ENGINE BALANCE: Inline 3 vs. Inline 4 vs. Inline 5 vs. Inline 6

[@d4a]

Let's hang out: superpeer.com/driving4answers Support d4a: driving-4-answers-shop.fourthwall.com/ Revive the five: amzn.to/3r0ERaH Build the four: amzn.to/2KyP6Cb Read the six: amzn.to/37n8rzc I couldn't find anything for the three so you get this: amzn.to/2ITRQtD

[@reclaimerauto7359]

This is the world's rarest model rx7, ever heard of it? www.rx7club.com/2nd-generation-non-technical-pictures-198/restamped-mazda-rx7-1148475/

[@hurshpatel3575]

Question: Why are 3 cylinders for motorcycles than even 4 cylinders if they are unbalanced.

[@OzzyCPT]

I have had questions about this forever. Thanks for the easy to understand video. Please include a video for 1 to 4 rotor rotaries in the series

[@abdulabdanahib9617]

@@hurshpatel3575 motor cycle engine use crossplane crankshaft

[@millionairedieselgarage4767]

You forgot the inline 8

[@owenbassist5049]

This guy explains better than my mechanics teacher

[@trentdawg2832]

Yea this dude is legit.. ....

[@Flies2FLL]

@@trentdawg2832 He is "legit"? He has NO idea how long a power stroke lasts. Hello?

[@ACommenterOnYouTube]

Some people were NOT meant to teach. Just because you THINK you know or actually KNOW your material does not mean you can teach it or relate to it ..

[@ayoogbeide6637]

All ya teacher cares about is paycheck

[@ashleyabrahams4827]

@@Flies2FLL you obviously never paid attention.

[@TopiasSalakka]

Can't use an inline 6 in a transverse FWD application? Volvo: hold my beer

[@fila1445]

i work at shop that specializes in Volvos turns out i hate working on Volvos...

[@d4a]

Must be fun changing a belt on a transverse inline 6 😅

[@fila1445]

@@d4a its not that bad since timing chain is located over a gearbox. Changing alternator or ac compressor on the other hand...

[@d4a]

@@fila1445 I assumed they were chains, I meant the accessory or serpentine belts. I tried helping a friend with inline five in the Fiat Coupe do those belts once....we both scraped our knuckles off

[@arekb5951]

@@d4a According to wiki, Volvo calls this engine SI6 (short inline 6) and the engine itself is 1mm shorter than their previous inline 5. I'm really curious how they did it

[@keithw4920]

15 people have unbalanced engines.

[@newiqq3570]

I am one of the 15

[@Scotracer1987]

Mate. I'm a Mechanical engineer designing powertrains and this was a great summary to get my head back in the game. Love it.

[@davidblalock9945]

It’s so refreshing to have someone explaining this so clearly and correctly. Too many people who tackle engineering subjects often resort to “dumbing it down” because they just don’t think people watching will have the intelligence to understand it.

[@vulekv93]

Or use generic and uninspired explanations which carry little meaning and insight. This guy hits hammer on it's head with his presentation.

[@deusexaethera]

I think it has more to do with people who understand technical topics not knowing how to translate their understanding into non-technical terminology without losing a lot in the translation. Or to put it differently, engineers usually don't do words good.

[@tombarber8013]

Too bad he's only partially correct.

[@mihailmilev9909]

@@tombarber8013 wym?

[@ian9toes]

@@mihailmilev9909 There is an error in this video. 17:06 you say when 2 are at the top, 2 are at the bottom. This doesn’t work. If one pair alternates with another pair that leaves the 3rd pair with no alternating partner. You can even see the error in where you paused the animation, 1 and 6 are not at TDC because this animation shows TDC when the conrod big end green bearing touches the line, which it isn’t where you paused it. Another problem with what you described is if the 2 are up and 2 are down the 2 pairs of conrods/cranks cancel each out. But the other 2 in the middle have the cranks out to one side and no counter force. What is actually happening in my opinion is that when 1 and 6 are at TDC, 2,3,4, and 5 are all at the same level with the cranks of 3 and 4 off to one side and cranks of 2 and 5 off to the other side, which balances left to right. And up and down forces are balanced out by 1 and 6 cranks being at TDC and the other 4 cranks all being 30 degrees below the midway point, with one pair on the way up and the other pair on the way down.

[@arthurabraham3271]

This guy deserves a massive you tube following. Great work!

[@logancudd7030]

i was unset he only talked about a flat plane inline 4 cylinder until the end of the video

[@maneki9neko]

He is terrific isn't he?

[@technologytechniciansllc3431]

Totally agree, this is the best explanation and awesome instructor. I'm going to buy all his videos just to learn more....

[@psnmadracer27]

"And that's because this video is actually the first in a little series..." Me: *audibly* YES! Speaking of series, when can we expect the next episode of boost school?

[@d4a]

Glad you like the series, thanks for watching :) Next episode of boost school is coming likely in the first week of January, it would have been sooner but I want to cram in the Yaris GR engine video in this Sunday, so boost school is getting delayed a bit.

[@corbinyoung5320]

I'm excited for the V engines!

[@CF_Sapper]

Perfectly balanced, as all things should be.

[@juancruzmarquez5502]

cringe marvel reference, go back to reddit

[@valentinuiliqnow6198]

what about vw vr6 engine ? ? ?

[@psuls725]

,,.

[@juanordonezgalban2278]

@@valentinuiliqnow6198 as compared to the inline 6, i think you exchange packagin for a little inbalance (because now you have 3 pistons in two different planes). They also are limited in bore and the engine block stronght i think

[@richardcaldwell6159]

@@valentinuiliqnow6198 Good point. Another interesting configuration, one that I've never heard any examples of, is the 170 or so degree V. It would have almost as good balance as a Boxer but without forgoing gravity assist for the oil. The non-exact spacing of power strokes breaks up resonances while providing a bit of musicality to the engine's note. Or so I hypothesize. Maybe someone's tried it and the reality doesn't match my imagination.

[@jasonhowell7763]

I appreciate how you jumped right into the explanation, rather than leading in with an simple explanation of how engines work like a lot of channels do. Thanks. This is a really good video.

[@deusexaethera]

I pity the fool who's watching a video about the balancing of engines with various numbers of cylinders if they don't already know how an engine works.

[@bigjoetheelectrician]

Definitely want to see those can’t wait 👍🏻 18:50

[@GSXRNissan]

Straight 8 and Subaru flat 12 F1.

[@michaelallen2501]

2JZ the world. Seriously though. Ford 300 I6. Jeep 4.0L. RB series, JZ series, Barra, Cummins, BMW, Jaguar, blah blah blah. The I6 is pretty amazing. Whether you want reliability or 2500hp.

[@Nit2315]

True but it's hard to put in a compact car, it's not so good for the chassis weight/mass distribution, transmission, consumption, etc etc.

[@944play]

@@Nit2315 e30 not compact enough?

[@jackdarcy6294]

I love my M54, but "reliable" isn't in BMW's vocabulary.

[@altblechasyl_cs2093]

@@Nit2315 Do you know the 323ti or 325ti ? Let's talk about this item again after learning something about these cars. ;-)))

[@fourseven6202]

@@Nit2315 my 323ti disagrees XD

[@Lidekys]

I always knew that 6 cylinders are very smooth, but now I know why. Great vid!

[@charlesdjones1]

It's amazing that car companies don't put more emphasis on the inline 6.. Such a simple design that is easy to work on at the same time. I would think with today's tech we could build an amazingly powerful I-6 that is also efficient.

[@sujaykallamadi1515]

@@charlesdjones1 cue the B58 engine. It's truly an amazing engine when considering how efficient and how powerful the engine is. Quite an upgrade from older BMW I6 engines.

[@oranges866]

@@charlesdjones1 jaguar, mercedes, and mazda came back to it.

[@davosworks]

@@charlesdjones1 i want more Vr6 🤩

[@soaringvulture]

That's why I love my 2JZ. Best inline 6 ever made.

[@lazaros23]

Please do yamahas crossplane, hearing so much about how smooth it is, how the rider feels so connected with the throttle and how it doesn't stress the tyres. Thank you!

[@mydroidid]

Every piston is forward 90° in relation to the one before it. it would have severe primary balance problem(solved with balance shaft)but the crank will not speed up or slow down during the tdc or bdc as the speeding up is acting against the slowing down of another piston .. it gets more detailed from here but this is the basic idea.. somthing like a 90° v twin sharing the same crank pin

[@ElCachorro97]

Even 6 cylinder diesel like the 1hd from 80 series, clutters and vibrate smoother than newer toyota 2.8 diesel on Fortuner or Hilux today.

[@juanordonezgalban2278]

That's just phisics jajaja

[@bakatzen6243]

straight six is just that good

[@guillaumegaudin694]

Diesel engines are heavier, so of course the imbalance gets amplified

[@3dule]

those 2.8 are four cylinders I believe

[@sparkie5571]

@@guillaumegaudin694 he’s comparing diesels in both scenarios.

[@eTiMaGo]

Talking about inline 3's, would you do a feature on the GR Yaris' engine? Seems like quite a firecracker!

[@d4a]

Everybody's in love with that thing, myself included. Actually a video on it is a pretty good idea. I haven't dug yet but I don't know how much info is released when it comes to the engine. I need to go beyond the basics and hp and torque figures. Imma go look now, I just got super curious. Update: Vid is happening! Thank you for the idea.

[@daurysd8402]

@@d4a cam you splain how vacuum work like in the intake manifold vacuum lines

[@ENGINERESCUE86]

I look forward to the rotary engine explanation since I'm sure you will cover it. I learned a lot today, thanks D4A

[@jakubzidek]

IMMA TELL YOU ANYWAY

[@technologytechniciansllc3431]

That is what I wanted to see explained in inline to v explanation. Want to see even if completely useless for me, but addicted to this instruction...

[@epiploon79]

It’s a 6 cyl video! Perfectly balanced!

[@user-bo8yt4uc8b]

Great video 👍👍👍 Can’t wait for the same stuff for V engines with different cylinder bank angles and different kind of crank angle applications.

[@arconeagain]

And V3s and V5s.

[@Profect72]

Oh and i was having a bad time understanding secondary balances this last week and then you show up, you've read my mind Thank you for sharing such amazing content

[@Proefkonijntje]

Same for me! I was just thinking about posting a comment on this channel to ask for a video about engine balance. Not necessary, this guy reads our minds... My gratitude is eternal. :)

[@ProjectCarTV]

I'm going to replace my 6.0L LS2 in my 2004 Chevy Trailblazer SS for the 1.3L 3cyl turbo in the 2021 Chevy Trailblazer. I'd like to save money at the gas pump. - said nobody

[@attesaawdlife8115]

Six in a row is the way to go :)

[@dennisseuferling815]

"You just cant hate a perfectly balanced engine" Someone forgot to tell Jeep that. I wish they kept the 4.0L even if was a non-standard option.

[@junkdubious]

AMC did Chrysler doesn't care.

[@andrewjackson9853]

I put a 5 cylinder Mercedes in my CJ...

[@mpetersen6]

When the Wrangler got redsigned around 2006 the 4.0 didnt fit anything. Plus the engine needed a major redesign, new head etc.

[@trevorcalhoun4530]

The straight eight is another well balanced engine and one I have always liked.

[@camarocharger8180]

You are the modern day Engineering Explained, I remember watching his videos learning about engines in his dimly lit room with a white board back then, now you just explained it so perfectly. I just love watching every video you share, can't wait for more on this.

[@jackdarcy6294]

can't wait for a vid on V configurations. curious to see if V8 dampens secondary imbalance in inline 4, and to hear how a V12 is just two inline 6s duct taped together.

[@cipher2508]

One of the most UNDERRATED channels I've ever seen I'm seriously looking forward to this balance series man Love your work BTW, if it isn't too much too ask, can you also cover different firing orders please? Thanx a lot D4A

[@warp.routine]

For all those opining the most well-known transverse 6 (Volvo), this is only possible because aisin managed to cram a 6-Speed auto Gearbox into a space narrower than the clearance for most manual units... Very impressive.

[@thatclintguy]

Aisin is completely underrated. Toyota spinoff with global reach

[@bennetteberle4476]

Is there any reason they couldn't put the transmission/transaxle in front of or behind the engine motorcycle style instead of on one end of the engine? A geared power takeoff from the center of the crank would make crankshaft torsional vibration less of an issue to boot.

[@rosiehawtrey]

@@bennetteberle4476 They did that on aero engines to shorten the length - putting ancillary drives in the middle of the block - would be be very good for the I6 in FWD.

[@bennetteberle4476]

@@rosiehawtrey Honda did that with the transverse I-6 in their CBX motorcycle. A chain drive from the middle of the crank to a jackshaft that drove the clutch. They introduced that bike in 1978 and discontinued it in 1982. It's now a sought-after collector's item.

[@snap_oversteer]

No mention of 'your' inline 7 3JZ? :D

[@КлиментЦонков]

Same as the inline five, but with even less relevant primary imbalance, I suppose. I actually hope I hear a automobile inline 7 before i die, because they would sound awesome.

[@ENGINERESCUE86]

The original photoshopped 3jz was an inline 8. However, I have read that Toyota will unveil the 3jz engine as a twin turbo 4.0L v8

[@philljustphill1656]

@@ENGINERESCUE86 wtf? that's awesom

[@ENGINERESCUE86]

@@philljustphill1656 yeah go do a Google image search for 3jz, and there were also a few articles about a v8 3jz.

[@bakatzen6243]

@@ENGINERESCUE86 why dont toyota put that engine under UZ family?

[@danronck3636]

I just LOOOOVEEE those freaking I6 engines, just soo beautiful🥲🥰🥰🥰

[@taylorkingrealestate2053]

I really appreciate these videos. Wanna see a fascinating engine? Check out the V4 in the VFR1200. I owned one, it was awesome. The phasing and balance was a marvel of engineering.

[@elitedavidhorne8494]

Looking forward to you covering engine balance in V6 engines. My place of work has just started to to produce V6 engines after building nothing but V8s. The V6 engines have a balance shaft fitted.

[@juanordonezgalban2278]

I can't wait for him to trash talk on 90° V6s

[@lillyalriachy3357]

Thank you for the extremely informative videos.

[@domantas8185]

This mans really do be teaching me theoretical engineering degree knowledge doe.

[@RayMorgenstern]

Every time someone sees my i3 Polo engine doing it's Macarena thing in the bay, it seems weird to them. I'll just reference this video from now on. Great video!

[@4BillC]

I was definitely curious about the cross plane I4. I do however have an I5. It is a really smooth engine!

[@4BillC]

@Yuck Foutube it is, and I honestly really do like a 5 cylinder engine. Unfortunately mine is in a 4700lb truck, according to the local scrap yard scale, and with a stock 220hp and about that much torque... She's a little on the slow side.

[@88SC]

This is a fun topic, and I learned some new things. The longitudinal rocking is new to me, but it reminds me of issues that aircraft engine manufacturers encountered in the late 1930s with double row radial engines. On a big radial, one cylinder has a (sort of) conventional connecting rod that is connected to the crank pin. The rest are connected to that with pins that are not concentric to the crank pin. So when the rod makes the pendulum motion that you described, the pistons, with their “link” rods tend to wrap slightly, causing them all to undergo different acceleration rates throughout the stroke of the main rod. The result is a small circular motion of the entire engine, where the cylinder centerlines remain on their static plane. If the engine has seven cylinders, the motion is nearly negligible, but with nine it’s a bit more severe. For single row engine, it’s not a problem, but if it’s a double row (eighteen cylinders), big problem! With that configuration, the two crank pins are 180° apart, like bicycle pedals. The circular motion, phased 180° apart, resulted in a wobbling motion of the whole engine, that attempted to constantly change the plane of rotation of the propeller. Watch out prop shaft and main bearings! The fix was to employ two sets of second order balances, rotating at twice crankshaft speed. This is what it took Pratt and Whitney and Wright to cross the 2,000 HP threshold, just in time for WWII Corsairs, Hellcats and others.

[@rushnerd]

When I picked up my 88' Supra last week I wasn't super excited it "only" had a 6-cyn engine and it wasn't even a V-6. Now I absolutely adore the design and realized it's way better than what is on most cars. I didn't even realize before I picked the car up that all the cylinders were lined up in a row! Talk about a massive and perfectly balanced engine!

[@desertrainfrog1691]

This is how so many people think. "If it's not a V8, it's gutless" - My friend when talking about a twin turbo V6 that makes 2x the power of their V8.

[@robsycko]

Don't leave out opposed piston.

[@kaushikkalita7310]

if inline 6 has perfectly balanced primary and secondary forces then why do inline 6 engines have counterweights on the crankshaft, please reply

[@lucasvanhamburg4937]

100IQ moment

[@d4a]

Counterweights in many cases only balance out the opposing rod journal and part of the rod (mostly just the big end). But on engines like some inline 3, inline 5 or crossplane v8 (notice the very large counterweights) they also balance out the mass of some of the pistons and rods.

[@kaushikkalita7310]

@@d4a thanks bro, this is my favorite youtube channel, thanks for answering my question, now i am a smarter petrol head thanks to you.

[@jozsefizsak]

It's so great that you're doing this. While I always enjoyed the humour that you often added to your dissertations, I'm not complaining because I so appreciate your efforts that I'm content to have these in whatever style you most enjoy producing. Thank you so much!

[@d4a]

I definitely want to act stupid again, but somehow there's so many of these topics that I want to cover and I end up getting lost in trying to present them the best way that I can so I just forget about the humour 😔

[@tomop5603]

This channel and mighty car mods are my all time youtube favourites!!!

[@fhwolthuis]

Very interesting! Of course British Leyland and Volvo had front wheel drive with inline transversely mounted 6 cilinder engines.

[@gaspuppygarage3782]

I'm looking forward to this series. Would be sweet to see you explain an inline 8 though. I know its uncommon but legend has it they were so smooth you could put a coin sideways on it and it wouldn't fall over!

[@casemodder89]

Thats for I6. After I6 it cant get much better. Everything else is just 2 times I3 vor a V6 or 2x I4 for V8, 2x I6 for a V12 and so on. More cyclinders result in more low end ooomph, but primary and secondarys still stay about the same. In V configs the engine also rocks a bit sideways around the crankshaft. B4 and B6 are about perfekt, because piston/conrod masses cancel each other out over the mirrored design.

[@JViello]

@@casemodder89 Wellll....Kind of. There are two V8 engines. Cross plane, and flat plane. Cross planes are much smoother IMO and have no I4 counterpart aside from Yamaha's R1. Something similar is also possible in the V6 world, but aside from the Alfa Romeo's BEAST of a V6, I don't know of any other "oddball" V6 engines that don't mimic an I3. I think maybe the early Buick 3.8 V6 did so but then they switched to offset crank pins.

[@Mrgoodnyt]

Excellent video mate very clear and easy to understand! looking forward to more. This channel is so underrated.

[@uhyeahitsme413]

I love my inline 6's

[@TwoLotus2]

And they can sound nice too.

[@eyemastervideo]

Well just wow, this is amazing. While I understood a little bit of this before, never have I seen a better display of primary and secondary imbalances, including the piston speeds effects. If not done already, can you do the same with V and W configuration engines? This is simply an amazing explanation. Thank you!

[@rampentpanda]

nice video, looking forward to motorcycle engines!

[@bobmcgrewjr778]

I know they''re rare these days but what about the inline 8?

[@geoffmooregm]

They balance just like an I6 but actually feel smoother under load because there are more power pulses per rev. The biggest draw back is their length and because of that they have a bit more torsional bending then your typical V8 or I6.

[@bobmcgrewjr778]

@@geoffmooregm That's what I figured. I bet they make a lot of low end torque.

[@geoffmooregm]

@@bobmcgrewjr778 Check out the Hagerty channel they have just finished a Buick I8 build.

[@electric7487]

Many marine Diesel engines used in marine propulsion or power generation are offered in inline 8 versions.

[@richardjessop6029]

This guy got me proud of owning an inline six

[@corey8704]

Engine designers: Nooo you can't have a rough idle it is inefficient!! Hot rodders: Haha Cams go woogity woogity.

[@BMGaming99]

Don't forgot about VR6 😁

[@guzforce]

One of the Best videos and summarized "document" ever made on KZbin! Thank you so much for such a great video! One thing that I love on my 6 cyl. Valkyrie, motorcycle engine is the $0.25cents coin trick, (kzbin.info/www/bejne/an_Cg2eYl5tmotE). Another point that I would really like to see is the Bore X Stroke "reasons why" vibration X RPM, average piston speed limits (like 96mm stroke, pistons speed become dangerous after ~6500rpm). I can not wait for the upcoming videos on this series!

[@SamiKhan-hn3uk]

Who needs university when you can learn all you need from D4A

[@stevealexR1]

I much prefer the smoothness of my current U.K.-spec 2018 BMW440i’s straight six compared to the V6s I had in my previous cars since 2012 (2012 Mercedes C350, 2015 Mercedes E400 Cabriolet, 2016 Jaguar XE-S 3.0 Supercharged [rejected after four months as was so unreliable and poorly built especially its InControl Touch Pro infotainment system] 2016 Mercedes AMG C43 Coupe and 2017 Audi S5 3.0 Coupe). I must love the BMW as I’ve kept it for nearly three years whereas all the other cars, except the Mercedes C350 CGI, I only kept between 4 months and 1 year!

[@chaselandry2962]

Motorcycle engines are fun. They still play around with crank angles, v4, and big bang firing order

[@luxuryviplifestyle9494]

Trillions like and best comment for you because you are best on Earth and follower respect you,we need videos in Real 120fps FullHD ,4K,8K and Sound in FullHD 3D

[@GaurdianAzzar]

A LOT of information in this video. I like the way you explained secondary imbalances. That is something I've struggled to wrap me head around for a long time. Looking forward to the rest in the series.

[@bence.gabor.slezak]

A couple honourable mentions Triumph three cylinder and Yamaha cross plane four cylinder in the 2009 YZF-R1.I just got to the end of the video where the cross plane i4 was mentioned. I feel a bit dumb now.

[@JazzbLu]

I never knew that the piston speed is faster at the top than the bottom. I thank you again for sharing your knowledge! I love your videos!

[@aeroe2144]

You should cover rotary engines ,piston type not wankel , with fixed crank and opposite rotation crank (sh.III). W engines aswell, H engines. And opposed piston (not opposed cylinder). Maybe radials too.

[@tombarber8013]

The mathematical approach to vibrational motion is harmonic analysis, where the vibrational motion is represented by an infinite series of pure sinusoid terms starting (the fundamental) at frequency the same as the crankshaft rotational frequency. Then 2x that frequency, then 3x that frequency, and so on. "Primary balance" refers to the case where there is no vibrational motion component at the 1st order, i.e., no vibration at frequency the same as the crankshaft's rotational frequency. The primary example of an engine that has perfect primary balance but that lacks perfect secondary balance is the in-line four using the flat 180-degree crankshaft. With this engine, there is no vibrational motion at the crankshaft's rotational frequency. There is no rectilinear motion (back and forth in a straight line) at this fundamental frequency, and no rotational motion (end-over-end rocking motion) at this frequency. The two pairs of pistons (the inner pair and the outer pair) do not generally move at the same speed (because one pair is in the lower part of the stroke and the other pair is in the upper part of the stroke), which means that the momentum in one direction does not perfectly cancel with the momentum in the other direction. The aggregate piston mass thus exhibits rectilinear vibrational motion at frequency starting at 2x the crankshaft rotational frequency. As such, the inline four has perfect primary balance (because there is no vibrational motion of any sort at the crankshaft's rotational frequency), but it does not have perfect secondary balance (because there is vibrational motion at frequencies that are integer multiples of the crankshaft's rotational frequency). The reason the lowest frequency of vibrational motion in this engine is 2x the crankshaft rotational frequency is that when the two pairs of pistons pass each other near (but not exactly at) the midpoint of the stroke, the direction of motion (and direction of momentum) reverses. This occurs because the pair that was moving faster becomes the slower pair and vice versa. This is a simplified description of what actually happens, but this is close enough to explain that the direction of the rectilinear, aggregate piston momentum reverses once with each 180-degree rotation of the crank and twice with each 360-degree rotation. Therefore the lowest frequency of this rectilinear (aggregate) motion is 2x the crankshaft rotational frequency, and it is for this reason that it is considered a secondary imbalance and not primary imbalance. To make the picture more complete, consider the example of the inline triple, which is more like a boxer twin. Rectilinear vibrational motion cancels among the three pistons, however there is end-over-end rocking motion at the same frequency as crankshaft rotation, and as such, the inline triple does not achieve perfect primary balance. The same is true for the boxer twin. But if you put two inline triples end-to-end, the end-over-end rotational (rocking) motion cancels between the two halves. You end up with no rectilinear motion (at any multiple of the crankshaft rotational speed) and no end-over-end rotational motion (at any multiple of the crankshaft rotational speed). Thus, the inline six doesn't merely achieve perfect primary balance (which would make it no better than the inline four); it achieves perfect balance, primary and secondary.

[@rocketman2tm]

If you are going to make a series on engine configurations, please include radial engines. Also thank you for making these videos, I appreciate the work you put into these.

[@vladimirabadzhiev3246]

OMG ARE YOU CRAZY THERE CANT MORE BEAUTIFUL AND SMART VIDEOS. i just feel like im in another world.

[@timsmith8242]

I’ll take a good inline 6 over a v8 every time

[@Bmwguy2011]

Conclusion: buy a BMW inline 6 with an N52 as it has no turbo, no high pressure fuel pump, simple throttle valve, and remains maybe the smoothest engine made in the last 15 years.

[@blinkyd4952]

Welllllll and Inline 6 can be used as a front transversely mounted engine, it just takes someone brave enough to do it 😂, no engine swap is impossible

[@GoldenGrenadier]

With a Volvo s80, there's no engine swap required! Just a metric ton of patience if you ever want to work on a T6 engine.

[@1maico1]

The 1969 Austin Maxi had an IL6 transverse FWD engine option

[@darylmorse]

Great video. Thanks for sharing. Please take a close look at the two types of V8 flat plane crankshafts, UDUD and UDDU. Also take a look at the cross plane inline 4 yamaha racing engine.

[@Kowen8714]

One of the things I loved when owning BMWs was the i6 engine. So smooth that I'd often check if the car is running at idle. Now the i4 engines with their turbos are more efficient and more powerful, but the amount of noise (direct injection and vibrations) is really bad... Oh, and the old Audi 2.2/2.3l 10V engines made a great noise.

[@alexk3469]

Yeah but there m cars don’t have 4 cylinders faster so it just mean the six cylinders are fast

[@ps1hagrid823]

Something cool I would like to see would be motorcycle engineering. With singles, twins, and triples, parallels and V’s. Since there are many more different configurations for low cylinder engines in motorcycles, like Yamaha’s 270 degree crankshaft parallel twin, or their cross-plane inline 4.

[@d4a]

Bike engines are definitely coming in the future

[@ps1hagrid823]

@@d4a Another idea would be to look at the secondary balance of 2 strokes

[@fortitudevalance8424]

I got a Skoda Fabia with the 1.4TDi engine, it’s a 3 cyl engine and always wondered if the balancing shaft would get damaged or warp over time.

[@d4a]

No reason for it to get damaged under normal operating conditions. Enjoy your engine 😊 I drove a rental car with that engine for a week, I couldn't believe how low the fuel consumption was.

[@tahcogunworks]

Excellent video.

[@ViperDent]

It'll be fantastic if you cover some odd/uncommon piston engines like Radials, VR, W, X, U, H, Delta, Opposed, Inline 7, V3, etc. It'll take a while but should make a great series with clear episode goals. :)

[@cuddlepaws4423]

A joy to watch . This made my brain work on engineering geometry 😵‍💫after years of not doing it .... ouch 😉😉

[@Barnabe51Reims]

Very interesting, I love my 5 cyl even more :)

[@claudehebert3131]

Challenge: Now do the math for a Napier Deltic or for a P&W R-4360 Wasp Major ;-)

[@Basti11121988]

Ask Volvo about in-line 6 fwd

[@drtm1718]

Those S80s are turbo'd too. 😮

[@hazard5565]

@@drtm1718 Got that dubble turbo mini RB26/2JZ thing going on in those S80s

[@snoofayy6150]

look up the Daewoo FWD inline six, transverse and they had Porsche help engineer it

[@owaisahmed1109]

Question: why does an inline 4 has its pistons arranged in pairs that is 180 degrees for frontal crankshaft view and not evenly distributed and separated by 90

[@The_R-n-I_Guy]

I didn't think I would like this video, but I learned a lot and I'm glad I watched it. Thanks for the info

[@that-pixel_guy7636]

So on an i5 can you change the firing order to eliminate the primary imbalance, cause if it’s all about timing when the rocking happens, there’s a chance to counter it right, can it be done?

[@gerardwawo]

This video reminded me that physics is not my strong suit.

[@deusexaethera]

If you think balancing one of these engines is bad, you should try a single-cylinder nitro RC engine -- not only does it only have a single cylinder, but the crankshaft terminates after it passes through the connecting rod, so there's only a counterweight on the front side of the piston. Balancing one of these little engines is such an exercise in approximation (aka "a shit-show") that some older engines designed for RC airplane use didn't bother to have counterweights at all, instead relying on the mass of the propeller to absorb vibration from the engine.

[@GoldenGrenadier]

I'd love to see a breakdown such as this on inline 7 and 8 engines. The only inline 7 I know of is in some combine harvester I think.

[@darylmorse]

There are inline 7 cylinder marine engines, as well as more cylinders.

[@ericspecullaas2841]

Pre 1950 they had inline 8's hell they even had v12 and v16 cars. They never made much power but provided really smooth operation and were easy to shift.

[@jr78racer]

Another engine that can be timed for perfect balance is the straight eight. Unfortunately, they're generally too long to be considered in modern automotive applications.

[@texas1step]

That was the most descriptive and understandable explanation of straight engine balance I've seen. Please do one on V and flat engines as well!

[@vulekv93]

Yo, could you do a review of Fiat's twin air engine. It has 2 cylinders that act like a single cylinder. It's insane.

[@chrisvig123]

The VW version of the inline 5’s are terrible...really rough engine 😯

[@calgary2800]

I don’t know, I love my VW Jetta’s 5 cylinder. In fact I thought of getting an another VW 5 cyl

[@jackberserk777]

My C70 T5 is very smooth and feels almost like an I6. Volvo did a great job with their 5's for sure.

[@arkan7rb]

best videos ever for understanding mechanics thank you very much in all languages of the world greetings from Yemen

[@LfsJujek]

i love how my 28years old inline 6 work in my e36. is so smooth many people are wondering always why car dont skake when is running

[@CL9k24a3]

What car is? 240d maybe lol

[@Martink9191]

next time- compare V vs I vs VR 60degrees v engines vs 54 degree vs boxer give more ideas. I am engineer bymyself but still learn sometimes from random videos, posts etc..

[@dakavanagh]

very informative. Looking forward to the crossplane discussion

[@288gto7]

What are the functions of counterweights if balancing shafts are there to balance it anyway? And inline 6s althought they are perfectly balanced they also have them , why is that? What type of purpose do counterweights serve?

[@d4a]

Counterweights in many cases only balance out the opposing rod journal and part of the rod (mostly just the big end). But on engines like some inline 3, inline 5 or crossplane v8 (notice the very large counterweights) they also balance out the mass of some of the pistons and rods.

[@288gto7]

driving 4 answers i see now , thanks a lot!

[@SPimentaTV]

This is the best KZbin channel about car mechanics theory!

[@RS20O0]

Very well explained, thank you.

[@haninditohaidarsatrio7393]

I can't wait for another thorough 'educational' videos about engines like this I really love this kind of content Thank you for providing such a great video, sir I really want to see V6 vs VR6 😆

[@nalendraalif1116]

I thought inline 4 is the most balanced. This video made me realize that inline 6 is even better

[@SvcGlobal]

This is one of the best videos I ever saw in this channel, thanks!

[@neilrobinson3085]

Howzabout doing a vid on radials? Thanx in advance!

[@oneselmo]

Neil Robinson Yes! Single row, double row, etc. Besides aircraft, I know they put radials into some Sherman tank models.

[@davehallier8584]

Absolutely love your videos man! You have a very thorough approach to demystifying the inherent engineering latent in engine design. Checkout Viking Aircraft Engines website, why so many kitplane builders like me are sold on Honda engines, ie the VTEC, k20, L15b versions, for me, the 195hp Honda Accord turbo. I have rebuilt many engines in a lifetime, diesel included, but I always glean so much stuff from your videos, even as a mechanic, stuff I had no idea about! Thank you for the time you’ve put into these videos!

[@MrMilfWarrior]

Great videos, keep up the good work.!! It would be great to make a video about the inline twin cylinder engine, and the balancing of the different crankshafts (180, 360, 270)(2T & 4T). Even add the Vs there too..!