VNT turbocharger cutaway animation

[judgegixxer]

I used to have a 90' Daytona with a VNT 2.2litre. That little car hauled ass as long as you could hang on to the torque steer.

[sSTRE3TDR3EMZz94]

i dont get it..

[sSTRE3TDR3EMZz94]

i dont get it..

[lmogden1]

great video

[livdinion]

nobody noticed that the blades go the wrong way?:)

[Gussechan]

@livdinion that's because they actually do rotate the right way. it's the exhaust side, remember?

[michalplacek]

So this system its not at GT1749VB ? Because I´ve got it at my 1.9 tdi pd 96 kw and actually I heard that it has variably geometry or wtf... :-)

[Suleeto]

VGT stands for "Variable Gate Turbo", and VNT stands for "Variable Nozzle Turbo", a Honeywell (Garrett) design that uses variable angle adjustment of the vanes. VGT's don't all work the same, and a VNT is a type of VGT.

[Veikra]

@Suleeto VGT = Variable Geometry Turbo.

[beluga420]

I knew about VGT, but whats the difference beetween VGT and VNT?

[cro0zer]

This configuration did NOT work well for Mack Trucks..I work in a parts dept. and have sold a shit load of 3 grand "VGT" turbos.Seams like to many working parts,150 to 200 thousand rpm,s and miles on a 728 cubic inch diesel motor do not hold up with this design.Oh btw they call it VNT tech we call it VGT(variable geometry turbocharging)

[jillybooty]

@LoveyyLaurelaj234 good

[assariassari]

by which program u did this ?!!

[AltronZero]

@assariassari Id say Autodesk XSI, else would be Maya or 3D Studio Max.

[RSX250]

does it act as an exhaust brake when the vanes close?

[renizer]

isn't the standard position 'normally closed', so that the vanes are closed with the actuator's spring decompressed? the small port on the top of the actuator is normally the pressure port, so in your animation that would open the vanes once it sees boost on the pressure port.

something's wrong here imho.. anyone on this?

[clifborder4fm]

there a reason VNT's are heavily used on tdi's?

[Adrianrff]

Isn't the animation running backwards? Makes no sense to me

[NickBlackDIN]

@Adrianrff that's what I was thinking too, unless this is the exhaust..

[drumstick9000]

my name is garrett

[Shaker1978]

What does VNT mean? I know this as VTG...

[r2kool4u]

@Shaker1978 Variable Nozzle Turbo

[Shaker1978]

@r2kool4u Thanks, r2kool4u and JackMacyntire ;)

Is that the same as VTG (Variable Turbine Geometry) ?

[parkaveultra93]

@Shaker1978 VTG, VNT, VGT are all simply in basis, variable geometry turbos, the different acronyms are simply different manufacturers putting their own spin on the same product, hope that helps.

[Shaker1978]

@parkaveultra93 Ah, thank you :)

[JackMacyntire]

@Shaker1978 Variable Nozzle Turbine. 

[pendejadafcc]

i dont get it......

[candle2k]

Amazing design. Quick spool up, but lots of top end too. Kinda like VVT but on a turbo

[iamsmilie]

saab (the best car company in the worl) invented that actuator. yes its an actuator, for the low vocabulary people acuator means "its starts the action" ...so what hapens is this actuator helps the engine at low rpm in order to reach higher rpms faster and the max output of turbo.. so u get max output around 2k rpm intead of waiting till 3k rpm causing turbo lag..

[JPARKERZ28]

@iamsmilie "low vocabulary people" and then you spell happens as "hapens" hahahahahahahahahahahahahahaha­hahaha... hahahahahahahahahahahahahaha..­.hahahahahahahahahaha... okay i'm done hahahahahahahaha

[ChristewieTV]

Is that how variable geometry turbos work?

[mikelikeltj2]

i'm slightly stoopid so i need someone to explain. when the vanes are more "open" and spring is expanded, is that when the exhaust gas pressure is higher (higher rpm) or do i have that backasswards?

[sqhschief]

I have a VNT on my Jetta TDI.

[xxBlackpspxx]

would be good for some pimped up 1200hp supra lol no more boost lag

[gearheadd318]

this explains it better then the wiki article.

[COD5252]

the wheel is rotating in the wrong direction

[MrLowAltitude]

@COD5252 No it isn't! this is the exhaust turbine, not the compressor!

[sjomada]

@COD5252 actually this is correct... this is the exhaust side so the gas is flowing from the snail (housing) to the turbine

[golem72002]

@COD5252 the fins are also backwards then lol

[UberWagen]

Is vacuum moving the diapragm?

[sqhschief]

@UberWagen No. Boost.

[catfish77x]

I owned two cars with the same 2.2L turbo engine (an 88 Dodge Shadow and a 90 Chrysler VNT w/intercooler). The intercooler boosted power and torque and the VNT reduced almost any trace of lag). VNTs rock!

[nowheelspin]

Porsche has a better system

[drauglintuor]

Good for Porsche..

[electricshockproof]

@drauglintuor What makes you think Porche did this?

[bait28]

@drauglintuor porsche suck...

[negativeindustrial]

you are describing sequential turbocharging not twin turbo charging.

Twin turbocharging uses two , let's call them medium sized Turbos, to do the same work with less lag as one larger turbo. Work in this case is described as moving CFMs of air and boost pressure.

[B787YV]

<----------- Honeywell Garrett turbo quality controller greeting from Italy

Ciao

[Timberpants]

I have added a film to video responses which does a good job of explaining/ demonstrating how twin sequential turbos works on a V6.

[MassiveLemon]

That's sequential turbos

[sheik480]

Just two different solutions to the same problem. Gotta love innovation, huh?

[mmarmash]

Clever way to decrease exhaust pressure in the turbine, by changing its angle of flow thus not exceeding allowable boost levels in intake manifold, BUT the question remains , that pressure decrease is not just going to disappear , this method reverses pressure backwards through the headers causing back pressure through the cylinders thus retarding the piston motion and working against the whole system , A WASTE GATE is still needed because it releases the excess exhaust pressure outide or after.

[momurda23]

no shit that things not a wastegate you can clearly see what substitutes the wastegate

[KabeTKD]

zackworden ok yes u are right and everything u say is true but small prob it acts as a built in wastgate all newer turbos have them well ok not all but the good new turbos have them and it is a wastgate call it an acuator or wat ever it does the exact same thing trust an old man

[Ag19811]

sweet i like that little bitch!!! ;)

[zackworden]

.. that piston-looking thing yall are calling a wastegate IS NOT A WASTEGATE! Its a spring and diaphram actuator.what it does is apply pressure on the "vanes" when they are closed it acts like a small turbo allowing only a small amount of lag. when rpm increases the vanes open up and act like a big turbo allowing you to rev higher. and when you slow down they close back up again...alowing quick response time...Belive it or not this turbo does not use a wastegate...it doesnt need it.

[richardrollings]

at least someone knows somthing lol.

let them think its a wastgate mate.. dont let it get u mad lol. i jus laugh to my self

[rebeltshead]

why doesn't it need a wastegate?

Can't it still overboost...

[monandjay]

No, because the vanes can direct the flow of exhaust in such a way that when the maximum shaft speed is reached, the exhaust is angled to keep it at that speed, and no faster.

[mysticalmagick]

@zackworden thank you for clearing that up, i was wondering what the piston was and what the vanes did.

[CypherX5]

Thats because all these idiots don't know what a wastegate is or WHAT IT ACTUALLY DOES!

You don't really need one on a diesel engine.

[stupidplants]

@zackworden

so its an internal wastegate.....

[pullzarNL]

@zackworden so infact u are saying. it's almost the same as an bi-turbo??

[fenix144]

@zackworden wow couldn't explain it better. X2

[pyro6674]

@zackworden

I am so glad that you posted this comment.

You saved me a bunch of typing.

[LookieLoudLou]

@zackworden I noticed that - thats bad ass!

[goalieboy1000]

@zackworden The turbo it self is like a waste gate changes exhaut preassure and turn it into horsepower

[zackworden]

VNT stand for Variable Nozzel Turbocharger and they only came on '89 Chrysler Shelby CSX ,'90 Le Baron GTC,'90 Shadow ES,and '90 Daytona...THis is Not your every day turbo.

[richardrollings]

there standard on ALL VAG deisel range....

[pauljs75]

Just wondering, what are the advantages to this in comparison to having a vacuum gate switch between twin turbos of different sizing? Or perhaps a dual scroll turbo which does something similar in a single unit? A lot of recent cars seem to use those methods to get over turbo lag. The variable design is neat, but I'd suspect you'd have to give up some efficiency/output at one end of its range.

[blixdevil]

The advantages of VNT over the twin you describe would be the obvious - cost and packaging. The turbo lag is much lower on my VNT Lebaron but it is still there. The disadvantage of VNT for gasoline is that the little vanes have to be made of pretty exotic material to not get stuck from carbon build up and thermal expansion (they still use them on diesels but I think diesels actually have a lower exhaust temp)

[RentedBlackbird]

noo... diesel's exhaust temp is a lot higher then gasoline engines. ever notice when you see a semi driving down a street, you can see the heat of the exhaust when it leaves the exhaust pipe's and the headers on diesel's can hit 1200-1600 degrees... i learned that the hard way when i tried painting the headers on my trucks engine. the paint burnt off :(

[sheik480]

Are you sure? I always heard diesels had lower exhaust temperature, but now I'm not sure...

[sweetbounty]

of course that u were right DIESELS GOT LOWER exhaust temperatures - this silly RentedBlackbird drive a truck (lol) so he compared this to gasoline truck I guess (lol) the only what gives u a higher temperature in turbocharged diesels is a turbine which is taking blast of exhaust fumes - that's all

but temperature of exaust fumes in diesel engine is pretty lower

I am not sure but : diesels its about 500-600 C'

benzin 700-800 C'

[chabbalato]

you're right. Diesel engines have a higher thermal efficiency, thus less wasted heat.

[bigdiffas]

When u tune up your diesel the egt reaches up to 950C. VNT works fine on petron engine when keeping the egt below 900c

[sweetbounty]

when u tune a petrol engine temp reaches up to 1100C, the turbocharger glows then like a liquid steel

[bigdiffas]

Yea but with vnt-technology u can have very usable rev-range to use. You don't need that much of boost on petrol so even that reduces egt on petrol. Now i'm talkin about mild tuning. :)

[sweetbounty]

true.. its because different ways of burning fuel mixture and different character of increasing power and tourqe but still egt in petrol is higher (when u compare stock or mild tuning)

[impalaman1962]

Look at a L7042 GSI Waukesha engine at a load at night, the egt's can be around 1200 degrees for 24 hours a day.

[Frankie5StarHighway]

The Garrett Huge turbo-volume!

[TRizmylife]

LOL at first i thought tht was a piston...and SUPERCHARGERS SUCK NUTZ, TURBOCHARGERS RULE

[MoPar7055]

A turbocharger is a turbine powered supercharger you stupid cunt

[bjthejetplane22]

hey fag... wat do superchargers do that turbochargers dont? answer: rob the engine of power its making for the engine to run itself which in turn is halfway defeating the purpose of havin one...dont get me wrong they still help but i think its just kinda dumb wen you could put a turbo on

[MoPar7055]

There is going to be massive back pressure on turbocharged cars. Usually 2 - 3 times what the intake pressure is. It is impossible to have more intake pressure than exhaust pressure on a turbocharged engine. The backpressure is certainly robbing power. As a result you can't run cams that have as much duration and overlap especially in the high rpms because you run into problems with reversion. Turbos and supers both have their advantages/disadvantages.

[almues]

thanks to rossjsy1 for your explanation... I study in automotive college, so I really interested in this topic...

[almues]

this is video about how wastegate works!

[rossjsy1]

no, its not. a wastegate vents pressue. this varies the veins so you have the fast spool up of a smaller turbo with the boost of a large one

[18paddy88]

as far as i no a super charger is better, it uses about 30 horsepower to work but it gives so much more,

also a turbcharger wont effect the engine power properly till u are going a decet speed cos it needs exhaust gs but a super charger takes effect from the beggining

[jkulhanek]

Modern Turbochargers are affected by their ancestor's laggy reputation. Turbos have almost none or very little lag these days. Turbochargers use the normally wasted heat/pressure which increases fuel efficiency.

[MoPar7055]

You really don't know what you're talking about, when you have a tiny turbo with a small a/r ratio ofcourse there won't be lag. There is still plenty of lag in turbochargers depending on what factors come into play. Saying turbos don't have lag these days is fing retarded and thinking that all turbos are going to be the same is even more retarded.

[lotusiotus]

what?

[MoPar7055]

What part didn't you understand?

[lotusiotus]

how the waste gate thing or whaterver it is works. Dose the spring pull or push and what pushes the piston

[MoPar7055]

Thats not a wastegate, VNT turbos don't have wastegates because it would be redundant. If you want to know how an internal wastegate works I've got some pictures of mine when I did a turboswap.

[slyputz]

Spring PUSHES the control rod to the left. Vacuum PULLS the control rod right.

[Krisspychiken]

its a matter of limitations, superchargers can only go at speeds relative to the engine revs which has great response while limiting max output, this is preferred in drag races where max hp needs to be made quick... turbos have to spool and usually take long to produce pressure

[hobbs310]

the only plus to a supercharger is that you have great throttle resposnce with it but you have almost zero effect in top end, if you get a nice turbo it has about .5 lag to it and you barely even notice

[deanoobaby]

u are correct but but this vid is about turbo works well mainly waste gate. both turbo and super charger have pro s and cons

[bikercc]

more like 50 horse power but then again it adds like 100 horsepower

[superpushy]

eney way that was pritty cool...but how dose a supercharger work ....is a turbo better than a superchargerbecause i see them on speed week

[getlow1985]

yes a turbo is better than a supercharger a supercharger uses the engines power witch over time weirs the engine of its power and a turbocharger rcycles the air in the engine witch does not use the engines power at all.

[cornelpamfil]

yep, but you have turbo lag effect

[getlow1985]

yea

[sheik480]

That depends. Turbo's can make more 'extra' power, but usually have a little bit of lag. Small turbos spool quickly (less rotating mass), but can't make as much boost at higher speeds. Large turbo's make a lot of boost at high speed, but have a lot of lag and make almost no low end boost. That's where VGT's come in: it allows a large turbo to spool up quickly (minimal lag), but still create a large amount of boost at high speed.

[italviet]

It's spinning the right way those flaps are called Variable Blades a different way of controlling exhaust gas flow to the turbine wheel, other than the Wastgate and Twin Scroll.

Though this set up is used on diesel engines due to the low engine rpm.

[Whack78]

That's pretty cool, I assume the diaphragm runs off vacuum to slow the turbo at idle. God help you if one of those little flaps comes loose though :P

[DBFIU]

Agouti, that is the turbine side of the turbocharger. It is spinning the right way.

[Agouti]

Turbo is spinning the wrong way.

Lol fail.

[Turbo617]

No, it isn't.

[bigplayer2382]

no its deffintally spinning the right way..