Why Are Forged Pistons So Strong?

[@ncspurgin6644]

Coming from a polymer/material scientist, this is a great simplified explanation, love it! Only thing I can knock it for is the use of "silicone" vs "silicon," two VERY different things.

[@prod_zy]

bro the metal silicone sheriff

[@TheWolvesCurse]

@@prod_zy Si is a metalloid, not a metal.

[@andreicoronel2829]

@@prod_zy the silica coneussiur

[@trumanhw]

The only bummer was in the end ... he used completely different orientations on the pistons to compare their relative strengths. :-/

[@trulyinfamous]

Silicone is in breast implants, silicon makes your computer work.

[@nicknogalo1535]

Guys, I’m a mechanical engineer at a fully integrated steel mill in Ontario. Real recognizes real and this is some of your best work. Absolutely awesome lecture.

[@austinseneca2661]

Frizzle is operating on a level I was not prepared for.

[@rita25y.o-checkmyvideo79]

and when you are going😇🤬🤮🤧🤢🤕🤒

[@rita25y.o-checkmyvideo79]

I believe, too, that you do🥪🌭🍕🍟🍔🥓🍗

[@rita25y.o-checkmyvideo79]

was nothing that she would 🙄🤗😍😄

[@Mediamike]

3:43 Donut needs to sponsor this man a new watch

[@faizalavi5065]

Saw this comment and still wasnt prepared for it.

[@halimkbas2883]

I am a materials scientist with a PhD. Most KZbin videos you watch these days are haphazardly prepared and are supported by superficial research efforts. This video, although not very deep in content, is absolutely flawless in explaining the engineering principles. I watch Donut as a comedy show but I also learn a great deal about cars etc. Thank you guys for your service to everybody who likes to learn more about engineering.

[@shinrezel4627]

This video hereby confirms the existence of the Jerryverse

[@antontaylor4530]

The jerrymatrix has you.

[@itsdokko2990]

the Jerry-Lore goes deep.... ʲᵘˢᵗ ˡᶦᵏᵉ ʸᵒᵘʳ ᵐᵒᵐ

[@jeromereinhart4946]

Jerry and mr frizzle is the new loki and silvie

[@kublenator]

Bro what's with these comments lol

[@SoadAddict91]

@@kublenator The sex bots? Eh, they're always commenting goofy shit here.

[@InagakiWataru]

the first 2 years of my college life compressed into less that 20 minutes without losing a single bit of understanding on the material science

[@13geeky]

The amount of effort put into this episode was very appreciated. Loved the lesson too, thumbs up as always!

[@Shane_Bedard]

Mechanical engineer here, I love that Donut is taking concepts I had to learn in college and making it easy to digest. Materials Science is pretty dope, obviously. Keep it up dudes

[@oddmanout1807]

Definitely an episode that's deserves to be watched more than once.

[@nuclearwinter21]

It’s a collab between 2 legends. 💚

[@whollymindless]

There is certainly a lot of meat in this episode. Glad to know the actual difference - sure explains the pricing.

[@whollymindless]

@@nuclearwinter21 Donut and Frizzle or Donut and the Hydraulic Press Channel?

[@SilentMovements305]

Minus the homosexuality agenda

[@csr801996]

665 likes had to add one more

[@mackenzieclements7593]

I'm in a material science class for my engineering degree right now and this makes more sense than my professor explaining grain structure.

[@dylanneff8338]

This is the same reason why diamond is so strong, while also being made of the same material your pencil led is. It's the alignment and structure of the carbon atoms that give the diamond its strength.

[@tiagopereira8340]

Not to mention, a pencil led is very dark while diamonds are shiny and somwhat transparent. They both are made of carbon but the atom arrangement changed a lot of properties.

[@alexalfonso100]

Led ? I thought pencils where made with Graphite and diamond Made of carbon

[@giulioposenato9332]

@@alexalfonso100 indeed graphite is made of carbon. And a single layer of carbon is called graphene, which has quite good capability of conducting electric current.

[@alexalfonso100]

@@giulioposenato9332 thanks English is my second language so i was a bit confused to be honest

[@tiagopereira8340]

@@alexalfonso100 graphite is made of carbon :)

[@mynamedoesntmatter9013]

“While preventing oil from escaping into the combustion chamber” GM Vortec: lmao

[@landynr2105]

🤣

[@dr_skipwith]

The Mr. Frizzle bit had me feeling like I was watching KVIE. Well done.

[@123itstheducky]

You becoming a car channel now?

[@garrettjohnson6896]

Ayy doctor skipwith here!

[@beanerwitbeamer46]

Wasss upp

[@thatguy5245]

Looks like “Frizzle” brings all the girlbots to the yard

[@wbdharris]

Made possible by viewers like you!

[@jordanlatta]

If you look closely at the forged piston at the end when it gets split open, you can see that the grain structure is a little different near the surface of the part. Since it's pressed into a die at high pressure, it forms a sort of crust on the outside that is very strong.

[@olejeffrey]

Grain structures are too fine to be seen by eye, particularly for a forged component. You mean the fracture surface of the split open piece relative to the point where it reaches the edge?

[@lich5169]

This dude is the only person I can watch change into random different characters all the time and take anything they’re telling me seriously.

[@davidcazares7441]

This is a really thoughtful and inciteful comment section!

[@Aogamii]

@@davidcazares7441 LMAO

[@EricJh21690]

@@davidcazares7441 precisely my thoughts

[@t-arrs2865]

F for this Bros comment section

[@sunnyblumen3807]

Loved the Magic Schoolbus throwback!! Tbh really wanting to see pressing force required to squash the piston from the bottom like he did to the billet, but compare all 3

[@johnnyflashtattoo]

They should have done them both the same way.

[@jepistonsvideos]

Awesome job on this video, Donut crew! Thank you for the opportunity to be involved 🤜🤛

[@kailebgaylord9545]

I never realized how fun it is to watch someone talk about things you're really knowledgeable about/interested in

[@motobikemike914]

JerBear is rapidly approaching James-level entertainment levels while still being the smartest of the hosts. Well done.

[@Cha2314]

I came to the comments to acknowledge him myself.

[@billballin6948]

No he isn’t. BRING BACK BART!!!!!!!!!

[@billballin6948]

WE DEMAND BART BACK!!!!!!!!!!

[@Cha2314]

@@billballin6948 who is we

[@billballin6948]

@@Cha2314 me and all the other people with good taste…..

[@TheBajamin]

I recently passed my level 3s in NDT, feel like watching this video when I first started studying would have helped on the Materials and Process section. Great vid.

[@bruhbutton4520]

Jeremiah is so good at explaining. Probably my favorite host (plus he’s hilarious)

[@loganwade6581]

Honestly he’s been my favorite since he has come on

[@RSpracticalshooting]

It's a toss up for me between him and James. Nolan is also really cool. Honestly all the Donut guys are cool, love this channel and love the Past Gas podcast.

[@bruhbutton4520]

@@RSpracticalshooting Yup they’re all great! Just particularly love Jeremiah and his way to get a point across and still be funny about it.

[@jerkopatrik]

@@RSpracticalshooting Zach is also amazing. Every host is great on Donut

[@ghostpro1293]

Zach is the best.

[@Titot182]

Metallurgy in a nutshell - job done! I did a materials engineering degree with automotive engineering about 15 years ago. You explained it so simplistically in 20 minutes, in what took a 6 week module to do.

[@blautens]

Impressive editing, guys. Well done.

[@maglev_]

Awesome job by the editing team this episode’s effects and transitions were really impressive along with the seamless way that clips are stitched together for jerbears characters. Very entertaining and informative at the same time.

[@vug7576]

I knew it, ever since I saw JerBear in his first episode I knew his characters would make him shine! Mr. Frizzle is the best had me in stitches

[@aljaberhk]

@@mayshinshizumi6053 no

[@MrsAlott]

"As you can see... the main pancake part of the piston is still ok" Lol metallurgy go BRR

[@raisulshaque]

I never thought I'd get a lecture on material science after I finished my engineering degree. Appreciate the video!

[@gregkappel5888]

Should have had during the degree, shouldn't it? 🤔🤔🤔

[@raisulshaque]

@@gregkappel5888 yep!

[@gregkappel5888]

@@raisulshaque hehehe I studied engeneering as well 😬😅 Nice video, isn't it... I was just trying to be funny. 💪💪

[@rahimislam7164]

How was the engineering degree I'm thinking of doing automotive engineering in 2 years time or mechanical

[@raisulshaque]

@@rahimislam7164 I'm a UX designer now so I am probably not the person you should ask about this stuff :3

[@JanBinnendijk]

nice video.. another benefit of forged pistons is that there is no cutting through the grains, all grains remain intact.. that is what makes them stronger, and that's also why tools like spanners and wrenches are made the same way. Material science is one of the hardest subjects in engineering studies, but one of the most fascinating.. i really liked it when i was still in school...

[@AngryMonkeyza]

I'm actually doing material science this semester in my engineering degree, and this video actually helps me understand some of the things I learnt. Love the B2B series because it teaches me more about cars and helps with my degree 😂

[@charlesmatlock2177]

Good video, explains some stuff well. I am a metallurgical engineer so I really appreciate it when people bring my expertise into the mainstream. If you are really interested in learning more, definitely start looking into other explanations since these are super simplified.

[@airmasterk5337]

I think I finally understand how all the components of the engine interact. Took me long enough

[@abhishakedas]

This is so much more effort than was needed, and I appreciate the extra work. Love from Mumbai.

[@Kataru.]

The only channel to make sponsored segments not only bearable but fun to watch! “Keeps” up the good work! 👍

[@ol_smokey9370]

Im a diehard Mustang guy but I love everything about Jerry's Catfish, including the bitchin' CD trapper keeper. Thats a flashback to highschool in the mid 2000s for me.

[@cereal_dispenser]

This is very high quality props to editors

[@mmmbetter55]

AWESOME to see y'all collaborating with HPC, been watching them for years ♥️

[@thegreatcambino7046]

Mr. Frizzle is my new second favorite. Right behind James's audience member

[@danielnelson4881]

@@parma-sean MO POWA BABEH!

[@thegreatcambino7046]

@@parma-seanMO POWA BABEH!

[@tjeremiah9747]

I wish my teachers were this passionate and fun about the topics they were supposed to teach us at engineering school ..

[@fastinradfordable]

Yea maybe I would have stayed in the program.

[@ericbrizes7995]

Jerry, its silicon, not silicone. Good work. Love the materials science.

[@st3althyone]

Damn you, you beat me to it. 🤛🏼

[@danielhandika8767]

That's English for ye

[@danielnelson4881]

I was gonna say... You mix *boobs* in with the aluminum and whatnot to make the alloy that engine blocks are made out of? I'll be damned... boobs.. who'da thunk.

[@aashisheapen8230]

People might wonder why the piston needs implants. Does the piston not think it's perfect just the way it is?

[@the-mighty-taco]

Heard him say it, ctrl + f'd to the comments. glad someone caught it.

[@chadp363]

Grain boundaries, space lattice structures, and the thermal dynamics that effect them.....thank you for nerding out for me today uncle Jerry

[@gabeshaw3721]

This video taught me more than my university engineering materials class.

[@sandertanav6084]

Same here mate

[@MrCTruck]

Then you're not fucking paying attention or asking the right questions, if you don't get out of college what you paid for, that's on you bro

[@rogerdonaldson3080]

lol

[@brendanboozer3802]

@@MrCTruck I just happened to have a professor with a really bad language barrier lol

[@neeljavia2965]

@@MrCTruck He's kidding

[@Followthelemming]

Highest replay value episode so far. Thanks!

[@CrashRacknShoot]

DUDE HELL YEAH! That Twista CD was a staple in every CD book, ever.

[@rocketkinger2506]

I’m a metallurgist at SpaceX. I’m impressed this is fairly accurate. You guys tend to be off a bit. Nicely done.

[@jyminewtron1416]

As a Floridian I can say that Mr frizzle is real...

[@codyparker679]

Mr frizzle just nailed me and my friends in florida and I feel attacked and flattered

[@MiracleMAX]

Great job as usual Jerry. I include a few of your videos teaching my automotive apprentices in class. One small point of clarification 3.37 While cranking pressure would be about 150 PSI on a standard engine, running compression at idle should be 50-75 PSI (about half cranking compression). Snap throttle compression should be about 80% of cranking compression. This is due to the limited time that a running engine has to build compression. Strange but true! 😉 Using an in cylinder pressure transducer with a Picoscope is a fantastic way to see the pressures change and valve opening, closing as well as overlap in a running engine. But, you can still do this test using a compression gauge with the Schrader valve removed in one cylinder with the engine running. After listening carefully to what you said (DUH), you stated peak cylinder pressures, which is different from what I was talking about......... Thanks again for an informative video. Cheers! 😊

[@juanflores-zy6kj]

I love learning about cars with these very creative videos.

[@skrimper]

Same, gives me confidence when I'm working on a car and have to jew-rig something. If these madlads can do it so can we

[@sebastianandres99]

I love how quality content keeps going up and up here at Donut, love and support for you guys!

[@ABurk2]

Have some forged JE Pistons going in my LTG Malibu next month so this was perfect timing!

[@joshuagibson2520]

Who builds and LTG Malibu? Lol. You race it, or?

[@ABurk2]

@@joshuagibson2520 no but I did blow a ring on cyl 4. Compression tested at 75psi lololol. And the stock pistons are trash so I’m throwing some forged in. The FWD platform doesn’t have much potential but I’m tuned, exhaust, intake and some other little things and it makes it pretty damn fun. The LTG camaro and ATS on the other hand are wild. Fastest LTGs are like a 10.5 and 11.2 in the quarter. The 11.2 camaro lives in the same town as me in Iowa.

[@joshuagibson2520]

@@ABurk2 hell yeah. When I was racing in the late 90s and early 2ks, you'd see an occasional built Beretta or other car you'd never expect to see. I kinda like the weird shit like that. I'm Fbody (camaro) for life, but let's face it. They're boring and everyone has one. Same with Foxbodys. All cars can benefit from the upgrades you listed and also be a ton of fun. We don't all have to be running 10 and 11 second quarter miles to enjoy the hobby. I hope you get some enjoyment out of yours for years to come.

[@ABurk2]

@@joshuagibson2520 that’s man I definitely will! I love a good sleeper🤘🏼 my previous car was a 97 Regal GS (SC 3800) and was so damn fun but slow as hell even with a run and intake. Even slower after I threw a rod!

[@leadengineer4105]

This is like my favorite B2B so far, and I LOVE B2B!!!!

[@chrish1850]

Everyone just got a metallurgy lesson. I work with customers who do this stuff everyday. Very cool stuff! Great video.

[@pyroVoid]

The music jamming in the background around 12:00 is absolutely fire

[@Blown4banger]

As a catfish owner myself, I was stoked to see a catfish so prominently featured in this episode!

[@gauravm.]

Dude, the editing skills are God level. What are you guys doing on YT! You guys deserve a show on Prime or Netflix.

[@charlesschwab7651]

I wish he had smashed the forged piston in the same orientation as the billet and cast piston so we could have a legitimate comparison. B2B although no longer what it once was is my favorite show on the internet. Well done folks.

[@stolas666]

Happy to see this channel doesn't shy away from complex themes and technical explanations.

[@filipkotlaja8697]

Mr. Frizzle had me blankly staring at the screen for a lot longer than i would like to admit.

[@OmarHernandez-se6fm]

Man, so much good explaining and information, great production and the confirming of the Jerryverse Nice Job Donut! Love your channel

[@dannymac6368]

Really going for that creepy cousin look, huh? 😂 Killin’ it.

[@notfunny3397]

Don't bully my boy

[@lucaslindseyJESUSBOY]

Danny do you understand Jesus Gospel?

[@zooyork93]

One of the best one episode. Jeremiah got the flow! Great narator and a real passionate guy! Want him at my birthday party 🥳

[@hawkeallen1319]

Yo! Stoked on this vid. Can we also get an up to speed on ams please?

[@BeagleBageler]

Hi bots ;)

[@Ang3lUki]

I loved the magic camaro ride haha, the car boundary layer analogy was great too, what a well presented video :) I also am glad you made it clear that billet pistons aren't always the best choice. Billet pistons mostly are for more specialized piston designs that larger manufacturers aren't making forged, because it's easy for an engineer to submit a billet design to any small machine shop and get it done in a matter of days to weeks.

[@viktorbalko213]

Okay Donut videos have officially reached the elite level. This was a masterpiece

[@Imjeezus]

Very interesting. Can’t wait to forget half of this and rewatch this in a couple months as if I’ve never seen it👍

[@bearhug_jaykk]

Always a good episode when you have a foreign dude with a cool accent.

[@kimreinikainen]

Finnish accent is quite funny.

[@bedbomber3531]

@@kimreinikainen yes

[@franciscoalanis8202]

Episodes keep getting better and better

[@shauryarawat3187]

Question for Jeremiah: what would be stronger, a cast titanium piston or a forged iron one

[@adrianolacerda3410]

titanium isnt good for pistons, thats why it isnt used

[@savagetuner2404]

Forged because titanium isn’t great for pistons, they’ll crack. That’s why big turbo cars use steel exhausts instead of the prettyboy titanium stuff

[@adrianolacerda3410]

@@savagetuner2404 and friction welding is also a thing

[@savagetuner2404]

@@adrianolacerda3410 right my boy, I raised you so well. I was going for the quick 2 sec explanation but it’s always good to give some background info.

[@nine4t4]

are you serious? My background is in knife making. The metallurgy is similar. You can have a knife that holds it's edge, is easy to sharpen or is chip resistant. Titanium is super flexy, (check out the BOW-TI bike, no pivots on the frame). It does well when flex is required, but is not "hard". A Ti piston would warp quickly. It is light, which would be good for piston mass, but it's springiness is detrimental to cylinder seal. Ever see a high quality knife BLADE made out of Ti? You can do the handles but even 1095 is a better steel for knives. Planes use Ti to save weight, but a jet engine doesn't operate the same way as an ICE. Forged steel (nobody uses iron in engines anymore). I don't know the thermal values of Ti, but you'd likely be letting fuel into the crankcase.

[@ferranm14]

Loved this type of videos, I wish my Material science teacher in university was as good as B2B

[@wade7959]

When Jeremiah hit his head with the soda can, I actually laughed out loud.

[@colinhare6963]

For me it was when he roasted nolan so fluidly

[@TheBigChad]

OG Twista album is what made me like the video and share it on all platforms. Hell yeah!

[@michaelmartin7797]

I’m fairly certain I’ve seen Mr. Frizzle on “How to Catch a Predator”… lmao 😂🤣😂🤣

[@joeljeffrey9139]

Agreed. On one of those Florida episodes lololol

[@gracec5061]

I knew all this but the way he broke everything down makes it really simple

[@explodeder]

Your math for the number of power strokes per second is off by the number of banks of cylinders on the engine. if an engine is at 6000 rpm and there is a power stoke every other rotation, that’s 3000 power strokes per minute, but if there is a straight 6 with the firing order where there are 3 firing groups of cylinders, then each piston only has 1000 power strokes per minute or 16 strokes per second. That’s still amazing, but it’s not 50.

[@bakervanbv299]

That's not true, 6000 rpm means that the crank rotates 6000 time per minute, and thus each piston completes 6000 strokes, or 3000 power strokes. The number of pistons does not effect the number of power strokes from a singular piston.

[@jebus456]

The dig on Nolan was perfectly executed.

[@Akwardturtle]

Mr.Frizzle is by far the best part. Lmfao

[@lucaslindseyJESUSBOY]

Do you believe in Jesus Christ?

[@burnbibles3813]

I love how much information you get out of these

[@soontobevictor]

This ep had huge magic school bus vibes when he dived into the piston, but now for us adult car nerds

[@fpostgate]

Cheers brother, I hope you teach students! Very good metallurgical discussions.

[@knodalishell5636]

this is the best donut episode i’ve ever seen

[@berto606]

One of the best videos I've ever seen from you guys! BRAVO!

[@mitchellcameronsantos9038]

This video was such a godsend I’m rebuilding my engine and this answers so many questions

[@freakymustang268]

What kind of engine is it?

[@mitchellcameronsantos9038]

@@freakymustang268 ej205

[@freakymustang268]

@@mitchellcameronsantos9038 Cool man

[@seandempsey4507]

You explained grains better than my manufacturing lecturer so thanks! I have complete understanding now

[@lucianocasanova8924]

Pistons are like the car equivalent of your heart's ventricles

[@Simbarrr]

That is a surprisingly good analogy

[@macauleyward]

These episodes just keep getting better

[@Mr.Everything___]

So no one is going to talk about the billet and forged piston were being crushed in different positions? I really wanted to see a side by side comparison of how much force each piston could take :( , but obviously this comparison showed us nothing due to the unfair and incomparable test, that's like crushing wood against the grain vs with the grain, the outcomes would most definitely yield different results despite even using the same piece of wood.

[@eXoguti094]

Yeah what a waste of time

[@iamgroot7143]

Listening to you guys reminds me of Bill Nye the science Guy back in my elementary days. Those days I was chasing Ashley and Sally around recess time.

[@jamessizemore7103]

Fun fact that method of creating the billet stock is Called extrusion

[@ericcarabetta1161]

Two of my favorite channels doing a collab?! Awesome.

[@fatalgravity]

Never noticed Jeremiahs accent until he said "properties" lmao Edit: Donut and THPC? Best crossover ever.

[@cumminsridinhigh]

I don't hear an accent in "properties"? what do you hear?

[@fatalgravity]

@@cumminsridinhigh propahties.

[@haploguy]

Mr. Frizzle has errythang sorted out. Much needed presence.

[@bentracy7463]

Ah yes, silicone, the most underrated and misunderstood metallurgic component there is. Keep up the great content, pronunciation aside. :)

[@ILoveTinfoilHats]

7:39 caught it too. Common mistake to call silicon silicone

[@kineticstar]

I thought I was the only one that caught that. I was like I know I'm a computer engineer, but I don't think silicone is used to strengthen metal.

[@Mrluvshack]

well done taking a very complex subject and making it edutaining. Great work team!

[@christianguzman8228]

Yo, this is borderline technical. Even the crushing shows the angles of the failure pretty well. They all fail at an angle. There's a reason for this.

[@Suavemente173]

Love these series. Why don't we get B2B mechs? Make some already!!!.

[@SavageBunny1]

Forged take longer to expand, you really have to warm up your engine if not you'll get oil dilution.

[@exvils]

they dont take longer, they just expand more, so you have to use smaller pistons for same bore

[@hl5557]

Really good episode!!!!! Thank you!!

[@OmizaruHaven]

Jeremiah: "Crystal people are weird." Me, a crystal loving Donut Media fan: 🥲

[@globalautopros7769]

Danm I love the amount of effort that goes into these vids

[@sirsavagethe21st56]

Because they *forge* ahead while others get *cast* to the side. Ight I'm sorry man I had to.

[@progamer-st7sm]

@@standopowah lol

[@skippy8727]

Been subscribed to both channels for a long time! So cool to see them on the same video!