V12 Engine - V12 Cars - Explained

[@LawrenceMarkFearon]

Every one forgets the V12's superior volumetric efficiency at a equal displacement versus a V6. Especially the TwinTurbo Charged V12.

[@rawtrout007]

Can someon put this comment in englishv

[@rebel_buddha_dar111]

not me. i always remember superior volumetric equal displacement

[@arlequin241]

@James Wheeler He's jokingly asking to translate in layman's terms

[@Skreeze_Nuts]

@@rawtrout007 more cylinders=more power strokes per second, smoother running and u can use less gas per cylinder while making same power

[@Ubernoob85]

@@rawtrout007 Volumetric efficiency is the ratio of air drawn into the cylinder versus the volume of the cylinder. That is, of the engine's displacement, say, 3L, how much air enters the engine? The big impediments to volumetric efficiency are restrictions in the intake. This is either the intake plenum, throttle, or more generally the size of the intake valves themselves being a restriction. This is why 4 valve engines (DOHC, like a K24) tend to have higher volumetric efficiency than two valve engines (OHV, like an LS). A V12 engine at the same displacement as a V6 will have a greater number of total valves in the same architecture (e.g. a DOHC engine will have 48 valves versus 24 valves, OHV would have 24 valves vs 12 valves). That means it will have a higher valve area to displacement, and therefore will have a higher volumetric efficiency. Simply, the V12 has greater ability to breathe.

[@barath4545]

We need more V12 crate engines. Enthusiasts did make an LS V12 and I know one can get BMW V12 (850) engines as a crate motor as well. But there should be a market for more than that. Swapping needs to come to Europe and be legal freely. Especially when a lot of old crap on the roads today has worse emissions than a modern crate engine that can produce more power for less fuel as well.

[@TriNitroToluol4u]

+barath4545 Agreed. The regulations on engine swaps should be lowered, especially in germany.

[@barath4545]

TriNitroToluol4u Completely agree. Imagine if they sold V12s with cylinder deactivation built-in, so one could smog test the car on 4 or 6 cylinders and drive it past the cops in the same mode and then flip an ECU switch, possibly hidden with a password on a laptop and boom, V12 again.

[@TriNitroToluol4u]

Good idea but I doubt you could trick the TÜV with that. Although I don't know if they check your ECU settings

[@barath4545]

TriNitroToluol4u You could right they could find out if it was a mechanical thing, but a hacked ECU is easy to hide. The interface could simply have a hidden access point to the "secret settings" without displaying the way in there. The deactivation is already done by factories so could easily be worked into a factory crate engine and TuV would just see a crate motor with "street settings" and no (as far as they can see on their laptop in the official interface) way of setting the ECU to non-legal settings. It should be worth a shot. Speaking of TuV and Germany it baffles my mind that Audi/Merc etc dont sell crate motors. One could get re-frubished RS4 engines for 20 grand euro on a site I saw, for swaps, and any swap of a modern engine would almost always be cleaner than the old junk it usually replaces so it should be an everybody-wins situation. A bit sad. At the very least electric motorswaps should be a thing. Jay Leno is doing one and putting a Tesla engine into a 1914 Detroit Electric :) ... For real!

[@V12-e8b]

+barath4545 Agree.....it would be so amazing to see V12 crate engines!!

[@davidrobert2007]

I made a home made miniature V12 engine, it's on my channel. I learned about the crankshaft balance for it from your inline six video, so thanks, EngineeringExplained :)

[@dabshow8989]

davidrobert2007 dope bro 👌👍

[@famicomnintendo]

@@dabshow8989 impressive indeed 😮

[@OnurCanPişkin-u6i]

Hello, how can I find the crank throw angle values ​​of V12? Can you make an approach?

[@pauprat8495]

Thanks for the video! IIRC one of the main advantages of the V12 is the flow of air inside/outside the cylinder. Maybe would be interesting to calculate it when you go from a I6 or V8 to a V12. When F1 cars were 3.5l and had free cylinder configuration, V12s like the ones used by Ferrari had more power, but the V8s were more nimble and had more torque.

[@ColinCren]

Another Con for the list: to get the same displacement there is more surface area on the sides of the pistons so there is a loss to efficiency from more friction.

[@adrianmonk4440]

Yeah, but you got HP, & Torque to spare on V12 to overcome piston wall friction. Pistons generally not same size as V6 or V8. V12 has more frequent power pulses, AND higher red line advantage. That's my story, and I'm sticking too it.

[@adrianmonk4440]

Often Ferrari does not Turbo its V12s for the more whorier sound of normal aspiration.

[@frankbiz]

You are amazing at explaining engineering, a lot goes over my head but still get it. 👍🏻

[@RealEnglishNow]

There's something to be said about extremely intelligent people that have such knowledge and mastery over a subject - it's, for lack of a much better term, very sexy - I'm a straight male but hearing you talk so expertly about V12 engines just makes me want to give you a huge hug. You deserve excellent things, my friend.

[@jayzrush8112]

Sound like automatic engineering class, keep it up bro

[@cgberz]

Something you didn't touch on was friction... Definitely something pretty important. With the same displacement and more pistons you'll have a greater surface area to experience losses through friction. This is likely why we don't see very many "small" displacement 12, 10, or eight cylinder engines.

[@Viizzai-os]

Chase Berz ^this is a big part of it too. Mercedes makes a 4.0L V8 now which really surprised me. Especially considering there are V6s with higher displacement

[@bavarian3450]

it's not always all about thermodynamic efficiency or power efficiency, v8 just sell better than v6's in luxury cars. Also, V6 are only interesting if you have a FF car

[@Tuberuser187]

That friction can be a benefit too, on certain cars with the right setup and with a skilled driver as it can be utilised in engine braking. The mass has more energy in its rotation but has more friction so engine braking can be as smooth as the engines power delivery, less risk of lift off oversteer.

[@lintonlive]

Your videos are extremely useful. You're just as good if not better than many instructors.

[@darkoneforce2]

Another limitation you didn't mention, in naturally aspirated engines (with no intercooler), power loss due to friction starting from around 16000+ rpms or so (really high rpms). I remember Ferrari in '95 tried to fix this with some really large air intakes for the radiators, but this it added so much drag that they really didn't gain anything in speed. So they switched to V10s in '96.

[@User-nu6km]

AMVM v12s were making a come back in 2000

[@OnurCanPişkin-u6i]

Hello, how can I find the crank throw angle values ​​of V12? Can you make an approach?

[@BC-wj8fx]

Good video as always. Hint, it's said "cubic centimetres"! (1 litre = 1000 cubic centimetres = 10 centimetres "cubed")

[@jscricca]

Another great video. I hope the Italians keep making them even with fuel standards tightening

[@DELJSAM]

Thank you for explaining (even if i don't understand the formula "yet" lol) Overall very helpful. I am an automotive technician but I am actually thinking about going back to school for Mechanical Engineering. If I do, ill make I mention you as a motivation. Knowledge Is Power.

[@cesincuri5870]

Thank you very much, this kind of explantions are so important

[@stevegirot1885]

Awesome, these keep getting better. I agree that a W16 video would be great!

[@SL-ix4yk]

Wow, you should be a math teacher, I’m not good at math and you explained that very well I could understand!! Excellent vid!

[@351HOON]

Great vids man very comprehensive, im getting more of an education watching these vids then going to school :P

[@sctm81]

One main advantage of course is the smooth sound .... Btw, how does it compare to a V10 or V8 of similar displacement ?

[@rossbrumby1957]

1985 Bathurst race should give you all you need to know there. XJS V12 vs Holden Commodores and Ford Falcons V8's.

[@skrattedieratte]

Don't forget the mass-market V12s froh Jaguar... 5.3l and 6.0l. The first post-WWII massmade V12s. Got one and don't ever want to hand it over...!

[@TheAnonymous1one]

Also inline 6 and v12’s have 7 main bearing caps that help with strength and durability

[@rossbrumby1957]

Not all inline sixes- the old slant 6 had only 4 mains.

[@soaringvulture]

@@rossbrumby1957 Yeah but they were big ones. Same main bearings as a Hemi.

[@tenzinsmith]

Great video. V12s are my faves.

[@niisev]

Thanx for explaining the V12 engine

[@ClanChapman]

Like you Sam, I just stumbled on this channel and Jason your brilliant. I am a bit disappointed though, would like to see some theory on how these configurations affect torque. Excellent, keep up the good work!!!

[@adrianmonk4440]

It was Too Fast of Coverage !!! Either give rules of thumbs & summaries or please slow it down a bit. It was almost as bad as my Differential Equations instructor at U of M. That guy needed a caboose boosting, only bc he despised undergrad students. Use Larger diagrams on Larger or Two White Boards, Zoom in on formula and Answer (in Edit stage ?). I REALIZE single camera, simple setup. I THINK OVERALL, YOU DO A GREAT JOB. I believe you did something on Gasoline energy content with Ethanol, REALLY, REALLY GOOD !!!

[@kevinramirez3686]

Show more cars on the video like accleration this is so much in depth

[@themafiakingz5614]

This video helped out a lot thank you

[@ghettoflyer]

I think you should also cover the negatives of a small bore... Small bore means low piston speed but also means reduced volumetric efficiency, because of the lack of space in the bore the engine can't draw as large of a/f mix in during the intake cycle due to shrouding of valves from the small bore. Hence why a 6 Liter V8 (large bore & short stroke) can make 600-1000 HP NA (at the same RPM as a 6 Liter V12) and a 6 Liter V12 (small bore & short stroke) has trouble making more than 600 HP NA at the same RPM.

[@custommotor]

I think that has a lot to do with the stroke instead. Most v12s have a stroke a in shorter then v8s and horsepower is a result of torque and rpm. and your confused a small bore doesn't mean slower piston speeds a shorter stroke means lower piston speeds because the piston moves less distance on the up and down stroke

[@custommotor]

also another note - If a v12 wanted equal torque to that v8 it would need to be 9L with the v8 stroke and bore or have a huge stroke but small bore.

[@doc7000]

custommotor Going between a V-12 and a V-8 engine there isn't some sort of rule that dictates the bore and stroke of your engine. The reason that those old solid lifter 427 big blocks of the 1960s and 1970s were able to run 8,000+ rpms and the current LS7 at 7.0L can not comes down to the benefit of a big block. The bore spacing of the small block is 4.400 inches (remains that) while the big block I believe had a bore spacing of 4.840 inches. For this reason the LS7 has near the limit as far as bores go for the Small Block (there are some specialty small blocks that are pushed to 4.250 inches bore. In order for a V-8 with a 4.125 inch bore to hit 7L (that is the bore of the LS7) it has to use a 4 inch stroke. At 7,100rpms the piston speed is similar to that of the Honda S2000 which depending on engine red lines at 9,000rpms. If you could go with a wider bore then you could use a shorter stroke and make 7.0L, this would allow for a higher max rpm of said engine. You could also destroke the LS7 down from 7.0L in order to obtain a higher max rpm while having a piston speed within safe limits. The big block 427 having a stroke of 3.760 inches helps it at rpms compared to the LS7 4.00 inches. For example the 572 cubic inch big block crate engine has a bore of 4.560 inches, you only need a stroke of 3.270 inches in order to make a 7L engine. The benefit of a V-12 over a V-8 is that you can hit the same displacements with both a shorter stroke and smaller bore. A V-12 with a 3.890 inch bore and 3.000 inch stroke is 7.0L with the shorter stroke giving you a higher rpm potential.

[@ClanChapman]

+ghettoflyer Not so, you should check the engine configuration/HP/torque on some of the Indy engines.

[@tomauger2783]

Video on the Bugatti W16 would be great!

[@tolis5631]

Very nice. Did mechanical engineering degree helped you to find out that much about cars or you learned on your own??

[@mikethecripple]

Engineering Explained yes, i have a point, i had a 2JZ-GTE in my supra, and in all its trimmings that weighed in at 240kg... this has now been replaced with a toyota 1GZ-FE (toyota V12) and this weighs in at 198KG... just a fun fact, but very good information other wise :)

[@benjamintucker1075]

Class is in session!

[@eyemastervideo]

I'm curious about the crank loads, twist caused by longer engine blocks. Also in a V12, the oil pump would have to supply more oil to more places, what effect does this have?

[@rossbrumby1957]

Smaller diameter cylinders handle higher pressures easier so ability to raise compression and performance increases.

[@reginamanluyang8475]

Engineering Explained I have a suggestion. Can you make a video about what engine is better V12 & W12 please...

[@memphis10camaros]

Very good job

[@millankumar9245]

Can you please do a flat 12 vs a V12 video?

[@TheStriker0525]

can you do a video on the Bugatti W16

[@EngineeringExplained]

Indeed I can!

[@georgem3155]

Engineering Explained really want a video about W engines

[@MrRockstarSocial]

Engineering Explained Don't forget the quad turbo :)

[@fhudkins]

Your videos are wonderful, apart from the sound. Have you ever considered getting a lavalier or boom microphone?

[@frodo7773]

I can understand him easily.

[@EngineeringExplained]

Farrar Hudkins Yep, I'll have a mic soon enough.

[@fhudkins]

That's great news! The increased quality of the audio will match the excellent quality of the content. :)

[@pinkzombie]

Please do the Rotary engine vdo. Also please include 1, 2 & 3 rotors.

[@saberhowell95]

That I would like to see, we just don't see rotary engines enough

[@xIWRESTLEABEARONCEx]

He already posted it. Check the description

[@EngineeringExplained]

kzbin.info/www/bejne/q57beKupg5qph68

[@saberhowell95]

Engineering Explained Thank you

[@pinkzombie]

Engineering Explained Sorry for not being clear. Please do the update version of Rotary Engine explane. Please also include the engine balance, fireing sequence of 2 and 3 rotors engine.Thank you.

[@oldayz545]

Bore/stroke ratio is completely different to the stroke/conrod ratio I was referring to. You're example might work in an ideal world or on a white board but the reality is these 2 motors would not run the same length conrod which that alone changes the piston speed. Any way didn't want to create a long winded debate, that's just my opinion after 30 yrs experience in this field. Have a good Xmas. Cheers.

[@BlueSky-qv7cd]

Piston speed depends on the crankshaft stroke not piston size, example two balls on the end of two pieces of string, one string is 2 foot long and the other 4 foot long spin them both at the same RPM the ball on the 4 foot string will be moving faster. A shorter stroke crankshaft will allow a higher revving engine not because of the piston speed but the weight and inertia of the crankshaft itself, the speed of the pistons has to do more with the engines durability.

[@nathanbarrett6692]

I would love to see a comparison of BMW's 3 series N55 engine and the M3/M4 S55 engine.

[@TopStrikerMaverick]

V12 and V10 engines produce music.

[@luca7069]

V12 are the best internal combustion engines ever made...they are so smooth, and their balancement is incredibile: you can put a coin in vertical position over a running V12 and it won't fall!!! They are also the best engines when it comes to power and sound. Their noise is not noise, it's music, it's a symphony But those new environmental laws are killing V12...BMW's M division and AMG have stopped making V12. They only companies left are Aston Martin and the two that since a long time have been making the best V12 at all, Ferrari and Lamborghini. The current generation, the F12 Berlinetta and the Aventator, will probably be the last naturally aspirated V12 powered cars ever It's so frustrating that environmental rules have killed the best engines we've ever had...some years ago, the rotary engine and now the V12

[@Skiseler]

+Luca Mino Lamborghini doesn't make their own engines anymore, ever since 1998 when Audi bought them.

[@luca7069]

+Dr. Blackbeard That's not true. Lamborghini's engines are still full designed in Italy and is Audi that uses Lambo's engines (on the R8 for example), not Lamborghini using Audi engines

[@Skiseler]

+Luca Mino You're right, I was thinking of the V10 in a Gallardo

[@gigagdragoon2345]

Technically they can still use v12s, but to accommodate to emissions, they have to lower the displacement to what environmentally friendly displacements like

[@USA4thewin]

You can put glasses filled with water on a Toyota and it won't spill.. Cheaper better and more reliable

[@stellingbanjodude]

How does the size of the piston effect it’s speed? The stroke of an engine determines its speed. Whether it has a 3.5 inch or 4 inch piston is of no consequence, the stroke determines the piston speed.

[@TopStrikerMaverick]

V12 FTW. Best version in Murcielago SV.

[@aldionsylkaj9654]

_The V12 engine has been used in many exotic brands, such as Ferrari, Lamborghini, and Pagani._ And rolls royce phantom.

[@captaincrust2180]

You should do an explanation on W16 enines

[@MrJakeblu]

I haven't read through all the comments. My initial thoughts are: How does a decrease in diameter reduce speed? 6000 RPM is 6000 RPM. IE: the distance the piston travels in the bore will be the same? Now the mass or Inertia generated at the top and bottom of the stroke is a different story. Regards, John

[@EtherFox]

What was said was that smaller pistons allow for higher RPMs. There are multiple (in some cases glaringly obvious) factors related to piston size that contribute to higher redline RPM limits. In the most basic sense, in comparing 6.0L I6 to 6.0L V12, each cylinder is displacing less area. In the sense of piston size, the smaller a piston is, the less mass it has - the less mass it has, the less reciprocating mass, thrust, counterbalancing, etc. When Jason said smaller piston, he did not inherently mean diameter. In this case, piston height would be the other dimension a person could consider. Retouching on the subject of 6000RPM on each engine: as far as the distance being the same, you are not considering that to displace 6.0L's, a V12 simply will not be moving the same distance per piston as an I6. The I6 has to move further or be wider to end up adding up to 6.0Ls being displaced by all of its pistons.

[@MrJakeblu]

JinEteru Its a been a long day, thanks for the clarification. I was thinking both strokes were 90 mm but that isn't the case. Now that I think back Jason said the bores were square and I think it was the I6 that was 90 mm not the V12. Love his work :)

[@doc7000]

JinEteru No doubt you could use the same stroke on a 6.0L I-6 and 6.0L V-12, though the bore would have to be wider on the I-6 and it will have heavier pistons. I know Dodge uses a 6.7L I-6 turbo diesel for its pickup trucks and many semi trucks use even bigger I-6 turbo diesel engines.

[@harshitsaini4629]

tell us about the controlling of throttle by accelerator pedal and governor simultaneously in petrol and diesel engines separately.

[@isaacbrinson8904]

What does the silver play button in the background mean?

[@hrishikeshmm9182]

Thanks man

[@kennethrodmell9006]

For a six-throw crank (turning in one direction only) there are 32 possible firing orders for a V12. Most of them are as absurd as they are pointless and will never be made. However it's an interesting challenge for engineering students to deduce all 32 theoretically possible patterns! Squared paper will help keep your sketches neat.

[@RedSkylinex60]

Interesting!!! How did you figure that out???

[@afhostie]

The ending always catches me by surprise

[@bobcornford3637]

Jason, I don't think you're right about the firing interval. The angle of the vee has an influence over that, as it does in any vee engine.

[@bobcornford3637]

For the same reason, balancing is also not as good as a straight six. The only exceptions area 180 deg vee.... ie flat 12.

[@sarmatiancougar7556]

They make more power but it’s done at the expense of torque. Big pistons produce more torque than smaller ones. Inline engines produce more torque than V engines because they don’t need counterweights. I strongly believe the sports cars industry is going it the wrong direction with big V engines and medium sized inline engines. A square 95x95 Inline 6 would make more torque than a Viper V10 and an LS7. The torque is far more important than the outcome hp because that’s the platform you’re working on and it dictates how much potential the engine has in the first place.

[@autobots9786]

gotta do a video on the W12 or W16 engines

[@adrianmonk4440]

As a nerd, I hope you get more action than I got.

[@thetechlibrarian]

Every one should drive a v12 once before they die. Even if you have to pay 200 for 5 laps you will never forget it.

[@prakashkarayi9137]

Please make a video about flat 6 engine

[@mrz5417]

I soooo wanna see a vr12! Is that even possible?

[@schwazeneggro4274]

Hi can you explain the a typical ferrari v12 with 65° of bank separation and how should it affect it negatively and why they run it with massive success production/volume wise?

[@fa6151]

THANK you

[@richardrohr5106]

Hello Di you have a video about the v12 crankshaft? More specifically why it is a 3 plain and why i never see flat crank v12?

[@core2duodell]

could you do a video explaining the W18?

[@codycolosi8982]

Can you do a rotary motor

[@amareewhiley6233]

Thanks

[@f430koenigturbo2]

This explain why v12 have sharp, clean, crisp,motorcycle sounding exhaust note. (or I am I wrong) Now,.Jason why can't my in line 6 have that motor cycle crisp exhaust note?

[@ViceN53X]

Slower Pistons would mean you can add more power to the engine? Like add more fuel mixture into the cylinder?

[@EngineeringExplained]

ViceN53X Slower average piston speed would mean you are not limited in higher RPM based on the time required for the flame front to travel, if that was a limiting factor. Just one of many that would allow for higher RPM, and thus more power.

[@demonofrazgriz89]

How about a video on VW's W8 from the B5 Passat? :)

[@ivo98100]

Why don't you make a video about BMW's VANOS system???

[@binjm3a]

make another video about a unique W16 engine ( buggati ) . can we go more than that ? :)

[@carsonschoen3350]

Is the maximum rpm of the engine done by the max speed of the crank shaft or the max speed of the piston?

[@ojaswagautam8302]

please tell about L-twin used in Ducati. its use over v-twin ?

[@Gitohandro]

So what does better power delivery mean?

[@jaketorralba4521]

Is v12 engine is use for sport car only?

[@marvingracious9530]

could you explain on a little bit more detail about the advantages of small cylinders? because honda took it a little to far on the 60s, with 4 cylinder 50cc engine and 6 cylinder on 150cc engine was it? the 50cc pistons are only a bit bigger than an adults thumb

[@marvingracious9530]

actually, on smaller moving parts please. now that i remember it, suzuki in the 60s also have 14 gears.... imagine having to shift up 13 times......

[@BGCoop79]

I know I’m late to the party here, but @0:36 when you are going through the formula, where did the 180 come from? You said 180 degrees, I’m assuming that’s 180 degrees of crankshaft rotation? What is happening during this 180 degrees that is significant?

[@fermin94]

Did you major in engineering? I'm currently majoring in Mechanical engineering but I don't know if I'm traveling in the right path, this is along the lines of the work I want to be doing not working in an office or designing buildings. I want to build race car engines kinda like a John Hennessey type of thing but better, what's your opinion on choosing mechanical engineering?

[@EngineeringExplained]

fermin94 ME is a great background to get things started with. Often times if you have such a clear vision of what you'd like to be doing, you need to do it yourself (rather than try to find a company that will teach you how, etc.) www.howdoesacarwork.com/p/should-i-become-mechanic-mechanical.html

[@650hpreventon]

what's is the best v6 or I6 for making it sounds like a v12. v6 from z350, 3.6 v6 from Mustang gt, 3.7 from z370 and 3.8 of geniuses couple. the reason I'm asking the size of the each engine is. usually smaller v6/I6 engine can rev higher up to 9krpm to sound like a v12. plus a smaller cylinder can spin faster at default. are all the size of these v6 really make differences? thanks

[@sp50]

Can you make a video about how torque realets to horsepower

[@EngineeringExplained]

xzz I have a couple. Check this one out, then the one in the video description. kzbin.info/www/bejne/nJivf4Jpic16epY

[@DinosaurJuiceCars]

can you do v4 engine Explained?

[@mynamedoesntmatter9013]

You mention piston speed being a factor. What if you used a slightly smaller diameter piston or shorter connecting rod on the I6 to produce a higher revving machine? I know it would still be less powerful than the V12 obviously, but could you theoretically decrease the dimensions of the I6 engine's pistons to match that example V12?

[@EngineeringExplained]

+Matthew samson Absolutely.

[@llAdriennell]

You are one smart guy!

[@harrygatto]

Does the same apply to a W12 engine?

[@kevanromero]

But the greater the stroke, the more torque an engine produces, yes?

[@KarriKoivusalo]

Not really. The torque produced by the cylinder is a factor of volumetric capacity and efficiency. The increased bore always equals out the reduced stroke and vice versa if other factors are constant.

[@Haloruler64]

I'm sorry if you answered this in a different video, but if a higher cylinder count means you can raise the redline due to the shorter piston speed, why are the higher revving engines always the I4s and the V6s and V8s generally lower redline? Weight, or crankshaft limitations?

[@EngineeringExplained]

Haloruler64 V8's are often quite large. A 2.0L inline-4 has smaller pistons than a 6.0L V8. There are many ways of making power, higher RPM is just one small method in the big scheme of things.

[@EtherFox]

You might want to reconsider you use of the word "always", too. There are a whole lot of I4s in the car market that absolutely do not rev high. Motorcycle engines shouldn't even be considered for this discussion considering they don't have similar 'lives' to car engines, and are considered to be high mileage above 20k,50k depending. It's all part of design and parts used. As far as performance and modding is concerned, it's a lot easier to buy really expensive/professional/fancy parts for an I4 to make a high-revving engine, versus a V8, or god forbid a V12. When each piston, rod, bolt, pin, valve spring, valve, seal has a premium cost, it gets really grueling to equip more and more cylinders. I've seen a few projects on the internet of people creating high-revving NA V8s and other configurations - it's a work of love, dedication, and absolute madness. Reemphasizing how design is the major factor: If you look at the Ecoboost I4s, they are pretty torque-y engines that have a shocking amount of low end torque, and almost invariably have a respectively low peak/redline RPM for I4s.

[@doc7000]

To elaborate on this, if you made a modular engine family lets say each piston is .5L (use the same bore and stroke) for a variety of engines then you can run the same rpm range on all of them. This would give you an increase of 1 liter for every 2 cylinders added. From a 2.0L I-4 engine to a 6.0L V-12 engine, with the same stroke piston speeds will be the same hence you can go to the same rpm levels with the same amount of stress.... The other side of this equation is do you want a V-12 engine that revs to 8,000rpms?, it is easy on the internet to say yes because the internet isn't the real world. In aviation for example a engine that produces peak power at 8,000rpms would be completely useless (piston airplane engines). You may use 3,000rpms for take off and 2,000 to 2,500rpms for crusing speeds, the reason for this is that you need the engines to have long term durability. After all if you flying for 5 hours at a time you can't really afford to run an engine that is for example like a formula one engine (those won't do to well running at speed for 5 hours). The same concept applies to cars however you have the ability to keep rpms low when cruising (where as an airplane needs its power at crusing rpms). So if an engine that makes peak power and torque at 5,000rpms has more longevity then an engine that makes its power at 8,000rpms why rev there?. If you have a N/A 2.0L engine running at atmospheric pressure you have a limited ability to produce torque. So in order to make horsepower it has to rev, however if you have a 6.0L V-12 engine you don't have to rev in order to produce good power. In that situation then why rev when you don't have to?.

[@Haloruler64]

Duane Craig JinEteru Thanks for the responses guys!

[@harshitsaini4629]

what does accelerator pedal do in diesel engine when there is no throttle body in it?

[@ClanChapman]

+Harshit Saini Increases fuel volume to cylinder.

[@harselius]

can somebody explain to me, so if the cylinders fire every 60 degrees right and and there are 12 cylinders then every cylinder should fire once every second revolution of the crank? if so, how would u design the crankshaft that would open the valves every other revolution? :S

[@harselius]

ah yeah, a 4-stroke engine lol already got it

[@alphafort]

to use the same 6 litr volume...can u get past the rev limitations of 7500rpm with use of exotic materials. and what could the rev limitations be pls?

[@JakeyBaby6]

He used that as an example of why V12's had an advantage over a Straight 6 rather than that being the rev limit, a lot of types of engine are very easy to achieve 7500. The main thing you need to overcome to get higher RPM I believe is maintaining airflow and fueling.

[@David-qu3ro]

Can someone clarify for me? I think I get it but not 100% sure. In the initial equation, does the 180 come from the use of a flat-plane crank? If so, would a 90 be used in place of it for a standard V8? Thanks.

[@EngineeringExplained]

David Thackrey 180 = 1 stroke (180 degree of rotation of the crank).

[@David-qu3ro]

Engineering Explained thanks!

[@barney9008]

+Engineering Explained What is the best engine I4 I6 V6 V8 V10 or V12

[@garypeatling7927]

V12 hardly needs flywheel , what's disadvantages of increasing bore apart from increasing engine length

[@heksatek3407]

i have a question. how does a f6 engine work? f engines in general

[@tonyg.8688]

Well this explained why motorcycles can red line at like 15k

[@H1TMANactual]

+Tony G. No that's not why, motorcycles are inline engines. It's because they have smaller cylinders.

[@RealKaiserBelial]

what do you mean by smooth and how does it brings benefits

[@christianhumlehaagen4431]

Is it possible to make a 1L V8 so the fuel ecc, will be greater and more power?

[@TheEsseboy]

It wouldn`t be as economical as an I4 as the surface area of the cylinderwalls are greater than in an identical displacement I4. Though it would make more power than an I4 if you made it rev to 12 000 rpm

[@csm101000]

im going to go buy a v12 now

[@juanpabloracca2279]

That mk2 tho

[@themafiakingz5614]

Do you think a v20 engine could ever be built