What is VTEC and How Does it Work?

[rodriguez4548]

Check out my channel!!!

[DidYouSeeTheSunrise]

lol at knowning that all the asian ricers are on here so they won't stutter next time somebody asks them if they actually know what vtec means. Was told by friend that only hondas have variable valve timing. lol.....

[ginarna86]

hey man, i have a 94 prelude and my vtec isnt working...just an oil pressure problem or what else stops it from working?

[vtecnegro85]

Ummm news flash. We're killing big blocks now

[DJzSith]

1:42 VTEC KICKED IN YO!!!

[willisd432]

you got an oil leak bro.

[maddpepe313]

VTEC just kicked in yo

[shoprat17]

Not that a honda is gonna be killin big blocks anytime soon (but as a realible vehicle i do like them) the late 80's early 90's stanger bangers were a joke, best they could do was the about crappy 302, about the worst motor ford ever built (in the trucks the 300 l6 (way better truck engine) would pull that 302 around all day not to mention last at least twice as long)

[SleepnGrunt]

@addidastwist69 the longer duration on the intake stroke gives your cylinders more air/fuel to burn which means a bigger explosion thus more power

[adidastwist69]

How would a Vtec make the engine better? What does it improve?

[suzukiholdenman]

@adidastwist69 top end power i guess

[TheLastMag]

Wow how cool that Honda is so proud of them self for technology Lexus engineered in 1997. (VVT) And Toyota owns Lexus so it only logical that Honda stole Toyota's technology. :D

[tiebo0]

@TheLastMag Oh, 1997? Honda started using it in 1983.

[hernandadmx]

@TheLastMag vtec was invented like in 85 or even before

[dgurevich1]

It is a two level system, meaning the variety of timing is limited to two.

In Toyota's system (VVT-i), the entire camshaft angle is regulated, based on the oil pressure, meaning the higher the revs - the longer the valve opening.

Also, the later Dual vvt-i also changes the exhaust camshaft angle.

[giovanni8963]

I wanna vtec my gf =]

[PatSchemly]

This video is wrong. Science cannot explain vtec in a video, book, or anything else. Vtec cannot be shown or illustrated. Vtec simply "Kicks In Bro". DO NOT question vtec or or vtec will find you and kick in.

[hernandadmx]

@PatSchemly hahaha NICE lol

[FlowzTheRhythm]

nice vid, really explained alot especially the animations. The vtec motor, i mean thats just hondas way of...doing things. I wonder if most japanese car companies realize that american and european cars surpases them or if they even realize that there is such a thing as engines with 8 cyclinders or more. The gtr is nice but i want to see more cars similar to the gtr being produced in japan. I love my M3 and my Mustang gt and now im looking forward to the new camaro zl1. No jap cars in my home:)

[skatecodered]

If you want real speed get a 5.0 mustang and super charger it :D 

[BASSCHAMP101]

@skatecodered I beg to differ. Get a DSM, rewire the 'pump, get some bigger injectors, a larger turbo and some tuning software. Rustangs will fear them.

[Ub3rNo0ber]

@skatecodered Yeah until that XXX 5.0 block LITERALLY breaks in half at anything more than 500hp

[skatecodered]

@Ub3rNo0ber I have seen 5.0 blocks get over 800 hp

[Ub3rNo0ber]

@skatecodered Maybe a Dart based 5.0, but not a stock XXX. There is next to no material in the lifter valley. After around 500hp that's the weak point and they literally break in half. I've built a couple them.(One 302 and two 331s) With a lifter valley girdle, a lot of stress riser smoothing and billet splayed mains, you can stretch them to 600ish.

[skatecodered]

@Ub3rNo0ber The only mustang that is making 800 hp is a gt500!! Gts will top at about 600!! My friends bro has a 88 gt 5.0 supercharged with gt40 heads its a beast

[KarstonLikesMustangs]

@skatecodered you can make any mustang 800hp.

[poopitypaintsh]

@skatecodered my 87 integra could keep up. hondas eat mustangs for dinner. no offense

[hernandadmx]

@poopitypaintsh v6 mustangs...

[poopitypaintsh]

@hernandadmx my brother had a 1986 honda civic si hatch running aa B16a1 that has smoked a 2003 v8 stang

[yellowcow13]

Thanks for the informative vid

[eos420]

Oh and awesome video! I just got an 05 v6 accord with vtec and was curious about it. Is it normal to feel the engine change into the different modes?

[jiaminglin6]

VTEC doesnt make your stupid little Honda any faster, it still only have 106hp

[eos420]

@jiaminglin6 my v6 has 240.... ;) STOCK

[dacarfreak2000]

@jiaminglin6 K20A Vtecs creates more than that.

[MAXXFIGO]

nice explanation!!!means a lot for me!!!

[marek0086]

Im pretty sure VTEC is NOT an acronym.  Its stands for Valve-TEChnology.

[jordtizzle]

@marek0086 Variable Valve Timing Engine Control

[ellz2012]

When i was a kid VTEC was a kiddie computer company.

[simow06]

Excellent video, VTEC is hard to explain but you have done an excellent job.

[avsrule247]

What is the benefit to this? I don't know much about engines.

[DrunkenCarGuy]

@avsrule247 read a book. then you know why a more aggressive cam lobe with higher lift and duration keeps the intake valves opened longer, letting more air-fuel in the combustion camber, producing more power.

[polskiewinnipeg]

@DrunkenCarGuy still a honda lmao

[shawnzzzzz13]

@avsrule247 vtec kicks in more power.......easy said

[marco33717]

@risendrummer14 yeah!!!!! is easy I know how

[hardworkingmlm]

Smart invention, too many dumb people in this world to understand WTF is going on and why

[NoGluv00NoLuv]

MMMBAAAAAAAAAAAAAAAAAAAAAA

[weelgunny]

So THIS "variable" valve timing is more like 2 speeds. Switches either to low rpm or high rpm timing.

[sahtekar1000]

i agree with risen.Vtec is not made for low rpms.it best works at high rpms.

[fightfest]

Fuckin magnets how do they work?

[braaup]

That's cool as fuck!! Thanks dude!

[rickslick730]

That's why I say "THAT VTEC KICKED IN YO" when i win.

[Squishyisbeast]

sounds exactly like my john deer when i cut long grass

[FameBaNaNaZ]

You don't want it to run at all times trust me, You'd need an oil change like every day.

[blueeyesseto]

Hey Eric

i noted you kept sayng it was like VVT which is and isnt true to my knowledge VTEC changes the duration of the valve being open while VVT changes the intire timing of the cam to make it run with a different timing so as i understand it Vtec holds the valves open longer while VVT changes the engines actul timing from advanced -neutral -retarded to one of the others to make the engine run at optimal performance meaning spark time needs to be changed so Vtec is really a prototype for VVT

[NITECOREPD]

VTEC= dual stage valve train MIVEC= 3 stage valve train (more low end torque compared to vtec)

[32mrlopez]

Yeah...is very funny ....hahahahahahahahaha... How funny it is..... Solenoid.. Hahahahahaha

[SpankDeath]

@32mrlopez Im pretty sure hes saying there just the exact same solenoid,IE alot of thought wasnt really put into vtec,its like overdrive on a trans just for the motor.

[RingSight91]

@SpankDeath On the contrary, there was A LOT of thought put into creating the VTEC system. Honda used to supply engines to the McLaren Formula One team from '88 to '93 or so. Back then teams ran 1.6-liter V-6s with turbos. Tell me, how do you get 700 to 800 HP from 1.6 turbocharged liters and not have the engine explode on you AND not run out of gas during a 70-lap race? No in-race refueling until '94. Power and Fuel Economy in the same engine. That's how VTEC came to be.

[jugjuggz]

V-TEC JUST KICKED IN YO!

[SuperBboy95]

The same applies on an E-VTEC right???? pls help

[hondatrix]

@SuperBboy95

e-vtec keeps one intake valve closed or opening less than the other in the same cylinder..and when "vtec" is activted, they work at the same rate, no high performance from the e-vtec...sorry

[driftin40]

Im trying to install v tech on my lawn mower.

[WowzaBoyz]

@driftin40 a dude in my neighborhood is actually attempting to do that

[driftin40]

@WowzaBoyz haha wow. Whats next leaf blower?

[risendrummer14]

is it possible to activate the vtec to work all times?

[freezysworld]

@risendrummer14 good question aha

[russ13b]

@risendrummer14 yes, you basically swap the solenoid so the oil always gets through, supercharger kits do this, but without forced induction it'll be terrible. search for stuck vtec videos.

if you've got one and you're thinking of doing this, don't. honda know a lot about engines, and they've done them like this for a reason!!

[VivaLaTalon]

@risendrummer14 yes buy a evo its full time power

[bobhateschris]

@risendrummer14 the engine wont run well with a high lift cam in lower rev ranges, it would result in too much fuel going through to the engine, which isnt needed. This is why VTEC is activated at a certain rpm. The extra fuel can be used efficiently by the engine only at higher rpm's

[hondatrix]

@risendrummer14

Yes, but oil pressure might be TOO low to feed the whole motor...or even to activate the VTEC..

[Dshook88]

@hondatrix considering the amount of oil needed is only enough to activate the locking pins in the secondary rocker arms, im sure the engine would be fine. Although i don't have a lot of experience on Honda's system, it would make sense that they would probably use a higher volume pump for Vtec engines.

[shadowkeeper0]

@risendrummer14 no reason to do that man, vtec improves torque/power at higher rpm. At low rpm the engine works at max efficiency, so if you had vtec activated then, you could lower the torque/power.

[NITECOREPD]

@risendrummer14 no unless u dont want it as efficient

[adrenalynejunky]

@risendrummer14 dont do that dude lmao

[RingSight91]

@risendrummer14 If VTEC worked "all the time" then it wouldn't be "Variable" now would it?

[seniorjohnl]

@risendrummer14 You probably wouldn't want to. The idle quality would suck and low rpm torque would be lower than normal.

[crazyredneckwifknife]

@risendrummer14 obviously, but you'd find the cam isn't made for low rpm so it wouldn't run very kindly

[n9athan]

@risendrummer14 just get a high lift cam

[redwhiteblue91]

@risendrummer14 A standard 16v engine is technically VTEC running all the time.

The difference is, a VTEC has more power low down, because it runs as an 8v engine at lower revs.

So with some clever tuning and engine mapping, they can make it scream like they do when at high revs without sacrificing low down torque.

[vancecoledotcom]

@redwhiteblue91

Only on certain engines such as HX Civics

Otherwise, all 16 valves run at once, and in VTEC, the intake cams open the valves for a longer period of time, allowing a bigger combustion.

(or both intake and exhaust side valves open longer in VTEC in a Double Overhead Cam Engine)

[GertKlinge]

@risendrummer14 Toda Vtec killers camshafts

[skyclawalpha]

@risendrummer14 vtec is controlled by the ecu and can be modified to kick at a lower rpm

[C2DE6750]

@risendrummer14 Yes, you can buy VTEC controller.

[organmastr]

@risendrummer14 i wouldnt because when v-tec isnt on, the car does better ain that RPM range...and then with it on, it does better in that higher range. That's what V-TEC is all about!

[semperfiedausten]

@risendrummer14 it defeats the sole purpose of vtec....

[wesleysuperman]

@risendrummer14 Exactly, Just like having a cam installed in a "normal" car....

[bloodreighn]

@risendrummer14 Yes, but its pointless, they designed the cam so that the power is maximised at all times, ie, at low end the cam gear with out vtec is designed to have good low end power and torque, because of this the RPM power band is only limited to 2500-4000 rpms or somewhat, after that vtec engages were a differentpower band is then engeged buy the differant cam lift and duration causing the power band to then move from 4500ish to 7k+ rpms, so no, dont engage all the time.

[M50SNIPER]

@risendrummer14 Have the solenoid open at all times using oil pressure.

[flamingaxe791]

@Dshook88 Tuning should take care of a rough idle

[Dshook88]

@flamingaxe791 In some cases, yes, but keep in mind that longer duration produces increased valve overlap, and without variable cam phasing, you cannot always produce the greatest desired effects.

The higher you get in rpm, the more duration you require, however, the more duration you have lower in the rev range, the harder the vehicle will run at idle.

The only way to have it all is through controlled variables in valve components. Vtech has more potential then 4 cylinders.

[flamingaxe791]

@Dshook88

I see what your saying, its like having a good sized cam minus the low end torque loss of a ordinary race cam set up.

[fruitydudexD]

If the blue turning thingy..(sorry i dont know the name..) was to be turned 180 contrary to the two red ones..would it mean it does twice the action in one rotation? or not...

[prepaidbrian]

then this is the same for, ECOTECH(chevy) , ZETECH(ford) who was designed by honda and Toyota has VVT...they are all the same

[SpankDeath]

@prepaidbrian the exact reason I wont buy newer trucks that use that shit.

[prepaidbrian]

@SpankDeath Your a cubic inch guy....THUMBS UP

[thirdeyetubewatcher]

Thanks good video

[TheNojik]

0:24

[nata911]

can those pins break?

[christianthebom]

so elongating the time the cylinder is in the intake exhaust stage allows you to run at higher rpms?

[80sguitarplayer]

@christianthebom It allows more air to enter the combustion chamber. More air = more power.

[flamingaxe791]

If I had a Honda I would ditch vtech and through in a nice set of cams. To bad most Honda owners are as dumb as a box of rocks when it comes to cars, all they hear is vtech this and vtech that, how about vtech nothing.

[Dshook88]

@flamingaxe791 I understand your position over Vtech, however, if you were to simply run the same duration and lift profile at lower rpm, the engine would run very rough and maintain poor fuel economy.

It's all about volumetric efficiency and balance.

If you were to apply this system onto a modern, domestic V8, you could have fuel efficiency, torque and top end power.

[RingSight91]

@Dshook88 "Vtech" is a brand of kids electronic learning toys lol.

[flamingaxe791]

VTECh hold back power untill 3500rpm, than its opens up, image if you had that power through out the entire rpm range.

[MiniMullet12]

@flamingaxe791 actually it holds back until 5500

[flamingaxe791]

Why not get rid of vtech and jut give you the cam lift below 2000rpm? That would help with low end torque, oh yeah because VTECH IS A ECONOMY FEATURE!!!

[SizzGoM]

Fuck alfa romeo

[reanimation2000]

@SizzGoM

without alfa romeo would be no Enzo..

without Enzo no Ferrari...

by the way,

if you fuck that much, dont forget to pee :P

[reanimation2000]

Bythe way,

many people think that honda was the first manufacturer to use a variable valve timing system.

That is not true..

Alfa Romeo was the first.

[westwood08]

@reanimation2000 Honda are just best at it :p

[reanimation2000]

@westwood08  some cars are good in some areas.. some cars are better in other areas :)

[iulixxx]

Very good explained

[dirtjump11]

why not just lock the valves in vtec all the time? how come vtec has to engage at a high(er) rpm when you could have it permanently engaged and have more power all the time at all rpm's? There must be a catch somewhere otherwise i think they would have already thought of this...

[TheDustikus]

@dirtjump11 High cam lift/duration does mean more power at higher rpm, yes. But if you have that same high lift and duration at say idle, it's not even going to stay running. At least at what these cars should idle at, do some searching for "big cam" and you'll see several vehicles with high lift cams, they "lope" at idle, need to idle higher, don't pull hardly any vacuum when they do idle. The power band of vehicles like this usually doesn't start till 3k+ rpm, give or take...

[VideoSk8Rs34]

@dirtjump11 it would use too much gas. your mpg would go down by a lot. im guessing

[harlemkiid149]

So at what mph does v tech kick in?

Is is like like a mini turbo charger or a mini boost?

[digmynewsocks]

@harlemkiid149 v-tec dosent kick in at a MPH, it kicks in at a RPM. in my 07 civic SI its around 5700, 5800ish rpm. no its not like a mini turbo, it just gives you a little more power in the higher revs, you can certainly hear it, and you can feel it too, it wont snap your head back or anything like that, but its pretty cool on its own, or even cooler if you wanna build on it, like everything else, it depends on what you wanna spend.

[igogosh]

@harlemkiid149 vtec kicks in under load after 3000 rpms on my 6th gen accord v6 and gives considerable pick up power all the way to 5k or 5.5k rpms if you floor the pedal. I like the way it becomes savage when you do this. When you drive normally you can't hear the engine much. The thing gets to a 100mp/h without a hick up:)

[SpankDeath]

@igogosh a honda savage?nah,fast sure,but savage,well Ive never heard a honda thump,just whine.

[igogosh]

@SpankDeath I refer to the performance, not the sound. V6 accord revs smooth when the injectors work properly. Drive one, their v6 are fun:) I am not racing, just like spirited driving.

[96svtjsb]

I would rather just stick to my 32 valve V8.

[PistonFreaks]

1:41 VTEC kicked Yooooo!!!

[rizegraymon1]

so now i can tell the honda kids that vtec is not some kinda turbo charger that give them 50 bhp after 5000 rpms ?

[tmkongen]

@rizegraymon1 Tell them to look at the facts. If they don't get it after they are simply to stupid and should shut up :p

[monkeyman6773]

thats dope dood thanx for the video. i always wonderd how that worked. this video is super good too man.

[artakisthebest]

Thanks eric, this is the only explanation of vtec on youtube that i have found which comprehensivley explains the vtec system!! thanks so much ive finally understood it, what kind of oil would a vtec engine prefer then?

[Nokomp007]

@artakisthebest Honda genuine or Mobil 1 fully synthetic

[staircast]

So your telling me that the third rocker arm lifts the valves higher and longer and still makes 0ft-lbs?

[TeK9KBC]

Okay so what is iVTEC? (NOTE: the 'i')

[jufrabappa]

great video !!!

thanks for the help and the info!!! keep on the good work!!!!!!

[Phoenixfire360]

Thanks for the quick summary good sir.

Is this different than cam phasers or is it the same thing?

[eshitgha]

LOVE AND KISSES AND VTEC GOT TO LOVE THE MUSTANG WITH VTECBAWAAAAAAWWWWWAAAAAA

[eshitgha]

and do mustangs come with vtec and does it kick in hard like BAWAAAAAAWWWWWAAAAAA

[eshitgha]

fucken hat mexicans

that is niot what vtec stands for puto

[tintanton6]

Next time explain it in the English language. Thanks!

Sincerely; I don't know what the hell you just said. o.o

[texaspete1957]

wow....he explained that pretty well

[stellaspeed10]

I love it how when someone as me how does Vtec work I said the samething and they said I don't know what the F i'm talking about... Now I see this video and everyone is eating it up.

[nealongreene15]

@cb7pwn Huh.. interesting, I could never hear when it kicks in because i'm usually 4-5 car lengths ahead. But I'll take your word for it ;)

[The96jaime]

does this engine make your car any faster?

im a rookie with this kinda stuff can you explain?

[nealongreene15]

@The96jaime A turbo works better... This is more for economy and gas efficiency.. If you want speed, go get something with a 4g63 in it or an evo.

[1n9a9n4]

my 1996 honda accord doesnt have a vtec...therefore i guess no balls??? haha

[droubie66]

what is its purpose, to save gas?

[b18c5integra]

@droubie66 yes. That is the only reason for vtec, have great mpgs when in lower rpms (usually vtec cross over is at about 4500 or so rpm), however when you get into the higher rpms the solenoid activates locking the middle arm into place to allow more air and fuel to go in, and more exhaust flow on the way out.

[autocrossstar17]

Sweet vid, well done. VTEC=god mode

[Diemorder]

this is the first vid i found that made me really understand the mechanics of the system

[achillesV]

variable valve timing, and i learned something today

[USCisgay]

Virtually

Torque-less

Economy

Ca

[IROBOTSURVIVES]

@USCisgay fuck torque .

[wtl1964]

@IROBOTSURVIVES hual a boat or people then say that id rather have 500 ftlbs of torque and 250hp than the other way around

[TheEsevee]

@MBL0CKG yea nvm I get how vanos works now lol

[Nelis1992]

so when vtec is active, the outer two rockerarms (sry for bad english) dont do anything?

[Nelis1992]

i always wonderded how vtec works

i get it now, very well explained

thx

[LordChole]

Hi, sorry for my english.. can you send me message, when the V-tec started in Honda accord 2.0/ 1999 ? Thanks

[QuakoVide0]

now i get it

[fayth78a1]

wow, as a mechacnic( and speller) in traning, i gots lots to learn...very nice info too.

[Mr4x4forlife]

it looked like it had the same lift and it was made to help in time of floating valves.. so vtec is just lame.. i will stick with my v8 motor and blow pass a vtec..

[Ben762x51]

Great explanation. Thanks for posting it. Quick question. Before vtec you'd be running with 16valves, but when vtec kicks in you'd actually be running 20 valves total right? Does that make sense? 3 intake 2 exhaust per cylinder.

[Dave424123]

@Ben762x51 No, the v-tec rocker isnt connected to a valve, its just getting its lift and duration from the center lobe and transfering it to the two intake rockers either side of it

[Ben762x51]

@Dave424123 Ok, that makes sense then. Pretty cool. Thanks for the reply.

[ACMiLan1113]

anyone know the difference between VTEC and i-VTEC? Is there any point in having VTEC in a car with auto transmission?

[kinesium114]

i think vvt-Li is like vtec. vvti is just for fuel saving? the l is extra lift?

[mecon2]

Nice vid, clear and easy to understand :)

[NIKOSAXO83]

hi!!can we make this vtec system work from very low rpm ?

[dext1991]

wow thats is 10 times more simpel then i tought O,o

[IDroppedMyBrain1ce]

If been wondering what the hell is a vtec !! thanx man !

[itzGTIbruno]

i was refilling the washer fluid in my moms 2010 camry and notices on the engine it says Dual VVTI does this mean it has variable valve time at two different points like clicks at 4500rpm then 6000rpm or something?