How VTEC Works - A Simple Explanation
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- čas přidán 15. 09. 2018
- VTEC. What is VTEC, and how does it work? Variable valve timing and lift electronic control. How does VTEC make more horsepower?
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VTEC stands for "variable valve timing and lift electronic control." I guess Honda knew it was more difficult to say VVTALEC and it probably wouldn't look quite as cool as a sticker on the side of a car. VTEC allows for differing cam profiles, meaning different valve lift and duration, depending on the engine RPM.
This video will dissect a Honda Civic Type R engine to show the ins and outs of how VTEC works. The Type R, unlike many previous performance Honda engines, only has VTEC on the exhaust side, with just a single cam profile for the intake. Why? All will be discussed in the video!
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Ive been a Honda technician for almost 20 years. This video should be used by Honda for their techician training for noobs. It is better than theirs. LOL
One think that I didn't get is what is the purposefor the lower profile on the exhaust.
@@dshaprin 5:21 is this what you wanted?
@The Watchlist even at low rpm, not 180 degree, 180 degree will result 0 exhaust therefore 0 intake.
I believe the simple answer is economy and less emissions.
@@dshaprin to run more efficient
Your VTEC explanation was so clear and easy to understand. Now I know why Honda guys have something to brag about.
I always thought it was backwards hats and vape juice they bragged about.
@@sirsneakybeaky 🤣😂🤣
actually all car companies (or at least most) have their own version of it.
lots of engines have variable valves and have for a long time. Not just Honda.
@@Clickmaster5k true but none of them kick in yo.
Vtec is no joke, it's an amazing system for the price.
Facts
Mad facts
How is it amazing?
@@formula112967 it's amazing because it's simple.
@@formula112967 it makes slow cars feel just a little bit faster
Correction: The final stroke of VTEC is 'Yo.'
Variable valve timing & lift electronic control yo
Haaahaaaaa.. Nice 1
Vteck just kicked in yo
vtech kicked in YOOOOO
AMEN!
My thoughts about v-tec are now shattered forever, I always thought it was unicorns above 5500 rpm.
You're not exactly wrong........
JAJAJAJAJA Made my day hahahaha
BMos77 Sadly....I wouldnt.
doubt you are being honest about that.Most honda owners are why the stereotype began.
@@jakesmith2984 it's a joke.
If something goes wrong it is unicorns 😂
I am an aviation and race mechanic since 1963. I am presently performing a total restoration on my sister's VTEC-equipped Honda Accord. Your treatise and video on the workings of this race-bred Honda engine, thanx to its original president in Japan, is the best, and most superbly delivered I have ever witnessed. Thank you, sir. I am borrowing your video, with full credit given to YOU, so that I can show the many people who come into my open garage, so that I can get my projects finished, rather than taking that time to explain the ultimate 4-stroke cycle, internal combustion engine, which you have perfectly accomplished. Fabulous!!!
I have NEVER commented on a CZcams video before... but this explanation motivated me!!! I am a VDub guy but was curious about Vtechs and this video has just the proper amount of detailed and general info for anybody. Thanks!
*VTEC
Vw ,wow……
why dont you leave comments ?
I am ase certified and this is by far the best and simplest explanation. I will refer everyone to your video. Keep up the good work.
They need:
1) Air
2) Fuel
3) Compression
4) Spark
5) Kicks
6) In
7) Yo
You win.
I thought that “Thermal Expansion” was the main factor for the turbo’s exhaust impeller movement.
@@eluniversodelecuador nah you wrong it jus kicks the turbo yo
No.
They need :
1.Air
2.) Fuel
3.) Compression
4.) Spark
5.) T-66 Twin-Turbod
6.) MOTEC Exhaust
7.) 250 BHP Nitrous Jet
noice
I've never understood how V-tec actually work, but this was a good explanation :D thank you
You're born to be an educator. That was both interesting and easy to follow. And Idegaf about cars 99.8% of the time.
I feel like I'm back to my engineering classes after nearly 30 years.
Thanks a lot.
Excellent explanation! I can always count on you to make sense of what otherwise can seem like absolute wizardry. From one car enthusiast to another, keep up the great work! 🚘
vtec is like the simplest man...
Except he keeps referring to outgoing spent fuel and hot gasses as "air". If you're doing it right, there should be no air..
Meh, he sucks, didn't explain how that center rocker arm locks
Your not a car enthusaist.We dont use the words wizardry .
Years ago I would spend weekends watching what I believe was the best ever paid car teaching show Phr tv with Cameron Evens and Dean Skuzer. I live in Jamaica and the desire for those guys to teach; real engineering was felt through clear understanding. You are the same to me, it is clear you really want your viewers/ audience to learn. Yeshua bless you for your sincere knowledge sharing. I really enjoy your lessons.
So happy to hear it, thanks for you kind words and thanks for watching!
@@EngineeringExplained Big up ( No problem) man.
this is probably one of the best explanation of how an engine works basically cuz he actually had the time to use an actual engine. very appreciated
all that engineering and vtec owners still go and put a fart can on them
We can still beat your prius.
Not all of us lol
After Bill and his buddies have
spent their lives perfecting mufflers
to give the illusion
we can move like magic
You undo it all 'cuz you want to shout
Hey, everybody, look at meeee!
not realizing you are completely anonymous
and no one cares what brand you drive because you are a stranger
and all that effing noise makes
even sane men dream of murder.
sierra_aviator that video you posted sounds pretty raspy tho. You can’t really ever make a civic sound loud and good without a turbo even then it’s still way to loud.
I’m not saying they sound bad I’m just not saying they great
The resolution on this video is so crisp. I don't know if you've always used UHD, but I definitely appreciate getting use out of my monitor.
Awesome, happy to hear it! I always shoot UHD (past 3 years or so), though I used a new camera for most of the b-roll in this one. Larger sensor and the image quality shows!
Best automotive channel on youtube by far. What a very awesome explanation of how VTEC kicks in yos.
All your videos easily explains everything to laypeople like me, and makes engineering and math something that is not stigmatized as a subject that is hard, but something that is approachable and feasible to anyone.
Thank you again for all your time and effort to make these insanely informative videos!
Jason, your tech videos on automotive topics are possibly at the very top of the heap for this kind of material. In a universe where it is truly a challenge to get a CZcams video that presents a solid and complete story on any topic, your work is consistently right on target while remaining efficient in your presentations. You speak quickly and clearly, and you provide excellent visual aids including example pieces of hardware. You don't overload us with jargon. Very well done. I noted this particular video featured in a Road & Track article. Once a great source for techy car stuff, R & T as well as C & D have descended into being mags full of advertisements. R & T simply had no one on staff to present this topic who had your engineering capability and communication skills. So my thanks for what you are doing, Keep up the good work!
I really appreciate your demonstrations. You are showing the parts while you are explaining how it works in great details in contrast to 95% of all the others who show their face more than the engine or the subject they are describing.
I really enjoy your presentation-very educational, and exceptional-keep at it !
My stomach’s VTEC engages after Chipotle.
after a few hours antilag too
Then the Electronically-Controlled Oil Lubed Intake (E-COLI) kicks in.
Thats how i feel about taco bell 😂 have yall seen mans not hot car edition thats me
LMFAO! Epic comment!
I think White Castle's is great for VTEC also.
+Dcc357 yo i'm SCREAMING LMFAO
One of the most clear, professional and beautiful video on Vtec explanations. Congrats guys!!
"I am curently surounded by V-tec"
Engineering Explained 2019
Awesome! I love learning about the mechanism that allow engines to work. Normal wear and tear repairs make much more sense when we understand who the parts work together. Thank you!
Always a pleasure. I have always loved auto tech and your videos never fail to educate and entertain!
Thanks for watching!
very tall engine cooling, I put it on my daily after I converted from fwd to twin turbo
magitician that guy is a gift to the world of ricers haha
He probably forgot his nos at home.
I've had 38 cars.
Wtf does any of that even mean? Fwd to twin turbo? Tall engine cooling?
man you just gave an incredibly understandable explanation for what was the most unknown thing in my live
Thanks a lot for this video!
Excellent explanation of Honda's tremendous V-TEC systems. From the 90's to the mid 2000's, Honda's mad N/A V-TEC engines the were the best engines ever to be produced. Even today Honda has a very enviable reliability rating, no other car manufacture can hold a candle to Honda.... This is a fact.
Vtec = Honda's name for Variable Valve Timing
Lots of manufacturers have been using VVT for decades.
Toyota. I mean imma huge fan of Honda, ive owned many. But uou gotta give respect to Toyota. They sre at least as reliable as Honda
this bring back memories when I was at technical school 5 years ago, so much learning, appreciate.
lol thank you i never really understood how it works, i used to own a 94 Accord EX with VTEC and whenever i pushed the pedal a little harder than needed, VTEC kicks in yo
Saw a lot of videos on V Tec.. But this explanation was by far the most easiest to understand.. Thanx and Happy Revving..
Thanks once again for a fine presentation. It is amazing how much the engine tops have developed, and how complex they have become.
awesome! I already knew the basics of VTEC, but I wanted to hear an engineer's explanation. thank you
*Accelerating from a stop*
"Eh, this thing isn't too slow..."
*Engine reaches 6000rpm*
*Vtec kicked in yo*
BWAAAAAAAAAAHHHHH
Donut reference?
@@markqqq_ of course! I was wondering if anybody would get the reference.
Lol haha
Dylan Green And they still.lost against me 🤣
@@markqqq_ it's 5500 Rpm to be exact
I've just come from watching someone else explain VTEC, with a bunch of video effects, humour etc etc (which I have no problem with normally), but that all got in the way. Yours was by far the better one, it was perfect! Thank you!
Give this guy some money! This is worth more than mechanical engineering classes I have taken
This was awesome, thanks for sharing. This was a great explanation. I do miss the days when VTEC was on both Intake and exhaust. My 8th gen just has it on the intake side since its a N/A motor.
All the Hondaphiles are exhausted after EE's sexy VTEC talk.
I don't comment very often on any type of forum but I must say sir... great job! Clear. Concise. Best vid I've seen on VTEC. 👍👍👍
Great explanation. The whole thing is so complex it's mind blowing it even works.
"you mash the skinny pedal and she dont go then she goes" -one of my engineering intern buddies
No
Really Nice Video, i can see a lot of effort went into it. Thanks!👍
I come from a Computer Science background but what u taught in this video about ivetc i understood it 💯%. Really practical teaching is far more efficient than theoretical teaching.
I have watched a number of your videos and my knowledge of cars are very basic at present, thank you for simplifying the explanation of how the vtec engine works.
My Brain needs VTEC to understand this video
Aaaaaahhhhh
😂😂😂😂😂
That's not possible due to the First law of thermodynamics
The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes, distinguishing two kinds of transfer of energy, as heat and as thermodynamic work, and relating them to a function of a body's state, called Internal energy.
The law of conservation of energy states that the total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed.
Wow man. One of the best explanations of vtec I’ve ever seen!
This couldn't be explained simpler, well done my dude. You're a legend 💪
Honda is first and foremost an engine company, ingenious design. Excellent explanation!
Dude you're amazing you should put your own mechanic's school!!
I'll be the first in line.
My favorite stroke is the exhaust/release stroke. Love a good release stroke.
and you need to make sure the ports are sized correctly....you dont want em too small or too big
That's what she said. You get em pregnant sometimes with the release stroke.
its good to release sometimes
I had no understanding of how variable valve timing worked before this video. Now I have pretty good idea...in 6 minutes. Kudos. That's how education should work.
Nice to see that you're channel has grown this big already! Congrats!
You mentioned that VTEC on the intake allows more air in at high RPM by lifting more, but that lower lift was better at low RPM because the air-fuel mixture mixes better. Thus why VTEC is desirable.
However, it's not clear to me why you would want VTEC on the exhaust in this turbo engine. Why not always have the max lift on the exhaust?
Sorry I'm not an engineer, so I'm curious about VTEC on the exhaust side vs the intake side. Makes sense to me on the intake, just not the exhaust when there is a turbo.
Curious as well. Maybe so Honda can sill say it has vtec or could be a long contract with a supplier?
With the exhaust valves its about getting all the exhaust gasses out of the combustion chamber as quickly a possible. If you have a lot of lift and duration (aggresive cam profile), it will be great for high rpm situations but for lower rpm's you dont want much lift and duration to make sure your exhaust gasses have the right velocity and all the gasses get out of the combustion chamber.
pretty much why you have gears in your car
Somebody in comments answered this question.
When the exhaust valves open slightly the gases move faster and this creates some sort of "negative pressure" that will help pull the air through the intake valves. On high RPMs the exhaust gases will move fast even with high valve lift because the piston is already moving fast.
I know my answer wasn't accurate at all but this is the main idea XD.
I think it's same as turbo scavenging.
Oh god here comes the vetec yo comments.
@ph1ght lol yes I didn't see that
Here come the "oh god" comments. Smh
@@jlopez0027 actually I think I'm the only one lol
Vtec kicked in yo!
🗣Vtec braaaaaaaaaaaaaaaaaaaaaaa🤙
Great video!! Your explanation was excellent, the pace of the video and editing was superb, and it was so easy to understand.
I'd always wondered how that worked. A mechanic told me it was done with oil pressure but didn't go into detail like this video did. Thanks, it's no longer a mystery.
Someone once said "The more complex a system is, the more that can go wrong", or words to that effect. We are rapidly reaching that point with internal combustion engine technology. So far so good for the VTECH, but others (cough Mercedes) have had all kinds of problems with their "advanced" engine technology.
Yeah, hi tech ok for toys but why does my daughter's corolla need vvti, I see that embossed on the valve cover and I think $$$$'s to maintain/fix when it goes wrong ...
*cries in BMW VANOS valves...*
Man, you are amazing. I learn a lot from you
This really is a very good illustration and explanation. I watched one car show on TV, the one with those two brits, the short chubby guy and the taller lean guy that did all the work. He showed how this works on the top of an engine he had exposed. Pretty clever
EXCELLENT presentation- you made me realize it's all about oil pressure when engaging VTEC- which leads me to believe that the days of putting in any oil are over. In 'the good old days' you put in whatever; 10-w40, 10-30, straight 30; With these engines- I now understand why I see 0W30 on the shelves. Zero viscosity- that's gotta be like water... now I know why. Again- great vid.
Love this show soooo much , thanks for everything.
Thanks for watching!
Really a Useful video
The best explanation of VTEC I have seen so far. Great job.
Worked on my cars all through my life, until retirement (many moons ago). Now with things like V-Tech and not tinkering on cars anymore, I've lost touch with newer technology. Thank you for explaining this in a not too "High Tech" way. You made it easy to follow versus other sites that assume you already know all about them.
Nice try. Everybody knows VTEC is nitrous mixed with steroids and rocket fuel.
+ Red Bull.
and the heart of a god.
I could have sworn it was unicorn farts
"Power Thurst! ROCKET EDITION!!!" "Gratuitous amounts of energy!!"
With nos
Always wondered how exactly the purposeful turbo lag feel of VTEC worked. Type R engine looks like the real deal!
So far the best and simplest explanation of VTEC, keep up bro
Thanks for this explanation of VTEC. I just bought a 2002 Accord with VTEC and this really helps my understanding of the engine.
Great video! Thanks for posting. Can you make a video explaining how Fiat's MultiAir valvetrain works?
Xavier Lemos
This
Xavier Lemos fiat is trash
Question, where do you find all those engines in perfect condition?
They are likely provided by the manufacturer so they can get more videos on their technology.
i dont think so Dan...why are you speculating on that? Honda is well known for NOT providing engines even to their own race teams...most people that race Honda fork over the money to buy Honda
stickloaf People aren't allowed to speculate these days? Has that become too offensive as well? Can't see what else you could be whining about.
Great video! I have worked on theses a few times, Honda does a fantastic job no question, this engine is a great bullet proof package. Have you done a video on sliding cam technology? That would be a good one to explain also, thanks.
Very good explanation and technical grasp, and a worthwhile tutorial!
"""Very well explained thank you """
while you have that type R engine see if it will fit in that S2000.
Why you should do that?
The F20 is an epic engine and perfect for the S2000.
@@e.s.3904 BOOST BOI
N/A Boi
Will it fit in my Honda?
@@e.s.3904 ehm, his s2000 is boosted...
I've watched a ton of VTEC explanations and this is the best one.
Wow. You did a great job explaining and loved the illustrations as well!! Thanks for sharing!!
can someone please explain to me what the original "vtec just kicked in yo" is from?? Fast and furious ??
the answer will be answered the same time we discovered the theory of everything
I just happened to look up the specs of my own Civic--again. And once more, the only thing I regret about my car is the lack of VTEC (it's an '04 LX 2dr 5MT, btw)
Unfortunately you also bought the ugliest civic in Honda history /:
Yeah, I didn't actually like how backend looks, but it's grown on me.
Go find a VTEC head, ECU, n harness, and get those 20 extra ponies after 5600 RPM.
Big salute bro....i should have watched while i did my mechanical engineering.. better late than never...thanks alot bro...thanks from India
Absolutely stellar explanation! Thank you for adding the bit about the forced induction and VTEC tango. :)
naturally aspirated power, it’s so clever
yes to achieve extra power by injecting more fuel & air mixture with the added physical shaft, which is the effect almost as same as the turbo engine does without sacrificing reliability. Brilliant design 😄
@@kelvinxu3058 idk about without sacrificing reliability considering in order for it to matter it has to be at high enough rpms which are inherently more wearing on the engine and connected components
@@foojub6907 by your logic, running your engine at any RPM inherently makes it less reliable.
@@jarodthornton higher rpm = accelerated wear = less reliability, no?
@@foojub6907 I'm just stating that by your logic, any RPM is essentially wearing the engine out faster. Depending on model and year, VTEC kicks in between 2,300 and 5,400 RPM I believe, and depends on other conditions as well. The connection to a turbo comparison in terms of affecting reliability because of higher RPMs is logic that also leads to not driving your car at all because... your logic. idk.
A gentle critique here:
It wasn't explained why a lower exhaust profile would ever be ideal.
Also what about the variable timing part of VTEC?
Thanks :-)
"It wasn't explained why a lower exhaust profile would ever be ideal"
I'm kind of guessing here, but maybe it's because it takes less energy to move the valve less, and at low RPM you just don't need that huge exhaust opening.
exactly what I said. I've been scrolling comments for 10 minutes to find someone who also saw it.
Loved the way you explained it. I totally understood how VTEC operates now. Thanks mate
Wonderful explanations like always.
I have a question that is: Is there any significance to an engine's displacement per cylinder being half a litre? I find this with pretty much most cars out there starting from your s2000 to bugatti veyron (both of which has a displacement per cylinder of half a litre). Although there are exceptions to this but 90% of the cars have this in common regardless of their total engine displacement.
V8s above 4.0 L use bigger cylinders than that.
I4s and V4s above 2.0 L use big cyls too.
Smaller cylinders allow for man you can just google this stuff, lol Higher air velocity which allows for more complete burn of fuel when and where it matters most, emissions.
anyone can explain which is better? 3.8 liter V6 or 3.8 liter V8?
Govin Lock The v8 will likely be faster, with smaller cylinders each cylinder has a shorter stroke with lower cylinder speed at a given RPM, thus less power is 'lost' in reciprocating the pistons, and a higher redline will likely be achievable. This is why historic racing motorcycles included a 125cc 5 cylinder and a 250cc straight 6. No torque, all redline. The 6 cylinder 250cc RC166 was supposedly good for 65hp.
For Oversquared I think that for car motors, 500cc cyls make a good balance of torque, manufacturing expense and good air-fuel mix for efficiency. The smaller NA motors in micro-cars tend to have lower thermal efficiency than the 2L class compact motors. Yes the micros are more efficient in mpg, due to lower platform weight, but the motors in the compacts utilise burnt fuel more efficiently to move a heavier weight.
@@elliottg5987 thanks for the answer, man.
I’ve never driven from my backseat before until I hit VTEC.
Very interesting and well done. The graphics of the VTEC cam was very helpful, actually more than seeing the mechanism on the engine.
Bro, you fr did a great job explaining and showing us. So that we were able to visualize everything thing. Thanks man keep it up✊✊
damn how the heck people come up with those ideas
Passion for their craft.
Think of it like making good chicken breading. The first time you do it, you try some half baked idea that turns out pretty bad. The next time you try an existing recipe, wash the chicken in egg whites, dip in flour/breading and fry. The breading is ok but could be better. So you begin to try other combinations of flour, breading and wetting agents to get them to adhere. Eventually you find a good one and your breading is too thin to have that crispy goodness your imagining in your head. So you ramp it up and start experimenting with double dipping the chicken. Repeat that process again this time finding a wetting agent that wets the first layer without washing it away. After awhile you figure out a great recipe and commit a mental note or write it down.
That is engineering, a much looser form of it but engineering non the less. Your using your existing knowledge and the knowledge of others to take a somewhat good existing idea and enhance it one baby step at a time. Do this enough and you have moved from engineering to refining. That's where you really get the amazing ideas like VTEC.
Brains
Gulraiz Farrukh Honda engineers.
Well, they go to these places called "Universities" where they study and get engineering degrees. That's what Americans do anyway. In Asia, you're just given an engineering degree after 7th grade because by then, you already know as much as an American college graduate! Lol...
How old is this guy? cant tell if he is 25 or 45
Are those the only two options?
Engineering Explained
I would say you look around 28-30ish
around 26-27 y.o
age tech
Does that make him an honorary Asian? :-/
AH HA!!
Decades of the VTEC being out and I finally learned how they work! Great video!
Very good presentation.. I have a vtec engine car, but even though I read the details from many books I understood a little. This helps me to get the idea.
Thanks
As title says it was simple explaination but you should mention that higher profile cam has much longer duration than low cam so VTEC is like V8 with big camshaft without all negatives of having big cam on all range of RPMs.
I want to see a pushrod V8 with a variable timing and lift system on all valves
@@ellenorbjornsdottir1166 5.7 Hemi got VVT, but it was simple comparison how genious is VTEC.
good point. but just thinking about it, the size and shape of the cam directly influences the duration. makes sense.
Nobody:
Shingo Shoji: V-TEC, JUST C O O L V I B R A T I O N S IN YO!!!
V-tec is probably the best idea from honda. Simple engineering to get a extra kick out of a small engine. My Honda S2K sounds amazing at 8k. Good job Einstein
The best explanation video about Vtec. Couldn’t be clearer ! Thanks !
That’s why I Love Honda, my Car is also Honda
srikanth guttula my 2004 Accord DX 4cyl has almost 2,000 miles. I dont need or want turbo. Honda cars are all turbo in 2019. I dont want turbo. Goodbye Honda.
while all my cars are German and will always be German.
AMG RS and M are the best
Yifu Yang 👍🏾
I understand why you would have vtec on the intake, but why on the exhaust? Since the benefit of using a low cam profile on the intake is better air-fuel mixing at low rpm, surely this doesn't apply on the exhaust part. Having vtec always kicked-in (yo) for the exhaust wouldn't it be better at all rpms?
I too have the same doubt 🤔
🏎
Adding VTEC to the intake will cause AFR to become inconsistent or unpredictable due to the fact that turbos do not spool in a consistent manner unlike superchargers.
VTEC on the exhaust side will generally allow more gases to exit the manifold, thus, will help spool the turbo faster. Hypothetically, it can be another way for the ECU to manipulate the turbo according to the demand.
@@bloodethirteen hes asking on behalf of the N/A vtec engines. B k h series ect
With the exhaust valves its about getting all the exhaust gasses out of the combustion chamber as quickly a possible. If you have a lot of lift and duration (aggresive cam profile), it will be great for high rpm situations but for lower rpm's you dont want much lift and duration to make sure your exhaust gasses have the right velocity and all the gasses get out of the combustion chamber.
WOW...what a short, well-explained video. I now know what the heck a VTEC engine does. Thank you for this.
Wow bro, have watched afew videos and yours was the best. Both your audio, and video presentation at the moment of explanation was very good. Thank you.
Beto explains VTEC
The real Beto only knows his soy latte.