VTEC vs iVTEC: What's The Actual Difference?

[@Dustrunnersauto]

Did you learn something new? Got anything you want to add? Let’s hear it 👇🏻

[@jab1a]

I didn't know what ivtec was and happily surprised it's got vtc 😁 some nice animation demonstrating your points would be good but I understand they can be tricky to make 😁

[@drummerTBM]

My 2006 Honda Pilot is labeled as i-vtec but it does not have vtc. Just VCM. I think it’s really confusing that Honda did this

[@Eray2007]

You look like a teacher i know soon much

[@Jiilaker]

I wanna know about ej ek eh and some nore of this civic family

[@inhaletime]

NO

[@help9320]

*iVTEC was made by Apple*

[@Loyal_Honda_Fan]

*Your comment describes perfectly the side effects of smoking too much weed*

[@SoukaDeezNutz]

That must have been why it was missing a headphone jack.

[@muhammadrafay4743]

Great job man

[@nadsmcgee3532]

Nope, Honda since the Japanese make quality products. Apple is an american company that makes shit. Do you see the difference? Maybe you don't since you are using an apple piece of shit right now reading this very sentence 🖕.

[@help9320]

nads mcgee: I can see that you are an uneducated person, my friend. Allow me to drop you off at school, so you can learn the purpose of a joke, and maybe understand humour. :D I'm not a fan of Apple at all, and I've never owned their products, so I don't get what you're barking at, m8-

[@adhiti07]

Now I know how my grandmother feels when I explain something high tech to her.

[@SheetFiber]

🤣🤣🤣

[@louiewatson9389]

It's not complicated at all

[@jxy9993]

@@louiewatson9389 fr

[@shifty2755]

Great video. Really well explained. I had the 1.5 vtec-e engine in an EK3 civic. What an engine that was! 70mph in second gear. Really long gear ratios. Had it 5 years and only spent money on service items. Bullet proof. But the rear arches were prone to bad corrosion.

[@dagurfannarasbergsson4705]

Ay I have that car with 27 thousand km on the clock

[@DMX-du9mn]

Is VTECe the same as 3 stage VTEC in JDM EK3?

[@javdriver8826]

@@DMX-du9mn no vtec-e is econo only economic mode and normal mode (like non-vtec engine) 3stage is econo+sportish vtec

[@KamilKamil-xp8jv]

My accord 7th Gen 2.4 ivtech Automatic from 2007 year has similar or same gearbox, after reflash it can reach even more than 70mph on 2nd gear. Brilliant car, superb engine. Love Honda

[@dobermanpac1064]

After 45 years in the auto industry and the happy owner of a Honda with a VTEC, I decided to watch and see if we agree. Indeed you presented a good basic explanation. As for the crappy comments below, we’ll it’s KZbin, you’re going to have that. 😂😂😂

[@Ej6daniel]

I love i-Vtec on my 2007 tsx stock K24a2 205hp. Fast 4 cylinder car for 2007. It keeps up with my brothers 13 Vw Gti which is 6 years newer, more aerodynamic an has a stock turbo.

[@MyLifeThai371]

I just bought my first Honda. A 2008 Honda Fit with a 1.5L V-TEC engine. That thing has good power for being such a little engine and still gets 36.5 mpg running down interstate with the windows rolled down at 75 mph! Love this car.

[@DentSideDee71]

Awesome

[@melapelan2596]

Roll up your windows and increase the mpg, rolling down affects the aerodynamic of the car and slows it down. It's been proven many times on KZbin.

[@jeremyclarkson-69]

I had a 2.2l inline four honda f22 i got 21mpg but she was peppy

[@fn2ning665]

Lies. VTEC stands for Very Tall Engine Cooling.

[@Dustrunnersauto]

Accurate.

[@JoeEric3]

Exactly

[@jibbsmckenze7555]

Holly

[@aidanbarnes4349]

Exactly right

[@chrism1260]

Lmao

[@ErwinSchrodinger64]

Just a FYI: if you make VTEC run backwards, you go back in time. Try it, I'm from the future. Oh, don't buy the Play Station-15, it's complete garbage.

[@eriklopez258]

@@rixiv7868 your brain🙊

[@geometryjosh21]

How was Xbox doing? Or how WILL it be doing?

[@fahimsultan93]

how can you be from the future if you are already dead Mr Schrodinger ?

[@fahimsultan93]

hows that cat of yours ?

[@ErwinSchrodinger64]

Because there are three possible states that I could be possibly in: a living state, a dead state, and the combination of both being dead and alive. Thus, I am not one of the dead states. This is due because of the linear combinations of all solutions to my equation, The Schrodinger Equation (a partial differential equation). Even thou quantum mechanics dictates all solutions may exists, some solutions are very highly unlikely, in some cases, the probability is virtually 0 (like me being still alive)... however, it can not be 0. In other words, according to quantum mechanics, there are things that are impossible happening in the universe all the time. This is observed all the time at the molecular level, like bonds, spontaneously occurring within molecules, that aren't suppose to exists. Furthermore, I have swag.

[@jordanjoestar8839]

I've had 5 Hondas. B series, F series, D series, J series and H series. The VTEC kick in the H22 is the only one that feels like a slight kick in the ass. Sounds brutal too, much more pronounced than my B series sounded. Loud induction noise and it sounds like you took earplugs out when it hits. AEM intake and Magnaflow exhaust.

[@brokentradgedy]

Uh no B series VTEC kicks harder than H series and I series kicks harder than both

[@andrews8722]

Hondata bro; set that shit. Also I agree that B series hits harder than H series.

[@honda_maniac]

old comment but k24 crossover is loud with a tune and an intake and it had a kick when stock but useless

[@mythik140]

Have you ever driven the F20C? The VTEC kicks in so loud and physically pushes you back in your seat

[@honda_maniac]

@@mythik140 unfortunately not yet, I love the F20c

[@gunsngrgaming]

On top of i-VTEC, I believe the '06 TSX's stock cams are more aggressive than other k24a2s that were made in that generation for any Honda/Acura that used a k24a2

[@vallo220]

I just bought a 2005 Honda Accord EX-L coupe, with 5 speed manual, which is a 2.4L Ivtec Seems fast for a 4 banger. Not at all disappointed on my purchase.

[@joshdominguez341]

Oh shit did IVTEC Just kick in ?

[@silverrain99205]

Dope. I got a 2008 Honda Civic with iVTEC. 5 speed manual.

[@Goodgoy369]

​@silverrain99205 me too, I drive my odyssey mostly but I scooped the 8th Gen civic with a 5 speed. Great car. Really miss my preludes tho

[@ermesborgnino4704]

Excellent explanation. Bravo. i was wondering, so i started looking as i'm considering buying a used "Inspire" (aka "Accord" in the USA/Canada) over here in Japan. 10+ years old with low miles, so i wanted to see what the big deal was. You nailed it with this video. The best 6 minutes i've ever spent on learning about a motor and it's features. Very nicely done. i hope your channel grows like crazy so that i can learn more from you.

[@Dustrunnersauto]

🙌🏻

[@skythundersky1544]

Dude that comment is so nice. How's the Inspire? Still got it?

[@Chalky.]

The iVTEC doesn't have a headphone jack.

[@Dustrunnersauto]

k.

[@prince_sach50]

lol

[@YuhoKeebs]

k.

[@yvngdon1652]

Run it with some pods

[@eliasgill2453]

They come separately, with a price 10 times higher than their value😌

[@virgilwyatt4632]

That was a pretty good explanation and something I've always wanted to know. I'm on my 3rd consecutive V-TEC engine and overall, my 5th consecutive OHC engine, starting with the previously owned vehicle: 1991 Honda Prelude Si, previously owned 1996 Acura Integra LS SE (5MT), my currently owned 2003 Acura CL-Type S 6MT, my previously owned 2010 Acura TL Tech SH-AWD 6MT (totaled in a collision), and my 2019 Acura TLX A-SPEC SH-AWD. My wife also owns a 2005 Hyandai Sonata V-6 that has a DOHC layout. Update: In 2022, I purchased Her a new Acura ILX A-SPEC, which is equipped with a 2.4 liter DOHC naturally aspirated DFI I-4 engine; however, I’m not sure if whether it is a V-TECH or I V TECH configuration.

[@frickysuavve247]

i wanna integra type R

[@kimblem.w9952]

Keep that 03 CL 6MT. That thing's a gem and super easy to work on without the problems the 5spd Automatics had!

[@virgilwyatt4632]

@@kimblem.w9952 The car is about 500 miles from turning 250,000. I’ve had the flywheel & clutch replaced at the Acura dealership that I purchased the vehicle from in September of 2002. It now shifts like is once again new!

[@The_Touring_Jedi]

​@@virgilwyatt4632As long you change oil at 6k miles and no rust that car will outlive many out there crap they are producing today.

[@virgilwyatt4632]

@@The_Touring_Jedi That’s what I’m trying to do. It’s at the dealer right now for sudden onset, over-the-night lack of acceleration problems. Diagnosis: sudden failure of the catalytic converter. It been replaced twice before at the dealership but with recommended aftermarket ones. Cheaper but sometimes wonder if I should have went with the factory one. It was back in 2015, over $2000.00 without labor and additional parts. I believe it would have been a re-manufactured one too. Right now the dealer has me in a loaner 2024 blue Acura TLX A-SPEC with the SH-AWD package until my CL-Type S is repaired. I’m considering buying one so this a great way to evaluate it to help with that decision.

[@patelvidhu4840]

Ivtec is more energy efficient than vtec.

[@goneglord420]

Great information but you did not include how with i-vtec you have difference in VTEC engagement upon speed and throttle position.

[@chaitea6987]

Reason why the K20a3 has has the “i” in i-VTEC is because it still combines vtec with vtc just like the k20a2. Even if it’s just for economy, it still has vtec on the intake side and not the exhaust side. i does stand for “intelligent”.

[@thecnote1287]

I always thought that V-TEC was when Brian raced Dom and made the mistake of granny shifting instead of double clutching, hit the NOS too early, blew his manifold, and then the floor of his car fell off. My mistake.

[@XeroFailGames]

Except he was driving an ECLIPSE......

[@lvsa9693]

Lmao granny shifting. What's double clutching, how do u do it and what's it's purpose?

[@dangusprime]

Danger to Manifold Shut Up! Slams Computer Closed

[@chriskarsseboom2200]

Chris C no dash when spelling Vtec

[@anderstermansen130]

What the fuck do you mean "double clutching" when cars only have one clutch pedal? Quit acting like a smartass carguy when you clearly have to no clue what toure writing. Fuck off.

[@saketjoshi4476]

Brother you have earned yourself a fan... Really good explanation.... Keep up.... Deserves views in millions

[@Dustrunnersauto]

Thanks 🙏🏻

[@vooshingyung6573]

Wait! Vtec will kick in and this vid will get millions of view

[@bryce227]

I just read your article so I figure it’ll be easier for me to watch the video and understand since I’m newer to the car scene

[@ksisjdm]

I just came here to see how many people have no clue of what they are talking about

[@MechaTronic161]

Sup..Boss?

[@ksisjdm]

@@MechaTronic161 Just internet chillen

[@kudzy11]

I'm only here cuz I'm waiting for more uploads from YOU bro! 😏

[@deivyleon409]

Expensive and still slow

[@Mr.Takahash1]

K20a3 only have cam phasing. K20a2 have both cam phasing and variable valve timing. Same with the K24a4 2003 Accord have cam phasing only and the K24a2 2006 TSX have both cam phasing and variable valve timing.

[@nickbuildern]

K20a3 has VTEC on the intake valves only and VTC. Where as the k20a2 has VTEC on both valves and VTC. I have an a3. It came out of the ep3 civic

[@MattVidPro]

What about the k24a8 in the 30th anniversary accord (06 to 07

[@bryan10444]

Lol cam phasing is VVT... lift is Vtec

[@jamesdickson7173]

what about a K20z3 ?

[@RelaxAndSmokeMeth]

@@jamesdickson7173 Intake and Exhaust lobes

[@emmanuelmartin3908]

I know nothing about cars but you explaining literally made it crystal clear

[@Loyal_Honda_Fan]

I actually know what the i vtec and vtec are, just wanted to see how cool is your video to subscribe ;)

[@tyscl9516]

Just to share more technical knowledge about Honda's i-VTEC because I've got nothing better to do. To further explain the misconception at 4:06, Honda made many versions of their "i-VTEC" systems. The performance oriented i-VTEC incorporated valve lift and timing on both the intake and exhaust side. Engines like the K20A, K20A2, K20Z1, K24A2, and K24A3 have the performance version of i-VTEC. Some engines like the K20A3 and K24A8 only had "i-VTEC-E." Those engines don't incorporate variable valve lift, only a 12 to 16 valve switch over and variable valve timing. These engines usually produce more low-end torque and have better fuel efficiency as mentioned in the video. However, they don't rev as high and make less top-end power. In addition, their switch over is extremely early in the rev range and barely noticeable. There is another version of i-VTEC that incorporates variable valve lift, but only on the intake cam. Engines like the K24Z3 have this version of i-VTEC where VVL only occurs on the intake side. Both intake and exhaust sides still have VTC, so this systems sets itself in the middle of performance and fuel economy. You can generally tell the different K-Series engines apart by the intake manifold cover. If the lettering is red, then the engine has real "i-VTEC." If the manifold cover has black lettering or no lettering at all, it's most likely the "economy i-VTEC." I'd love to hear more facts from fellow Honda fans and enthusiasts. Thanks!

[@jensentaylor344]

This was very helpful thank you! I just got a 2002 Acura rsx with ivtec and this really helped me understand it!

[@rowantaylor4971]

This was very very helpful I have a 2002 Acura rsx and I was thankful to learn the more complex way of how it worked!

[@TranTek]

i still love the original Integra type R engine back in 1997

[@zavian1120]

i hope i have that car most of people said thats the best integra, like crx for civic

[@raymondanderson1026]

Bummed you left out the SOHC iVTEC varieties. There are many!

[@sajsed2]

From my experience vtec is more fun and engaging for the senses 👍🏿

[@ΛευτέρηςΚοροσίδης-φ1ψ]

you can hear vtec engaging better than ivtec?

[@garcjr]

I'm surprised not all the bikes have VTEC now even though that's where it started. I have a Honda VTX 1800. It's definitely, like all Honda's, smooths out in higher RPMs but I could use some smoothness at lower RPMs.

[@wgsvm]

I have a 2006 Honda Odyssey with 3.5 Liter V6 I-VTEC (242 Horsepower) with Variable Cylinder Management (VCM Version 1). Would be interesting if you made a video about how this engine works with both I-VTEC and VCM.

[@enriquefausto5436]

Racing on a Honday Odyssey ? 😂🏎💨💨

[@MegaOzzy28]

I have one with dream technology 2019. Is that i v-tech?

[@wolfieblackheart4185]

I seen a video on mighty car mods where they put a B16B Vtec engine into a JCM mini cooper and it out performed a turbo mini with stock engine performance tuned

[@dangusprime]

Now put a turbo kit on that B16 and you will be beating some super cars 😁

[@jordanbwalt]

Mini Cooper body and engine with supercharger is designed for track, consistent output power with good handling. That B16 has a better power curve and design for that straight line power

[@enriquefausto5436]

Was that a direct swap or did they had to do some mods to the engine bay to make it fit? 🤔

[@santinomartinez5250]

So i just wanted to comment this to see if i'm wrong or not. If any of you can correct me, thanks! Honda also has I-VTEC in their R-Series engines and the J-Series engines, which also operate differently. The first one operates in a reverse fashion, using a modified SOHC VTEC that has 1 small cam and 2 big ones. The small one activates with VTEC, which is also activates from low to mid RPMs. The J-Series uses VCM (variable cylinder management) to make an engine run on more or less cylinders depending on it's needs.

[@adhirajjadhav7918]

Then what type of i-vtec does the Honda City have. I hope it's the sporty one not the efficiency one.

[@aliunsw]

Its sadly the efficiency one :/

[@lggrover5285]

But stills kicks you

[@philipbahia7139]

yes I learned the difference thank you it was great help,I may not have iVtec but I still love my B16A SiR.

[@AKA_Furious2342]

Good Job!! Good narration Good length of video(short) Comprehensive

[@NGH99999]

I bought my '98 Civic HX / CVT new in April 1998. I can attest, it's definitely slow, but the VTEC-E delivers pretty decent low end torque, still delivers 39-41mpg on the highway, and runs great @ 200K miles. They're amazing cars. I'll never own anything but Honda.

[@mandotorres746]

I feel so much more intelligent and informed thanks man great tutorial

[@leonlawrence7083]

This guy needs more subscribers he really deserves it.

[@MechaTronic161]

I love my K20z1.

[@anderstermansen130]

The f18Z7 is bettee.

[@rdubs1705]

My 09 si with the 2.0 liter i-vtec engine still going strong with almost 180k miles on it =)

[@MikeKollin]

Yeah,.... well my 95 Del Sol has 330,000 miles and it's going stronger than ever... I did a lot of work to it, but still. It's Awesome! :)

[@IAMEYI]

Ask a racer. Ask any real racer...it doesn't matter if you win by Vtec or I-Vtec, VTEC IS VTEC!!!! *extends my arms among the praises and cheers before the cops arrive 🤣

[@gregwalker4236]

thanks! subscribed. i am trying to understand everything about honda engines. my 2008 exl 2.4 apparently has a different engine than the lx models, and is still running sweet at 152k (bought with 139k). i got lucky with this engine and car in general. of course, i don't put lot of miles on it--about 13k in three years. probably replace, when needed, with the 2.0 non turbo in a civic later model....

[@bobsacamano251]

Be careful bro with VTEC, it can blow the welds of your intake manifold. Then me and the mad scientist will have to rip apart the block, and replace the piston rings you fried.

[@constantravens4800]

Lol fs

[@dangusprime]

Bro, I never Narc'd on no one

[@under.recoil.0-7]

🤯😂😂

[@joshuaman01]

Oh genius, that's an eclipse.

[@anderstermansen130]

No worries, the DAF-X on the manifold are build to withstand 28 tons of torque pr square inch at 120mph. And the hypercoolers in the block, if connected properly to the ricers, can easily withstand the revving on vtec via a passive mechanic called "hyperflation". The piston rings however, just need to be tightened properly to the pumpshaft on the turbo.

[@drummerTBM]

My 2006 Honda Pilot is labeled as i-vtec but it does not have vtc. Just VCM. I think it’s really confusing that Honda did this

[@Sandwich420]

VVT will give more torque from 1000rpm to 3000rpm, and then a drop off until VTEC kicks in around 6000rpm giving another torque boost to near redline.

[@StarFox85]

ep3 was the love of my car life💕

[@Kyontheotakugamer]

I've gotta little diagram- regular gar reviews

[@homicidal85]

good explanation. thanks for that. i didnt need to know it but now i do and it clears up a question i had in the back of my mind since i drive a honda i-VTEC engine evey day.

[@BSon-sj9uc]

Vtec changes cam profile, ivtec changes cam profile and timing. /video

[@arisjudecabuyoc2221]

By rpm ;)

[@thecasualcommandermtg]

Hi, can you also do a MIVEC explanation for Mitsubishi and a VVT explanation for Toyota engines? And perhaps a comparison in performance for all 3?

[@mikebarney9940]

5250 rpm vtec kicks in

[@reaperactualgaming3075]

5k even is where vtec engages on my b18c5. i should note it is running a custom tune.

[@aquaafd2500]

just got my first car from my parents a 2007 cr v i’m not smart at all when it comes to cars but i wanna get into them and my friend who is asked what engine i have so we looked and it was the 2.4L i-vtec dohc pretty nice

[@truthexposer7348]

First V-Tech in the world was made by HONDA.

[@justin.m5872]

It was actually made by fiat

[@Rynnnnnnnnn]

as a women who know nothing about engine but got presentation about Honda Type R for business plan tomorrow, this thing is so fucking helpful! bye

[@kartikjain754]

Really good explanation

[@Dustrunnersauto]

Thanks 🙏🏻

[@focus45554]

@@musashi3224 I thought I was the only one thinking that.

[@aliunsw]

All honda city engines are the efficiency versions of i-VTEC but if u get the Civic Si or the 1.8L NA engine or the 1.5 Turbo engine then u get the sporty I-VTEC

[@marbysapitan5676]

Thanks for very clear explanation ... I learned a lot 👍

[@johndavidson3424]

So what the guy means here is that V-tec has a single camshaft with variable cam's and I-Vtec has dual camshafts with variable cam's. And that V-tec-E is also an SOHC with the capability of turning off some Valve's by the help of closing a cam tip in one of it's cam's for fuel efficiency.

[@mryang3644]

Showed johhny tran hitting a button....... that was NOS.. not Vtec🤣🤣

[@ragingmcqueen]

Yea. No shit sherlock

[@mryang3644]

@J.G. Brandon No shit.. if u didnt notice, he showed the clip of pressing a button when he mentioned Vtec. Which doesnt represent each other ....

[@yomcflyjr31]

Mr Yang you are so ridiculously stupid, have you ever heard of a joke?

[@khalid95eG]

Not really true... he could have his Vtec wired to a button on the horn so it engages his vtec

[@braedenwaples2440]

kal209 yemen i knew a dude that had it wired to his brights haha

[@jayc3110]

Nice video, but you don't tell us the SPECIFIC Honda models these VTECH Variants were used in especially models available in the US. it would be really useful if you had added this list of Honda Models and years, to your "description"... You could still do this! ... Thanks.

[@williamsantiago7303]

Great video bud, well said. I bought a used 2015 Honda cr-v LX 2wd back in March of this year with only 35,000 miles. My question is that I feel this vibration coming from the engine compartment and you'll see the passenger seat shake a little and me personally, I don't have a problem with it but I've heard stories that what's causing this is coming from the crank or something to do with the connecting rods not being balanced. Now that worried me because I built engines and that is not good. Have you heard about this with these engines? If you know anything about this or if ya could point me in the right direction I would appreciate it. Thank you for your video and take care sir.

[@Dustrunnersauto]

Thanks 🙏🏻

[@eduardomejiaevertsz8503]

Nice video, you forgot to mention vtec was used on Honda VFR motorcycles too.

[@danielcharles7120]

Acura 3.7 vtec forever

[@boxedowl]

iVTEC (aka VCM) was part of a major class action lawsuit. Some owners go years without problems. Others get oil consumption, intermittent smoke, new catalytic converters, fouled spark plugs, and my fav.... Not 1 but 2 gaskets holding back pressurized oil that murders your alternator on the J35 if either of the $10 gaskets leaks. On the other hand a product like VCM Tuner II will disable VCM at the real world costs of maybe 1 mpg and can legally be left on during an emissions inspection. This will save your ass if you start seeing any VCM related issues. (Oh. And VCM uses $500 "smart" engine mounts.... Yeah those are fun when they go out and shake the car to bits.)

[@AlexanderGeorge]

What years of civic is that? Just bought a 2013 1.8

[@pranav_jh]

Explained beautifully 👍👍

[@jimmousseau2765]

I hope that you can answer a question. I had a 1995 Suburban diesel. What a piece of crap. I used Amsoil engine oil and an Amsoil bypass filter. I was extremely vigilant with service. However, I had to replace 3 high pressure fuel pumps $4,500 each. It also had a small bucking on mild acceleration. It was like a backfire of one cylinder without the noise. GM Said that they didn’t find anything wrong. Have you heard of this?? I owned it for ten years because I drove a lot of highway miles and it handled great. I also had 15 Air Conditioning Compressors replaced!!! Some were under warranty but not all of them. I eventually had to replace the engine and the bucking continued with that engine too. I spent $72,000 in repairs. I know, please don’t judge. Please can you tell me the cause of the bucking thing. I’m sure someone knows. I’m sure that GM knew. I like your videos they are extremely valuable. I have never bought another GM. We went Honda from then on. 8 Honda’s since 2000 for me and my family. I love Honda. They aren’t perfect but they are way better then GM.

[@Element_y]

In UK the CL9 has a 2.4 i-VTEC system. I wonder if that's the Good i-vtec (vtec+vtc) or the bad i-vtec (vtec+vtec-e). Anyone know?

[@anderstermansen130]

Vtec vtc is shit. It rips the pump off the blocks coolers in the ricers.

[@SheratanN]

It has the full vtec, on both cams.

[@JoeBakerOutsideTheBox]

Awesome video (thumbs up and subscribed) altough i'm a little confused about my Honda Element, is the engine built for fuel efficiency or performance? (Vtec and vtc)

[@marcdunlop6946]

Johnny tran was running sr20 in his s2000 remember “a couple sr20s would pull a premium before race wars huh Ed?” As he’s pouring a 50 weight oil down his throat “where’s my motors Ed!” Sorry long time Honda boy lol put a b18 vtec into carbureted 85 civic talk about a hard swap had to blend a fuel injected harness to the original harness fun lol but worth the jaw drop by all the 5.0 litre pony boys 🤘🙏🏋🇨🇦

[@aadhityaanu]

Great explanation

[@GLICIOUS21]

Muscle car guys coming here to learn why they got apprehended by a civic with "i-vtec" on the side 😂😂

[@RaimarLunardi]

what about the iVTEC R18A1??

[@DStabs720]

That should have iVTEC=VTEC-e+VTC

[@AingEkon]

Thats for the Civic FD right??

[@H74ver]

I have this saved so I don't have to keep typing to explain. Let's use the K series for example. It has performance i-VTEC engines that feature VTEC on both camshafts, economy i-VTEC engines that feature VTEC only on the intake side, and the other economy i-VTEC engines that feature integrated exhaust manifolds. With economy i-VTEC, it doesn't "kick in" like traditional VTEC, its for fuel economy lol. Basically the economy i-VTEC only "kicks in" when driving like a grandma with a steady throttle and not the lead foot like her grandchild lol. It is not like the iconic SI with performance cams that kick in around 5k RPM. And yes I know VTEC kicks in at different RPM then 5k on the SI, but is it performance or economy? VTEC is meant to have high performance at high RPM and low fueI consumption at low RPM period, i-VTEC just made that more intelligent and confusing with its three types of i-VTEC lol. R18 engine for example is a version of an economy oriented i-VTEC that is different (even different then VTEC-e, 3-stage i-VTEC). Under the right engine load and engine speed conditions the eco i-VTEC system switches to a cam that delays the intake cam closure by extending the duration so that the piston pushes out fuel-air mixture back through the intake causing the engine to operate in an Atkinson-Cycle mode. The loss in power from going into the Atkinson cycle is compensated for automatically by the ECU opening up the throttle more (without you having to adjust with your foot on the accelerator). So it improves fuel economy two-fold by (1) reducing pumping loss by opening of the throttle body plate to give less restriction to the intake path and (2) going into the Atkinson-Cycle which uses fuel more efficiently by having a longer combustion stroke than effective intake stroke giving more time for the fuel-air mixture to combust. This also decreases emissions but who cares about that lol. There is no VTEC characteristic torque bump either. VTEC is a tricksy hobbit. All kinds of conditions. Engine RPM, vehicle speed, engine load, throttle position, coolant temperature, oil pressure etc. Can't just think RPM with VTEC kids, so many variables in this equation. Okay Economy i-VTEC explained: Although similar in many ways, the economy i-VTEC version of Honda's variable valve timing is different enough to command its own nickname. Much like Honda's emissions-conscious VTEC-E of the mid-1990s, impressive power figures were not the primary concern when developing these engines. Most notably, their exhaust camshafts are stripped of VTEC and their intake camshafts feature only two lobes and two rocker arms per cylinder instead of three. Prior to VTEC engagement, economy i-VTEC engines make use of only a single intake valve per cylinder, even though they do indeed feature 16-valve cylinder heads. The remaining intake valve cracks open slightly-just enough to prevent unburned fuel from pooling up behind itself. Also known as valve idling, the process allows the engine to operate using a conservative amount of fuel at low engine speeds with improved power at higher engine speeds when both valves open and close normally. Even VTEC is tuned differently, with low emissions paramount. As a result, a unique swirl develops inside of the combustion chambers as well as an extremely lean air/fuel mixture, resulting in impressive combustion and fuel efficiency, but not a whole lot of power. At a predetermined engine speed, the secondary intake valve opens, at which time the valvetrain operates, as you'd expect. Unfortunately, overall lift and duration don't increase like with traditional VTEC engines. Unlike performance i-VTEC cylinder heads, economy i-VTEC top-ends also exhibit an awkward groove cut into the walls between each intake valve, which plays a role in their single-valve VTEC operation, but costs in terms of airflow and performance. To the disappointment of Honda fans everywhere, as of the 2012 model year, only economy i-VTEC engines are offered. Underneath, economy i-VTEC engines share some of the same characteristics as the performance-oriented K-series. The blocks are essentially the same, the crankshafts are similar but not as thoroughly counter-weighted, and their connecting rods share similar geometry albeit a generally thinner and weaker design. Their pistons are where most of the differences lie, though. To help with emissions, many economy i-VTEC pistons feature a rounded dish on top that, together with their curious intake valve operation, help further promote the swirling effect. Economy i-VTEC engines are also missing under-piston oil squirters (although provisions for them are still there), which help promote lower temperatures but aren't necessarily needed when upgrading to forged pistons. Underneath, a more conventional stamped-steel oil pan can be found on most economy i-VTEC engines, which is in stark contrast to performance i-VTEC engines' more rigid aluminum versions.

[@willreeves497]

There was actually a 3 stage vtec made in an old jdm EK, meaning it had 3 sets of cam lobes. think it was a D15 engine with economy, normal and then the usual vtec in the top end, and they were supposedly just as reliable as every other d series

[@juhajuaranen9576]

did you mean 3 stage vtec. example 1 stage only 1 intake valve. stage 2 two valves with low lift. 3 stage with high lift???

[@hamikkhachatrian1433]

I had this motor in my Honda Civic ef wagon it’s a d15b in which it has three stages of vtec. Also has two vtec solenoids instead of one Which is a pain in the ass to calibrate or tune lol not a great performance motor but I got 29mpg in that thing soooo.... I’m not complaining 😂

[@willreeves497]

@@hamikkhachatrian1433 that's the one i was thinking of with the other extra solenoid lol, pretty sure they have the second most HP from a stock d series too (;

[@banuke80]

you lost me when the vtec started kicking in yo...bwaaaahhhhhhhhh

[@clarencebruton603]

What if you get a Vtech-E engine with the VTC could you just swap out the stock cam with a high performance one to get the power of a K20?

[@fgjack1264]

So i had a 1996 accord. The vtec kicked in at about 2500. That would be classified as vtec-e correct? Just curious :P

[@n0ti5]

I'm pretty sure you had a f22 sohc normal lift changeover vtec. One of the only vtec-e engine that is marketed as a vtec-e that i know of in north america is the civic vx's d15. The other engine is the vfr v4 engine that's kind of a vtec-e.

[@fgjack1264]

Awesome, ty

[@drasticoperez994]

I have a 97 civic ex D16y8 with vtec-e in fact..

[@n0ti5]

Drastico Perez, thats interesting because a y8 head is a vtec head, unless it was swapped with a d15 head its not "in fact" a d16y8 vtec-e.

[@liamanderson2772]

Great explanation man. Understood completely

[@mrxyz2k]

Thank you Before I saw ur education video, I thought i-VTEC is VTEC for injection engines, not Carburetor once. Now I see it intelligent VTEC due adding of VTC. By the way,Is it correct that Honda’s turbo engines use t-VTEC?

[@H74ver]

Hopefully I don't have any mix ups, have proof read it a few times and added corrections to auto corrects that mixed up VTEC, VTC, i-VTEC and VTEC-E. Let me know if there is anything incorrect. I have this saved so I don't have to keep typing to explain. Let's use the K series for example. It has performance i-VTEC engines that feature VTEC on both camshafts, economy i-VTEC engines that feature VTEC only on the intake side, and the other economy i-VTEC engines that feature integrated exhaust manifolds. With economy i-VTEC, it doesn't "kick in" like traditional VTEC, its for fuel economy lol. Basically the economy i-VTEC only "kicks in" when driving like a grandma with a steady throttle and not the lead foot like her grandchild lol. It is not like the iconic SI with performance cams that kick in around 5k RPM. And yes I know VTEC kicks in at different RPM then 5k on the SI, but is it performance or economy? VTEC is meant to have high performance at high RPM and low fueI consumption at low RPM period, i-VTEC just made that more intelligent and confusing with its three types of i-VTEC lol. R18 engine for example is a version of an economy oriented i-VTEC that is different (even different then VTEC-e, 3-stage i-VTEC). Under the right engine load and engine speed conditions the eco i-VTEC system switches to a cam that delays the intake cam closure by extending the duration so that the piston pushes out fuel-air mixture back through the intake causing the engine to operate in an Atkinson-Cycle mode. The loss in power from going into the Atkinson cycle is compensated for automatically by the ECU opening up the throttle more (without you having to adjust with your foot on the accelerator). So it improves fuel economy two-fold by (1) reducing pumping loss by opening of the throttle body plate to give less restriction to the intake path and (2) going into the Atkinson-Cycle which uses fuel more efficiently by having a longer combustion stroke than effective intake stroke giving more time for the fuel-air mixture to combust. This also decreases emissions but who cares about that lol. There is no VTEC characteristic torque bump either. VTEC is a tricksy hobbit. All kinds of conditions. Engine RPM, vehicle speed, engine load, throttle position, coolant temperature, oil pressure etc. Can't just think RPM with VTEC kids, so many variables in this equation. Okay Economy i-VTEC explained: Although similar in many ways, the economy i-VTEC version of Honda's variable valve timing is different enough to command its own nickname. Much like Honda's emissions-conscious VTEC-E of the mid-1990s, impressive power figures were not the primary concern when developing these engines. Most notably, their exhaust camshafts are stripped of VTEC and their intake camshafts feature only two lobes and two rocker arms per cylinder instead of three. Prior to VTEC engagement, economy i-VTEC engines make use of only a single intake valve per cylinder, even though they do indeed feature 16-valve cylinder heads. The remaining intake valve cracks open slightly-just enough to prevent unburned fuel from pooling up behind itself. Also known as valve idling, the process allows the engine to operate using a conservative amount of fuel at low engine speeds with improved power at higher engine speeds when both valves open and close normally. Even VTC is tuned differently, with low emissions paramount. As a result, a unique swirl develops inside of the combustion chambers as well as an extremely lean air/fuel mixture, resulting in impressive combustion and fuel efficiency, but not a whole lot of power. At a predetermined engine speed, the secondary intake valve opens, at which time the valvetrain operates, as you'd expect. Unfortunately, overall lift and duration don't increase like with traditional VTEC engines. Unlike performance i-VTEC cylinder heads, economy i-VTEC top-ends also exhibit an awkward groove cut into the walls between each intake valve, which plays a role in their single-valve VTEC operation, but costs in terms of airflow and performance. To the disappointment of Honda fans everywhere, as of the 2012 model year, only economy i-VTEC engines are offered. Underneath, economy i-VTEC engines share some of the same characteristics as the performance-oriented K-series. The blocks are essentially the same, the crankshafts are similar but not as thoroughly counter-weighted, and their connecting rods share similar geometry albeit a generally thinner and weaker design. Their pistons are where most of the differences lie, though. To help with emissions, many economy i-VTEC pistons feature a rounded dish on top that, together with their curious intake valve operation, help further promote the swirling effect. Economy i-VTEC engines are also missing under-piston oil squirters (although provisions for them are still there), which help promote lower temperatures but aren't necessarily needed when upgrading to forged pistons. Underneath, a more conventional stamped-steel oil pan can be found on most economy i-VTEC engines, which is in stark contrast to performance i-VTEC engines' more rigid aluminum versions. NOW Performance i-VTEC explained: Unofficially known as performance i-VTEC, such engines feature Honda's most impressive valvetrain to date. At the heart is something you've heard of: VTEC. Like its predecessors, inside the cylinder head lies Honda's hydraulically operated variable valve timing system. Simple and elegant, VTEC allows the engine to alternate between two different camshaft profiles depending on various conditions. In terms of i-VTEC engines, though, there's more, and it's called Variable Timing Control (VTC). Here, a specialized camshaft gear allows for continuously variable intake camshaft phasing throughout the RPM range. Based upon all sorts of things that the driver needn't worry about, like camshaft position, ignition timing, exhaust oxygen content, and throttle position, a 50-degree range of camshaft phasing can occur (25-degree range on K24A2). Much like VTEC, the camshaft gear is electronically controlled and hydraulically driven, resulting in reduced timing at idle and advanced timing at higher engine speeds, which increases valve overlap and power. Fittingly, the "i" in i-VTEC stands for intelligent and, together, VTEC and VTC offer an unprecedented balance between performance and emissions. The advantages up top span beyond the valvetrain. In terms of airflow, performance i-VTEC cylinder heads shame even the best of B-series top ends. This is, in part, due to oversized valves-2 mm larger than B-series VTEC engines. Performance i-VTEC engines also feature more optimally shaped intake and exhaust ports when compared to the B-series and larger ports when compared to other K-series engines. On the intake side, they form a nearly straight path. On the exhaust side, they're free of the humps typically found within B-series ports. K-series engines also benefit from sophisticated roller rocker arms, which reduce valvetrain friction and allow for all manner of billet camshafts. This is in stark contrast to older Honda engines that feature standard, pad-style rocker arms. Down below, every 2.0L engine features a 86mm bore and 86mm stroke. Also known as a square design, such engine architectures are a good compromise between decent low-end torque and adequate top end power. The 2.4L engine's over-square design, which features a longer stroke and slightly larger bore, results in more torque, but at the expense of any additional top end power. In terms of crankshafts, each is forged from high-quality steel, but only performance i-VTEC versions feature a fully counter-weighted design. Performance i-VTEC engines also feature under-piston oil squirters for increased cooling, stronger connecting rods and, generally, higher-compression pistons. In terms of North American-spec and Japanese-spec K-series engines, the K20A2, K20Z1, K20Z3, K24A2, K20A, and K24A all share a similar i-VTEC architecture. Although engine geometry and ancillaries such as intake manifolds, throttle bodies, and exhaust manifolds may differ between them, they all share more in common than not and make up some of the most desirable K-series engines

[@Noswolf]

vw passat 3b 1.8 liter non turbo has dual intake runners so it switch from low end power to high end power :)

[@IllPearce]

And all this time i thought it was for making phone calls

[@jamessealey1743]

Don’t use long words like vastly, use words like greatly or small big and things like that. Great work 👍

[@n40tom]

Hey genius , greatly is a larger word the vastly. In fact it is vastly greater.

[@kavandadgar7446]

yah it was vtec and not the nos that beat the jetta lool

[@Dustrunnersauto]

OnlyINTheHood when the joke goes right over your head.

[@dwayneIs371]

I think he meant without Vtec the S2000 wouldnt be as powerful even with NoS. It would be a weaker engine

[@jab1a]

Very informative and just what I was looking for. Thank you

[@Dustrunnersauto]

Thanks 🙏🏻

[@tetradb_]

vtec yo, i-vtec no yo, true story bro

[@suleymancakr6724]

K20 is ivtec. Not true

[@NISMOIZKING]

I wouldnt say "increase torque at low rpms" I would say not lose as much as a performance cam. Thats the purpose. To have that over lap at higher rpms while keeping the stock cam profile down low. Anywho Nissans NEO VVL was better

[@rowyourboat5003]

I don't know why can't I hit the thumb up,, so I'll will right here.. "SUKA"

[@ridernakal]

You Malay? Because like in Malay is "suka" also im malaysia

[@malayneum]

malaysia boleh! like sikit.

[@colgatetoothpaste920]

Fuck you

[@rahmanshuib4295]

Ice Bear beruang bongok nak mampus...good job ice bear..

[@colgatetoothpaste920]

Rahman Shuib diam ah sepahtu tk kelakar

[@kevinwhyte5788]

Hey brother Question-I have a 2002 Honda CR-V but it’s really bad on fuel so am wondering what’s the reason for that and is there something can be done about it.

[@deloncleaves3413]

I love it when my VTEC makes that cuckoo sound

[@ruanrocharbr]

really nice video man! i loved it!

[@Dobermann.Kennel]

one be like vrooom the other be like vrooovroom!

[@moiqtheplayer]

I guess that Honda should use the name of I-Vtec-P and I-Vtec-E to distinguish them

[@H74ver]

Would be nice

[@moiqtheplayer]

@@H74ver it would, thanks

[@jacobcolonel4278]

when vtec kick in yo

[@csteger03]

You mentioned but did not explain valve overlap and how it pertains to VTC and/cam phasing. I understand keeping it simple but it’s a pretty key element of the system

[@neel3788]

Dude, I rarely do comments on KZbin videos, but your video i had to. You made the whole video without a single visual explanation tool, let be a drawing board or some kind of image or any animation of available. I mean for full 6 mins you only explained by talk.. I mean wow.. Take some efforts for using those tool. It will be very very helpful for newbies.

[@RagingBullNuts]

Swapnil Dhage 0:42 2:52

[@loco4813]

Very good video man actually could sit and listen and good shit to say keep it up

[@earlsmith9517]

vtec is variable valve timing ivtec is variable valve timing and variable cam timing

[@collije]

Excellent and clear explanation. Kudos. You have a new sub 😊