Turbocharging 101 - Wastegate Basics

[Ellisinho9]

Good video mate, people dont use their heads anymore. I just removed my turbos to find out they are Nismo items. Im doing an inspection now.

Also very nice GT-R I got a R32 :)

[LookieLoudLou]

Good video man. Thanks alot

[sergsrt8]

can u still use an internal wastegate after a turbo swap in an evo?

[Jlizel]

thats why you never let shops touch your shit.

[RallyFanaticRich]

I appreciate Any Constructive feedback on this.

[Jlizel]

@RallyFanaticRich why would it matter? just more flow aka a bigger downpipe housing to release pressure faster anything past the wastegate has no effect whatsoever on spool thats why the turbo is divided by intake housing and exhaust housing it splits up the exhaust in 2 ways. 1st way the exhaust flow spools the turbo, 2nd way the other exhaust is expelled out and so on and so forth.

[RallyFanaticRich]

I have a question. I Agree with what you said completely Mr. Shop guy, but my question is, and bear in mind I Know I am fairly unknowledgable about Forced Induction (I am trying to learn) does it matter if the cut-outs that you did with a plasma and grinder are different from Turbo A to Turbo B? It looked like the cutouts were free hand cut. Would that affect any aspect of spool-up or any function if the shape and size of the cutouts were different? Thanks! I learned a bunch from this Vid.

[theskatelate]

rookie question what is psi stand for ?

[85typet]

@theskatelate dont feel too bad it stands for Pounds Per Square Inch.

[qwerty200999]

a valve only has to open 1/8 of its seat area, and that will give you maximum flow, i,e if you have an 8" valve and you open it 1" you will get full flow, open it to 2,3,4,5,6,7,8 inch and you wont get any more through it. another example is when you run a bath, you turn off the tap it's the last full turn that you notice the biggest differance.

[olov244]

it's like they didn't even test it out. i do some ghetto stuff but at least i test it to make sure it functions

[DVcustomZ]

I would hve just bought some new divided 3" down pipes and threw that crap away.

[kokis3]

idiot ffs are you supposed to be mechanic engineer or what??? the valve dont open more than 15 % else it will get the boost pressure too low..it cant open 100 % for some reason moron.. car manufacters arent stupid like you are... idiot car tuner / mechanic...

[NoLimitMotorsport]

@kokis3 right, we're the idiot tuner????? Do you have any idea how wastegates and turbos even work. the flapper doesnt even START OPENING until it reaches wastegate base pressure, so it doesnt matter if the flapper goes 90% or 10% or whatever, it stays shut. Once the engine makes wastegate spring pressure, then it opens up, whatever it needs, to bleed excess boost. So in this case, the welded flanges ontop of the factory O2 housing which caused it to barely open up and OVER BOOST. We fixed it.

[kokis3]

@NoLimitMotorsport yea sure... well im tuning turbocharged cars for many years.. try it for yourself and if you manage the wastegate valve to open that much then i ll go suicide...you can see it opening on 75 % on overboost instantaneously and then it goes back to much lower levels depends on the psi you have programmed it to.. and the more pressure you need the less the valve opens.. you can try watching the wastegate valve how exactly it works when the car is on a dyno...not on workbench

[MyStIcTrE3]

@NoLimitMotorsport

That's correct

[TLaitharex]

@kokis3 Someone can't understand simple mechanics...

[Jlizel]

@kokis3 are you retarded? hahaha so you have 40psi of boost pressure and your running 7psi on your boost controller how is your wastegate going to expell 33psi within a split second? 100% wastegate actuator open. stop being a jackass youtube racer

[bmfbbmfb]

@kokis3

wow your stupid

[preludemaster]

hope u removed the o2 sensor before using a plasma cuter on the hosing

[carswesty]

my car when i floor it from idle it's flat on power but as soon as i get to just over 3000rpm it takes off like a bullet!!! do u have any idea what could be wrong with it please?

[NoLimitMotorsport]

@carswesty If its a turbo car, its probably LAG.....

[carswesty]

@NoLimitMotorsport yeah this is lag to a point but i know there is a problem with the turbo but i don't know what the problem could be....could the wastegate be stuck open,the acctuater is workin fine but can the wastegate cap fail on a turbo!!!thanks for reply!!!

[Suprakidd1]

@NoLimitMotorsport HAHAHAHAHA!!!!!!! OMG

[rocker4u123]

@carswesty turbo's take awhile before they build up enough pressure to give your car a boost.

[carswesty]

@rocker4u123 i know,but there is somethin wrong with it but i just can't put my finger on it! also been told it could be a transmisson problem as well as it is a automatic,they say there could not be enough hydrolic pressure until the motor gets to 3000rpm,but like turbo's i don't know enough about them!thanks anyways!

[Clemmmmo]

@carswesty yeh your car isnt producing enough exhaust gases to spin the turbo but when u get to 3000rpm, thats more than enough to make smaller turbos spool to max psi, therefore takin off like a bullet. my r33 gtst has 11psi boost at 3000rpm.

[carswesty]

@Clemmmmo thanks for reply,so you think it's time to replace turbo then? i had a fellin it was a turbo problem but i did won't to replace it to find it wasn't!!! by the way the car has done 100,000 miles now & i think thats a contributing factor as-well!!!thanks again apprecite this!

[Clemmmmo]

@carswesty nah there is nothing wrong with your car, thats ment to happen. turbos are powered by your exhaust gasses coming from your engine, thats what spins the wheel to push air into your engine. and cars cannot produce enough exhaust gasses below 2000 rpm to spin the turbos fast enough to create boost.

the bigger the turbo the more exhaust gasses you need to power it. so some turbos will spool at 4000-5000rpm. so dont worry, your car is fine, what your experiencing is normal.

[carswesty]

@Clemmmmo ahh but i hav 2 of the same car,,,,1 is fine throught the rev range with no lag & the 1 i'm havin problems with, i'm gettin the symptoms i'm askin about!!!

[B3NALATOR]

@carswesty thats normal...

[swat3067769]

do i do this for a ebay turbo>?

and every turbo>?

[phansone1]

Yo i need to know where to hook up the pressure hose for the waste gate to open, because for some reason everytime my turbo spools up it lags after 6000 rpms and then spits oil from somewhere and i cant find where.... Plz I need help this is the last thing till i complete this engine overhaul.... I have an eclipse GS-T thanks...

[arocast2003]

That´s why i prefer external wastegates... OEM wastegate actuators doesn´t work well with raising boost....Good vid man....

[nissanaltimaka24de]

This is a perfect example of why you should work on your own cars, you know what you got, and what you did, and can do it right the first time :)

[NASTYTHEBOY]

why do you use cast iron!?

its ugly :p

i like my steel down pipe better :D

[Aerosmith145]

You say there's "no travel" and it's "completely blocked". I see the arm moving at LEAST .375" as you move it, with the "bad" 02 housing on. Most vehicles don't open nearly that much from the factory! That's more than sufficient! Look at the factory setup on a Ford-style 5-bolt factory internal wastegate. It only moves .375" before hitting a wall, maybe even less. Furthermore, the puck only cracks open as much as it needs to maintain a set boost level. It was prob fuel/knock that did it. Geez.

[NoLimitMotorsport]

@Aerosmith145 Thats where your wrong. These gates were suppose to be 14psi, and before doing the modification, boost was 30+psi. There was no relief whatsoever on the exhaust going thru the turbo and boost spiked. Sure enough, once we modified the flanges, boost went right to 14psi and we were able to raise it up using a controller.

[osbjmg]

@Aerosmith145 My stock STi downpipe looks similar. I don't know much travel the flapper has, but it would seem a bit restrictive to have the air slam into that surface and have to redirect down the pipe.

The point of this video is to maybe show that the turbo isn't matched to the downpipe maybe? I'm not really sure.

[jgkov49]

they destroyed a great import :(((

[nickleary123]

who the fuck would even do that?

[NoLimitMotorsport]

Acosta Motorports in NJ......

[nickleary123]

wow.

i live in nc and there are some dumb as people down here.

[V0DEAN]

lmao

[Lerssinen]

I have just the same turbo on nissan D21 2.3 Diesel ;)

[flipya101]

when u customise waste gate u also need 2 customise your dump pipe

[tdog4500]

wow i hope u didnt have to pay for there mistake!! lol i bet the guy who did that is havn fun finding a new job! and embarassed!! lol

[preludefan]

what a fuck up, anyone who does something like that should not even be alowed to work n weed wackers!

[93supra2jz]

damn, how dumb can people get.

[NoLimitMotorsport]

yes, well it caused the guy to blow his motor, and then blow both turbos, so yes, it was very expensive for him. Unfortunately, the customer didnt persue legal action against MVA.

[NAzT006]

wouldnt whoever did that know to just run an external gate? the guy must have been drunk when he was working on the car lol

[IAmKyleDoty]

@NoLimitMotorsport Nice work NoLimit, aerosmith is a douchebag and is obviously taking auto advise from his mom. 2 things, 1. I think Im gonna trust the guy with a friggen skyline in his garage and a plasma cutter filleting turbos, 2, This isnt exactly some T-bird or probe 4 banger type of tunning were talking about here. Geez ;)

[tyndago]

Nice. I bet the thing was "super fast" right before it blew up.

I call them intergral wastegates,as they are part of the exhaust housing. Intergral with them.

What did that outlet tube come from ? Looks like a Nissan piece.

[NoLimitMotorsport]

They are the factory R33 outlets, with a flange welded directly to it. Good old MVA in NJ did this master peice and wasted about $15,000 in repairs for the guy.

[alexthebikeman]

Was the company that did the modifiaction not at fault? damnn thats an expensive mess!

[MPC666]

well... this set up isnt really that bad, simple solution... install an external wastegate, i mean honestly, you dont need the internal wastegate, it would be the same as weilding it back up, but then again, i supposed it depends on what the rest of the setup on the car is like eg is the flange set up so you can put an external on

[DOHCtorMiguel]

Wow thats crazy. I would be pissed if that happened to me. Good video

[s14sr]

Some thing doesn't sound right here. A shop fucks up your car and you won't reveal who it is? 1 star.

[Nztimr33]

hahah if these idiots did realise that when they put it on they should not b working on cars fullstop!.!.!

[R31doriboy]

dont seem to be rude but thats wak .. ide never go to that shop again .

ide also be ask for my money back .

[superco0l88]

props for doin a good cut

[nate379]

Looks in that vid that the waste gate was still opening. It doesn't need to open much to bleed off drive pressure.

Either way, if the turbo was only good to 35psi and it was hitting 50psi... that should have be an indicator that something wasn't right!

[Datsrboi]

It does not need much to bleed pressure yes. But the more the engine flows the more it needs to open. Take a BOV as an example. You wouldnt want to put a tiny bov meant to flow a 1.5 liter 4 banger on a 6 liter V8 turbo, I bet you will be having a hard time venting it. Same with wastegates. You want it to vent asap not just a bit over what it needs to.

[aotsukisho]

good video, although you should've gotten an assistant to help you with holding the components. :)

[danger2615]

is a waste gate the same thing as a dump valve???

[FranViento]

no, the wastegate releases unwanted extra air from the turbo, if it didn't had a waste gate you wouldn't have control over the amount of PSI you want the turbo to deliver. Not good because pressure would just keep rising and rising as long as you keep revving up.

A dump valve or blowoff valve, releases air pressure in the intake when you let go of the gas so that the same pressure doesnt goo back at the turbo and stop the turbo compressor blades from spinning.

There you go!

[droy333]

mmm kept building up more pressure till something went boom.

Hope the guy got it fixed for free.

[NoLimitMotorsport]

Free????? HA, unfortunately, no, this customer ended up having a 12,000$ bill wih the shop who caused the motor to blow. If he hadnt come to us, he would have blow the built motor as well.

[tpvalley]

My wastegate is siezed so I overboost, a moved the wastegate arm just about 5 degrees, it stuck there and I got zero boost!

So is it only really tuned cars that need so much opening?

I was getting 23psi!!

15 is standard!

This is why I'm down on power, the high temp negates any extra boost/charge density doesn't it.

Very informative video.

U need to ask others that have been to the "shop", it may have been a one off mistake?

Did he get his money back? hope so.

I would have given refund!

[SuperNerDoS]

haha damn that sucks.. but a good video! But after plasmacutting, are you still sure that the integrity of the exhaust manifold is strong enough? Why didn't you order a new one, the right one? this way you don't have to cut something and the integrity stays the same..

what do you think?

[nicmancini]

scuse me,boost = wastegate open or boost = wastegate closed????

[NoLimitMotorsport]

In order to build boost, the wastegate needs to be closed. Once the turbo has spooled, in order to keep the boost at a constant level, the wastegate opens up and bleeds off the air. With this car, overboosting led to the engine blowing and turbo's.

[venvol]

very good video :)

[reckless54]

excuse me but the reason why it had that bit in there stoping the internal wastegate to open is for an EXTERNAL wastegate setup...correct?

[NoLimitMotorsport]

No, this car was using internal wastegate actuators as shown in the video.

[droy333]

I think the guy meant the shop thought it was a wastegate setup.

But they were just stupid.

[toyotanos]

Exhaust CAN get through the wastegate valve in that setup, but not enough for effective boost control. Good job on the cutting! Good fix.