Why It's Almost Impossible For An Engine To Rev Over 20,000 RPM

Рет қаралды 2,069,215

Күн бұрын

Thanks to Keeps for sponsoring this video! Head to keeps.com/b2b to get 50% off your first order of hair loss treatment.
The average RPM range of our boring consumer cars, or heck, even our more performance fueled cars are sub 10,000 rpm. So how does F1 make an engine that revs to 20,000 RPM? And why would they want to? What does a higher revving engine mean for performance?
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Пікірлер: 4 400

@carhawara3394 3 жыл бұрын

"Isnt limited by physics, but rather by mother nature!" These are sentences that Start riots at technical universities

@esh92 3 жыл бұрын

yeah that was a dumb sentence

@BunnyBUNGALO 3 жыл бұрын

You're not understanding the context. In that video they showed it would be more than possible to break the world land speed record if there was enough space, but there isn't enough space on the planet to break it. Thats why.

@jaykoerner 3 жыл бұрын

@@BunnyBUNGALO how is that not related to physics.... Literally anything could be attributed to physics,

@MX26_ 3 жыл бұрын

@@jaykoerner It is, and in a way it's caused by physics, but physics would allow for more top speed if we had a long enough stretch of straight road. Still a bit of a silly thing to say, but it kinda makes sense.

@thomasrogers8239 3 жыл бұрын

Had the same feelings and thoughts.

@inniyewtesfaw2003 3 жыл бұрын

"impossible to rev over 20,000 rpm" that one Honda at 2am: watch me

@eric97909 3 жыл бұрын

Or rather, Listen to me

@ValentineC137 3 жыл бұрын

@@eric97909 you say that like we'd have a choice in the conversation

@ellogovna8329 3 жыл бұрын

have anyone heard of a super bike that can reach 52,000rpm? its called the MTT Y2K.

@ellogovna8329 3 жыл бұрын

it powered by a turbine from marine turbo technologies

@ellogovna8329 3 жыл бұрын

it can also outrun a veyron in a drag race

@eriklona8806 3 жыл бұрын

F1 engine's stroke is just above 2 inches. 😏 I had a feeling we had a lot in common

@KayJblue 2 жыл бұрын

3:18

@the_icon_of_sin_94 2 жыл бұрын

Same

@superior6564 2 жыл бұрын

"I have a small dick" 😂 "LOSER!" "I have a big dick" 😂 "LOSER!"

@boywithoutsoul587 2 жыл бұрын

Well you don't drive F1 cars on streets and most of these females are made for the street.

@eamador83 Жыл бұрын

I’m dying 😂

@mr.levintouge154 3 жыл бұрын

Bunta: "Be sure to rev it up to 11,000rpm Don't lose."

@willthethrill2078 3 жыл бұрын

Noticed you senpai

@jrojassengard2586 2 жыл бұрын

Takumi: what's a '86?

@ThisIsCexary Жыл бұрын

What color is your 86?

@lucasaal61 3 жыл бұрын

"its impossible to an engine to go over 20k rpms" -My dads fiat engine when i used to miss shift at 120km/h "No, it ain't"

@TheTyisawesome 3 жыл бұрын

☠️☠️

@elweewutroone 3 жыл бұрын

💰 💴 💵 shift

@shenaniganshop3309 3 жыл бұрын

😂😂😂

@oscardbg9654 3 жыл бұрын

As far as i remember, f1 engines used to run at almost 20k rpm...

@Stand_Tall 3 жыл бұрын

@@oscardbg9654 think they were limited at about 18 000 rpm

@matteoprada5851 3 жыл бұрын

2 stroke: *HELO*

@mitchsharp5718 3 жыл бұрын

That moment when you’re standard 2stroke bike Revs to 14000rpn

@710Canada 3 жыл бұрын

The 02 ZX12R could hit 16k. 4 stoke 4 cylinder.

@cameronbitz9124 3 жыл бұрын

@@710Canada so not 20k

@fabionajazi6180 3 жыл бұрын

I seen two stroke bikes on a video revving up to 21.5k

@710Canada 3 жыл бұрын

@@cameronbitz9124 wow, aren't you gooder at maths... 14k isn't either. Or is it?

@scenicdepictionsofchicagolife 3 жыл бұрын

I feel like nobody remembers about Desmodromic valves. They are the literally unaffected by valve float as the opening AND closing are mechanically controlled! :D

@zorktxandnand3774 2 жыл бұрын

Well they constrain the valve position by not only opening the valve by a cam, but also use a cam to close the valve in stead of a spring, thereby not allowing any valve float. Only problem is that the load on the closing cam increases with RPM, while it reduces on the spring. I don't think a Desmo could go as high as 20K Also it turned out the valve float they tried to fix was not so much a problem of RPM, but more of valve spring oscillation. This is more easily fixed by using 2 or 3 smaller valve springs (with different resonant frequency's) in stead of 1 big spring.

@davelowets Жыл бұрын

Desmo valves are NOT the answer

@noahdavidson7008 10 ай бұрын

“Impossible to rev over 20,000 rpm” runaway diesel: hold my beer

@The_Mup 3 жыл бұрын

"This week on money pit, we're gonna put koenigsegg's freevalve system on our miata!"

@wowgodiamond 3 жыл бұрын

"super expensive" The guy said he installed it on his Miata engine for less than the cost of a nice exhaust. Sounds pretty cheap to me for the installation of Free-valve technology.

@nszngaming9372 3 жыл бұрын

Yess lmao

@JosephRedfern 3 жыл бұрын

(For anyone wondering: kzfaq.info/get/bejne/e597fcKXnLipd6s.html)

@Grumpy_old_Boot 3 жыл бұрын

He forgot one big problem of high engine RPM ... lubrication ! Once the pistons exceed the speed that the oil film can hold itself together, the film "breaks", and then there's no lubrication. Once you have metal-on-metal movement, friction rises drastically, producing insane amounts of heat. And if it gets bad enough, it can fuse/weld the piston to the cylinder ! And then everything explodes !

@waynewhite2314 2 жыл бұрын

exactly...I think above 600feet/min with hydrocarbon oils

@Grumpy_old_Boot 2 жыл бұрын

@@waynewhite2314 Add another zero, and you're in the ballpark of most modern sports cars. But yeah, new oils are better at high piston speeds. 😀

@waynewhite2314 2 жыл бұрын

@@Grumpy_old_Boot yeah I think it feet per second...my bad

@Grumpy_old_Boot 2 жыл бұрын

@@waynewhite2314 No problem, it's all good. 😀

@tiagofigueiredo2529 2 жыл бұрын

Honda rc115 says hiii 👍

@michaelshive6748 3 жыл бұрын

If I'm not mistaken, the 2.4L V-8 of F1 from 2006 to 2013 revved up to 22,000 rpm

@MDDeGrande1994 2 жыл бұрын

Not only the V8s but also the V10 from the 2004 BAR Honda 006.

@tiagofigueiredo2529 2 жыл бұрын

Honda RC115 reved up to 22.500rpm

@alecjones4135 2 жыл бұрын

Only reason why I watched the video was to see if he mentioned those F1 engines

@canadianwelder3899 Жыл бұрын

Think Cosworth did it first

@AnIdiotAboard_ Жыл бұрын

They never reved that high at a GP Event, the FIA got wind 22,000 RPM Honda engine with significant performance upgrades, a 19,500 rpm limit was enforced after pre-season, later reduced to 19,000 rpm because teams decided using beryllium was not a good idea but a bad idea. Even though 20,000 is an arbitrary figure were not limited there, and there are plenty of engines that will scream well north of 25,000 rpm.

@gameeverything816 Жыл бұрын

I've watched a lot of donut videos and this one in particular is fantastic. The editing, knowledge, pacing, and actual interesting information was spot on. What a great video.

@additin7470 3 жыл бұрын

Mom: *money shifts my Miata* Cylinder 4: “20k RPM? That’s easy!” Air Force One: “Something just hit the tail of the plane....”

@ahmedneamah7836 3 жыл бұрын

Hahaha cheeky

@Thri11seeker 3 жыл бұрын

Lmao

@heygek2769 3 жыл бұрын

Rodney!

@fbi3544 3 жыл бұрын

Rotary: *Am I A JOKE TO YOU?!*

@imluna6455 3 жыл бұрын

@@fbi3544 yes

@FuSiionCraft 3 жыл бұрын

2 strokes and rotaries : *idle at 50k rpm, rev at infinity*

@jochen__ 3 жыл бұрын

*laughs in Simson 2 stroke engine*

@jochen__ 3 жыл бұрын

@FichDich InDemArsch Yeah but MZs also don‘t rev that high.

@therandomman6647 3 жыл бұрын

No valves so they rev as fast as you can put fuel and air in them

@Sakura4348 3 жыл бұрын

@@therandomman6647 sooo multiple inline turbos all with increasing boost and insanely large 1000 cc or bigger injectors?

@michelguevara151 3 жыл бұрын

@@therandomman6647 reedvalves and transfer ports, sir! do you know nothing of expansion pressurisation exhaust gas valving? those spannies stop unburnt fuel being sucked through at higher rpm causing over burn of the incoming charge, the reeds stop mixture being forced out via the carburettor, and the position and dimension of your piston's porting is your inlet valve and timing. then there's powervalve solutions of various types.. lots of valves in twostrokes, more in fact, more diverse.. some a little more theoretical.. but not as barking mad as intersectional feminism. ungineering mate.

@Alph92 3 жыл бұрын

I really like this style where you explain things in a serious manner without goofing around

@austinsmith9413 3 жыл бұрын

"no engine can rev over 20k" Me: drives old rc car with engine that revs to 50k rpm.

@jimbob9328 3 жыл бұрын

Was looking for a comment about nitros

@zachr5676 2 жыл бұрын

I was hoping to see a comment on rc nitro rc engines. I get that there is next to no mass compared to an automotive engine but it still is proof that it is possible

@neilmowles7964 2 жыл бұрын

@@zachr5676 two stroke rather than four stroke aswell

@faustin289 3 жыл бұрын

"...not limited by physics, but rather by mother nature." Is there a difference?

@TheTyisawesome 3 жыл бұрын

Yes one is a fact the other is opinion...

@faustin289 3 жыл бұрын

@@wubalub2535 do you have an argument to advance? Or you're just trolling the internet spreading toxycity.

@daszieher 3 жыл бұрын

@@faustin289 trolling the internet spreading toxicity? Sacrebleu, mon Dieu! Nooo! Who would ever do such a thing? 😱

@psmv3 3 жыл бұрын

@@daszieher cdn?

@psmv3 3 жыл бұрын

cdn?

@nellyishtari 3 жыл бұрын

The valve: *floats around* The piston: - Go back to your seat!

@xjmg007 3 жыл бұрын

The valve: (taps piston) no

@nellyishtari 3 жыл бұрын

@@xjmg007 The piston: - I said, back to your seat, it seems your guide haven't taught you anything

@aaronbryan5095 3 жыл бұрын

@@nellyishtari engine block and cylinder head: Oui, wtf are you 2 doing?

@usmanhaider8490 3 жыл бұрын

Valve: I like your cut, G. Piston: SMACK Valve: EEEEEEEEEEEEEEEEEEEE

@limegreenracerpro3369 3 жыл бұрын

If you really think about it, it's almost like a game of chicken. Just repeated.

@phatpun9545 3 жыл бұрын

This is a premium high school Presentation. Top notch. Very informative. 💯

@mikekopisz1227 3 жыл бұрын

Dude,The nitro engine in my track car (in thumbnail) runs @ a consistent 42,000 rpms and fits in the palm of your hand

@braydenwildey3366 2 жыл бұрын

Nitro Radio Control engines can rev all the way up to 50,000+ rpm!! You are right!! I have a Traxxas revo 3.3 and that bad boy peaks horsepower at around 30K. People need to be informed about these engines!!

@bmxscape 2 жыл бұрын

@_. this is a direct quote from the guy in the video: "the fastest revving motor peaks at around 20,000 rpm" he didn't say anything about the size or type of engine, just that it is a "motor". by definition he's wrong lol

@magnumowner 3 жыл бұрын

What i learned from this video is that actually the most limiting factor is money lmao

@LunarStrike 3 жыл бұрын

That would be the limiting factor to almost anything

@Popsicle_MP 3 жыл бұрын

that is by far the most accurate explanation

@Si74l0rd 3 жыл бұрын

Yeah, we all need Konigsegg free valves in our engines. Simple!

@Si74l0rd 3 жыл бұрын

@Enrique Rojo Jorge If you can't keep your data safe from 'em, might as well join 'em ;)

@silverliteway 3 жыл бұрын

Yes money let f1 rev up there and the teams planned higher...damn regs!

@RCTanksTrucks247 3 жыл бұрын

Good old CBR250RR revved over 20k. Loved that thing!

@danieltasker8012 3 жыл бұрын

Or a lot Honda’s 60s and 70s race bikes

@Popsicle_MP 3 жыл бұрын

i'm pretty sure they redlined at 19,000 and only if they had their ECU adjusted or you bought one meant for the Australian market, all the models built for the Japanese market were restricted and peaked around 17,000

@obsgr1 3 жыл бұрын

23000rpm. I had one. It was phenomenal.

@huh2634 3 жыл бұрын

@@darrengolladay9359 nope, cbr250rr's are 4 stroke..

@screamfingers 3 жыл бұрын

Yes my dude one hell of a bike. Makes all the right sounds.

@agentlongwood 3 жыл бұрын

In the section on valve float, I'm surprised yall didn't mention the system Ducati uses. Desmodromic valves have a thing like a rocker to open the valve, but no spring to close it. Instead there is another rocker looking thing that forces the valve closed, which is also run off of lobes on the camshaft.

@littleshopofelectrons4014 2 жыл бұрын

True enough but today's valve spring technology allows the engine to rev just as high without the complex desmo system. Even Ducati is phasing it out.

@the40ozprofit79 3 жыл бұрын

"It's Almost Impossible For An Engine to Rev over 20,000RPM" *Laughs in Ninja ZX2R with removed rev limiter*

@Ashchu117 3 жыл бұрын

okay so basically what you're telling me is that I need a rotary

@weekendwrench 3 жыл бұрын

They max at 20k rpm too 🙄

@jacobwebb8818 3 жыл бұрын

@@weekendwrench if a rotary were to hit 20,000 rpm the rotors would only see 6,666.67 RPM because the eccentric shaft is what is counted as a revolution from a rotary, the eccentric shaft spins at 3× the rate of the rotors

@DatDarkOne 3 жыл бұрын

I was waiting on this reply as I was saying the same thing.

@CrypticApathy 3 жыл бұрын

You would be hard pressed to do it. They wouldnt have to worry about the first 2 issues. But they would about the 3rd issue. You would spin faster then the fuel could be ignited. They already have a problem with having unspent fuel stock. Making them spin faster would only make it worse. You would more then likly just flood the engine at higher rpms.

@MazdaRX7007 3 жыл бұрын

A turbine engine would be the perfect rotary in this case.

@ammkdagoat3499 3 жыл бұрын

Jerry: " uno, dos, tres" KZfaq ads: "allow us to introduce ourselves"

@TheIcyWulf 3 жыл бұрын

Yes.

@IMattayy 3 жыл бұрын

I'm sure they time the ads for things like that Any time I get an ad like that I just think how about you fu*k off *clicks why this ad, don't see this ad again*

@baraaalasfar5841 3 жыл бұрын

I’m dead

@drearyfying249 3 жыл бұрын

KZfaqrs can decide where they put ads. Also, download KZfaq Vanced. I haven't seen an ad in months

@kali6651 3 жыл бұрын

Download KZfaq Vanced.

@crossmeister 3 жыл бұрын

"You're a trade-off, okay?" with finger pistols is my favorite Jeremiah wallpaper now.

@DrDrift-rl6cc 3 жыл бұрын

That was a pretty savage roast at the end

@Brisk999 3 жыл бұрын

civic owner: *see’s title* also civic owner: “are you challenging me?”

@Levi-ud2wj 2 жыл бұрын

underrated

@Brisk999 2 жыл бұрын

@@Levi-ud2wj ik man. i guess people dont like good comments anymore 😂

@plasma6593 3 жыл бұрын

that one civic at 3am: is this a challenge?

@thor6264 3 жыл бұрын

Civic makes at least 1,000,000,000,000,00 RPM

@andy56duky 3 жыл бұрын

@@thor6264 or make those ricers make a fartcan revving to 5000 rpm saying" its over 9000" like an idiot.

@darkknight097 3 жыл бұрын

@@andy56duky I get the first guy's joke but yours doesn't make any sense. A k20 civic can rev to 8-9k pretty easily

@drtm1718 3 жыл бұрын

Basically, Jerry at the end: "your mom should have sw--" Donut: "Cuuuut!"

@jeanm.9570 3 жыл бұрын

Yeah, I don't know why they included that bit when they even didn't let him finish...

@pdtrjck8068 3 жыл бұрын

@@jeanm.9570 like the mom shouldn't have let the dad do

@kmonkey4138 3 жыл бұрын

I wonder what the RPM limits of a rotary engine are. Would be interesting to see how much force an eccentric shaft could handle from the rotational force of multiple rotors

@christopherpape4823 7 ай бұрын

I was just thinking that it seems like something like a rotary engine would possibly provide somewhat of a solution for the first problem 🤔

@Noksus 3 жыл бұрын

Nice, actually learned a bit about how an engine works. Never been really interested in it much but that was neat.

@daviluluwinner1823 3 жыл бұрын

Simple answer: combustion engines can only go a certain amount of vroom.

@lucasmason2256 3 жыл бұрын

Good try

@wolfiethesniper5403 3 жыл бұрын

AKA overr 600 mph

@ericpe2325 3 жыл бұрын

@b1tb0mber 3 жыл бұрын

haha combustion engine go brrrr (but only so much)

@kylemelcher894 3 жыл бұрын

The RPM of Jerry’s heart during a Keeps ad is 100000000000

@mikesuarez9615 3 жыл бұрын

LMAO

@car-enthusiast3141 3 жыл бұрын

Lol

@honeybadger0562 3 жыл бұрын

That’s why he needs to donate to the Ronald Reagan medical center so he can have a healthy heart

@thomashanson6603 3 жыл бұрын

I love the fact that this suggests that his heart is just like rotating in his chest lol

@jasonander4964 3 жыл бұрын

@@thomashanson6603 HAHAHAHA imagine a surgeon about to give him a transplant or something and they cut him open and just see his heart spinning OBSCENELY fast

@matthagge4792 3 жыл бұрын

You forgot Ducati desmodromic valves! I know bikes aren't the focus of this channel but it's another very interesting way of controlling valve float.

@oscarsomers8597 3 жыл бұрын

2:30 in 2 sec this guy taught me what 15 min videos couldn't

@saims.2402 3 жыл бұрын

Imagine having engine’s with pistons moving faster than the speed of sound

@samantharondeau4580 3 жыл бұрын

Wonder what the exhaust note would be lol

@zirkh1609 3 жыл бұрын

@@samantharondeau4580 it would be deafening for sure. Just imagine multiple Sonic booms in fast progression. You would hear the exhaust note for a second and then hear close to nothing the next

@HappyDude1 3 жыл бұрын

They do that allready Edit Im wrong i did some calculations and its moves about 10 m/s at 6000 rpm if you count in both directions its 20 m/s And the speed of sound is 343 m/s 😆

@randominternetguy 3 жыл бұрын

Can't imagine this happening in a modern 2 or 4 stroke cylinder. There might be some gains from this new variable compression engines from a couple of companies, as the implementation reduced piston side load a bit. Still regarding piston engines though, I don't think it's near enough that an engine could surpass 24k rpm, as the con rod is the issue more than the pistons. However there may be a few rotaries, ie the Atkinson rotary, that may surpass this 23000rpm barrier quite easily. As I recall though the Wankel rotary is no good for this purpose, but I did hear that people got pretty close to record rpms with 13b motors. I also recall that the valve actually had little enough float that honda was using valve springs for it's first record setting f1 test engine. Ordinary valve springs.

@trevorsangsland7572 3 жыл бұрын

When something breaks the sound barrier the affect it has the air around could cause more issues i dont if you've seen a jet or a bullet in slow mo breaking that barrier but I think that force could potentially shoot the piston down in the cylinder. I could be very wrong tho "When the object reaches the speed of sound, air cannot readily move out of the way and a shock wave is formed. When the object is moving faster than sound, the resulting sounds travel behind the object, creating a sonic boom." (www.school-for-champions.com) So what were to happen if you created a sonic boom in a cylinder

@charlespletzke8311 3 жыл бұрын

Rotaries: haha dorito go burrrrrrrrrr at all the rpm

@willadams5758 3 жыл бұрын

Came to say the same LOL - I love my 82 GSL

@aestheticswim3397 3 жыл бұрын

better have a closet full of apex seals

@liamwagner9160 3 жыл бұрын

I was wondering why it wasn’t mentioned🤔

@charlespletzke8311 3 жыл бұрын

@@aestheticswim3397 an entire room in a house just filled with apex seals. Can’t carry any cargo, all the space is taken up by spare apex seals

@brokeandtired 3 жыл бұрын

Rotaries still have the flame front issues....So even they are limited...(And before someone says it...I know. R/whoosh....I know its a joke).

@davidvalderrama1816 Жыл бұрын

Sir, I assemble engines for a living, 15+years, and your presentation and explanation was excellent. Thank you

@christianmontrose331 3 жыл бұрын

You’re videos teach me more than school and I appreciate you guys much love 🤍

@inspector13jjf 3 жыл бұрын

That car in the beginning sounded like a little kid raging on COD.

@MyNameIsNidos 3 жыл бұрын

Literally the essence of classic MW2 lobbies

@Sahidable 3 жыл бұрын

Holy shit the accuracy 😂😂😂😭

@davidmesraje1695 3 жыл бұрын

Like I’m pretty sure all the donut media commenters recognize these same spam post lol

@davidmesraje1695 3 жыл бұрын

We all know your spam just stop 😂

@Marsonpika 3 жыл бұрын

Facts

@pf4877 3 жыл бұрын

An F1 car today: "I set a record in F1 cars for reving to 20,500 RPM" A CBR250rr from 1990: "Hold my beer"

@ftheweebs6799 3 жыл бұрын

RC 166 : hey

@shanondebbarma 3 жыл бұрын

RC149: Hey

@norwegiannationalist7678 3 жыл бұрын

Nitrp rc engine: hold ny beer

@bricefleckenstein9666 3 жыл бұрын

Williams FJ-33 as it's HP fan passes 45,000 RPM: "Was this supposed to be a competition?".

@ellogovna8329 3 жыл бұрын

Mtt ysk; amaturs

@nathanramos9675 3 жыл бұрын

As a rotary boi, I was sad to hear this knowledge bomb doesn’t include us

@Axe991 3 жыл бұрын

Another system col mechanically closing valves is the Desmodromic one, mainly used on Ducatis. You have one cam to open the valves and another one to close them.

@Niugnep 3 жыл бұрын

“You’re a trade-off. You’re parents traded off having a fun life for, ...” I feel attacked, but it’s too funny. Love you and the donut crew!

@zerobatsu 2 жыл бұрын

I love how it just cuts off before he digs deeper.

@Jonnyg325 Жыл бұрын

We demand 2 apologies, 1 for the insult, and one for an extremely tortured metaphor

@TheWinjin 11 ай бұрын

Also the editor poking fun at him with subtitles

@TypicalGoosie 3 жыл бұрын

“It isn’t physics is Mother Nature” goes on to discuss physics.

@heygek2769 3 жыл бұрын

talking about the previous video on top speed, the problem wasn't physics, it was geography

@abstract0407 3 жыл бұрын

Really weird and random physics

@buttsexandbananapeels 3 жыл бұрын

Yeah, it was a weak sauce intro.

@Dug6666666 3 жыл бұрын

HRC Honda, hold my beer. Small capacity RC 2 stroke engines around 40K rpm

@thiago4santos 3 жыл бұрын

Physics studies nature, so is accurate.

@alexstasko696 Жыл бұрын

20k rpm with this many moving parts is truly incredible

@philipgrice1026 3 жыл бұрын

1966 Honda RC166 motorcycle, as raced at the Isle of Man TT races by Mike Hailwood. 250 cc 6 cylinder with four valves per cylinder was run at up to 25,000 rpm on the bench and up to 20,000 on the track. Max power occurred around 18,000 rpm.

@maschan91 3 жыл бұрын

*valve floats* Ducati: Hold my desmosedici.

@MortimerJones99 2 жыл бұрын

I'm curious why he didn't mention Ducati during that segment

@therealsnoop7497 3 жыл бұрын

This show needs to be renamed to science garage Edit: for those of you saying, “NO!! The show isn’t the same without Bart!” In my opinion Jeremiah is still entertaining and knows about the stuff he’s talking about. He talks about how cars relate to science, just like how science garage did. The show is a lot more like science garage than bumper to bumper. Early b2b episodes featured James, and even Nolan and Jeremiah reviewing super cool cars. This is a lot different from old b2b, and a lot more like science garage. Even this specific video they did a science experiment, again just like science garage.

@cpscps2679 3 жыл бұрын

Sounds familiar...I miss that guy.

@ultraguy8771 3 жыл бұрын

@@cpscps2679 Whatever happened to him? I know he left because he had a kid, but he seems to have vanished off the face of the earth.

@jasonander4964 3 жыл бұрын

@@ultraguy8771 he’s on Instagram, @bidsbarto, and as far as I know, he’s left donut completely behind, not making any posts relating to them (again, as far as I know).

@ElZamo92 3 жыл бұрын

No. this dude looks like he knows nothing about whats hes talking about. Much unlike science garage.

@rootaficationism 3 жыл бұрын

You're way off dude!

@royharkins7066 3 жыл бұрын

Wow ,that was sensational , I learnt shed loads , thanks mate

@Ivovify 3 жыл бұрын

Great vid, learned a lot. Tnx!

@IKATEN501 3 жыл бұрын

"Make sure you rev it up to 11'000 rpm" -Bunta Fujiwara

@Alvon_PR 3 жыл бұрын

-Turn on Light's -Tachometer : 12100 RPM -Takumi : Oh Sh*t

@matthew_natividad 3 жыл бұрын

*Sound files rage intensifies*

@tubastud06 3 жыл бұрын

"Isn't limited by physics, but rather by mother nature" - That's... That's literally the *same* thing

@heygek2769 3 жыл бұрын

Nope, the problem was geography, not physics

@carlosverdugo9684 3 жыл бұрын

I dont think a plant is physics...

@Ryan....... 3 жыл бұрын

@@carlosverdugo9684 Every aspect of nature boils down to physics.

@ulifehr5357 3 жыл бұрын

What I THINK he meant "THINK", is how the fuel couldn't really catch up with the piston, so I mean yea it's a form of physics, but how rapidly do you think a gas could expand and ignite 🤔 maybe we need some new fuel? 2 Stokes don't use valves so problem 1 solved, but what's next? A super high pressure injector thatll help thrust a piston downward+ the fuel ignition? Idk we'll have to start making blue prints of the best possible design in engine motion

@jaykoerner 3 жыл бұрын

@@ulifehr5357 I think your talking about a wankel engine.... Fixes the majority of those a issues

@oddjobbob8742 2 жыл бұрын

Thank you for verbalizing my pain so clearly.

@jmontign1 2 жыл бұрын

Lots of good information here. Thank you

@ryanm2700 3 жыл бұрын

“You’re a trade off!” may be the best insult ever 🤣

@JohnnieFruits 3 жыл бұрын

I'm really surprised that Jeremiah, the motorcycle guy, didn't mention Ducati's desmodromic valve system

@srgbobbert 3 жыл бұрын

Glad I'm not the only one

@tartarosnemesis6227 3 жыл бұрын

Desmodromics for the win!

@andrewpalmer859 3 жыл бұрын

Or the old cbr250rr 4 cylinder bikes... 20k redline and for public roads!

@syoukhan 3 жыл бұрын

yeah beat me to it. I'm here in Italy furiously gesticulating at my laptop. This is unacceptable

@riadafandili4586 Жыл бұрын

wait, didn't he mention that in a different video though?

@parke4112 2 жыл бұрын

My dad is a mechanic and I know nothing about engines, I'm a musician, however, I really enjoy your content guys, love u

@Sabba7h 3 жыл бұрын

One of the few times I _don't_ skip through an in-video ad and it actually ended up being useful to me?

@catalystkitty 3 жыл бұрын

MC22 CBR250RR: 4 cyl 4 stroke, rev bouncing above 20K RPM daily since the early 90's and still going hard

@johnamador887 3 жыл бұрын

My first thought.

@Aduro90 3 жыл бұрын

My first bike 😍

@FirstLast-tx3yj 3 жыл бұрын

You had it for how long??

@ralphm4132 Жыл бұрын

yeah my workmate had a CBR 400 that went to 18 easy, while my FZR 400 only went to 15. We'd drag off the lights every day after work, good times.

@Emfourayone Жыл бұрын

17.8k actually tach was inaccurate cdi would only provide enough spark for that

@TheGardeinator 3 жыл бұрын

"The piston, it could hit that valve - it's called crap day"

@juliocabrera5842 3 жыл бұрын

I was thinking he was gonna say a profesional name for this 😂

@theaniahlator7954 3 жыл бұрын

Imagine a 20,000 rpm burnout 🥵

@mohammadyaqoob746 3 жыл бұрын

Thanks, I just got the idea for my final year project

@iPossum452 3 жыл бұрын

I love the newer direction that B2B has taken. It’s a really good continuation of what Science Garage used to be. Thanks Donut (:

@ankursagale 3 жыл бұрын

Takumi: So I started revving anyway......

@TheNutshaq Жыл бұрын

I love these videos where it’s just Jerry being smart for 15 minutes

@BoldRam Жыл бұрын

12a Rotary has been bench exploded at just over 33,000rpm. Different type of engine but sill pretty bloody impressive.

@DroopyLoops 3 жыл бұрын

Y'all auto color correct got my boy looking like he's got on Coral #4💄🙏😂😂😂

@yuuji_ 3 жыл бұрын

90's japaneses 250cc sportbikes toping out at 19k rpm : "i am speed"

@manman-sg1zt 3 жыл бұрын

130W dremel maxing out at 33 000 rpm...it do be like that though.

@dionpiazza4672 3 жыл бұрын

The Cotez engine Instead of valves with springs it was an overhead cam design with rotating trap door with bushing seals. It went hush hush and disappeared. I can’t find any on it anymore. It was based on a 302 Ford block.

@markaplier1261 2 жыл бұрын

The valve problem could also be solved by substituting the spring with a cam track in the spinning part(dont know the name). That way when the thingy spins it will always be symchronised with the valve

@TheCabbageMan 3 жыл бұрын

"Turns out top car speed is not governed by physics but by mother nature" sooooo... physics

@bricefleckenstein9666 3 жыл бұрын

And that top speed keeps getting pushed higher every so often. "waves at Thrust SSC"

@andreichichak5242 2 жыл бұрын

Yeah, I always thought that physics described nature, but I guess Donuts describe nature.

@thegreatafrican3367 Жыл бұрын

That was just a dumb statement

@thegreasybandit6373 3 жыл бұрын

Me: What it's over already? KZfaq time bar: It's been 11 minutes Me: Man, time flys.

@how57 3 жыл бұрын

You are the most chilled out donut media guy

@initiald22 3 жыл бұрын

Donut: Why It's Almost Impossible For An Engine To Rev Over 20,000 RPM. Bunta: Hold my Tofu.

@Keegsbruh413 3 жыл бұрын

Dont mind me. Just impatiently waiting for this week's money pit

@carsonmeyer1677 3 жыл бұрын

What happened to their schedule?

@Sam-rk6lq 3 жыл бұрын

Rip

@vincentasher9903 3 жыл бұрын

C’mon with the money pit!

@NomadJedi 3 жыл бұрын

No money pit this week or the next. They're on vacation.

@jakemauger8377 3 жыл бұрын

1/8 scale R/C car engines regularly turn 35-40k rpm. The really high end ones can sometimes reach 50-60k.

@edblock8117 2 жыл бұрын

I think most of these are 2 stroke

@stefanpariyski3709 3 жыл бұрын

The shaft speed(s) of jet engines are not limited by friction or wear (there isn't any), heat is only relevant for the gas generator and even then it is a compounding factor and not sole limiting one.

@Magomed_L 2 жыл бұрын

спасибо, вроде до всего этого можно было и додуматься, но концентрация инфы в одном ролике шикарная!

@929roger 3 жыл бұрын

7:17 You forgot the desmodromic system, which basically opens and closes the valves mechanically. A system which Ducati stills using today

@ardijanuar2036 3 жыл бұрын

Still doesn't solve the reciprocating mass and flame speed problem. It's also more complicated and require more frequent and expensive maintenance, like every modern ducati did (except multistrada v4)

@fred_e 3 жыл бұрын

Came here to mention the desmodromic system as well

@ArtoriusBravo 3 жыл бұрын

@@ardijanuar2036 I dunno man, correct me if It's just a dealership thing but a friend of mine nearly swapped his 1200gs for a Multistrada but backed down when he researched that the 40000 km service had a bill of around 2000usd.

@929roger 3 жыл бұрын

@@ardijanuar2036 at least valve floating is solved 😂

@PhilipBeresford 3 жыл бұрын

I came here to say this, but then I remembered that desmo Ducati's don't rev past about 12k rpm anyway

@rickyrotarys1501 3 жыл бұрын

Rotary engine: excuse me what about dorito engines

@damirock98 3 жыл бұрын

Username checks out

@denzelherrman 3 жыл бұрын

Piston:vroom croom braap braap Dorito:PUTA PUTA PUTA PUTA PAAAT PAAT

@scottmcqueen3964 3 жыл бұрын

Dorito's are even worse then pistons engines lol A typical sized rotary at 20000rpm would have a tip velocity of 900km/h. Its kind of hard for combustion to keep up with that haha. Not to mention all the other issues this causes.

@MrHunt-tg5nt Жыл бұрын

Le rotary - hold my brap brap😂

@mrmehdi4745 5 ай бұрын

How many times did you rewind the F1 revving part ?? Me: HELL YEAAAH

@mfnafi5 3 жыл бұрын

Me: *gets a youtube premium trial to skip all the ads* Donut: Here's a 15 minute ad for mail pattern baldness.

@krisscrossapplesauce6636 3 жыл бұрын

At least the ads are quite entertaining

@yaboianz 3 жыл бұрын

@@krisscrossapplesauce6636 true i rarely skip them because donut is hella creative lmao

@jarno3000 3 жыл бұрын

Mail...

@gabrielvieira6529 3 жыл бұрын

pololol.

@Applejack1396 3 жыл бұрын

I was just thinking the same thing

@FaaaaapMaster 3 жыл бұрын

0:22 Of course I needed to hear that engine on MAX VOLUME!

@ElliWoelfin 3 жыл бұрын

That was fucking painful.

@bloodyrizky 2 жыл бұрын

There's gotta be, at least one bloke, in the back, being a backyard mechanic saying "yeah I've made one spinning 35 thounsand"

@voidnimbus 9 ай бұрын

The thought of having Dr. Falcon as my new therapist is strangely welcoming

@mrtechnical4 3 жыл бұрын

I feel like you guys missed an entire section of piston engines that DO cycle consistently faster than 20,000 rpm. Nitro-Methane RC engines will spin at 30,000 rpm all day long and some will go higher than that into the 40,000 rpm range. Granted those engines use top fuel and also don't work if scaled up to actual car sizes, but they do exist. Obviously the valvetrain issue is solved by the engine being 2 stroke and the oscillating mass is taken care of by the high relative strength of the titanium they use combined with their low mass. It does leave me wondering how fast the flame propagation is using nitro-methanol if it can rev that high with no issues.

@megimargareth4015 3 жыл бұрын

Small cc engine means small space the fuel needs to burn to the edge, lol Thus the flame propagation in this case is on different level with a full size car, lol

@heygek2769 3 жыл бұрын

you answered your own question, the problem there is scaling, the movement of the cylinders is linear, which would scale linearly, but volume and mass don't scale linearly. this is also why airplanes can't just be scaled up or down with the exact same design.

@RandoTark 3 жыл бұрын

Regardless, every time I hear one of them or run my own ... Im always amazed the engine internals stay together at those speeds and last as long as they do ... its quite nutty.

@derekmaxwell8164 3 жыл бұрын

The old 1.5 litter F1 engines use to spin like 22k before they started making rpm limits to lower power

@derekmaxwell8164 3 жыл бұрын

@Hasi Mausi plenty? What like a 50cc motorcycle? Cause even the old high revving 250cc crotch rockets usually only turned 15-19k at most

@gamechip06 3 жыл бұрын

Ok I regret skipping the entire keeps ad and hearing "I'd look good in a bikini" without context

@madarauchiha2067 3 жыл бұрын

@@iwantsexseemyvideo2929 Wtf is is with these bots

@aperson6863 3 жыл бұрын

@@madarauchiha2067 the owners/people who pay for these bots think that since we like cars, were all a bunch of rich and _horni_ grimy old men when in reality, were either young adults, or literal children... And some of us aren't even dudes. Edit: also sometimes you can get reported for explicit language for @ing some of these bots, like the one you @ed.

@Tacko14 3 жыл бұрын

@@aperson6863 and there’s the vid going on about suck/squeeze/ah... bang/blow. Life’s not fair

@TheIcyWulf 3 жыл бұрын

You should.

@TheJagjr4450 3 жыл бұрын

Pretty good little vid... I try to explain to people that in road racing 5 grams (the weight of a nickel) off of each reciprocating assembly is worth more than 100 pounds off the entire weight of the car. - less power to accelerate the actual reciprocating assembly is more power to accelerate the car.

@kelvinjenkins3060 Жыл бұрын

Man, Jeremiah is such a good teacher, love it

@markwerner7297 3 жыл бұрын

I like how bumper to bumper just turned into science garage

@bruhnt5063 3 жыл бұрын

Day 82 of wanting Up To Speed back

@Didnt_ask69 3 жыл бұрын

Virgin

@lifeintheboondocks7516 3 жыл бұрын

We need up to speed

@machinis 3 жыл бұрын

@@Didnt_ask69 lol!

@ereder1476 3 жыл бұрын

to be honest i subscribed for up to speed and that big beared dude... I'll probably unsubscribe if it doesn't come back

@aneudysc 3 жыл бұрын

@@Didnt_ask69 Virgin't

@lobuxracer 3 жыл бұрын

Forgot one other important limiting factor. Air molecules only move so fast before you run into problems with mach numbers. Honda figured this out in the late 70's with their NR500 oval piston F1 motorcycle engine. The physics of air limits rpm to 24k so even solving for all these other problems (which they did with the development engines), you'll never fill the cylinders above 24k rpm.

@bentoombs 2 жыл бұрын

Hey Jerbear. Can you do a video on the Kõning 2 stroke methanol engine? We ran one of these on my dad's Pro Hydroplane for years. Really cool motors. The carburetors basically have two moving parts.We ran the 5 port. 13,500rpm sounds so angry😎 those Köning Brothers knew what they were doing back in the day

@dh66 3 жыл бұрын

I've got a motorcycle from the '80's that has a 19,000 RPM redline.

@Rotorr 3 жыл бұрын

mc19?

@dh66 3 жыл бұрын

@@Rotorr FZR 250R

@user-hc5si5tw5p 3 жыл бұрын

I really really want one of those. Some modern tyres and suspension etc would make that an absolute hoot to ride. Must sound like nothing else on a flyby.

@fokiralomgir2563 3 жыл бұрын

@@Rotorr had one of those. The sound coming from one of those was pure joy

@Rotorr 3 жыл бұрын

@@fokiralomgir2563 im currently rebuilding my mc22 for track use. If it wasn't as light and fun to ride i wouldn't have bothered. A simple twist of the wrist will bring a smile ear to ear.

@randomotter6346 3 жыл бұрын

Turbine engines: Whomst has summoned the ancient one

@v4skunk739 3 жыл бұрын

Are you dumb? There are no cars with a turbine.

@MrPruske 3 жыл бұрын

@@v4skunk739 jay leno disagrees

@v4skunk739 3 жыл бұрын

@@MrPruske Wow sorry there are like 5 cars built since the 50's and every single one of them was a complete disaster.

@rj6110 3 жыл бұрын

@@v4skunk739 5 > 0

@MrPruske 3 жыл бұрын

@@v4skunk739 np. It is very few. I think the turbine motorcycle is even sillier.

@mpraele 2 жыл бұрын

I believe that the "air" sucking by the piston is also a problem since it has inertia.. and for high revs the piston can move faster than the air can rush in.