.

[@Leon_George]

@@Mesarim hello, could you please let me know anything else about the specifics of the book set's name?

[@Leon_George]

Hello, thank you for including the book's name, but could you include anything more specific that might help me track it down? I would love to purchase them one day.

[@joshuaschneider2429]

ok i love how excited you are for this from a fellow mechanic. you ignited the diesel safer than i do in a shop for newbies to show them the "burn process" but im glad you love this. i hope you learn to wrench there is a ton of physics and geometry there that would be super cool for you to teach and just maybe something i might learn about bolt stretching and torque specifications

[@shaunandsqueak]

Heya Destin awesome vid! Just an after thought .. could you use the oxy torch with an oxygen rich flame? that would give you the brightness for your camera and more oxygen at point of ignition.. as always love the vids keep them going this Kiwi is getting smarter everyday! haha :)

[@christianhorner001]

Brilliant video as always Destin. I'd love to see a collab on this topic with an F1 team engineer and understand how advanced their fuel injection systems are .

[@sethdistler5332]

Underrated comment

[@Menegonz]

That would be reaaally awesome to see! Bta, a whole series about those F1 engines!

[@407Swashplate]

Hey Destin! Thanks for the awesome video! Fuel/Air mixtures are such an interesting mystery to many of us.

[@salmaazir7330]

I'm also a Mechanical engineer, currently working in bharat benz, but trust me after I watched your video, im so happy that I choose this stream, it's so amazing...yaa, this small things running big heavy machines....I'm so happy, now I want to learn more deeply...😊

[@janeturner3508]

I adore you and your work so much. Any time I get to sit down and enjoy your content my day gets 100% better. Thank you for all you do! Also your Family and your Dad!

[@parasamm]

U want ur science teacher to be destin 👇👇👇

[@thangnguyen02]

With the current salary?!

[@JeffRAllenCH]

Destin is the stochiametric mix of joy, beauty and wonder.

[@marcd1981]

This was very interesting, and I'll be showing this to my wife as she wants to learn as much about engines as she can. She bought a 1967 Ford Country Sedan Wagon (not the Squire with the wood paneling), and we are having engine work done on it. The thing I was thinking about as Dean was spraying and lighting the fuel in his shop was that this all takes place inside the cylinders, as he showed in the books he found. So this pattern of fuel-air mixture will be more uniform and easier to light off with the spark, making it more efficient than it seemed in the video. The other thought I had when Dean was at the tractor parts factory was I hope this video going public doesn't trigger an OSHA audit, as it looks like some things need to be cleaned up there.

[@sglc7100]

Destin, super job mate! I can’t thank you enough for these videos. You are truly doing God’s work! Looking forward to future videos as always. Wishing you and your family a happy and safe 2023!

[@Deltatwo3]

I absolutely love that your accent comes on a little more when talking with locals from your area! I live in the south as well and notice I put it on when I'm around people with one as well! I think I do it subconsciously.

[@NYPATRIOTBX]

This is awesome, love seeing a company step up to the plate to keep old machines running.