Boost Control Explained [GO FAST BRETT] 

He explains this so well, you could not know anything about turbos and or cars and still understand what he is on about. What a guy! Thanks!

These tutorials are a great way for the average Joe to gain insight into what the various turbo components do. Thanks for educating the masses😝🤓😎!

Bret is a great teacher! I like the way MCM is making these videos, one concept at a time. All of us had to learn it somewhere in the past so it makes things great for beginners or outsiders. I've learnt more with the super gramps series than with any other car show.

Boost is good and in this episode, Brett explains what it is and how it works - MAD!

Learned some things today; understanding how things work and not just what they do greatly improves decision making and diagnosis of potential issues significantly easier. Thanks Brett for giving up your time to share some knowledge with us.

Just weld the waste gate shut, unlimited boost baby

Would be interesting to see one covering crankcase ventilation with turbos and such, hell.. even an episode even just covering the topic in general would be interesting.

U explained this so well especially as when I redline my check injection comes on then says low boost pressure but only comes on when turbo tapers off .well understood

GFB = +500KnowledgeWatts being a mechanically inept owner of a GTD. I'm loving this series that explains the basics of turbo's.

Learned more about turbos in 5 min, than last semester in school. Keep up the good job mcm!

Great explanation. I have a much better understanding of waste gates and boost controllers now. I could listen to brett talk for hours.

I don't normally have the chance to work on turbos, but I really enjoy these technical videos. I do plan on throwing a small turbo on one of my old Willys one of these years.

These vids are such a great idea, i've always had N/A cars and was pretty clueless on turbo set-ups until now.

One of the best explanation videos iv seen about this subject...

i love the retro intros for mcm and this show. it reminds me of car shows when i was a kid

I literally knew nothing about turbos after buying an XR6t last week. Thanks for the killer vid man! Totally get it now cheers 🍻

i learned all of that watching your old videos

The old Corvairs had a different form of boost control. They had no wastegate or blow off valve, they used a small carburetor. A small side draft Carter YH (about 1 5/16" if memory serves). Which, on my 65 turbo promptly replaced with a Weber DCOE with 28mm chokes. The small carb not only controlled boost but make it very slow to build. It was a pain to tune but damn did it make power. Now with electronic control and FI it's amazing what turbos can do.

that a IS38 on the left. Shoutout the the guys on the MQB platform. Awesome vid Brett, looking forward to what is to come!

Thats awesome. Stuff you should know if you own a turbo.

Excellent job explaining complicated components

In the 90s we used to put vacuum Ts into the wastegate line on the dodge 2.2l to up the boost for less than a dollar.

Well u can't get it any clearer than that thanks for your time and services to us all.

very good explanations on boost control rate 100%

This might sound rather narcissistic, but it's intended as a compliment. Even when I know everything on the subject (such as this video about boost controllers) I still REALLY enjoy watching the video. Just because it's presented and edited so well!

Very well done video! Super quick and clear explanation of good ol turbskis

The video showed up at the perfect time! I think I have a faulty N75 valve on my 00' A6 2.7T, and this helped me pictures what's going on with my waste gate so much! (though it's still a bit different)

Great video ! Please do a video regarding the advantages & disadvantages of air-to-air and air-to-water intercoolers

Extremely helpful. How come nobody ever talks about the manual boost controllers: Where they go, and what they do. Not that I didn't already know, but thank you so much anyway.

This was very informative and easy to understand! Thanks Brett! Please make more!

I love the GO FAST BRETT. It's so useful!

"I like big boost and I cannot lie" ...? Surprised nobody beat me to this one.

Could have added a bit more to this. like the differences between an internal and external gate, as well as the affects of gate size and placement.

how about external wastegate? in the next episode?

Not all turbos waste gates work the same, newer models now works with vacum which is made by a vacum pump and electronicaly controled via engine management, you simply cannot use a leak offen valve as it waste gate needs vacum to close and not vacum to open.

This is probably a dumb question but why not just put a stiffer spring behind the diaphragm so it takes more pressure to open it?

Best video ever. Simple to the point , not a ton of fluff but still very entertaining. One thing I would like to see (and I see this with a lot of videos), an outro . if you could add a little Outro maybe five seconds of thank you to the viewers just to give me time to hit the like button.

Really loving these Go Fast Brett videos, he makes it so easy to understand :D

Such a simple but great video. Thank you!

How can you possibly dislike this video best one they made in a while 👍😊

Love this vid series, already know most of the content but still love seeing it presented like this. Keep it up.

Really cool series! You guys should do all sorts of things like this on cars with different experts, sort of like an MCM engineering explained.

This series is excellent.

Best 5 mins of my life

Hi Guys, could you do a quick episode on the difference between petrol and diesel turbos and how blow off valves (waste gates) affect each one. Thanks so much, love the channels and can't wait to see you guys on the Discovery Channel, been a fan since day one.

This is a well explained video. It gives me an idea how to eliminate the turbo boost control solenoid as a potential cause of a problem, whereby my engine suffers the occasional "hiccup' or 'misfire'. ( 2.0 Renault M9R diesel engine ). If the turbo boost control solenoid was faulty or sticking ( mine is making an odd vibration noise ), my assumption is that incorrect actuation of the waste gate valve might occur ( open when it should be closed and vice versa ). If removing the vacuum pipe at the waste gate, I interpret from your video that the gate valve will no longer open, and I am effectively running at maximum boost ( not ideal in terms of protecting the turbo from over-running and wearing out ), but I have eliminated the solenoid as a possible cause of the hiccup. Would you agree with that prognosis, or have any suggestions? There are no fault codes generated, and I know there could still be problems with one or more injectors. However, when I keep a constant speed at about 70 mph, the issue doesn't occur, but I soon as I accelerate or put the engine under load, the issue becomes apparent. Actually, sometimes the 'misfire' feels like a sudden loss of ignition and gives quite a sudden jolt. It's this behaviour and the noisy solenoid that made me think of investigating the boost and vacuum system. If the boost pressure sensor was detecting too high a pressure, because the valve was not opening at all, I would expect a fault code. However, if the gate was opening and closing erratically because of a badly functioning solenoid, perhaps this could result in a sudden loss of boost. I'm not sure what impact a suddenly opened/closed waste gate ( as opposed to a gradually opened or closed waste gate ) might have on engine performance. In some ways, this is why I prefer the simpler version of controlling boost, and not the electronic version.

I have a question, lets say my wastegate and actuator were not operating properly (staying stuck closed) causing an overboost situation under boost. By removing the restrictor pill ( in a 2 port boost solenoid) will make the car run to the minimum wastegate pressure? or will still be over boosting?

I'de like to see an episode on turbo wear. Such as wear on bearings and stuff. Maybe even how different setups wear out a turbo like single and twins and which ones put more stress on a turbo. Also just general tips on keeping your snails happy for as long as possible.

That was a fantastic explanation. Love this series

Nicely done. Thanks for the video.

Excellent explanation, job well done guys

Damn Martin!, back at it again with them terribly funny/bad car puns LOL.

Perfect. was wondering if I could lower boost. Now I know. Thanks.

im loving this series. keep up the good work.

So what about the "double your wastegate pressure" rule when using a boost controller. If you have a 7psi Spring, with a boost controller you'll only achieve 14psi give or take. Or the differences in 3 vs 4port electronic boost controller solenoid me.

very good explanation

Great Video

good video, very helpful, I did not realize thats how manual boost controllers work, very interesting! I wonder what goes on inside there

Please keep doing these. Alot of these.

Brett loves big boost and he cannot lie...

So it actually builds up the pressure by first closing/fooling the 'sensor' and then opens, what makes the turbo spool turn faster. A bit like squeezing a water hose.

I would like to hear Brett discuss Anti Surge Compressor Housings.

These videos are fantastic

What’s the difference between Boost pressure, boost pressure raw value, and boost pressure set point .. thanks for your time

That shocking made me sub!! Brilliant

These videos are great, love the info!

I love this series already, MAAAAAAAAADD info

Very well explained, thanks.

I really was hoping to learn where to put the Boost Controller on a External Wastegate setup

Love this stuff. It might be nerdy, but it's my kind of nerdy. Please Sirs, may i have some more?

This video was great.

That was great! Loving this series!

His name could be an engine code. BR3TT

Awesome VID!!! Would you be able to increase more boost if upgrading the forge internal waste gate actuator as you can change the pressure springs

Can someone explain to me what happens with the AFR when cranking up the boost? Does the stock ECU adjust the fuel properly for the increase in boost pressure to make sure the car doesn't lean out?

Boost control is good get a manual one but always fit with a pressure gauge

Hey love the video but can you guys do a video on how blow off valves work in line with boost controllers

Great video!!! Answred a lot of questions and theory's Iv had

Good video guys, but you should of put a warning at the end about just turning up your boost without extra fuelling, as we know too much boost and not enough fuel equals bad times for the engine !

Very well explained video.... Keep it up

Really good thanks Brett!

Keep up the extra content

Can you make a video or comment back. With the electronic turbos can you put and blow off value or a boost gauge connected up to it ? Pls reply

Perhaps you should have covered the differences between an internal and external wastegate, for those out there who do not know?

Does turning the actuator up, the only way here that will increase boost?

Sooo good! Clear as explication! Shot

Great video guys!!

I find it funny that Australia is "so metrical" , that they say KW instead HP, but still saying psi instead kg/cm2

6 seconds in and Marty already made a bad pun. I think that's a new record

One thing you did not include in your comments, is that the motor may only be able to accept so much boost or you may over pressurize the cylinder and cause other troubles. Be careful when increasing pressure to the motor.

Thank You! This says it all!

I got confused about when he said to increase the boost control with those hoses, how does it work again?

So if this little flap is wide open you get lowest boost, and if it's closed you get highest boost, right?

This was an awesome video. Thanks.

can the wastegate be left alone without a reference? will it still bleed some of the exhaust gas without being locked shut in some way?

wow this is interesting, so i can make my own wastegate "pressure-thingy" and put it on the dash and controll the boost from there!

The electronic boost controller you talked about, is it similar to what other companies call a 3 port boost solenoid which is controlled by the ecu with a tune?

I have an idea I would see if it would work or not see what everyone would think if you could put 6 turbo s on a car or not and I was wondering how much power it could make

Good job bro your videos really helps me thanks

I subscribed just cause he showed up with shocks😭😂