BMW B58 Turbocharger: How it works

[@kirill6020]

The best review!

[@nathanbulldis817]

I’m 45 and have had this explained to me several times. Never in my lifetime has it been explained so thoroughly, thoughtfully, and perfectly articulated. Thank you, sincerely.

[@NoBrainerTalk]

You are very welcome.

[@simplelangperorock]

X7 xDrive 40i iL6 B58. Thank you thank you thank you for making this video. Now I feel like a mechanic. 😅

[@DjNikGnashers]

This is university level of detail and accuracy. Absolutely 100% respect to you for making this video. I have the B58 in my M140i (I suspect the original design), and it is quite a detuned engine, meaning potential for massive increases in power with a few parts and a different map.

[@Sequel7]

Yea the b58 is fast I drove the 2021 540i

[@DjNikGnashers]

@@Sequel7 Indeed matey. It seems any version of the B58 is fine on stock internals up to about 650bhp. Some seem to be running 700+ on stock pistons and no issues yet, incredible really.

[@Sequel7]

@@DjNikGnashers we shall see how long it will hold up with any tune up to that horse power.

[@malx7756]

Surprised you don't have more subs. excellent content!👏

[@mirageycq]

Thank you very much. Now I understand how my turbo on my B58 work. Very good explanations.

[@MitchM240]

I just found this channel WOW. As an owner of now my second car with a B58 these videos are AMAZING! You got a new sub from me and keep them coming!

[@peterkukolik8402]

The best video on this channel so far. Thank you very much.

[@NoBrainerTalk]

Wow, thank you Peter!

[@densenhandra9388]

Many thanks for this. I watched 5 videos before this and found them useless. Can only understand how it works after watching this.

[@gerryhageman9857]

As good as it gets! Great job.

[@rodackor]

Amazing content, really liked the explanations with diagrams and animated videos, well done

[@NoBrainerTalk]

Thank you, really appreciated...

[@fafinaf]

Holy cow thank you for this! I'm a visual learner so this really helped me understand these systems. My understanding of everything was so compartmentalized before now it's all come together. Thanks!!!

[@julienxdarrell]

Listening to this while driving my B58 😎😎😎

[@michaelzerbe]

Nice level of detail.

[@troywhitehead2183]

Another excellent video. These videos are very informative and useful ! Thank you

[@NoBrainerTalk]

I hope you like tomorrow's video...

[@catinthehat5140]

This engine is a flawless inline 6

[@alfredcamilleri9238]

Thank you so much for the quick response. Very helpful indeed. Keep up the good work. 👍

[@saadhussain7910]

At 5:40 you said that increasing the pressure and temperature decreases the density. Isn’t density directly proportional to pressure and indirectly to temperature? Wouldn’t the increase in pressure increase the density?

[@NoBrainerTalk]

Hi, yes you make good points, and as you say it is the temperature increase which decreases the density, so in effect the density decrease from temperature increase is countering the density increase that pressure increase offers, so the intercooler is there to decrease the temperature of the pressurised air to make the air denser.

[@saadhussain7910]

@@NoBrainerTalk Yeah that’s also what I was thinking. Really informative video regardless.

[@D3RV15H]

Nice video man!

[@s.a.r.2493]

No hablo inglés y aun así entiendo tus videos. Das información muy detallada el B58. Como propietario de un M140i te doy las gracias.

[@NoBrainerTalk]

Muchas gracias :)

[@aarondostou3888]

Honestly.... excellent

[@genuine_legend]

I have this engine. Great video

[@christophermoss4295]

Fantastic video and very informative, well done!

[@twinturbo8304]

nice job

[@pranavk8293]

Is there any information known about blow-off or bypass valve used on the B58TU engines?

[@NoBrainerTalk]

1st gen B58 and B58TU1 engines have an electrical wastegate valve (so regulate the exhaust side of the turbo to control boost), but B58TU2 engines seem to have a blow-off valve (so regulate the intake side of the turbo to control boost) . The reason for this change is unclear, but if I had to guess, venting excess exhaust gases vs venting intake air to regulate boost might have some impact on emissions. With the 48V mild hybrid assistance system as standard on the TU2, the B58TU2 might afford to sacrifice some minor performance from the engine itself to achieve reduced emissions. This is pure guess work.

[@GU_WOP_O]

My brain tells me I should get a Mazda CX-9 but my heart tells me I should get an x5 with the b58

[@Bigboss86652]

Perfect 👌

[@martijndevries5059]

Nice, can you tell me about tuning stuff for the B58 engine.

[@NoBrainerTalk]

Hi, do you mean what options you have to tune the engine? Oh man there are so many, it would deserve its own video.

[@martijndevries5059]

@@NoBrainerTalk yes !the best options on the market. How far can you go with the standard pistons of the B58. What can you do in terms of upgrade turbo? Seems an interesting video about how the block is designed. keep it up

[@anthonyh958]

Very,very good. 👍 Maybe you could explain the reasons why the upgrade to B58TU turbo including the high pressure fuel pump next? Just an idea for you

[@NoBrainerTalk]

Awesome, I like the suggestion!

[@paulrakis]

Is the B58TU better then the Gen 1 B58. Im thinking buying a 2019 X3 M40i with the Gen1 B58 motor. Any input anyone on that? Thanks. Great vidoe brother.

[@NoBrainerTalk]

In stock form, the 6-port B58TU1 with 382hp (if it also has 48V mild-hybrid assist, which some B58TU1 cars have) is arguably a better performance engine than the 1st gen B58 with 340hp. The 1st gen is simpler and arguably more over-engineered and likely to be more reliable, especially after modifications, than the 2nd gen. Both generations are exceptionally good engines with alot of upgrade potential and it's likely you will be happy with either. It all depends on budget and plans. Of course when buying used you also need the previous owner(s) to have taken care of the engines. Hope this helps...

[@paulrakis]

@NoBrainerTalk Yes thank you. I'm not upgrading anything so I will go with a Gen 1. Yeah The 2019 X3 M40i is alittle cheaper then a 2020 model year. Yup I'm always looking at the car fax to see the oil change intervals. Thanks for your help 👍 👊

[@alfredcamilleri9238]

Thank you for sharing this. I wish to ask for some assistance please. I M about to buy a used M140i 2018 with 21,000 miles. Anything I should look out for? Also if there a way of checking engine oil level ?. Thank you

[@NoBrainerTalk]

Hi, here's a link with some advice. www.whatcar.com/bmw/m140i/hatchback/used-review/n18884/advice The standard advice when buying a used car applies of course. Also check the coolant in the expansion tanks (known issue that the B58 loses coolant) as well as signs for any coolant loss in the engine (dried coolant residue), and check for rattles from the exhaust (know issue that stock exhaust can rattle). Check if the radiators (intercooler and auxiliary) have stone guards, and if they don't check the radiators for damage and leaks.

[@acz88]

You can check engine oil levels under vehicle status in iDrive. Mileage is low but still check to see if oil changes were done. Future problems could involve carbon build ups, leaks from valve cover, cracking of plastic charge pipe, thermostat and water pump failure. These are minor repairs if you get them done at non-dealer mechanic.

[@Lse380]

Well done👍

[@ashegheaty]

What is the Max rpm of the turbo in the b58 engine ? 250 k rpm ?

[@NoBrainerTalk]

I don't know, someone would need to install special sensors to determine that (on a Stage 2+ tuned engine that is achieving the maximum power possible from the stock turbo), or perhaps it can be deduced mathematically from the power output of such engine. I doubt we will ever know unless we happen to speak to the development engineers who designed and tested it.

[@firewire086]

Does the M340i uses the B58TU?

[@NoBrainerTalk]

Yes, if it's a G20/G21 (M340i) then it has a B58TU and if it's a F30/F31/F34 (340i) then it has 1st gen B58.

[@harbl2479]

Nice in depth video. Are you an engineer?

[@NoBrainerTalk]

Yes. :)

[@harbl2479]

@@NoBrainerTalk It’s quite obvious from your technical videos :) I also own one of these cars and have a wealth of knowledge about them, so if you ever need any advice from a fellow enthusiast :)

[@NoBrainerTalk]

@@harbl2479 Thank you, that's very nice of you.

[@vladimire1433]

Which car do you have?

[@NoBrainerTalk]

M140i

[@vladimire1433]

@@NoBrainerTalk HOT HATCH!

[@JTa-l6y]

B58 dosnt have a mass air flow sensor at the airbox. it's a air inlet temp sensor. B58 uses speed density. Not mass airflow.

[@NoBrainerTalk]

You are not correct because the B58 uses Mass Airflow Sensor Part Number 13628605565 (made by Bosch). It might also measure or help the ECU calculate intake temperatures and gather other data.

[@JTa-l6y]

@NoBrainerTalk may depend on gen 2 or 3 b58 as I have a supra with the gen 3 b58 and it shows as a air inlet temp sensor. There is also a variation of a 2 port cylinder head and a 6 port cylinder head depending on year the car was built.

[@WilliamAbbate]

I thought it was twin scroll

[@NoBrainerTalk]

Yes it is. This means the exhaust manifold feeds the air into the turbine in two separate streams so that each cylinder exhaust gases interfere as little as possible with each other (resulting in improved scavenging of the exhaust gases and less impeded flow into the turbine).

[@oceanthirteen1628]

Twin scroll = single turbo

[@dgdave2673]

Great content, annoying BGM. Pls remove it or lower the volume .

[@NoBrainerTalk]

Thanks, the feedback for the background music is well received. I have it in mind for the future videos but for the existing ones, don't think I can change it.

[@chippyjohn1]

You aren't even using the B58 engine as an example!

[@NoBrainerTalk]

After all that work I put into it, I see you are very hard to please.. :)

[@chippyjohn1]

@@NoBrainerTalk I was wrong, was looking at the supra engine, but noticed at the end you did display the turbo for it. Good description and effort. Would be nice to know the turbo specs.

[@Slaktrax]

Please remove the music, not everyone has perfect hearing!

[@NoBrainerTalk]

Hi, thanks for the feedback. Yes I am aware that occasionally the background music comes across as too loud, I can't explain why some people are experiencing this, while most don't. I have certainly taken it into account for the later videos, so some feature no background music and I have reduced the volume of the background music in the latest videos.

[@Tupeutla]

i like all your videos , but please make something about the sound , buy another microphone or something it's anoying

[@MrJackoable]

This video is like fairy tale for adult men.