This video shows an operational cutaway of a BMW S1000RR - a 193HP superbike - bumping against its 14,200RPM redline. A cam and valvetrain at 118 cycles per second is an amazing sight (and sound)
1. It's amazing how fast the spring can rebound. 2. I am amazed that cam lobes don't wear down faster than they do. Even with oil that is a lot of friction.
You know if you hit water really fast with your hand? It feels like you're hitting a solid? I'm thinking that the cam lobes are hitting that other oil covered part so fast that the oil acts like a solid and the two part don't really touch at high speed. Could be bro science though 🤣
@@CabinetFramingUK 100% correct. thats why the only part that matters is the film that the oil leaves behind as it is NOT compressible and at this thickness it is basically a solid
Been a mechanic for nearly 40 years and it still amazes me, how hard the internals of an engine work, without going bang, majority of people have no idea when they press that right pedal
That's why I fell in love with cars. At a very young age (I think somewhere between 6-10) I realized how complex and amazing they are. How big of a feat they are for human creation, even tho most Americans use one daily without second thought of what's actually happening.
And how they last for so long without wear. Saw an Audi A4 diesel engine taken apart with 820,000 km on the clock, the cylinders still had factory honing marks visible on them and the engine was in perfect condition, in fact it dyno'd at 5% more power than factory previously.
@@ashitkotian2396 I'm the one who is inventor of metallurgy I am the one who wrote theories on metallurgy and it's working dynamics get that in your head
@@DaN3xtSlimShady There is no "blow by", it's mist/spray from the oil getting vaporised. The engine you see is not functioning, you can only hear the sound of the valve train. It's electrically driven probably, just to show/film the valves doing their job.
@@gallardo20000 Most 600/750/1000cc class sportbikes are designed to be redlined 12-14k daily. Majority of these bikes last for years after heavy use which is a testament to today's engineering.
Even being a technician all these years. This still blows my mind that everything working in sync is doing one job Respect for these engineers! Maybe one day I'll be at this level 🥰
@@JMRabil675 This is a regular road going engine. Nothing special about it. F1 cars only pit for tyres nowadays. Shows you have no clue what you`re talking about...
@@banny123456 Because it doesn't??? This is a superbike engine... your typical heavy duty diesel that will run for 20 years only does a few k RPMs.... the racing lifespan of the engine above is only 2500-5000miles.
@@notallthatbad Well, normal engines don't turn this fast. Most cars have transmissions that allow the vehicle to go at high speeds while keeping engine RPMs low.
Formula One cars use compressed gas instead of springs to prevent "valve float" which is what happens when your engine is at such a high RPM, the valves can't close fast enough to contain the compression stroke and you lose power. So yeah, on very high revving engines, you'll rarely find springs.
scavengerspc this engine appears to have a valve return rocker. Another car love actuates it. It’s prevents valve float at high rpm by pulling back up on the valve once it has already been opened. I forget the name of this type of engine
@@derekhightower1530 It has nothing to do with over heating. They rotate so that they reduce wear on the valve tips. If they didn't rotate they would wear out faster.
Some one really needs to do this again with one of those 10,000,000 fps cameras, that would be a trip to see in slow motion, actually watching those spring go up and down that fast...
I was thinking the same thing, but then pondered, is seeing some thing that is going really fast, slowed down, really getting me any where, versus just watching it while it's going slow?
Terry Straubel I'd argue that it is. Acceleration and anything affected by gravity look completely different when at "hi speed slow mo." Think of watching someone run vs. watching someone walk; there are all sorts of details that are completely different.
Terry Straubel I've seen it in slow mo. I can't remember where though. It does indeed look different; the top of the valve spring goes up and down with the cam, but the middle sort of resonates back and forth like a slinky.
not quite 14k rpm but here's 8500 - just paste this after the watch? part of the url for a video v=WtqDHJDN79w (i can't remember youtube's standard reaction to posting links in comments)
I recently had a Gates timing belt that was putting my camshaft pulley off a half of a tooth, one way my 0-60 was really good with horrible low end torque, the other way lots of low end torque but it would actually slow itself down once I got to higher rpm accelerating. I ended up getting an OEM one and it solved all my problems. It astonishes how a smidge of a degree a camshaft can be off, make drastic changes to low end and high end torque, be driven a few thousand miles, and still not ruin a motor.
*Fun fact:* Ducati had an issue when developing the panigale v4 engines, which was the springs not being effective above 15k rpm so they developed the infamous desmodromic valve system to allow over 15k rpms. Check it out, its really cool.
Always baffles me that the springs are able to 'expand' quickly enough to keep up with the cams. You wouldn't think they'd be able to at that speed. Awesome.
espibanez1 Ah I was mistaken about the desmos valve train being pneumatic. What sort of pressures are they running to open and close valves in a purely pneumatic system? Surely a hybrid system would be more accurate from a timing perspective... Could always increase compression ratio to keep power the same and reduce the typical rpms into a more spring-and-cam friendly territory. Not like they don't have the money, I should probably read the MotoGP rules for engines
+Dany Labonte I think I actually noticed a bit as they were ramping up in speed. Particularly on the right, valve seemed to stay open for a short while. The second spring helps with that though, as both should operate at a different resonant frequency, which is a large contributor to valve float.
+DanTheSasquatch I like Ducati's solution more....just have a second rocker arm close the valve instead of a spring. You can reach way higher rpm's without valve float. Look up ducati desmodromic valves. Drawback is valve gap adjustment is a b*.
+kees ketsers Will do! I'm sure there are better solutions, bit I work in aviation and getting any "new" ideas is almost blasphemy. God help you if you actually want anything to become certified...
What's even more impressive to me when you realize how fast pistons must be moving in this engine, imagine the g-forces experienced by those engine components. Brutal.
Don’t let this distract you from the fact that Hector is going to be running three Honda civics with spoon engines, and on top of that, he just went into Harry’s and bought three t66 turbos with nos, and a motec exhaust system.
It's so cool. You can actually see the scrubbing action taking place as the valve and spring train turn. Very, very cool. I too, kept feeling like it was gonna blow up my screen. Weird sensation. But, normal for these things. Mind bending.
when and if you do get valve float it acts like a limiter, and the engine will not achieve higher rpm. Dependent on the deck to seat distance, sometimes you do have valve incident (valves hitting the top of the piston), but usually, the torque curve is such, that a trained driver, builder or someone who understands red line on a tach WILL NOT take a motor to the point that it floats the valves,
Those things are taking such strain with the engine revving higher than modern day Formula One cars (they currently do about 12,000rpm in their current spec) it astounds me that they don’t just blow off at that speed
So many of these comments mistakenly believe this is showing a car engine lol, this is normal for sport bikes (but still an incredible feat of engineering)
LeGronk Hell no!! I wanted to go run behind some furniture. It doesn't seem possible. And just when you think it can't go faster...it goes faster !!! Incredible!!!!!!!!!!!
Felix Arvid Ulf Kjellberg I got the blue screen of death weeks ago and now it’s completely fried. Stupid piece of junk! Well.. I’m done with that windows10 and now I’m using my windows7 from 2012. I feel like a kid again! They just don’t make them like they used to
Datsun 100a yeah man true. I hackintoshed my 2017 dell inspiron 15 3000 series laptop. MacOS Catalina runs better than windows 10 on my laptop. Though it takes 10 minutes to boot up with my 5400 RPM 1TB Toshiba HDD and a ~2 GHz i3 7th gen processor. Intel CPUs these days are overpriced crap
3 года назад
@@datsun100a3 Ive been using Windows 7 all the way thru... You cant make me downgrade!
I’m not sure how to explain this if you’re gonna be stubborn, I’ve seen people smack valves at 7000rpm. I’ve seen bikes that rev to 16000 rpm. I said a lot of times. Not all cars, learn how to read مضر زهاء
Nobody: Me: presssing 6 8 7 9 on the numeric keyboard to make music 6 1:59 8 2:39 7 2:19 9 2:59 Ps.: I will be uplading my own songs & music vids soon. A subscribe is very much appreciated ♥ (lol am I promoting myself over a motor vid? this shi got 7 fkn million views tho) Music is timeless ♥ EDIT: Please share your tabs lol
Kinda. The valve seat wears out, so the valve tries to go deeper into the guide until it's up against the cam constantly and the valve never closes. On a low RPM engine, it just makes it hard to start and it doesn't run quite so perfectly. On a high RPM engine, the stem concentrates its force on the center of the valve bucket and can split it. Head is toast. Another more common problem is the poor clearance makes the valve resonate and it eventually breaks off. Engine is toast. Look up "Dropped valve."
The rebound of springs just amazes me. Watching a automatic gun fire and knowing the springs are moving that fast is impressive enough. This video just blow my mind that those valve springs can preform like that.
Wow that is intense. It is amazing the forces inside a modern motor. It's also the level of engineering it took to get valve trains to rev this fast. As fast as those cams are spinning the crank is going twice as fast. You can see why pushrod motors can never go this fast. Those springs are bouncing all around and spinning and everything, and the wear on the cams is a lot too. This is why diesels last so much longer. The lubrication system has to be so intense too. That is just crazy.
@@gummel82 , humans could not have improved engines or technologies with that attitude. There are actually many things happening at that rpm that may behave differently than at lower rpm; one of the uses of high rpm camera in here is to observe exactly what rpm valves start to float at.
I was already in a plank position because I was working out when I watched this. I didn't notice that 3 minutes and 20 seconds have passed because this is too good to watch and hear. 😅
@Oggy Umm.. didn't the spring need to be hard enough to prevent floating at high rpm? And how did you open the valve in your engine with your thumb? Even when I was using the right tool to push the spring out, I still have the difficulty to push it out.
I love how the springs slowly being turning in unison around 1:37. Also those springs are amazing, at that rate one would expect skips or miss beats but they rebound with such speed.
My idle speed is just around 600rpm, I dont rev at stop lights. Even acceleration only goes up to 2000rpm to save gas. My bike can go up to 14000rpm too but that's just when I feel like doing so. I hope transparent engines becomes a thing, I'd watch that more than my infotainment!
@@kendelion Have you seen this vid? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-jdW1t8r8qYc.html It's a one-cyl ICE with a see-through head. Very cool stuff.
It's amazing to think that the only thing stopping the cam lobes from grinding themselves completely to shit are those droplets of engine oil that get splattered around the rocker boxes. Unreal.
From the moment I understood the weakness of my flesh, it disgusted me. I craved the strength and certainty of steel. I aspired to the purity of the blessed Machine.
