How Turbocharger Wastegates Work - Internal vs External PLUS New Wastegates from Garrett!

Today Mike looks at turbocharger wastegates and how they are used in a turbocharged vehicle application to control boost pressure. We talk about the differences between internal and external wastegates, how they work, installation considerations and we take a look at the internal components. We also check out the new line of wastegates from Garrett Motion who supplied us with a cool cutaway example of their new GVW - Garrett Vent Wastegate for our demonstration!
0:00 - What is a wastegate?
1:04 - Internal wastegates
5:37 - External wastegates
7:00 - Garrett Vent Wastegates
7:52 - CFD
8:51 - Heat management
12:25 - Advanced materials
15:13 - Adjusting boost pressure
16:31 - Product testing
17:35 - Hysteresis
18:55 - GVW features
19:47 - Mounting position
LINKS:
Learn more about the Garrett Motion Vent Wastegates: www.garrettmotion.com/racing-...
READ MORE on MotoIQ.com! www.motoiq.com/
FOLLOW US on Instagram: / motoiq
LIKE US on Facebook: / motoiq

[@slutz4]

I love this guy. A true automotive legend. His happiness is contagious

[@paulfox4636]

He's always happy. Think it might be 420 related.

[@Jersus856]

Love listening to Mike about anything.

[@billharriss4463]

Yep, He always looks like hes about to bust out laughing!

[@nobodynoone2500]

Without a doubt, one of the best.

[@hasty9988]

Mike is why I subscribed, my man is a national treasure!

[@quesadillagames851]

i would hire him to read bedtime stories ngl

[@patinaautosalon]

And hes always smiling

[@comment_deleted]

I normally don’t watch commercials. But I’ve never seen one as engaging as this one. Wasn’t even in the market for a wastegate but now I want a Garrett wastegate

[@markkrumme7424]

Same.

[@westcoastwoodsman2289]

This guy has a crazy ability to explain things in a way that even a blockhead like me can understand. He is awesome! I wish I knew half of what he has probably forgotten about making power.

[@oldv1288]

5:37

[@randyortiz2099]

The co-staring fly was a for sure hit! Bring him back for the next vid please lol

[@firdausomar2356]

the way uncle explains made me continue to listen. wish that teachers can learn from a simple smile from uncle. thank you!

[@shoujiki999]

Absolutely love listening to Mike. He could talk about anything technical and it's a pleasure to take in. He has a gift of explaining things simply. You should definitely have him do an entire series of automotive explainers. Top stuff!

[@pops9190]

OK, hands-down you win the grand prize for the best description about this turbos and waste gates. Nice job

[@derrickallen2054]

Saying I'm glad I found this channel would be a huge understatement. 💪🏻

[@mextamacion1097]

I own 137hp hyundai with 30mpg. But i still watched it!

[@CITYBORNDESERTBRED]

The joy he has for this stuff is infectious 🙏🏾

[@kuhak5787]

I love this guy how he share his love to cars and hangs out everything he know and how happy he is when talk

[@stevesloan6775]

You're so easy to listen too! Love your straight talk style. Thanks for sharing quality information.

[@MrTDM09]

As usual, professor Mike Smiles at it again blessing us on knowledge🤙🏾🤙🏾🤙🏾

[@xen5h4d0w]

This guy motivated me to go get my apprenticeship

[@watchingwatches2785]

This guy has the most Eternal lasting smirk I’ve ever seen

[@exothermal.sprocket]

Love it when people who have a ton of knowledge are very unassuming. Keep it up! And the self deprecating humor is quite funny.

[@204norway]

You're metallurgy knowledge is on another level!

[@jayski8987]

I’m drooling over that old school Corolla

[@MusangLaut2]

hey ive seen this one before

[@motoiq]

We accidentally published it before all the edits were done! It's slightly different now :)

[@slfrules1]

Those valve seats are a great idea!! Integrated water jacket and heat shield, that raised angle on the big boys. These wastegates are seriously well thought out. I bet those stems could use some WPC

[@marcomoon6062]

I dont know if i can watch this seriously. Any second he's just going too bust out laughing and thats all im waiting for

[@matthewpham]

These are the marketing videos I love watching, especially when it's from Mike. In-depth technical content from someone who actually knows what they're talking about and who isn't reciting marketing buzzwords from the catalogue. Keep this going!

[@DarkInstinct05]

It's the guy on my Haynes Impreza manual pulling a new SG Fozzy XT apart.. and to hear the plethora more information he has in his mind gives me all the more confidence in the manual I bought. Thanks again Mike!

[@hyper8545]

Garrett always doing great things 👍🤙

[@friguy4444]

I subbed to this channel for two reasons. One this channel has great info and clears up lots of questions. Two This man is AWESOME! He always looks like he's smiling! Maybe he IS smiling all the time. He looks like there's a joke that he knows and it's funny and he might share it with you if you'll just join in. LOL. I love folks like that. Mind you they are often frustrated that others think they aren't being serious about something or anything because they always have that great expression of a smile on.

[@DDescalchuk57]

My favourite forced induction talk is when people think that a BOV is the same thing as a waste gate lol. Good knowledge coming from this guy

[@shiloh5199]

Mike is great...loved watching his Subaru related videos, I learned a lot listening to him.

[@dub537h5]

I could listen to Mike all day long, what a fantastic presenter

[@SuperlapS15]

As always, fantastic content from Mike and the MotoIQ team. Informative, interesting, and entertaining! Thank you for all your effort, and I look forward to the next video/article.

[@motoiq]

Glad you enjoyed it!

[@RA-uj3nm]

Natural teacher. Excellent understandable info. Thanks 👍👍

[@f0nd004u]

Mike you are so smart. Thank you for this technical information.

[@laurencismyname]

Wow, this is so good, thank you! Im amazed that the diaphram can be cooled, that is so brilliant! and that there are other metals in between to deflect heat - really clever stuff! thanks again!

[@stevesloan6775]

New Subscriber...Long time watcher. : ) You're definitely getting better with your delivery....Looking back at your first few videos.

[@yuno3364]

i say this all the time 😂 he looks like someone off camera is trying to get him to laugh. love the videos keep it up!

[@jesusberlanga4346]

I feel like I really learn from these videos thanks

[@alltheboost5363]

I was a super broke college kid when I turbocharge my 71 Datsun. I traded my time for a broken tile 38 mm two bolt wastegate that was cracked and then took the guts out of it and put it a no-name housing and it's been in there for almost 15 years. Diaphragm still good still makes the same amount of power and no added lag.

[@missestherteen9651]

Cool who made your lip?

[@RandomlnternetGuy]

Ive already seen this and i'll watch it again!

[@nobodynoone2500]

Great vid. Thanks for all you do.

[@tireroastersgarage]

I love this guy. Such a cool dude.

[@chensueher1393]

Very Informative, love it

[@mariapantuosco2267]

This dude is the GOAT

[@bend185ont]

This one was great!

[@krispyliving7993]

Very educational

[@turbo_brian]

Mike would make my day if he said "I like big valves and I cannot lie"

[@LINOBOYLIVE]

Mike has a resting happy face. Cool guy!

[@TheTravellingHobo]

That Garret goes crazy

[@jasonraynar6955]

Subscribing for the co-starring fly... And the awesome information... Thank you

[@edwinthomas618]

I could watch and hear his kind face and voice all day

[@Hectorszenshopedc]

my Favorite sensible Guy

[@UngluckInc]

Mike is a fukn national treasure.

[@subilove668]

I want to interview the fly. I wish I could be that fly on the wall!

[@doebuck9708]

Lol. Very true the seats does really matter. Learn it while on the dyno......Great vid.

[@steveguest8028]

Great easy to understand video, this guy always looks like he is about to burst out laughing 😂

[@Twobarpsi]

I got great boost control with a 50mm HKS external wastegate.

[@Veluisep]

It seems like the people behind the camera (if any, are making him almost laugh and he has this smile like he’s about to crack 🤣)

[@j.m.5995]

My FC came with a Hitachi turbo that had a relatively small wastegate and once I out the aftermarket exhaust I was getting the boost creep

[@studly1138]

He's cool non stop entertainment!

[@JC-vc7tf]

Nice!

[@zslemp]

I ported the internal waste gate and moved the actuator farther out on the arm for more leverage and was able to eliminate boost creep and hold a higher boost with the stock turbo I was using

[@motoiq]

That works!

[@blakelip3]

How much more boost were u able to hold??

[@zslemp]

@@blakelip3 I was making about 42-45psi on a BW hx35. It was way out of it's range and very hot and spicy and I ended up breaking multiple shafts and sending compressor wheels into the housing. I would not recommend going that route for any kind of reliability. I was poor and wanted to go fast at the time.

[@monikhushalpuri]

Have you heard of the holset hx35g? Apparently found on buses and stuff like that, same thing as an hx35 but with a watercooled cartridge

[@A.R.C.77]

Awesome 😁🤘

[@derangedazrael2615]

I couldn't get 5 seconds into the video before he beat me at the "Hold your Laugh in" Game 🤣

[@user-qd8rc4qg5k]

Great content! Tell about Nissan P10!))

[@motoiq]

It's Martin's race car, mild turbo

[@digitalbilly]

I learn so much from asian guy smiley!!!!

[@rogerbrooks1048]

I want that SR5 Sport Coupe behind you in the vid. It looks to be in your way. Let me know where to pick it up. 😁. I had one at 16 yo.

[@grippgoat]

Speaking of boost creep, that looks a lot like the exhaust housing I had to port on my 05 STI when I got a full turbo-back exhaust.

[@motoiq]

It is an 05 STI turbo

[@josemendez-wu1nj]

Like and need more

[@GarageSupra]

I'd like to see this on Turbosmart gates next also dont forget about screamer pipes

[@motoiq]

They are very good wastegates

[@bengepp9314]

I cant think of an actual comment that does Mike or MotoIQ justice , lets try , its not rocket science once explained perfectly , a must read Corky Bell's 'Maximum Boost'

[@SR-fx5sm]

Another cool thing is..Garrett paid me alot of money for this. :)

[@motoiq]

We are cheap.

[@thaitanium9025]

I do want to see more of Mike doing videos with his new stupid co-star fly....hahahaha had me rollin there.

[@hrdu]

Happy man

[@georgemanias5177]

I would love Mike to build my EJ

[@madxmaxxine6552]

Here for the fly

[@R.B_B]

Another nice video! But why not include the new but avaliable and good electronics wastegates?

[@motoiq]

We will be devoting a whole video to those.

[@TheEvilTwinCG2]

I have a question and I need your specialty opinion. The wastegate had started pulsating after I’ve turn up the boost to from 4psi to 10psi. A 4port boost controller was install via haltech 2500elite ecu. On 3rd gear, boost is set at 5psi and after 4k rpm it’s set at 10psi. But since the wastegate pulsating started, boost will come alot later in 3rd gear and I’ll have fuel cutoff around 6500rpm. Check engine light will pop up showing a code for INJECTORS 90% CYCLE DUTY. It has a 450lph walbro fuel pump and 1000cc Bosch injectors.. also on e85.

[@motoiq]

What do you mean wastegate pulsating?

[@180joz]

Hope that co star got paid well

[@Insaiyanrider]

Can you talk about back pressure for centrifugal superchargers

[@motoiq]

You need less

[@bobdobbs69]

Minor correction but for the 50mm wastegate the graph states: .32 kg/sec... not 40 kg/sec...that would certainly be an insane amount of flow!

[@motoiq]

that's a pretty major correction

[@bobdobbs69]

@@motoiq Well, you had the graph in there...

[@motoiq]

thank god!

[@Kanadian-Squirrel]

Should have asked this question before i purchased this product but does it clear the turbo and dp on a 2015+Sti? I bought the 45mm and casing is massive.

[@motoiq]

It depends on your exhaust manifold and where it places the wastegate.

[@weduhpeople8504]

How do you compare these to the Turbo Smart’s hyper gate external waste gate’s design? They seem to be very similar. What do you prefer a 4 port boost solenoid or two 3 port solenoid in a pull push configuration? Waiting for Garrett to release their electric turbos at the next SEMA show.

[@motoiq]

Turbosmart and Tial are excellent wastegates as well.

[@weduhpeople8504]

@@motoiq I’m using Turbosmart’s 45mm Hypergate with a 4 port boost solenoid controlled by Motec M142 to a Garrett G30-770. The only thing is the company who made my turbo kit welded the wg flange at a 90 degree angle on top of the .82 a/r turbine housing which isn’t optimal for flow. My fk8 k20c1 made 686whp 575 ft lbs on Church automotive’s hub dyno with a di and port injection full E85 fuel system with a surge tank.

[@motoiq]

As long as you are controlling boost its ok if your placement isn't perfect.

[@randoorlando443]

@motoiq, im not for sure if its been done or would even work on this channel but id love to see a video on how one could make a career out of what you do and how to get there. Its always been intriguing to me and id love to hear someone qualified to give a bit of there story.

[@motoiq]

It's a tough industry, its best to stay out of it, get a good education, a good job and do it as a hobby only!

[@sabz_bhp]

@@motoiq ah breaks my heart reading this 😅 but if someone of Mike's calibre is suggesting this then I suppose we should listen

[@randoorlando443]

@@sabz_bhp thats what i said man

[@AZ-hf9ow]

Clear eyes

[@SataniaMcDowel]

So if i want 6 to 7 pounds of boost i need a wastegate that clocks out at 6 or 7 or i get a one with more (like a 12) and tune it down? I'm currently needing a wastegate and im super confused still.

[@motoiq]

Your minimum boost pressure is generally a little lower than the spring

[@angelsanchez9539]

What would the benefit (if any) of a water cooled wastegate on a mildly built , daily driven street car such as an STI?

[@motoiq]

If your wastegate was in an area that has little air flow and a lot of radiant heat it could help life.

[@Boostedm3nace]

When moving to an external, is it required to delete the internal waste gate? I’ve never had a turbo car, only supercharged. This stuff is really great info 💪 Once I put a 426 in my hellcat, I want to pick up a high hp JDM project.

[@motoiq]

Yes you don't run both. The thing is, do you need an external wastegate? They are for high power applications where an internal gate can't flow enough.

[@Boostedm3nace]

@@motoiq got it. Definitely makes sense 👍

[@kalijasin]

What happens to the exhaust after it goes through the turbo? It gets burnt up in the engine?

[@motoiq]

Flows out the exhaust pipe.

[@k3p060]

Would it be a good idea to install an external wastegate with an aftermarket divorced downpipe already on? Right now I’m having issues with stock turbo and wastegate solenoid creating this type of shaking of the car at high rpm. Shop told me it was the downpipe causing the issue. Have no idea how to fix this please help!

[@motoiq]

You don't use a divorced downpipe with an external wastegate, the wastegate has it's own exhaust that you can dump or merge back into the downpipe. For a stock turbo, switching to an external wastegate would be difficult and not worth it.

[@Prowlgmail]

Not sure if your going Do video on in future. But guess some new Honda's got electronic wastegates not. Just bought new car in Feb and look into it that the waste gate is electric. And haven't gone into look at because of warranty. Once warranty up mite looking into it more

[@motoiq]

A lot of cars have electronic wastegates stock. Currently only Turbosmart makes an aftermarket one.

[@FunBitesTV]

How do these compare to tial in terms of reliability? thanks

[@motoiq]

Tial is really good too.

[@Elver_Galarga_jugo]

Wait, so should the wastegate pick up from the collector laid 15° in the flow of the exhaust or away? The diagram shown showed it laid away from the flow but I always had the idea that laid in the direction of flow would help with more flow

[@motoiq]

The wastegate should be leaning away from the engine, not forward toward the engine as close to the turbine housing as possible.

[@Elver_Galarga_jugo]

@@motoiq ok, so like an off ramp. Branch off in the direction of flow. Yeah, the image shown threw me for a loop on that one. That's for clearing that up

[@motoiq]

@@Elver_Galarga_jugo yes sir!

[@Mekanik.b]

My sister heard Mike talking and she said he sounds so dry 😂 meanwhile it feels more like asmr to me

[@geoXedge]

Can't watch this with out wanting to see more on the g20 and the b13

[@motoiq]

You can read more about both projects on MotoIQ.com 👍

[@DroidX143]

What's that tan/yellow car besides the GTR?? Looks sick

[@motoiq]

TE27 Corolla with a 2TG engine.

[@DroidX143]

@@motoiq Nice Thanks!

[@p0intdk]

So the "45mm" will fit on a 44mm wg flange?

[@motoiq]

If its a TiAl

[@rickkephartactual7706]

Do the springs lose tension over time due to the heat?

[@motoiq]

They sure can!

[@exothermal.sprocket]

All metals have a yielding point that is lowered with increased temperatures.

[@ozzysgarage]

How do these Garrett wastegates compare to Turbosmart ones? Both seem like solid options, let me know!!

[@motoiq]

Both are solid options.

[@sincro2439]

Everytime he says wastegate take a shot lmao

[@St0RM33]

Why you re-uploaded the video?

[@motoiq]

There were spots where the screen went black and spots with no audio so we had to re do it.

[@blownheadgasket_]

why does he look like he is about to laugh 😂😂