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

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

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

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

eriklona
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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

scenicdepictionsofchicagolife
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"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"

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

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

mr.levintouge
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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.

gameeverything
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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 !

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

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

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

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

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

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

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

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

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

mikekopisz
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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.

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

drtm