Inside BMW's QUAD TURBO 3.0L Diesel Engine

[@Dustrunnersauto]

What do you want to see next? 👀

[@santiagopenanavas]

To cover the OM617

[@goomanhlr5697]

Mercedes M112 engine

[@Zchef85]

Desmodromic valve engines

[@Roddy_Zeh]

Can you talk about the Q7 V12 TDI's unit?

[@premiumxperiments6059]

N57 please

[@realRickSanchez]

BMW realized turbos were getting too reliable so they added more to increase the chances of failure. 💪

[@MikeyB_1972]

M57 turbos don't usually have problems. Ran mine stock for 150,000 miles before I upgraded. Sold them for $500.

[@markbroad119]

"you don't have a car faster by putting more parts on it, you make it faster with Nitros" Reno 911

[@shitpostcentraI]

@@MikeyB_1972 my M57 has an original turbo at 313 000km (almost 200 000 miles)

[@fpj6490]

@@shitpostcentraIhow many km (miles) you’re drive before oil replacement ?

[@baoquoc3710]

S58: *what's unreliable?*

[@fabien59]

That's quite fun to hear "3L is a small engine" because in Europe, that's very very big for an engine, even a 2L engine is considered sporty

[@Austrium1483]

Yes in todays standard for sure. But back then 2l was considered nothing

[@stefanburemo9661]

I love my 2L BMW 1 series diesel and the 2.5L 3 series I have.

[@everything777]

​@@Austrium1483no. That's always been the case in Europe, or at least for the last 40+ years

[@epbski]

To be fair, VW Group did offer an amazing 4L V8 TDI twin turbo on several models in Europe until a few years ago. And in the past, they sold a V10 TDI and the 6L V12 TDI twin turbo. In recent decades, even in North America, engines have been getting smaller on average. In the past, big V8 engines were an American classic, but now they are rare. Some of the only new cars with a V8 are, for example, the Corvette, and high performance versions of the Mustang. But those are sadly only gasoline, not diesel engines. Certain pickup trucks and very large SUVs are the only place you'll find big displacement diesel engines in the 6L range. But even GM is only selling a 3L diesel these days on new large models.

[@MrWaheedulHaque]

@@stefanburemo9661 do you have a spare extra bmw for me hahaha, i got 2 litre petrol bmw very bad engine N20

[@lowermichigan4437]

That sounds amazing and terrifying to own outside of warranty

[@LBZDreamer]

Not really, it's a very simple system. I've seen 4.0L diesel engines in the agriculture in order power small farm equipment.

[@briankuhn7396]

@@LBZDreamerThe turbos will be the first thing to fail. And there’s 4 of them.

[@313soldier313]

I absolutely shudder at the thought of a 2nd and 3rd owner of one of these things.

[@timessix8434]

Probably very on point.

[@germanicmechanic7105]

It is, thankfully there are only a few of them on the road 😅

[@Losingsince]

I really wonder how reliable these new high-output designs will be in the long run. The new 3.0 Duramax is especially interesting because it uses an aluminum block. Then again, the diesel engine that powered the Soviet T-34 tank also had an aluminum block and it lasted a while....

[@alainaguilar9938]

First hand experience with the 3.0 Duramax. It's a joke. Definitely stick with the normal Duramax. Never thought GM would make an inline 6 harder to work on than a v8

[@luclanglois9086]

@@alainaguilar9938 yea ive heard its pretty ass to work on

[@JohnSmith-lf4be]

T34 engine didn't last long

[@Losingsince]

​@@JohnSmith-lf4beby lasted a while I meant stayed in production...... Soviet engines were crap in general....

[@RohanSanjith]

These modular engines i think uses same type of crankshaft which are capable of handling 1000hp

[@avioncamper]

Could you imagine a 7 series achieving 40mpg? That would be killer.

[@user-mf2gr3cz6e]

My 20 yo 5 series 20d gets that on the highway

[@peto22]

Joe Achilles achieved 67mpg when he drove from London to Madrid in the -16 730d. There is a video about it on KZbin.

[@NeoNacho]

US spec bmw 740 Ld gets that stock

[@seanlovi8798]

@@peto22 True... i watched it... that was simply insane

[@siittavaa]

I get 50mpg with my 10yo 3serie 20d

[@custommotor]

Honestly the tuned power numbers were not that bad considering it's a 3.0 liter motor with small turbos. Honestly think that's pretty good overall.

[@JGV_IX]

Thanks for the video! Currently driving a ‘23 X5 M50d - bought it just before the LCI to get this engine - not disappointed at all! Feels more alive than the M40i Z4! Really a magnificent engine 👌🏻 In South Africa about 2/3 of BMWs are diesel - good power with great economy - it’s a pity they killed it off and all we have is the 30d with the sample hybrid system 😩

[@Msunuwakho]

m50d smokes even on a 2022 car even the m40d smoked, idk

[@Misterspankiej]

Well. Belgium just saying FY to diesels with low emission zones... too bad

[@BPF80MCar-vi1pg]

I cant complain about my twin turbo s55 its a monster

[@eduardojimenez2044]

Don’t fret. The engine’s back in 2025

[@Scott-mv1fk]

The M550d B57S with the 4 turbo's is actually a very robust and stable engine. We have several clients in our shop that have them, no engine issues at all, not even a higher kilometers (200000+). The previous N57S engine did have some issues, specially when tuned. Tuners did not understand the 3-turbo engine then and overdone it. The M550d B57S can safely be tuned to 480HP and 900NM (even 1000NM, that is the ZF torque limit). Alpine still uses this engine in the D5S, it's a real gem.

[@klotzalexandre9249]

is the B57 (330/340d) that reliable aswell ? i've read a few topics here and there about some kind of intake swirls/flaps that had some play therefore popping a CEL

[@bombardier6033]

One of my colleagues from university has a mechanic shop in which he does mostly BMW's. This 2017 750Ld came in the shop with some turbo problems. The quirky thing about it was that it was an ex-government car and it came with a 40 horsepower bump from factory. I got chauffered around on a little test drive in the most important place in that car, the rear right seat. Even with its faulty turbos, it glued me to seat and was quiet all the way up to the redline.

[@muhammadhanifkurnaen6689]

One thing that B57 make happy is it share simillar block construction to B58. So BMW make both diesel and gasoline engine on simillar cylinder block. And diesel usually run with higher boost from the factory. Thats make B58 very strong because the block has same standard as B57 does.

[@soundseeker63]

That explains why they went back to the closed deck design for these engines. They need to handle the high compression ratio and torque output of the diesel versions, so are perhaps over-engineered for the petrol versions.

[@koiflichrl1974]

I drive an m550d estate. The torque never gets old, this engine is a masterpiece

[@Enko063]

This "masterpiece" has been cancelled long time ago. 😂

[@koiflichrl1974]

@@Enko063 that's what EU regulations to do modern engines that are designed for performance

[@Enko063]

@@koiflichrl1974 Also it has been unreliable. God help for second and third owner. 😂

[@soundseeker63]

@@koiflichrl1974 Diesel ones, yes. Still plenty of good petrol engines out there, though probably not for much longer.

[@MikeyB_1972]

The M57 with two CP3's and a couple of Tim's turbos = 550-600hp, 800trq

[@They-call-me-G]

You got any experience with tims turbos? I have a m57 in a 335d and been looking at Tim’s turbos stage 3 but I don’t know anyone whos ran them.

[@LBZDreamer]

dual fuelers in a m57? What size injectors is it running?

[@MikeyB_1972]

@@LBZDreamer stock. The injectors are not the limiting factor

[@MikeyB_1972]

@@LBZDreamer Stock.,.They flow pretty well.

[@Dsandss]

Driving my deleted M57 now! Love it!

[@Mattthewanderer]

This is the stuff I need to catch up on modern engines. I've ignored it for over a decade and there is a LOT to learn now.

[@jamesdjukic]

I’m from the U.K., I got a BMW 335d in 2014. On a warm dry day, with launch control, it’d do 0-60mph in about 3.6/7 seconds! Very quick car 🔥👍

[@diecksl]

Years ago (2012) I talked with a BMW tech about the N57D30 (Tri-Turbo) engine about its reliability: "Usually the first customer of a car with that engine is a lessee, so he/she does not care about repairs as the car is sold after about two years. But beware if you're the 2nd or 3rd owner - even minor repairs are expensive because we have to remove the engine from the car as everything is so crammed inside the engine bay!" (and we're not even talking about BMW OEM spare part and labor prices...).

[@LamantinoElettronico]

6:28 the 10 injections per engine cycle thing is a staple of modern common rail direct injection diesels, basically fuel is injected gradually instead of all at once, which improves power, torque, performance when cold and emissions. It was actually pioneered by FIAT who patented the JTD system (jet turbodiesel) which later evolved into JTDm/Multijet and later still into Multijet 2 and 3, which is used on FIAT group (FIAT, Lancia, Maserati, Alfa Romeo, Jeep and so on) diesels up to this day. This system was sold by Bosch and formed the basis for all contemporary crdi diesel engines including VW group's TDi, Peugeot group HDi and BlueHDi and BMW and Mercedes diesels

[@soundseeker63]

Its for refinement. Nothing to do with power.

[@star_scream9349]

I've been longing for a B57 deep dive video thanks mate

[@tomislavbarisic48]

I own 550d, g30 with simple ecu and gearbox tune and i achieved 3.5 sec 0-60 and 11.6 sec on 1/4 mile. Car is fantastic. 190000 km on clock and everything fine

[@jerridehlinger9689]

I dd a older bmw m57 i6 twinturbo it's tuned to about 400hp 600tq 40mpg. I've been very happy with it runs mid 12s looks good and cheap to run

[@joshuaadesida]

I heard about this engine couple months ago, and I was waiting for someone to make a comprehensive video, so thank you!!

[@mindcreek]

I drive this engine daily in g31 2018 m550d, it is like nothing I have ever driven, such power.

[@Altezza1999]

If this and the B58 share blocks then why not put a dipstick on the B58 too then!?

[@XcoolcoolbeansbeansX]

You can if you want to. There actually is a machined dipstick hole at the bottom of the block. On the stock B48 and B58, it is used instead as part of the crank-case ventilation system, filled instead with a fitting for vent hoses. I’m sure there is a way to run a catch can instead and run a dipstick The newer V8s and V12s have dipsticks

[@deibriceag]

2:00 From my knowledge the b57 did not have 3 turbos, only the n57 did

[@kaismueller]

There is a B57 variant with 3 turbos- in the Alpina D5.

[@deibriceag]

@@kaismueller Seems that you are right. Thanks for the info

[@TheBlaert]

Friend of mine has a 2021 M50d. An absolute beast of a thing. It just keeps pulling and pulling. He's a sucker for punishment though as he used to own a triple-turbo version (2014 I think) which blew all 3 turbos and wrecked the engine

[@daniellundin8543]

Thx, please can you do one on the N57-series?

[@GamerGabbar]

Alotta guys prefer the single turbo 30d models (530d, 730d). This is because there's aftermarket parts available like turbos that can increase power.

[@Hitman-ds1ei]

Would love one for retrofit ! Minus all the exhaust crap !!

[@ZephyrCorsa]

Their naming system make's complete sense and gives most of general information needed on the equipment and design.. Whats the issue

[@g2skinny]

I bet that would be really fun to work on when the time comes all of that in a not real big engine compartment

[@AzanAli-]

Imagine these turbos failing 😂

[@baoquoc3710]

Just buy another superior turbo compared to this - what's so hard about that?

[@hairtrigger2438]

@@baoquoc3710you honestly think it’s that easy to just find another “superior” turbo for an engine that was designed with its own one off setup like this that will bolt right up huh? 🤦🏼‍♂️

[@kaeji_namitsua]

If one fails you have 3 more left its not that big of a deal.

[@baoquoc3710]

@@hairtrigger2438 what kind of turbos that's one-off? Just a snail spinning boy that pushing air into the na block and a failure turbo didn't made it the end of the world, do you have to complicated your thought about it being something that so out of ordinary?

[@soundseeker63]

@@kaeji_namitsua 😆🤣 If only it actually DID work like that!

[@danked6731]

Can we put in 4 hybrid turbo's?

[@mgstony847]

Why not lol

[@markbroad119]

Neighbor has that power out of a 2011 3.0 diesel 335D. Egr delete and tune. At 85mph we were getting 54mpg.

[@michaellk2254]

Diesel is the future and answer to the automotive industry. Not electric

[@Paddysteele11]

I agree! What people don’t understand is that a new diesel with emissions systems are net 0 emissions.

[@Only_Ameen04]

Too bad Dieselgate happened

[@maxwagner5502]

No. I'm also a big petrolhead, but in terms of Environment an electric car is already way better than a Diesel engine. I don't like this fact, but therefore this fact should not be denied.

[@mitchell5064]

@@maxwagner5502you are completely wrong.

[@prc7148]

​@@maxwagner5502to make one battery for your electric car they produce 10× more gas in the atmosphere.

[@kungfuhustle6363]

The M57 twin turbo setup was more than good. Them engines to this day will always be superior

[@daniellundin8543]

Finally, been waiting for this engine, thx!

[@mariusfridlund55]

n57 got 3 turbos, b57 4 turbos🤩🤩

[@alexprost7505]

Was 3, now 4, just evolution

[@swakage13x]

Could make an interesting option for a supercar motor built-in someone's garage using a Porsche Trans axel And you take off a bunch of those emissions standards And slightly upscale the turbos that are built into it I mean sure you will lose some miles per gallon Going to somewhere about the thirty's range But I think that would be just fine Although you would just need a trans that is built to handle the amount of torque

[@sresto7943]

And in the real world the Euro 6 engines are finding all of these emission gimmicks are being deleted by garages just to run by 60k miles, they just dont work for long enough.

[@TheWeavingBagel]

BMW's Tuner ALPINA still makes the Quad turbo diesel engine for the XD3 and XD4(Performance diesel versions of the X3 and X4). They have made an even more powerful tri turbo diesel engine which goes into the 400 Horsepower range and can be found on the D5.

[@mochabear88]

Love turbo diesel schemes

[@cihans4923]

You know you’re American, when you refer a 3L straight 6 Diesel as small 😂 In Europe people would hate you for driving that thing. And I love it 😍

[@Ecoboosttookadump]

Awesome another BMW engine to breakdown every week

[@gijsautomotive1217]

This thing is made to blast the Autobahn. Doing high speed for long time at low revs without having to stop for fuel. I drove one of these from Stuttgart to Munich and just one and a half half hour.

[@andydelassus2734]

That 750d has the same ZF trans as a dodge demon, no? Shouldn’t it handle torque just fine?

[@skumbag_industries]

So are we able to put them turbos on a m57

[@connor3288]

This would give scotty kilmer a stroke! Endless money pits!😂

[@Angelo-fo8de]

Only a moron would even watch Scotty !

[@487shawntower4]

Question does anyone know the dry weight of the N57 or the B57 diesel engines??

[@johnettipio]

5:17 WOW a BMW with turn signals??!!

[@ivanjovanovic362]

Aluminum block + 4 turbos = best reliability

[@pandekoi7476]

Really nice video but I have a sugestion for you. I for one am an European so I don t really know what the torque figures are translated to nm. Maybe you could add metric calculation in your videos as well. As in HP to kw, ft-lb to Nm and mpg to l/100km. Would make it a lot more enjoyable to watch for me. Otherwise great content!

[@matejunsagris]

i like M57 with bi-turbo and it has higer potencial and less parts to break

[@antor.j.medrano]

I can only imagine what this thing cost.

[@Kerman_von_Braun]

tbh, bmw i6 diesels have the best turbo transience of any boosted motor ive ever driven. With the newer ones, power is near instant and there is borderline no spool time. They feel like low rpm v8's

[@jonathanjones8044]

My 2011 335d M57 sequential turbo is a ton of fun. Quick but very expensive to maintain. I fear the infamous #1 main bearing failure though. My wife’s 2006 MB320 CDI OM648 is much more reliable. It can be “hot-rodded” to 300 hp/550 lb/ft of torque at the wheels while getting 40 mpgs.

[@tonydiesel3444]

CDI for 2000 the guy I bought it from here to his car had seven hundred thousand miles Annie drives it all across America currently

[@shadowsiren3058]

I have an 09 with the m57 with emissions equipped. Could you tell me the possible unscheduled maintenance on those cars so im ready to pour a little cash into it. Right now im in the process of replacing the thermostat, and swirl flaps delete. I saw a little leak from the small oil line from the small turbo. And also saw the vacuum lines are becoming brittle that also needs to be replaced. Overall the car runs excellent. I minus test all the glow plugs too before winter comes.

[@jonathanjones8044]

@@shadowsiren3058. Couple of more things, examine the harmonic/dampener balancer very closely. If it is bad, it will take out the main bearings pretty quickly. Look for cracks in the rubber portion. If your AC quits and the charging system light comes on, it is about to leave the “chat” if it hadn’t already done so. And lastly, change the oil/filter every 5K miles. The 09s and 10s appear to have less problems than the 11s do. I think BMW sold about 10K of the 2011s versus maybe 2,000 for 2009 and 2010s combined. Since there are about 5Xs of the 2011s may explain the higher bearing failures. Some speculate that BMW may have received some faulty main bearings. Fun cars to drive though. Look up Santger Performance Development (SPD) on KZbin. He has a 335d (probably 800+ hp) that he drives to the drag strip, runs 9s and drives it home.

[@TruePurpleHaze]

​@@shadowsiren3058harmonic balancer is something to look out for. If it has any cracks change it

[@XcoolcoolbeansbeansX]

Your 335d has a version of the M57 not prone to that issue. There is nothing infamous about it. Completely irrelevant to your e90 335d

[@arisgod2749]

I wonder what it would be like for marine applications. How well it would be for a 400 HP outboard diesel

[@jasonligo895]

Definitely a fascinating motor in it's own right. One would think that the CO2 emissions would be relatively low given its impressive fuel economy.

[@Corvacar]

That is a good logical thought. However, anything that burns creates CO2. Perhaps the CO2 per Mile would more accurately fit Your comment. Logical thinking! 5:47

[@chrisjames2079]

*it comes down to particulates

[@joes.7536]

I want to see a triple turbo setup. 3 different sizes. Little to big. So you get response big power up top and everything in between. I’m sure they could do it with their new electronic waste gates. They can make the turbos do anything they want with software.

[@diecksl]

BMW did that about ten years ago with the N57D30 Tri-turbo

[@soundseeker63]

It was two sizes, two small, one big.

[@TheWeavingBagel]

They can't fullfil everything you asked but there is the ALPINA(bought out tuner by bmw) D5 that uses triple turbos.

[@terford1995]

i think an good comparison is the eaa288 2.o bitdi . 240hp 500nm of torque and a good fuel milage of 6 liter in a station wagon with a 7 spd dsg and 1650kg weight

[@sanjaemullings]

Would love to see someone build one with no restrictions maybe large single or one large and one medium turbo set up....

[@liamlindsay1458]

Thats what the n57 and m57 lineup is for. Been a few people now making 1200nm and 550+hp

[@yourfriendlyneighbourhoodb7933]

Mossellman turbos or what its called offers upgraded turbos for the b57. I can imagine it to be a pain to install but still there are options, and those who rly want to reach 500hp will be able to do it.

[@akros9333]

It's normal that you might consider a 3.0 small....but you forget the OM606 from Mercedes..... easily capable of more than 500 bhp with stock bottom end with some cars reaching close to 700. 1.9 TDI known as the PD130 from VW with not much work close to 300 is possible and with some Engine upgrades upwards of 450 . I myself have such an engine in a Passat with 330 at 2.3 bar ..... absolute blast to drive!

[@Azurael]

Big turbo = big turbo lag and no low down torque. Might be a blast to drive but I rarely pass 2000 RPM in daily driving. Plus you can't really build those old engines to that kind of power without leaving a disgusting smelling, carcinogenic smoke screen behind you. Not really what I'm looking for in a daily driver.

[@mttv8000]

about the after market power upgrades, you can get 530hp and about 830NM from that engine with a stage1 a stage 2 where you remove the dpf would get you about 570 and almost 900NM. However that engine and its predecessor were made to make a diesel engine "feel" like a petrol engine. I personaly have the f10 m550d and its running with a stage 2 490hp 872NM for 4 years without problems though I removed the AGR, "Drallklappen" as we call them in German and did a few other tweaks to make the engine last longer. But after market wise you cant upgrade the Turbo chargers as far as I know due to the architectur of the blowing system I think am not so sure about that topic tbh...

[@v_stands_for_value124]

This thing will be funny to repair out of warranty 🤣🤣

[@DieselPurge]

😩😩

[@h.u.l.k.7072]

I own a 2017 BMW 750d xdrive for this engine alone. I freakin' love it.

[@jstoneracing]

Is that American mpg?

[@rsk4976]

I´m driving one of these and it´s great. Mostly driving calm. But when i need ist, the Power is magnicifent.

[@OomGielie]

Search 'M2 50d' , a swapped M2 in South Africa making 600hp and 1000Nm+, running on watermeth and Nitrous.

[@MrWashesp]

At the mechanic getting a turbo done. "Yea you might as well do them all so we don't have to pull the engine 4 different times.😂

[@fabini14]

I hope that this b57 is better than the n57, because n57 have issues with bearings, oil pump and chains, mainly the high hp versions

[@victortaveira8271]

Another beast, and b57 is the right reason why b58 is so good. If bmw applied the latest iteration of vanos system, b57 would have get near 600bhp reliably

[@fabini14]

@@victortaveira8271 Diesel engines never uses variable cams lol, M57, N57 or B57 never have variable cams

[@timothyho6499]

Once someone has a quality delete system for all that horrible emissions equipment, I bet those could make massive amounts of reliable hp and torque

[@SonOvaBoss]

please do the triple turbo next, the previous generation

[@rafsacovers]

Imagine this engine swapped in BMW 3er and AWD. That would be a killer.

[@1960cool1]

I believe you can still get them from Alpina because they don’t make a whole lot of cars a year but only in Europe

[@eriktonev3797]

"Just a small 3 litre."

[@KNAnime1]

In simple words 2 small to reduce turbo lag and 2 big for more bhp

[@markchapman2585]

Love this channel. Lot of great information. Thanks for the great content cheers from Canada 🍻

[@aryandhiman404]

BMW came with 50d 3 and 4 turbo diesel engines way before Audi’s SQ7. Great video nonetheless.

[@Ironheartbart]

My 335d m57 has 2 tubros, downpipe egr delete and has 800nm and 380hp, i did 4,2 to 100km/h

[@casar68]

My G31 M550d WITH EGR and catalytic downpipe BUT with an individual ECU program has 473hp and 850Nm. I hope I’m going over the 500hp barrier if I remove those “bad” components… 🫣

[@HEMIJackking]

Not meant for tuning. This engine meant to achieve the v8-v10 powerbands from the '90s and '00s with smaller displacement. The only reason this engine is complicated on this level because it was trying to survive the Euro 6d and in the meantime it became a ticking time bomb. At 10+ years old and over 200k miles these will be the most unreliable, most expensive things to own ever.

[@Scott-mv1fk]

I see no reason (or evidence!) why this engine should be more unreliable than any other BMW diesel engine. The 4 -turbo system is actually more stable, each turbo has less work to do than a single or bi-turbo setup.

[@Aivar_J]

I have both f10 with 280kW and g31 with 294kW. F10 very very good. G31 I like more, as it is very very very good. Both 7,3L/100km

[@Multiplads]

McChip tuned this engine to 515hp. There are two youtube videos, one of the 5 series and the other of the 7 series

[@spade6552]

what about the m57tutop

[@e46m54nissansr20937]

OMG they used Piezoelectric injectors again, like in my N54 335i.Have they not learned their lesson from the late mid 2000s. Interesting engine though im sure the torque is absolutely effortless.

[@javierjimenez3627]

I see this and I just imagine a new engine for the next m3/m4 platforms with 4 turbos and 900HP and 3 high pressure fuel pump

[@coolmusic1684]

Wat about relayebility

[@schof1014]

Everyone is talking about this thing ! Toss a giant single Turbo add more fuel and tune and you will have 500 hp with 700ftlbs of torque making all these big cars move beautifully

[@schof1014]

Pardon I small and One large turbo...

[@kywin4004]

Mercedes seems to have done better with a single turbo hybrid diesel from the cls450

[@pinkbono]

Sounds like highly expensive maintenance.

[@TacoDeliveryGuy]

G power numbers not including any deletes probably

[@maxxx5798]

tuners like g power or abt always keep their power outputs low for reliability. So normal Tuners push these engines to over 500hp with 1000nm of torque.

[@premiumxperiments6059]

Im patiently waiting for the n57 video😭😭😭. Heck you can do the predecessor of the b57s. The n57s plz😭

[@R3YNZ]

Is it more reliable than the m57?

[@TruePurpleHaze]

@@R3YNZ it has issues with broken oilpumps that lead to spun bearings and also suffers from (somewhat rare) timing chain failure. The N57 in the E9x 325d and 330d is the most reliable variant.

[@alexmair3613]

You would think with hydrogen on the brink of being introduced perhaps a separate tank of HHO gas could be injected into the fuel system of this power beast to make it comply with emissions. There are some papers showing hydrogen stratified with diesel fuel making for very minimal emissions.

[@farmerj06]

Im sorry, let me get this straight real quick: - 4 spooly bois - 41 mpg - Compact 3.0L - 400hp - 560lb-ft or torque - 4 spooly bois (have i said that already?) Why hasnt someone put this damn thing in a miata yet?

[@spacee3249]

Sir... That was 5 you put up there😂

[@MrWaheedulHaque]

can you not just swap the 4 small turbos out for 4 big turbos and see some hefty power and torque gains

[@hightiernub1313]

How would the reliability be? It would be a disaster to fix or maintain considering there's 4 turbos. It would be smarter to have what Audi has set up or better yet have 2 electric turbos instead of 4 in a sequential set up for more reliability and lesser complexity for maintainence. That way you have that instant torque without the need of more moving components which will increase the chances of a break down. They could've also done a single turbo and single auxiliary compressor like how Volvo does it or better yet just have the same twin turbo I6 in the 50i series and attach a electric compressor. No more turbo lag but good performance.

[@tturi2]

it's a bmw,

[@rickk7332]

Why 4 turbos instead of a supercharger?

[@WorldWideWebb98]

That is one complex feat of engineering