Honda - How VTEC works

[sweethouze28]

hahahah...V-TECH...GAY-TECH



[37kazzmark]

@sweethouze28 fark ooff cunnt. haha

[eshitgha]

black guy making a vtec sound

hella sick bitch

[Anoush13]

VANOS systems in BMW engines don't use oil pressure to move the cam shaft. How do they work? Apparently they work with a set of gears at the front of each cam shaft.

[TheTyler8166]

damn i love vtecs!

[caracont]

vtec it's designed for high rpm range and high compression ratio, you probably can blow the engine with a high boosting turbo

[cras17]

Mine doesn't kick in till 6000. I want to get a controller like Hondata to lower it.

[dwnrety1]

VTEC:

what it means to mechanics: Variable valve Timing Electronic Camshaft control

what it means to ricers: my car is invincible.

[NZXTInerTia]

@dwnrety1 Vtec does go nice with my GReddy turbo though lol

[lawlerskates23721]

just get a supercharger haha

[TheDM75]

@lawlerskates23721 A Supercharger means boost, this means fuel saving. Asswipe.

[dustziggy]

Meh...all cars are similar now. If any car DOESN'T come with variable valve timing now id be very surprised.

[SuperchargedMustang5]

So this is v tec?

[NEVERENDS90]

why not the v tec activates at 1000 rpm? produce more power from 1000 rpm?

[mieswiss]

@NEVERENDS90 for i-VTEC engine..vtec kick from 2200 rpm..produce more power..luv it..

[VTeckin11]

@mieswiss no on a real i-vtec engine, like a k20a2/z1/z3 etc it cracks at 5800

[lizardbizkitz]

@mieswiss Where did you get this info from?

[wacky0pker]

@NEVERENDS90 I assume the idea is to save fuel, as it uses more fuel when v-tec is kicked in. So any revs under 4500 it's saving fuel, which is normally the rev range for slow moving traffic or cruising at a set speed. Great idea i think.

[ngatea21]

@NEVERENDS90  You can get a computer, that allows you change when V-tec kicks in, not to sure what it called though sorry

[Mirron1]

@NEVERENDS90 because most cars idle at 6-800 rpm....that would be one rough take off from 0mph. when just cruising around town, usually engine load is only at 3000-3300 maximum. 4500 is a good number because if you're driving above 4500, you're obviously racing

[Lowrida3369]

@NEVERENDS90 4 clyinders dont make fuck all tourque at low rpm

[McKaamos]

@NEVERENDS90 Because that would destroy the engine's ability to pull the car from standstill in a manageable fashion. With a constant activated VTEC (or just plain sharp camshafts, wich is the equivalent) you can only shoot away like a rocket, or stall. There's no torque left at low RPM, so you cannot just take your foot off the clutch and get rolling. It will stall unless you put the pedal to the metal.

[XHyperxNovaX]

@NEVERENDS90 You wouldn't have the torque at 1000 RPM.

[littleenglish]

@NEVERENDS90 to save fuel

[DRIFTINGIN808]

@NEVERENDS90 you can have a vtec controller so you can choose when you want vtec to engage. you can also change your camshaft lift and have your vtec engage 100% of the time. these are known as "vtec killers"

[dilirent]

@NEVERENDS90 so you can get better gas mileage and for the engine to last longer when not being raced, it was designed as an everyday drver/ track car for the not so rich young people

[jfreundST1]

@NEVERENDS90, it's all a matter of air velocity. It has greater effect later. earlier it is more benificial to have less lift because it increases velocity. after a certain speed, the short lift hinders velocity instead of helping it, soo that is when v tec kicks in and increases lift.

[Artgallo]

who ever designed VTEC is a genious, is like taking your stock camshaft out and putting a modified cam in "on the fly" when the engine hits 4500 (or so) rpm's (unless you got a VTEC controller), just genious, damn japanese

[teribleislas]

i like the way that they explain it but if you wan stronger performance on a car you'll need to sap the V tech out is use less (Y people upgrade a lot Honda) V tech is good for regular use not good performance ...

[sniffinwhitelines]

I'm very sorry I dont understand, anyone care to explain (:

[FancyGapClawhammer]

A camshaft has two different measurements I guess you could say. Duration and lift. Duration is how long the valve stays open and lift is how high the valve stays open. The cam lobe is what these measurements are for, you can see the cam lobes (red) in the video and the extra one (green) in the video. The two red lobes are normal measurements for the engine. Once the engine reaches a certain RPM, a computer tells the middle rocker arm to come down so the middle lobe will hit the arm.

[FancyGapClawhammer]

Since the middle lobe is the one with the high lift, it causes the intake valve to stay open for a much longer period of time, allowing more air and gas to come into the cylinder. More air and gas equals more power.

[snyperiflex]

Honda dont have bad low-end power...they just have good high-end

[glennvanderakt]

that's not the point, you are placing comments on the wrong video.

[glennvanderakt]

@GarrettKeetley  your comment sucks

[pancakewafflebacon]

looks to me like more probable engine problems

[TheDaytonaMan]

It's pretty interesting. Too bad every single ricer in the world uses it.

[YamahaMonster660]

Vag-tech is more like it.

[NikolasHonda7]

....HONDA JAPANESE SPECIALIST.... R.E.S.P.E.C.T.

[csk0bw]

i heart vtec

[deadrabbits19772]

the point when the pin goes through to connect all three, must be a weak point..

[98integraGSR]

@deadrabbits19772 not really, so long as you're tune properly for it. The best way is to do two complete tunes, one without VTEC, and one with VTEC engaged from startup, overlay the dyno graphs, and set VTEC WOT crossover at where the HP curves intersect. Using this message, you'll probably hear VTEC, but you won't even feel it... Whenever people say they can 'feel' it, it's because their crossover is set too high and the 'bump' they feel is due to lost power from being on the low-lift too long.

[sahirbutt4008]

@98integraGSR can u plz tell me the abbrivistion of VTECH???

[98integraGSR]

@sahirbutt4008 what? Learn to type, then ask again.

[PandaBearSlayer]

@sahirbutt4008 DERP

[joescivic]

@98integraGSR so what about a stock engine from the factory with 3 lobes on the cams. because they do actually pull faster, and you feel it. there are different kinds of VTEC. economy VTEC, and what some call "performance" VTEC

you're basically saying my stock engine is losing power from the way it came from the factory. even after i got my motor tuned, and vtec set 1000 RPM's lower for the low boundary, which is 5200, and the high boundary kicks in at 5800, i still feel a pull

[98integraGSR]

@joescivic if you feel a "bump" at VTEC crossover, it's set too high. Period. Dyno tune the low maps and high maps independently, and overlay their power curves. Where they intersect is where your setpoint should be.

[joescivic]

@98integraGSR mine was dyno tuned from a guy named Mase who flew here from Florida to tune some cars. hes an awesome tuner. he did mine right. however, you still feel a SLIGHT pull and you can BARELY hear the crossover. stock, the motors VTEC is set at 6200. mine is at 5200, then 5800.

what i was saying before, was, if the k20a2 came from the factory set at 6200, and you hear a huge difference in crossover, and definitely feel the difference, how did it lose power when you're gaining speed?

[98integraGSR]

@joescivic Think about it this way- if you feel a bump in power at crossover, that means power is jumping at least 8-10whp at crossover (that's about how much power it takes for the ol' butt dyno to notice). If power is jumping that much that fast, it's because the car was on the low cam profile too long and was losing power that it could have been making on the high cam. If crossover is set right, you'll hear crossover, but power delivery will be smooth, without a spike. Get what I'm saying?

[joescivic]

@98integraGSR ahh, ok. but yeah, VTEC is hard to tell when it has kicked in now. i have a hard time with Kpro also, sso all i do now and then is just datalog it. i dont want to mess with Mases' tune.

[98integraGSR]

@joescivic BTW, I have an RSX-S now instead of the GSR (it met its end at the hand of a guardrail... Kpro is a little wonky to get used to compared to tuning an S100 or Crome... And tuning the different cam angles is a BITCH. I wanted to gargle antifreeze when I was trying to tune after installing my supercharger.

[DestroyerOnHalo]

...... to produce more power. gotta love it

[Yourmotwashum]

so all it does is to take more air in? lmao!

turbo vtec= fast fuel drinker

[themonster54]

if you knew about engines, you wouldnt laugh at that. how else do you make power in an engine?

[mattchew911]

@themonster54 Simple.... Turbo Chargers lol

[abluefuzz]

u dumbass that doesnt know shit about cars

[Yourmotwashum]

yeah im pretty dumb, thanks for noticing! and by the way, i dont see a lot of vtecs at my uni so yeah, i guess the majority of your so called "dumb ass" go to uni as well ...^^

i thought i was the only one!

[oldboi1]

4g63 does not ring any bells for me ?

[oldboi1]

people say that but if u just egnoledge it by drivin it right eg shift point gear speed so u dont struggle with the torque

[SRIreland1]

The older non VTEC Honda engines are much better for acceleration, such as the f20a series.

They have good power and a lot more torque than the VTECs.

The f20a5 Accord can out accelerate Civic SiR's, 1.6 MIVEC Colts(Mirage Cyborg), if kept in good condition.

The thing about VTEC engines is that they are indestructible and are great to build on..

[Egsforlife]

you have to think vtec was not made for performance it was initially made for fuel economy during heavy loads

[Arai4lpinestars]

chopmop08

Yes, 4G63s are bulletproof. But we are talking about Honda VTEC engines, focusing in normal aspirated power.

If you want to race a Honda i-VTEC turbo, you go right ahead and hunt for ladies in an Acura RDX.

[chopmop08]

nice! but not the best honda motor nor does it top the indestructable 4g63 im my talonxD DSM rules

[FrightfulAccountant]

Defenetly one of the best engines ever. ^^

[oldboi1]

vtec is an amaizin desighn very very good engines seconds to none in design work for power and econemy i love jap cars . but honda's vtec is great

[SRIreland1]

The problem with VTEC engines is the low torque though.

[idontcare80]

VTEC engines have quite a bit of torque for their size, it's just that it's all at high revs.

[cburn67]

I have an 02 civic and I have noticed that @ high rpms is when my civic picks up. So true

[mrkd225]

true in most cases, but dont forget single cam (SOHC) they have a much broader torque band starting at lower revs, usually with a single cam VTEC, its torque numbers are greater then the horsepower, coming in good hand when city driving, or towing, or any other constant load situations.

[idontcare80]

The number of cams has no effect on how much torque an engine will produce. The torque output of an engine depends largely on its displacement as well as its efficiency (VE, mechanical efficiency, etc). It is good to have a good amount of low end torque for daily driving but an engine with more torque than hp will not necessarily have more overall torque than an engine with more hp than torque.

[srt4erick]

no an engine with more RPMS and torque will have more overall horsepower. people dont realize that horsepower is a by product of torque output and revs. Torque X RPM = HP. hondas get all their super high horsepower from the high revving engine. they still have jack shit for torque.

[idontcare80]

I am very aware of the relationship between hp and torque. Honda engines make huge amounts of torque for their size, or in other words they have high BMEP. For example BMEP for the S2000 is 190 psi, for the Viper ACR it's 165 psi, for the Corvette Z06 it's 166 psi, for the Ferrari Enzo it's 200 psi. The reason people say that Hondas don't have much torque is because they always compare them to much larger engines with similar power output.

[cream27426]

depends on the engine size f series is a bigger 2.0l so its going to make more torque simply from the stroke of the engine how ever a gsr or even type r both vtecs make the same ft lb as the f and 40+ more hp and the f20b dohc vtec murders any vtec including the new bigger k series. small 2.0 dohc vtec 200hp and 165 ft-lbs rated i have engine dynoed it and got 215hp and 178ft-lbs with a redline of 9500 stock good luck k series lol

[idontcare80]

The K series engines easily make well over 300 hp NA on pump gas. You should know your facts before you brag.

[cream27426]

and you can do the same thing with a b series or an f series or even and h you just have know how to build it besides i was just stating the fact that not all vtec engines had a low torque curve its all about the stroke

[lobolocoxx]

civic type rr mugen, 2.2 k20a 260bhp, or, civic type r mugen europe 2.0 k20a with 240bhp stock

[idontcare80]

Try using some punctuation man, its relly hard to understand your comment.

There is no such thing as a small 2.0 L or a large 2.0 L, 2.0 L IS the size of the engine. The F20B was impressive for its time but doesn't outperform the K-series. Stock the F20B is rated at 197 hp and 145 lb-ft. A stock K20 can make as much as 237 hp and 160 lb-ft. There have been some tuned K20s that produce in excess of 320 hp and 200 lb-ft.

[accord271]

Hondas rule!!!

[NAPALMJUNKY]

IT packs more air in to the cobustion chamber as it says, does it also pack more fuel in????

[eyezDatDude050]

if its port fuel injected(sprays fuel into the intake port b4 the cylinder) then its both if its direct fuel injection(sprays fuel directly into the cylinder) then its jus air

[C1up3r0s]

yes it does

[Batner112]

Honda Rulez

[doldei]

bmw's VANOS is way better...

[McGeeRF]

VANOS is good, VTEC is WAAAAAY more aggressive.

[doldei]

more moving parts means more friction, means more wearing, means more breacking...and the rest we know allready when we pay the bill

[Alex98098098]

I've never heard of someones vtec breaking before. It's a pretty strong system.

[McGeeRF]

Yeah, VTEC is not somthing that breaks.

Thats like saying a V6 with more moving parts will break before a I4.

The VTEC selinoid might go out, or your igniter might die.

Now if you put high lift aftermarket VTEC cams and stiffer springs, in your engine THAT could cause some extra wear.

That EXTRA wear would probbably put you at the same rate as a NORMAL non Honda engine. I have done oil analysis on multiple cars, so this is comming from my direct experience.

[McGeeRF]

..... Honda has perfected the art of engine building. To offset friction they use tighter tolerances, better metal alloys, a superior oiling system, superior cooling system. And by the way, since I have done a number of oil analysis on my Civic I have found that for top end wear, as well as bottom end bearing wear it is much less then that from my Nissan Maxima and Nissan Sentra BTW, the Civic raps out to 9,000 rpms with more moving parts as you put it. Honda is simply the top of the mountain.

[doldei]

we all know that hondas have high revs caracteristics, and civics can support a fair amount of tuning without losing durabillity.The vanos vs v-tec isnt for the comments in a v-tec video.Foolish of me. About the art of engine building and better alloys i beg to differ. I'm making studies myself too though...

[McGeeRF]

What do you beg to differ on the metal alloys? Honda made it a point in the 98 spec B18C-5 1.8L engine to make the internals stronger AND lighter using the same type of metal alloys they use in Formula 1. Honda's superior combustion chaimber design allows for as much as 12psi Jackson Racing Supercharger boost on a 11:0:1 compression.

They built the bottom end of that engine like a tank, capable of with standing as much as 1200hp. VANOS is good but VTEC is just better.

[doldei]

yes the engine in the integras...i know, but germany has the best metalcraft in the world...that compression is not far from an m3 ratio. And i still dont get why more than 300ps in a fwd...just doesnt work. the 3 series are one of the most well balanced car in the world and those hp ... i've seen what m3 turbos can do. I dont understand why the hate, since we all love cars...

[McGeeRF]

The M3 is one of my most favorite cars.

Hate has nothing to do with the fact that Honda Type R's VTEC technology is an aggressive powermaker lift and duration vs VANOS only duration smooth constant torque. Much above 260hp on a FF car is asking too much for the front wheels steering breaking and power, now if you put wider tires you could possibly get away with as much as 280hp or so.

This is a well known fact in FF Sport compact racing.

[doldei]

and i deeply respect mr. Honda and the brand itself, everybody knows that vanos is more progressive than agressive, i was just saying if i did it it would be more like vanos changing angle versus slidding rod v-tec...we're so much alike we should be friends...lololol

[McGeeRF]

Remember the VTEC technology Im talking about is out of my 98 Type R thats 11 years ago. Beyond that, i-VTEC bridges the gap between progressive and aggressive....... or you could just learn pedal control. Either way I like the aggressive surge in VTEC.

There are aftermarket cams that maintain better torque in the mid range and the VTEC point is seamless. With VTEC you get to pick your poison.

[emforty2]

did detroit big3 copy this technology ?

[fastfirebird1969]

No the big 3 did not copy it from Honda the variable value timing design found in modern DOHC engines. Is not a new idea, the first testing of VVT was conducted by GM, but Fiat and Italian car company devised the first functional VVT in the 70s. GM also had quad 4 engines in the 1980s that produced 600hp power from small displacement engines using VVT designs, but the highly tunes engines where only used in Indy cars.

[derekhess47]

VTEC was actually created by Nissan in 1971 and the technology sold to Honda (including the patents and licenses).

Honda did not change the original Nissan design until iVTEC was developed so it is kind of wrong to credit Honda with VTEC's creation.

[joyoflife42]

@derekhess47.Why Nissan didn't keep this technology??

[derekhess47]

It was a short-sighted management decision, it was Nissan's belief that no real economy gains could be had with the technology so it was fairly pointless to implement.

I know all this because I worked for Nissan (was actually the Datsun part of the company at the time) in the seventies.

[joyoflife42]

wow.thanks for the info

[McGeeRF]

Nissan of Japan SR16VE and SR20VE

both of these engines used Nissans version of VTEC. Nissan uses hydrolic valves and Honda uses mechanical valves. The manner to which Nissan and Honda employ this similar technology is very different. AND we have never seen either of these engines in America.

[vtec82]

you worked for datsun in the 70s. but your age states 23 yrs old? kinda weird.

btw, it shouldn't be undermined that honda is still tops when it comes to NA though.

nissan is more at home with turbos.

[derekhess47]

I am on my son's account :).

I certainly don't disagree with you, when I worked at Nissan a lot of the N/A units were modelled around what Honda and Toyota were doing at the time. It was not uncommon for brand new Hondas to be purchased and taken apart by the company, not to steal the designs but to keep up to date with what Honda were doing, if you get me. I expect this still goes on now.

[vtec82]

yeah. i heard from a friend a few years ago that its common for japanese carmakers to share each other's tehcnologies even though they are competing. initially, i wasn't sure whether it was true or not.

all i know that i get a lot of hate from mostly toyota fans compared to nissan fans.

[vtec82]

the funny thing is i like cars like the supra, mr2, silvia, old fairladys, rx-7s though im still a die-hard honda fan.

[p1n0yBalleR]

pretty much imports rule :D

[yelreda]

That is a lie

[89true1]

your life is a lie. your adopted. go fuck yourself.

[yelreda]

89true1, what I meant, is that whoever said that Nissan invented vtec and sold it to Honda is a lie. derekhess47 stated that above. You, on the other hand, should get a life and dont waste yours insulting people in youtube because no one cares. What you have no friends to go cus at?

[VitaminE6SS]

I knew about the intake side opening for a longer duration, but, I thought vtech also had to do with the exhaust side too.. Guess not.. So, what makes it different than the Toyota 1.8l with lift?

[Katsuya89]

ya it basically changes the cam profile at a certain rpm, but the problem with vtec engines are their virtually torque-less till they hit vtec, but that also helps save gas.

[delgas666]

well i think thats a good thing. for the people that want to save fuel the can do it by using low rpm. for the people that want high speed use high rpm (above 4500 i believe)

[dzfahmi]

What VTEC's mean???

[fredodp]

variable timing and electronic lift control

[Katsuya89]

it stands for variable valve timing and lift electronic control.

[2yungtone2]

fredodp is right...katsuya89 is kinda mix up

[Katsuya89]

Um acually im right. Go look it up yourself my friend. Even though Fredodp was pretty right on, its variable valve timing and lift, not electronic lift. But anyways same shit.

[bloodmind88]

you f______n japanes are very smarte!!!!

v-tec 4 life CRX THE BEST CAR

[pgo05]

i dont understand

[thibs101]

Wow i just learnd some thing today to bad i still dont know how to spell corectly

[Mercyfulfatejt]

vtec all day