The Best Way To Compare Car Engines - BMEP

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  • เผยแพร่เมื่อ 14 เม.ย. 2020
  • What Is Brake Mean Effective Pressure & Who Makes The Best Engine?
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    One of the best ways to compare engines is BMEP - Brake Mean Effective Pressure. This is the average pressure applied to pistons during the power stroke that results in the measured torque output. In simple terms, it's a way of analyzing torque per liter of engines. Using BMEP, we can answer fascinating questions: How is Ford's 5.0L Mustang engine more impressive than Ferrari's 812 Superfast V12 (at its time the most powerful naturally aspirated engine in any road car ever)? What's embarrassing about Rolls-Royce's twin-turbo V12 engine? How much power can naturally aspirated engines make? Is it worth modifying naturally aspirated engines? BMEP answers all!
    BMEP is fascinating! If you watch through to the end, I'm 99% sure your mind will be as blown as mine was researching for this video! Really cool stuff, like how Ford shows up Ferrari with the Mustang, how Rolls-Royce builds a head-scratcher of an engine, and if naturally aspirated engine mods are actually worth doing. Hope you enjoy!
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ความคิดเห็น • 2K

  • @EngineeringExplained
    @EngineeringExplained  4 ปีที่แล้ว +635

    *Warning!* A little derivation will be involved, but it will be worth it! BMEP is fascinating! If you watch through to the end, I'm 99% sure your mind will be as blown as mine was researching for this video! Really cool stuff, like how Ford shows up Ferrari with the Mustang, how Rolls-Royce builds a head-scratcher of an engine, and if naturally aspirated engine mods are actually worth doing. Hope you enjoy!

    • @rat_king-
      @rat_king- 4 ปีที่แล้ว +4

      Remind me why there is no correction factor for boosted/ at altitude engines? get total apples to apples comparison

    • @valentinuiliqnow6198
      @valentinuiliqnow6198 4 ปีที่แล้ว +4

      high regards From Bulgaria, great content every time,you are my engine mentor

    • @rainhanger
      @rainhanger 4 ปีที่แล้ว +8

      Many thanks Jason. you explained it better than my high school teacher, I finally understood that after 40 years.

    • @EngineeringExplained
      @EngineeringExplained  4 ปีที่แล้ว +52

      @@rat_king- Unless you know the volumetric efficiency for each, there's no way to know how much air each is taking in. An engine with 15 PSI of boost has double the air of naturally aspirated engine, but if that naturally aspirated engine is operating at 120% volumetric efficiency, the engine with 15 PSI of boost actually only has 66% more air, not 100% more.

    • @destin-diesel.9495
      @destin-diesel.9495 4 ปีที่แล้ว

      Neat.

  • @muhammadnajamuddinb.norasw7888
    @muhammadnajamuddinb.norasw7888 4 ปีที่แล้ว +1255

    Jason lowkey flexing that his brand new miata is as cool as the LFA

    • @ralanham76
      @ralanham76 4 ปีที่แล้ว +63

      9:20 he couldn't contain his smile

    • @EngineeringExplained
      @EngineeringExplained  4 ปีที่แล้ว +396

      "It's basically an LFA"
      - me at the next cars & coffee

    • @hocho1717
      @hocho1717 4 ปีที่แล้ว +30

      @@EngineeringExplained Is this the new "My s2000 is basically a Ferarri"? Now i see why you bought it.

    • @hocho1717
      @hocho1717 4 ปีที่แล้ว +5

      @@Mexxx65 to be honest though. It actually is mine and has been for a while. When I am finished with college and have a real job, that is the car I am buying.

    • @muhammadnajamuddinb.norasw7888
      @muhammadnajamuddinb.norasw7888 4 ปีที่แล้ว

      @@Mexxx65 Gotta shove them facts boy!

  • @Groobl
    @Groobl 4 ปีที่แล้ว +706

    Jason is a BMEP.
    Big Math Equation Person

    • @ishkaranbrar313
      @ishkaranbrar313 4 ปีที่แล้ว

      @@Mexxx65 ikr..

    • @j.3854
      @j.3854 4 ปีที่แล้ว

      342.

    • @jiricech6370
      @jiricech6370 4 ปีที่แล้ว +1

      Elementary school level of math and physics. I mean I love it but it's as simple as it gets!

    • @m.b.82
      @m.b.82 4 ปีที่แล้ว

      @@Mexxx65 its a good comment. Big math did occur.

    • @Viages
      @Viages 4 ปีที่แล้ว

      GFNoivern Its called Engineer, Greetings colleague Jason , Electrical and Mechanical engineer here👊

  • @mmcverry44
    @mmcverry44 4 ปีที่แล้ว +115

    "...they'll walk away from you." - You said that with conviction. You must have experience!

    • @Joe11Blue
      @Joe11Blue 4 ปีที่แล้ว +4

      Doesn't even phase him.
      I like it.

  • @tynancravy5589
    @tynancravy5589 2 ปีที่แล้ว +38

    Fun fact: The Cosworth DFV has a BMEP of 13.9. Quite impressive for an engine made back in 1967.

    • @dy7296
      @dy7296 ปีที่แล้ว +1

      Ah yes, the Universal race engine of the 70s

  • @HartyBiker
    @HartyBiker 4 ปีที่แล้ว +823

    Me: "is this going to be a normal video?"
    Video starts with Jason in front of a wall of math
    Me: "ahh, just like I remember."

    • @TYFNSN
      @TYFNSN 4 ปีที่แล้ว +3

      I feel you.
      Shitty how much physics have to work for your *brrrap*

    • @thomasa5619
      @thomasa5619 4 ปีที่แล้ว +16

      The physics interests me MORE than the brap

    • @NoWr2Run
      @NoWr2Run 4 ปีที่แล้ว +3

      " A WALL OF MATH " LMFAO.

    • @tlvidriss5806
      @tlvidriss5806 4 ปีที่แล้ว +1

      @@NoWr2Run WALL OF DEATH🤣

    • @mjones2305
      @mjones2305 4 ปีที่แล้ว

      GAY AF

  • @farmerpewpew
    @farmerpewpew 4 ปีที่แล้ว +291

    "...IT BREAKS THE SCALE (that I made up)..."

    • @bruizey7319
      @bruizey7319 4 ปีที่แล้ว +18

      I almost spat my coffee when he said that lol

    • @EngineeringExplained
      @EngineeringExplained  4 ปีที่แล้ว +62

      That's just CRAZY!

    • @bruizey7319
      @bruizey7319 4 ปีที่แล้ว +9

      @@EngineeringExplained I chuckled because it's just so... you!

    • @iplaysdrums
      @iplaysdrums 4 ปีที่แล้ว +1

      Bruizey It really is very characteristic of Jason, particularly the delivery!

  • @JohnSmith-sx2fh
    @JohnSmith-sx2fh 4 ปีที่แล้ว +25

    At 120% of natural air pressure you’re looking at nearly 3 lbs of boost with an intake, this is very impressive!

  • @Wolfiecolada
    @Wolfiecolada 4 ปีที่แล้ว +54

    "it breaks the scale -- that i made up" sums up my life

    • @fricardo3
      @fricardo3 2 ปีที่แล้ว

      You meant to say it sums up your eating habits?

  • @Kepulikeppi
    @Kepulikeppi 4 ปีที่แล้ว +216

    The Rolls-Royce engine is most likely optimized for smooth power delivery (flat torque curve) and quiet operation.

    • @kundanbharambe4438
      @kundanbharambe4438 4 ปีที่แล้ว +38

      Yeah! That sounds logical! Given the fact that you are driven in a Rolls not driving it.

    • @Jaymac720
      @Jaymac720 4 ปีที่แล้ว +45

      Exactly. It’s meant for effortless and unnoticeable acceleration. It’s not meant to be super powerful like a 458. It’s meant to waft down the road without bothering its passengers

    • @boxr_4214
      @boxr_4214 4 ปีที่แล้ว +16

      good job, you watched the part of the video where he explained exactly that.

    • @mengx94
      @mengx94 4 ปีที่แล้ว +6

      Great that's all I came here to see debunked. Thx

    • @herpderp7114
      @herpderp7114 4 ปีที่แล้ว +16

      Turbochargers are pretty effective as an additional muffler. Keeps engine noise down when combined with a good exhaust system.

  • @traviskellogg66
    @traviskellogg66 4 ปีที่แล้ว +247

    If I was back in high school with him as my teacher making these equations relevant to my interests then I would of been an A+ student

    • @j.m.7907
      @j.m.7907 4 ปีที่แล้ว +8

      That's your fault that you didn't find the beauty in math/physics, not your teachers lol. You were, at least then, just Naive. Anything you could imagine, can be explained by math/physics/chemistry. Nothing has been created by accident. It's a beautiful thing when you start to realize how things work isn't it!

    • @Invisifly2
      @Invisifly2 4 ปีที่แล้ว +20

      @@j.m.7907 Teachers rarely do anything to incentivize such discovery with math though. Math is extraordinarily dry for most without some practical applications to tie it to.

    • @ytmB4HyU4kUq
      @ytmB4HyU4kUq 4 ปีที่แล้ว

      You're right about what you said. But the biggest issue is actually our education system. If they want most if not all children to succeed in school, then they need to be teaching us in ways that will cater to our interests and strengths. You can't have an education system where only some people will succeed and others won't, that's a flawed system. Unfortunately, that is the reality and it's sad that we pay taxes to a flawed education system.

    • @TeiwazTheGoat
      @TeiwazTheGoat 3 ปีที่แล้ว +11

      JOEY M You’d be an awful teacher with that attitude. Literally every science educator out there would disagree with you.

    • @gsxerwhite
      @gsxerwhite 3 ปีที่แล้ว +4

      Joel West I took a physics 101 type class and the professor made it fun by showing practical applications that everyone could relate to. Way better than any science class I had in high school. I actually looked forward to that class.

  • @TheNoopinator
    @TheNoopinator 4 ปีที่แล้ว +38

    I would really be interested in a video about BMEP calculations for rotary engines. I know they dont have many "similar engines" to compare with, but it interests me nontheless. Great video as always :)

  • @TGT_86
    @TGT_86 4 ปีที่แล้ว +212

    Someone: hey my Ferrari V8 is amazing
    Jason: (takes out a whiteboard)

    • @kj-marslander
      @kj-marslander 4 ปีที่แล้ว +4

      nice. I'd sit and listen.

    • @davidstepan8490
      @davidstepan8490 4 ปีที่แล้ว +11

      Actually, the V8 458 IS amazing.. It's the V12 that isn't (as much)

    • @nik7bkh965
      @nik7bkh965 4 ปีที่แล้ว +8

      @@davidstepan8490 The Ferrari V12 is one of the most amazing engines out there right now. Who wants to live in a world where every car is a small turbo 4 cyl with 2000ccm or even worse: only electric cars.
      Be glad for the variety.

    • @MaxxerG
      @MaxxerG 4 ปีที่แล้ว +6

      @@nik7bkh965 who would want to live in a world with no air microparticle pollution

    • @CalgarGTX
      @CalgarGTX 4 ปีที่แล้ว +6

      @@MaxxerG I know right, I'll keep my freedom to get lung cancer and other respiratory problems, and brain damaged kids thank you very much

  • @thatoneotherotherguy
    @thatoneotherotherguy 4 ปีที่แล้ว +119

    15:30 "Let's say this is a 2.0L engine we're modifying". Gee, I wonder why? ;)

    • @horstgunther9521
      @horstgunther9521 3 ปีที่แล้ว

      I am too lazy to do it and maybe I lack some of the variables but I would really like to know the BMEP of the m133 2l 4zyl Engine in my A45 with 381Hp would have. And more so the new m139 with 2l in the current A45 at 420HP..

  • @Slaktrax
    @Slaktrax ปีที่แล้ว +8

    I found a formula sometime ago that used the maximum torque the engine made in lb/ft, multiplied by 2473 then divided by the cubic capacity. e.g. 425(lbs/ft) x 2473 / 5665(c.c.) = 185psi [~200psi being about the upper limit for N/A engines]

    • @benjaminwiner6220
      @benjaminwiner6220 5 หลายเดือนก่อน

      Excellent

    • @stevecummins324
      @stevecummins324 4 หลายเดือนก่อน

      The constant 2473, will come about as the result of multiplying an assumed rpm(that of an average rpm for peak torque?)
      by the necessary unit conversion constants.
      Thus the formula will estimate on the high side for engines that make peak torque at lower than the assumed rpm. And estimate lower thsn true BMEPs for engines that make peak torque at higher than average RPM.

  • @CapnT87
    @CapnT87 4 ปีที่แล้ว +44

    Ha, I haven’t seen BMEP calculations since my ICE course in Mech Engineering 🤓🤓. Wünderbar

  • @ThungStudios
    @ThungStudios 4 ปีที่แล้ว +433

    "only compare similar vehicles!"
    > compares the mitsubishi mirage with the ferrari 458
    haha very cool video

    • @m.morininvestor9920
      @m.morininvestor9920 4 ปีที่แล้ว

      😅

    • @m.morininvestor9920
      @m.morininvestor9920 4 ปีที่แล้ว +10

      I actually used a Toyota Echo for pulling a tree once 😅 it worked

    • @user-qx7tm5df8j
      @user-qx7tm5df8j 4 ปีที่แล้ว +8

      @@m.morininvestor9920 prithee allow me to bethink about thy actions...
      its not smart to pull a tree with a car... also "tree" could mean anything.

    • @ody2cuffs508
      @ody2cuffs508 4 ปีที่แล้ว

      Use

    • @ody2cuffs508
      @ody2cuffs508 4 ปีที่แล้ว

      Use d

  • @jacob50384
    @jacob50384 4 ปีที่แล้ว +129

    I'm going to be so cool at parties. Too bad we're in quarantine and my dogs don't understand anything other than if they sit long enough they get peanut butter.

    • @savagetuner2404
      @savagetuner2404 4 ปีที่แล้ว

      Jacob Wagner what the hell does this comment have to do with this video? Go like farming elsewhere

    • @nielsonderbeke8507
      @nielsonderbeke8507 4 ปีที่แล้ว +6

      My BMEP is bigger than yours

    • @jasonmoser7287
      @jasonmoser7287 4 ปีที่แล้ว +2

      I bet they get the peanutbutter. 😉😉😉😉

    • @787brx8
      @787brx8 4 ปีที่แล้ว

      The kitty gets the milkshake and the bunny gets the pan...cake!

    • @RRSmurf
      @RRSmurf 4 ปีที่แล้ว

      @D.O.A. 🤣

  • @mishalharbi777
    @mishalharbi777 4 ปีที่แล้ว +9

    The joy of learning how it all works. I love "Engineering" when it is "Explained". Thanks Jason for a great video as usual.

  • @lesliethilow3011
    @lesliethilow3011 3 ปีที่แล้ว +3

    This is one of your best physics lessons in my view. I’m an earth science teacher who enjoys watching other great teachers teach. I’ve also enjoyed working on, maintaining and analyzing engines, airplanes, cars and motorcycles since I was a child, the offspring of an engineering wizard. So I like the topics you discuss. You have a great teaching style. I hope you keep this kind of thing up for years to come. We need more teachers like you who can inspire as well as enlighten!

  • @SeanBZA
    @SeanBZA 4 ปีที่แล้ว +115

    To be fair to Rolls, they want that engine to be as quiet as possible, and to last at least 10 years without needing an overhaul, while the Ferrari is likely to not make the distance, and in general will not be a daily use car like the Rolls. Thus run the engine in a lower stress region, but have the turbo small to maker it accelerate fast off the mark, giving the impression desired of "effortless power", the exact opposite of the Ferrari, which is meant to be heard.

    • @tommihommi1
      @tommihommi1 4 ปีที่แล้ว +29

      the engine is also designed to have a very flat power curve over the rev range, to make it feel smoother

    • @eknaap8800
      @eknaap8800 4 ปีที่แล้ว

      You're absolutely right. 👌

    • @eknaap8800
      @eknaap8800 4 ปีที่แล้ว

      @@tommihommi1 Also true. 👌

    • @iridium130m
      @iridium130m 4 ปีที่แล้ว

      Great point on reliability. The topfuel dragster engine can only go 1/4 mile between rebuilds to achieve its number.

    • @mariuszanfir2298
      @mariuszanfir2298 4 ปีที่แล้ว +6

      @Nabil Sabli "Thats how impressive rolls engine is in terms of refinement" You mean "BMW engine", right? :)

  • @DanLMH
    @DanLMH 4 ปีที่แล้ว +140

    "Spreadsheets Heck Yeah!"
    take my thumbs up EE :p

  • @gusgiesel
    @gusgiesel 4 ปีที่แล้ว +10

    8:58 "... extraordinarily expensive and super fast." LOL I love how you are working the geeky sense of humor into the videos. Thanks for another great video.

  • @jakemalinowski1397
    @jakemalinowski1397 4 ปีที่แล้ว

    It is nice to watch a TH-cam video that does not bore me with incompetence. Thank you for all the work you put into developing your videos.

  • @ejemg3183
    @ejemg3183 4 ปีที่แล้ว +40

    Basically:
    BMEP (bars) * 8 = Torque from 1 liter displacemant [4 stroke engine]
    BMEP (bars) * 16 = Torque from 1 liter displacemant [2 stroke engine]
    for US:
    BMEP (psi) * 0.544 / 61 = Torque from 1 cu inch displacemant [4 stroke engine]
    POWER:
    Torque (NM) * RPM * 0.104 / 735 = Power (PS)
    Torque (lb-ft) * RPM * 0.142 / 745 = Power (HP)

  • @fatalgaming6068
    @fatalgaming6068 4 ปีที่แล้ว +119

    Jason basically speaking gibberish the entire time:
    Me: Yes, I completely understand

    • @kj-marslander
      @kj-marslander 4 ปีที่แล้ว +5

      lmao, I don't even have to watch the video to figure out that I'm not gonna understand anything. But I watch it anyways cause it makes me feel like I know about cars.

    • @davisbyer4791
      @davisbyer4791 4 ปีที่แล้ว +2

      As my professor used to say "IT'S ALL ABOUT THE UNITS"

    • @ervinm.5065
      @ervinm.5065 4 ปีที่แล้ว +3

      Problem is I understand, I really do, but chugging down all those informations in 16 minutes is hard so I forget everything a the end. His whiteboards are between 1 and 2 hours of physics class

    • @sepg5084
      @sepg5084 4 ปีที่แล้ว +3

      if this is gibberish to you, you might need to go back to highschool

    • @demonsamongstmen562
      @demonsamongstmen562 4 ปีที่แล้ว

      ME RIGHT NOW

  • @brettmills2470
    @brettmills2470 4 ปีที่แล้ว

    Love the way you break it all down in you videos, informative to say the least. Keep it going! 👍🏻

  • @jaytroxel3495
    @jaytroxel3495 4 ปีที่แล้ว +1

    Engineering Explained... is really the perfect name for this channel. I've learned so MUCH cool stuff on here! Thanks Jason for continuing to come up with fantastic video content, and making it INTERESTING. Stay safe amigo!

  • @willmarks4541
    @willmarks4541 4 ปีที่แล้ว +81

    Can you make an online university just for car stuff like this. Right now with isolation and everything. I would be the first student. Great vid as always ! Up the Mazda with the 12.6 !!

    • @EngineeringExplained
      @EngineeringExplained  4 ปีที่แล้ว +72

      Here you go! th-cam.com/users/engineeringexplained

    • @cody4478
      @cody4478 4 ปีที่แล้ว +11

      Bosch Automotive Handbook. You're welcome

    • @olegkolesnikov7155
      @olegkolesnikov7155 4 ปีที่แล้ว +3

      @@EngineeringExplained Speaking of the Mazda, I'm surprised you didn't find the BMEP of the 2019 and later models. The tuning has been quite significantly revamped, or so I've heard. The power figures match that statement, too, with a pretty significant increase for such a small displacement. And yeah, I know the 2016 is the model you own, but come on, that thing basically copy pasta'd the Mazda 3 engine.
      Edit: just searched it up, and yeah, the 2019 model saw an increase in almost 30hp which is like 20%, insane!

    • @tzikis.
      @tzikis. 4 ปีที่แล้ว +4

      @@EngineeringExplained iiiii see what you did there!

    • @k1114da1
      @k1114da1 4 ปีที่แล้ว +4

      @@olegkolesnikov7155 It's 12.9

  • @shaunnyman4140
    @shaunnyman4140 4 ปีที่แล้ว +90

    He's literally the only person on TH-cam who is capable of proving an MX-5 is just as good as an LFA.

    • @ScootersMum1
      @ScootersMum1 4 ปีที่แล้ว +3

      yeah because an mx5 does 0-60 in 3.6s huh. LOL

    • @soundseeker63
      @soundseeker63 4 ปีที่แล้ว +2

      Just as good in one specific metric that nobody ever heard of and means little in the real world, yeah :-D

    • @wolfemancola
      @wolfemancola 4 ปีที่แล้ว

      Proving? i think you mean pretending

    • @JakobusVdL
      @JakobusVdL 4 ปีที่แล้ว

      Its pretty much self evident, but the maths help ;-)

    • @JakobusVdL
      @JakobusVdL 4 ปีที่แล้ว

      @@soundseeker63 when you say 'no one's ever heard of' you mean apart from all those mechanical engineers who use this daily?

  • @TheSuperDeuce29
    @TheSuperDeuce29 3 ปีที่แล้ว

    I have to say first how much I enjoy your videos. Your ability to use equations to describe your point is impressive. I was fascinated as well when I learned that engineers were able to get over 100% efficiency out of a naturally aspirated engine. One thing I noticed you neglected to mention in that is how important valve timing, overlap, and size play a roll in both air velocity and pressure. They use the exhaust valves scavenging effect to draw fresh air in like a vacuum during the overlap to maintain air speed. Also why the ratio of the intake valve to exhaust valve size can be so critical. Again hats off to you for super fun content. Thank you.

  • @antnyneveruploads
    @antnyneveruploads 4 ปีที่แล้ว +41

    Can I get the spreadsheet you used to calculate every car's BMEP? Asking for a friend.

    • @umarmars47
      @umarmars47 2 ปีที่แล้ว

      @Sub Scriptions huh

  • @tazjam12
    @tazjam12 4 ปีที่แล้ว +105

    "But think of how much more interesting people will find you at parties when you say words like 'Brake Mean Effective Pressure' instead of 'torque'... they'll walk away from you"
    You mean "Keep their social distance".
    Also... how are you having parties?

    • @MrJef06
      @MrJef06 4 ปีที่แล้ว

      Most people will likely walk away when you say 'torque' anyways 😉

  • @JakeSkellington1
    @JakeSkellington1 4 ปีที่แล้ว +111

    If my math teacher in highschool used cars as a way to teach equations, I would have passed every class with an A+.

    • @lordflufffluff
      @lordflufffluff 4 ปีที่แล้ว

      @B
      (Estimated Seeds per watermelon * 10) -(estimated seeds per watermelon * 4) ≈ number of seeds

    • @lordflufffluff
      @lordflufffluff 4 ปีที่แล้ว

      @B
      I can't figure it out.
      Is there a way to write an expression for that?

    • @veneratedmortal4369
      @veneratedmortal4369 4 ปีที่แล้ว

      Ahh the old trick question, where knowing math is irrelevant but being good at English is.

    • @drealist7941
      @drealist7941 4 ปีที่แล้ว

      My answer 0 I only eat seedless water 🍉

    • @BLMCFR
      @BLMCFR 4 ปีที่แล้ว +1

      And that's why I did get straight A's in math - not because the teacher used automotive as the example, but I turned every example into an automotive, railroad, or machinery example!! Geometry and math were fun and I could understand the formulas in detail!!

  • @rickyaeger5862
    @rickyaeger5862 3 ปีที่แล้ว

    Thanks for your videos.
    A great balance of information and interest.

  • @Somethingisntright64
    @Somethingisntright64 4 ปีที่แล้ว +1

    I’m glad there’s another smart person out there thinking in engineering terms. Years ago, when I talked like this in my engine building class I got that “deer in the headlight” look from the instructor. Thanks for a great video. Now onto compression ratio, quench area and L/D intake valve calculations. Yes!

  • @hh8578
    @hh8578 4 ปีที่แล้ว +12

    I think these videos are very useful, especially for us mech engineering and automotive students, but you make it easy to understand even for other people. Keep doing this good work

  • @BiggMo
    @BiggMo 4 ปีที่แล้ว +51

    Love cars, hate math - Jason is like my paradox emulsifier

    • @kj-marslander
      @kj-marslander 4 ปีที่แล้ว +1

      Think of it like this, who do you want to teach you math, an old college teacher that doesn't care about real world scenarios, or this guy, comparing everything to car engines? This guy wins hands down. But then again, I don't hate math that much.

    • @BiggMo
      @BiggMo 4 ปีที่แล้ว

      Karam J: Amen - if I’d had a teacher like him back in the day, maybe I wouldn’t hate math. (Of course that would had been before he was born) - I’m thankful for guys like him.

    • @foadrightnow5725
      @foadrightnow5725 4 ปีที่แล้ว +1

      Big Mo - Paradox emulsifier? Now that's a great term! I'm going to use it at parties! That, and BMEP. Cheers!

    • @OmicronChan
      @OmicronChan 4 ปีที่แล้ว

      @@BiggMo Nothing is stopping you from rediscovering the wonders of maths now.

  • @albertobrancati
    @albertobrancati 4 ปีที่แล้ว +1

    yours videos are always great, but man this is just amazing!!

  • @dartagnanx1
    @dartagnanx1 4 ปีที่แล้ว

    Amazing, as usual. One of your best explanations.

  • @ZulReviews
    @ZulReviews 4 ปีที่แล้ว +9

    Perfect timing ! Just today I was looking for this info because found out bmep are always there on every engine spec sheet. Now I know, thank you !

  • @sonicseaweed
    @sonicseaweed 4 ปีที่แล้ว +35

    Oooooh, more tools for my social distancing toolbox

  • @xpkbrz
    @xpkbrz 4 ปีที่แล้ว

    Best...by far... content on the show!
    To who can understand...altough it was laid down in a very comprehensive layout
    Praise the excellent good work.

  • @TheNewNoise7
    @TheNewNoise7 4 ปีที่แล้ว

    This was seriously one the most fascinating videos you’ve done to date. Freakin’ awesome.

  • @slolx50
    @slolx50 4 ปีที่แล้ว +4

    Thanks for taking me back 20 years to my IC Engines class!

  • @joshp2542
    @joshp2542 4 ปีที่แล้ว +5

    I think some people refuse to believe that for a daily driven car, top end power isn't as important as how the power builds up and how the car handles. Too many people think that they drive at redline 100% of the time and forget about things like torque and power to weight ratio.

  • @vincentlb4562
    @vincentlb4562 4 ปีที่แล้ว

    I'm student in internal combustion engine your videos are great to learn my class in another languages TY

  • @MrSpartanPaul
    @MrSpartanPaul 2 ปีที่แล้ว

    Thanks for making videos. 👍Nobody else gets into the nitty gritty of gear head stuff like you do!!! Excellent work too, btw.

  • @kylewolf1052
    @kylewolf1052 4 ปีที่แล้ว +7

    Send out the spreadsheet so we can calc our BMEP!! Great video!

    • @danieldimitri6133
      @danieldimitri6133 3 ปีที่แล้ว +1

      It's torque/displacement with a unit conversion to make it a pressure unit. You can write a long looking equation to convert to work then to the pressure it would take for that volume per rotation which might seem easy in metric because it's a very base 10 system. However metric also make distinctions between force, mass, and weight and newton's take earths acceleration of gravity into account and the rotational nature of torque measurement means a pi is involved. Imperial units aren't any better as the unit for torque and work are sometimes expressed the same way and there are coefficients on practically every unit conversion. To avoid making errors I'll just write down some conversion factors below. Maybe that doesn't break it down but for comparison purposes between engines you can get an idea. Normally aspirated engines can be compared easily and it says a lot about how well they are tuned. Boosted engines have a bigger challenge with heat management and might also make a different decision about the engines ve vs the boost used and other things. You can make dozens of comparisons between the same 2 engines normalizing for different factors but how you weight them in your mind as important is somewhat arbitrary.
      For nm/l to bar it should be nm torque/litter displacement * 0.12566 = bar bmep
      Bar to kpa is bar * 100 = kpa to express it in kpa
      Lb-ft/In³ (foot pound per cubic inch) to psi bmep is lb-ft torque ÷ cubic inches * 148 = psi
      Psi to bar is psi * 0.0689

  • @rogerio1234rogerio
    @rogerio1234rogerio 4 ปีที่แล้ว +4

    Hi, Jason. You forgot to mention your BMEP of your previous sport(ier) car. The F20c from the HONDA S2000 has a BMEP=13.1. And that's on a 20+ year old design!
    Take that, Miata!

    • @gigagdragoon2345
      @gigagdragoon2345 4 ปีที่แล้ว

      Too bad it weighs an extra 500 lbs..

    • @stancarole
      @stancarole 4 ปีที่แล้ว

      My Miata develops usable torque over the driving and racing range. I can start smoothly in third gear and race with the standard gearbox

  • @robertb3409
    @robertb3409 3 ปีที่แล้ว

    I usually watch your videos when they are available. I just saw this video on my list. Great video, very informative. I have a modified push rod 5 litre fox Mustang that makes the same amount of tq as the new Gt. It's nice to know I have roughly the same efficiency as the new engine. Keep up the great content.

  • @Osillius
    @Osillius 4 ปีที่แล้ว

    This might be my favorite EE video! Great work!

  • @Flies2FLL
    @Flies2FLL 4 ปีที่แล้ว +8

    Great video! Two things come to mind:
    1. The power stroke does not end at bottom dead center, it ends when the exhaust valve opens. This typically happens at 120-125 degrees after the piston reaches top dead center, so for the 55-60 degrees remaining after the valve opens, the cylinder pressure is effectively zero. I guess that BMEP means the average pressure over the 180 degrees from top to bottom, despite there being no pressure for those 55-60 degrees?
    2. Two engines with the same BMEP, the same displacement, and the same RPM can have quite different mid range torque and thus power. If one of them has a very long connecting rod and the other a short connecting rod, the long rod engine's piston will "dwell" for a longer period near the top of the cylinder while combustion is taking place, thus developing far more pressure than the short rod engine, and it will have way more power in the middle of the RPM band. Why? Draw this out on a piece of paper and you will see why. Draw a crankshaft throw and a connecting rod/piston that is long and another one that has the same stroke but a rod half as long. Imaginarily move the long rod's crankshaft 15 degrees or so and see how far down the piston moves. Now, do the same thing with the short rod drawing- You will see with the short rod the piston moves FAR MORE than with the long rod. Since the exhaust valve opens typically while the mixture is still burning, the dwell period of the long rod design allows more of the charge to be burned before this happens which produces the same BMEP but with more actual torque and power for the long rod design.
    Jason, you ought to do a video about this effect. Volkswagen used very long rods in the VR6 engine just for this reason.

    • @kennethalbert4653
      @kennethalbert4653 4 ปีที่แล้ว +3

      Ha! Smokey Yunik said "stuff in the longest damn rod you can"!

    • @crxtodd16
      @crxtodd16 4 ปีที่แล้ว +1

      Agreed - rod/stroke ratio is pretty dang cool, and I'm sure there is a lot more I could learn about it.

    • @trungson6604
      @trungson6604 4 ปีที่แล้ว +3

      Sorry, item #2 is not true. By definition, if two engines have the same BMEP , same displacement, and the same RPM, then they will produce exactly the same power. This is by definition and is not subjected to any variation in other engine parameters.
      Now, WRT long connecting rod, you will have higher dwell time at TDC, and you will have higher heat loss to the engine's combustion chamber at lower rpm, when there is already plenty of time for the fuel to combust, higher propensity for detonation that you may have to reduce compression ratio, thus reducing top-end power and torque...so low-end torque will suffer, in exchange for may be higher top-end power when there will be more time for combustion at top-end RPM, but, you must reduce compression ratio, which will affect top-end power. Furthermore, longer connecting rod will make your engine more bulky, heavier, and higher reciprocating mass due to the higher weight of the con rod, which will require beefier bearings and pins...that may affect top-end RPM...engineering is the art of making compromises.

    • @SidneyCritic
      @SidneyCritic 4 ปีที่แล้ว

      @@kennethalbert4653 That's not right. Prostrock will run a shorter rod than optimum so they can use a lower deck height and straighten the inlet port to the manifold. Basically you are relying in atm pressure to fill the cyl so it has priority, ie, a higher magnitude of importance, than small effects like rod length. In 2007 a 500cu Prostock was making about 1500hp@10,750, so at 3hp/cu NA they must be doing something right. lol.

    • @SidneyCritic
      @SidneyCritic 4 ปีที่แล้ว +1

      BMEP is an average, ie, more initial and less latter evens out.
      Port velocity has more of an effect in making torque then rod length. With a 2-valve engine we make max TQ when inlet port is designed to run at port velocity of 500-550ft/sec. NA engines are limited to a airspeed of 0.6mach(700ft/sec) before they go into sonic choke and stop producing power. If you want to see the influence of ports look at the LS1. It has a cam with an operation range of 3500rpm, but the engine will rev to double that because the port hits 700ft/sec at 7500rpm. The myth that a long stroke engine makes more torque because of the stroke is wrong. It makes more TQ down low because it has a small bore that only fits small valves and small ports, and this means the port hits it's velocity limit at a low rpm.

  • @ChrisMuncy
    @ChrisMuncy 4 ปีที่แล้ว +30

    LOL this just boils down to you trying to cost justify putting a supercharger on the new Miata :p

  • @beaud9974
    @beaud9974 4 ปีที่แล้ว

    That was really interesting, thanks for the video! The beginning reminded me of a physics class with the rearranging of the equations, it was great! Your videos are very informative and thorough, also I like the occasional editing and humor sprinkled in!

  • @grod4844
    @grod4844 3 ปีที่แล้ว

    wow that chart is actually very cool for seeing what upgrades might do - awesome video

  • @NotSoHandyCarGuy
    @NotSoHandyCarGuy 4 ปีที่แล้ว +28

    Love the videos, Jason. The math is way above me, but I like to pretend I understand everything you’re saying 😂. It makes me feel smarter

    • @merlinevseichik9479
      @merlinevseichik9479 4 ปีที่แล้ว +5

      One of the reasons i like his videos, he actually explains the math pretty well, so that anyone could do it pretty much.

    • @nielsonderbeke8507
      @nielsonderbeke8507 4 ปีที่แล้ว +1

      @@merlinevseichik9479 that's the definition of a good teacher!

    • @danhard8440
      @danhard8440 4 ปีที่แล้ว +1

      you took the words right out of my mouth that's also why I watch BigCliveDotCom lol

  • @chandreshverma6419
    @chandreshverma6419 4 ปีที่แล้ว +12

    Tuning your car up to double the horsepower it can make naturally
    That's why he named the spreadsheet Heck Yeah!!!
    👍👍👍👍👍☺

  • @HorrorbleGamer
    @HorrorbleGamer 4 ปีที่แล้ว

    Wow dude, everything single video you release is an eye opener.

  • @faizahmadali
    @faizahmadali 3 ปีที่แล้ว

    Brilliant explanation. Thank you

  • @AntonioBarba_TheKaneB
    @AntonioBarba_TheKaneB 4 ปีที่แล้ว +11

    please include motorcycle engines in your videos, they have impressive power for their displacement (200 HP per Liter is not uncommon for street legal bikes). For example the 2019 Suzuki GSX-R1000R has a BMEP of 14.83

    • @mateuszbarya9098
      @mateuszbarya9098 4 ปีที่แล้ว

      my 1998 r1 have BMPE of 13.8230076758

    • @SundbyCPH
      @SundbyCPH 4 ปีที่แล้ว +1

      My 97 Honda cbr 600 f3 with 66 nm has 13,85 and my 84 gpz 900 r with 85 nm has 11,65. Engine efficiency and design improved a lot between 1984 and 1997! In motorcycles you also see the same engines being tuned for torque in road and touring versions and hp in race versions.

    • @brianmichael316
      @brianmichael316 4 ปีที่แล้ว

      My 2015 bmw f800gt BMEP=13.5, and can get around 60mpg. Well done BMW.

    • @seanathanq
      @seanathanq 4 ปีที่แล้ว

      I was wondering about bikes, thanks

  • @John-md3ld
    @John-md3ld 4 ปีที่แล้ว +33

    I was playing this video in full screen and my siblings thought this was an algebra lecture........

  • @piotrzema2682
    @piotrzema2682 4 ปีที่แล้ว

    Thanks for the metric units regarding torque!

  • @Spectrolite1
    @Spectrolite1 ปีที่แล้ว

    Very informative video, thank you!

  • @danmyers2338
    @danmyers2338 4 ปีที่แล้ว +8

    This was a really good video chocked full of interesting information and presented very understandably. Just one question, though: For distance you used the stroke, or the distance the piston travels in one half a revolution during the power stroke. For the time, you used the revolutions per second divided by 2 since the power comes only every other revolution. But, that’s the entire revolution, and the power stroke is only half a revolution, so shouldn’t you divide by 2 again, or rev/sec/4, to get the actual time the piston takes to travel the power stroke? (And for a 2-stroke engine, you would divide by 2. ) That would make MEP = 8 * Torque * RPS / Vd, or twice what was presented.

    • @A-FrameWedge
      @A-FrameWedge 4 ปีที่แล้ว

      No.

    • @robostory1711
      @robostory1711 3 ปีที่แล้ว

      That actually makes sense. Should be divided by 4 for a 4 stroke and by 2 for a 2 stroke.

  • @armanpena3870
    @armanpena3870 4 ปีที่แล้ว +7

    Well done! I learned a lot! Now please explain diesel engine NVH apart from high pressure inside the combustion chamber. How some diesel engines are quieter than others.... AND high BHEP on low displacment engine does it have reliablity issues in the long run with that too much stress?

    • @einstein1984
      @einstein1984 4 ปีที่แล้ว +1

      it's the rate at which pressure increases in the diesel that's the noisemaker, some alleviate that with 1 or 2 pre injections. Also a plastic sump to dampen noise coming out the bottom helps

    • @silentIm
      @silentIm 4 ปีที่แล้ว

      Turbocharger converts part of the noise into the turbine rotation, which used to pressurize air intake (ofcourse, exhaust pressure and heat are converted too). Modern common rail injector squirts preinjection before main injection events to dampen vibration by harmonics. Also some engines actually have intake throttle, like my Chevy Captiva. While it mainly functions to maximize exhaust gas recirculation (EGR) system, it has side effect of noise reduction. Also modern heat resistant foam that is used under the engine cover and the engine hood also absorbs noise. Balance shaft is used as well to reduce vibration and therefore noise.

  • @STOL3NTHUND3R
    @STOL3NTHUND3R 4 ปีที่แล้ว

    I love these videos, helps me massively with my degree!

  • @andreas.abrahamsson
    @andreas.abrahamsson 4 ปีที่แล้ว +1

    Brilliant video. Never has physics/mechanics/mathematics been so much fun and easy to understand! :)

  • @AntneeUK
    @AntneeUK 3 ปีที่แล้ว +4

    "Spreadsheets Heck Yeah!"
    Made me laugh 😂

  • @TrueSkyl1n3
    @TrueSkyl1n3 4 ปีที่แล้ว +34

    There was me about to go “Woooahh my little Skoda is about 15 on that scale”... before I remembered it’s both Turbocharged and Supercharged 🤣

    • @basstard13
      @basstard13 4 ปีที่แล้ว +3

      Love those twin charge engines! How is it going?

    • @tojiroh
      @tojiroh 4 ปีที่แล้ว +3

      a twin charged Skoda? WTF.
      *3.5 seconds of Google Fu later*
      As yes, the wonderful VW 1.4 TSI.

    • @baileycocks
      @baileycocks 4 ปีที่แล้ว

      Andy Fisher 2.3 seconds 0-gulag

    • @georgeioannou5675
      @georgeioannou5675 4 ปีที่แล้ว

      Skoda felicia fun 1999= 10.6 bar

    • @razmann4k
      @razmann4k 4 ปีที่แล้ว

      My 2001 Renault Clio 1.4 8v is only a 10.1 on the scale :(
      Too bad this engine doesn't have a large aftermarket, or at least that I know of.

  • @stephenphilp1380
    @stephenphilp1380 4 ปีที่แล้ว

    Awesome, very clearly explained.

  • @goodgame2010
    @goodgame2010 4 ปีที่แล้ว

    Consistent PHD level content! Keep up the great work!

  • @arjunyg4655
    @arjunyg4655 4 ปีที่แล้ว +26

    Wondering where an S2000 would land, but I don’t wanna convert units lmao.

    • @bradkerr2798
      @bradkerr2798 4 ปีที่แล้ว +9

      F20C: 13.1 bar, F22C1: 12.8 bar. Slight variation depending exactly which torque rating (used 153 and 162 lb-ft).

    • @joshp2542
      @joshp2542 4 ปีที่แล้ว +3

      The s2000 would land in the puddle of oil the thing leaks and burns every 1k miles it runs. S2ks are great cars don't get me wrong but they are a bit heavy compared to the competition and they make power way to high in the rev range for a car that is daily driven on a regular basis. For a track car i'd buy an s2k in a heartbeat. For a daily driver i'll take a mx-5 rf so when the top isn't down I can keep the elements off of me and don't get the soft top buffeting like all the other soft top cars I've owned in the past and also when I take it easy commuting I get close to around 40mpg(38mpg was my highest and that was cruising down the highway at around 80mph).

    • @soundseeker63
      @soundseeker63 4 ปีที่แล้ว +4

      Couldn't be bothered to work out the BMEP, but 76.5 lb/ft per liter puts it at somewhere between the Lexus LFA (73.7 lb/ft) and the Ferrari 812 (81.5 lb/ft). Not bad for an engine that was designed over 20 years ago!

    • @agt155
      @agt155 3 ปีที่แล้ว

      @@soundseeker63 The Jag XK6 engine from the 1940's had over 70 lb/ft per litre.

  • @lucioswitch
    @lucioswitch 4 ปีที่แล้ว +26

    It would be interesting to see the value of some motorbike engine. Just for comparison.

    • @dernachtmannkommt
      @dernachtmannkommt 4 ปีที่แล้ว +16

      Lucio Switch naturally aspirated:
      BMW HP4 race: 15.1bar
      Aprilia RSV4: 14.7bar
      Kawasaki ZX10R: 14.5bar
      CBR 1000rr: 14.3bar
      BMW S1000rr: 14.2bar
      Yamaha R1: 14.2bar
      Ducati Panigale v4: 14.1bar
      Supercharged:
      Kawasaki H2R: 20.8bar (Boost: 1.4bar gauge) equivalent NA: 8.7bar

    • @AanjE
      @AanjE 4 ปีที่แล้ว +1

      @@dernachtmannkommt Lets not forget the Brutale 1000rr 14.6 its a lot more comfortable to ride than superbikes ;) well until you going over 180 then you really miss having a fairing.

    • @John-nd7il
      @John-nd7il 4 ปีที่แล้ว +1

      Usually lower but much higher rpms

    • @JakobusVdL
      @JakobusVdL 4 ปีที่แล้ว

      Thanks@@dernachtmannkommt, so up towards the top end of the scale. But able to rev much higher than even high performance larger capacity car engines

    • @A-FrameWedge
      @A-FrameWedge 4 ปีที่แล้ว

      @@AanjE I think you will miss the fairing way before 180 mph more like 100 mph

  • @curvs4me
    @curvs4me 4 ปีที่แล้ว

    Great vid!!!! Excellent detail on bmep.

  • @agustinspitale9986
    @agustinspitale9986 4 ปีที่แล้ว

    Awesome video dude! Looking forward for more videos like this in the future!

  • @morthomer5804
    @morthomer5804 4 ปีที่แล้ว +19

    Ah haha... "more interesting at parties " ... like my future wife's reaction when I said "g-force." 😆

  • @forestschultz5740
    @forestschultz5740 4 ปีที่แล้ว +12

    10:55 So you're saying some naturally aspirated engine make boost?

    • @sw1sha442
      @sw1sha442 3 ปีที่แล้ว +5

      Yes, a cylinder can fill more than "100%" if the air charge has momentum or a higher than atmospheric pressure wave forcing the charge in. This is why intake and exhaust runners are tuned.

  • @CBCycles
    @CBCycles 3 ปีที่แล้ว

    This was fantastic, thank you!

  • @marcuspotts7221
    @marcuspotts7221 4 ปีที่แล้ว

    Very cool and very well explained you make a good teacher!

  • @timstanbrook7582
    @timstanbrook7582 4 ปีที่แล้ว +3

    RPS of the wheels is RPS of the engine divided by final drive ratio. Is that cancelled out by engine torque increasing by the same ratio at the wheels?

    • @alexamend701
      @alexamend701 4 ปีที่แล้ว

      If you're referring to the power transferred from engine to wheel, then ideally no.
      The power is just transmitted in a different way, from high RPS and low torque, to lower RPS and a much higher torque. The drive ratios just take the power supplied and make it easier to use in the real world, as engines like to rev much higher than wheels generally spin.

  • @ninjadriver0078
    @ninjadriver0078 4 ปีที่แล้ว +5

    Wow, my 2003 V6 Mustang came out with 10.1. Although who knows maybe that isn't too bad for the time. Also Go Wolfpack!

    • @moritzm2143
      @moritzm2143 4 ปีที่แล้ว +1

      Well my 1999 e36 323i makes 12.5🙈
      Don't get me wrong I also like Mustangs :)

    • @einstein1984
      @einstein1984 4 ปีที่แล้ว +1

      it's terrible, murican engines always sucked at volumetric efficiency

    • @hallkbrdz
      @hallkbrdz 4 ปีที่แล้ว +1

      @@einstein1984 Pretty much. But they excelled in sheer volume!

    • @ghoulbuster1
      @ghoulbuster1 4 ปีที่แล้ว

      That's because you got the V6!

  • @Jpk516
    @Jpk516 4 ปีที่แล้ว

    So I saw the notification for this video while procrastinating on my Physics homework. Somehow you explained my physics homework better than my teacher could, and made it enjoyable too. Your videos are awesome, keep up the great content!!

  • @infidel900rr
    @infidel900rr 3 ปีที่แล้ว

    Love it - this is great content! Thanks

  • @danielteivelis
    @danielteivelis 4 ปีที่แล้ว +6

    P.S.: RR "low" BMEP for a turbo-powered engine means it is built to last (quite the opposite regardng the Ferrari engine). Also, increasing BMEP while maintaining the same engine original components (pistons, rods, cranckshafts) will ALWAYS result in shorter engine life simply because the original materials were not designed/manufactured to stand the additional stress.

    • @MeakerSE
      @MeakerSE 4 ปีที่แล้ว +1

      This is the cost aspect of what he was saying, you are going to have to start moving to exotic materials and finer tolerances to get there.

  • @nicolasboivin9746
    @nicolasboivin9746 4 ปีที่แล้ว +3

    Did the test for my 2014 Aprilia Tuono and it scores...
    13.97! Higher than a Ferrari!

    • @nik7bkh965
      @nik7bkh965 4 ปีที่แล้ว

      My Mercedes has nearly 20 so way better than you ;)

  • @jacksonmehlape6144
    @jacksonmehlape6144 4 ปีที่แล้ว

    Thanks Man. I learned something today.

  • @petercharlery7661
    @petercharlery7661 2 ปีที่แล้ว

    Well done Gerson. Looks like you can impact knowledge in simple terms

  • @tobiasstaermose
    @tobiasstaermose 4 ปีที่แล้ว +3

    Somehow feel like this needs a mentioning of a Honda K20 somewhere ;)

    • @thatcopenguy
      @thatcopenguy 3 ปีที่แล้ว

      K20 makes about 100Nm/ liter if I'm not mistaken, with the Mugen FD2 Type-R being the most impressive at 110Nm/ liter and it maintained that number until peak power.
      The BMEP thing just translates to Nm/liter, and the maximum potential for N/A motors is about 120Nm/ liter and 105-110Nm/ liter at peak power.

  • @TotalAnomy
    @TotalAnomy 4 ปีที่แล้ว +3

    Yeah, I've been noticing for years now that when it comes to motorcycles, despite wild variations of HP/litre between different models; there isn't that much variation in terms of torque/litre, with most of them being somewhere around 9-11 kgf.m/litre (keep in mind that virtually all bikes are naturally aspirated, AFAIK the only factory non-naturally aspirated motorcycle nowadays is the supercharged Kawasaki H2/H2R).
    Jason, have you ever thought of comparing engines in the form of some integration of the power curve? Of course this would require some consideration; for instance if it were integrated in terms of rpm, you would probably have to choose an arbitrary range of rpm (say the top 3000rpm with greatest power), and this would not be ideal if you were to compare between engines with significant variations of the rev limit... So I
    guess it could be in terms of a certain proportion of the rev range, for instance the top 50% of the rev limit (for a 6000rpm redline, this would mean the range of 3000 rpm with greatest power). I believe something like this would give you a more significant value to compare the ability to accelerate than simply peak power.

    • @jaydunbar7538
      @jaydunbar7538 4 ปีที่แล้ว

      "Non-aspirated"? Never heard it called that before, doesn't really make sense to me either. Naturally aspirated or forced, the engine is supplied with air so would therefore be aspirated.

    • @patrollingthemojavemakesyo5948
      @patrollingthemojavemakesyo5948 3 ปีที่แล้ว

      Still playing kill zone?

  • @blakestone75
    @blakestone75 4 ปีที่แล้ว +2

    I will definitely use that spreadsheet for when I design my engines...

  • @Kavi4GP
    @Kavi4GP 4 ปีที่แล้ว

    Something you use in industry a lot , great explanation

  • @rishi_sk
    @rishi_sk 4 ปีที่แล้ว +23

    As a mechanical engineer, this is Porn🤤

    • @Jimmiegame
      @Jimmiegame 4 ปีที่แล้ว

      Switched my major right from M.E. right before thermodynamics class... however this is still porn 💀💀💀🔥🔥🔥

  • @cesteres
    @cesteres 4 ปีที่แล้ว +19

    I don't think rolls is embarrassed about their engines...

    • @CompTechs
      @CompTechs 4 ปีที่แล้ว

      Maybe they should be, but perhaps rich folk are impressed by throwing displacement or boost at engines instead of good engineering. As long as they sell big comfy cars I guess.

    • @muumuumu
      @muumuumu 4 ปีที่แล้ว

      @@CompTechs for the rich folks,, bigger=better, more expensive etc..

    • @BigUriel
      @BigUriel 4 ปีที่แล้ว +3

      @@CompTechs There's plenty of great engineering in that engine.
      You can make an engine with massive BMEP by simply lowering the hell out of compression ratio, fitting a massive turbo and intercooler and cranking up the boost until just before it blows up. Doesn't make it a particularly impressive feat of engineering.
      When the metric you're using to measure the quality of an engine gives you results that say an MX-5 is as good as an LFA that's a pretty big giveaway that that metric by itself isn't particularly useful or relevant.

    • @nik7bkh965
      @nik7bkh965 4 ปีที่แล้ว +1

      @@CompTechs damn, people like you know nothing about cars... Rolls royce couldn't care less about a performance Stat such as BMEP, since their cars have a completely different purpose.
      The engine needs to be silent, robust and definetely not high performing (good acceleration is not important in such car). The rolls royce is perfect in that case so stop mixing up stuff you know nothing about.
      It's like saying "F1 cars are slow because they have low torque". You guys Completely missed the point.

  • @marcoaureliobanionis365
    @marcoaureliobanionis365 4 ปีที่แล้ว

    Just love this videos!! Thank you!!

  • @fivish
    @fivish 4 ปีที่แล้ว

    So refreshing to see sums without any calculus. makes it so much easier to understand.

  • @jolson5581
    @jolson5581 4 ปีที่แล้ว +4

    It breaks the scale . ...That I made up 😂

  • @krishanmendez9119
    @krishanmendez9119 3 ปีที่แล้ว +3

    My mom thought this was on zoom in a math class

  • @billnewlands2486
    @billnewlands2486 3 ปีที่แล้ว

    Once again brilliant lesson in Engineering! I liked the drag car engine, I have often wondered how they get so much grunt. Thank you

  • @bjornjochems
    @bjornjochems 4 ปีที่แล้ว

    Intresting calculations. Love your mx-5