BMW N55 vs S55: Which One is Better?

The important changes between the N55 and S55 are the S55's closed deck block, stronger pistons, sodium filled exhaust valves, double-piston high pressure fuel pump, twin-turbo system compared to single turbo system, and revised intercooling system. As stated as the start of the video, the S55 uses 75% of the same parts as the N55, so they're very very similar.
The S55 basically just has a handful of modifications which allow it to reliably produce more power and be prepped for track use. As far as which one is better, I think it's pretty obvious what the answer to that question is. The S55 is just an upgraded N55, there's really no downsides to it.
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Fast road Vehicle Solutions - • MAKING A N55 M135i ENG...
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The Daily Driven - • Pure Stage 2 Turbo BMW...

[@Dustrunnersauto]

If you guys enjoyed the video, please SMASH THAT LIKE BUTTON. It helps the channel out a huge amount and helps KZbin put the video in front of more people. Thanks for watching 😬

[@channelgreen5949]

Which is more reliable long term???

[@1989BMWPOWER]

You should do an BMW 6 cylinder generations video. M30,M88,M20,M50,M52,M54,N52,N53,N54,N55,B58,S38,S50,S52,S54,S55,S58.These engines are the finest when it comes to straight sixes and there is plenty of technical stuff to discuss.Waiting for your next video.Continue the great work.

[@anderayson5597]

Nice explanation video. What I am missing here is the special N55 version in the F87 M2 pre Comp which uses parts from the S55 such as crankshaft, pistons, oil pump etc.

[@conte4967]

where did you hear about this? i'm trying to figure out if base m2 is still a good buy

[@Maqqzy]

@@conte4967 I went for the OG M2 and I can tell you that its the more fun car. M2c is faster yes but the OG M2 is more fun when you buy a manual

[@anthonyt4981]

I like how you used s58 animations haha

[@mitchdaytonam3]

Some of the animations were 4 cylinders as well. 🤣

[@qna95B]

should talk about he m2 n55, its the most refined of the n55 versions, and it is lighter than the s55

[@bella_testastretta]

whats the difference between the N55 in M2 and M235i?

[@4MyTube4Ever]

@@bella_testastretta forged parts,and other stuff was also upgraded so it has healthy 370+hp.. ;)

[@bobbybooshay5854]

Is the n55 in the m2 reliable? Does it have any inherent issues?

[@gedam131]

@@bobbybooshay5854 very reliable, boostpipe is only big issue to fail. Fuel pump isn’t the best aswell as the intercooler which is too small for track. Overal it’s a solid engine. Do remember the N55 found in the M2 has the M4 pistons aswell.

[@fnafplayer6447]

It doesn't have closed deck

[@danilorodriguez4665]

Very good and informative video, cheers

[@Top_g80comp]

Fantastic video as usual 💯🤘🏻

[@anthonydelatore9477]

BMW used true twin set up on the S55 bc it moves more air and can keep power and torque higher in the RPM range bc of it. Twinscrolls are more efficient, effective, and have way better throttle response, nd spool up. Twinscrolls tend to fall off in the higher rpm unless it is a larger twinscroll turbo like the one on the B58, which is why stock turbo B58s can make impressive numbers. A lot of single turbo kits like CES and couple other companies put a single twinscroll turbo on the N54.

[@justawhitenigga]

Both are good engines!

[@NoCompM2]

Very well explained. Thank you

[@christopherblake6695]

Hey dust runners, can you do a video on the EJ20 vs the EJ25. For example their different head configurations, sti, AVCS etc. and all the aftermarket variables in between. 2.1, 2.3, 2.7 etc etc.. would love it cheers. 👍

[@philamor5139]

great vid man

[@vrtuned4246]

Video was amazing!

[@davidt.6415]

Wonderful episode! You should do an episode on the m60/62 family and the s62

[@reuelmundie1062]

Please do the N55 vs B58

[@Wicked_RotF30]

N55 is just as good and sound better. B58 is overrated.

[@huntergardlin8137]

@@Wicked_RotF30 why do you say that? The b58 is a great engine too. Much better platform for tuning I think

[@Aaron-ge8sf]

@@huntergardlin8137 b58 is less rare

[@Wicked_RotF30]

@@huntergardlin8137 some tuning companies beg to differ😏

[@huntergardlin8137]

@@Wicked_RotF30 who? Lol

[@BCG415]

So you can’t use a mechanical water pump on an N55 due to the cooling ducts on the crankcase?

[@wesbuck339]

Great Video! Would really like to more content on the M2C and the drivetrains. Not many channels are doing it.

[@klstrucker930419]

Is there any data comparing weight of the S55 including all auxiliaries (turbos, intercooling) to N55? M2Comp is heavier than the regular one, but some of the difference is down to particle filter (at least in europe).

[@s11smk87]

Will the S55 parts fit on to the N55?

[@efthimios]

As a 2011 335 xdrive msport owner have 75k miles and very happy

[@the_little_car_project]

Can you make a new one comparing the S55 with the S58?

[@hillarytshabalala8354]

Does the s55 engine fit in a 320 f30 ?

[@gtiguy727]

No info on the crankshaft and rods??? Forged??

[@enochzheng8372]

is forged better than casted?

[@user-eo6mw5jn1z]

please do an episode of Mercedes m177(ls1,ls2)and m178.

[@TheFlaco1978]

Are the engine mounts the same?

[@Wicked_RotF30]

However, if you added most of the upgrades from the s55 to the n55, it would make plenty of power and likely will do it reliably.

[@diditiu3988]

Hi there nice vid by the way. I just want to ask and since I have a 2021 M2 competition, I decided to change the downpipes, the pipes going towards the back is from eisennman race with no exhaust just a straight pipe with no blockage whatsoever, then I change charge pipes, the crank hub and have the ECU tuned, thats it. Now my question is do I need to change my OEM intercooler to a CSF or any aftermarket dual pass charge air cooler? and I dont track this car but just drive it daily and drive it spiritedly and fast. Hope to hear from you the soonest. Reply

[@cgberz]

Can we get a US S52, M54, N52 comparison video? Three-ish different gens...

[@garymurphy5133]

Is the N55 the only engine fitted in the m2? also does this suffer from rod bearing issues like many other M models

[@billymania11]

No, it has S55 bearings. It's not well known but it has iron liners as well. Its a track version of the N55. (I have one.)

[@juliogonzalez7500]

Any one knows of any honest mechanic shop in the Goodyear AZ are where I can take my BMW

[@christopherroper9566]

S55 FTW!

[@nate9114]

there are multiple variants of both engines too.

[@fnafplayer6447]

IK there is the f87 but what else of s55 varieties are there

[@PointShiftDrive]

im surprised you didnt mention the crank hub issues of the S55. I have a M2C and I know this is its Achilles heel

[@richinfeels]

Ive heard about that, do you think youll be ok if youre aware not to downshift to hard or too early?

[@mushy1983123]

@@richinfeels hard to say most people's hub spins due to down shift I've heard afew spin from 1st to 2nd gear shifts... I've just ordered a crank hub bolt capture kit just incase hub spins I'd rather have timing out rather then need a new engine eventually ill get crankhub upgrade

[@t.c904]

Nothing about that. For sure the S55 is the stronger engine. But I think the N55 is more reliable. My 135i Stage 2 N55 2011 has no issue the last 50tkm.

[@Saiyan585]

Easy fix.

[@noahsantourian214]

I have my crank hub upgraded so not an issue for me… if you’re committed and have the money than the s55 is the way to go.

[@yachtkuza]

Any chance on reviewing the M113 and M113K?

[@amropanmotorsport6417]

Could you do a S62 vs S65?

[@Dustrunnersauto]

Definitely!

[@IPL_VIC]

S55 vs b58 please

[@richiesworld1]

Man didn't mention the almighty Barra once, in that intro. 😡🤬

[@tedmalmgren3464]

I got both There’s very big differences in how the engine sounds and behave

[@jt7937]

What's your view on either motor and do you have a preference? Also what models are they in?

[@tedmalmgren3464]

@@jt7937 I bought my M4 ‘15 in October. Before that I had the 435i with M performance power and sound kit 340hp (in Europe) The 435 was amazingly fast and it felt like it had more power than it had. The M4 has a shit load of torque, and it sounds more like a deep sound. Many don’t like that sound, but I love it. You don’t have to rave the engine so much it just hit of from low numbers.

[@Anthony-qh1xv]

Which is better? which is more reliable? Thank you!!

[@tedmalmgren3464]

@@Anthony-qh1xv N55 is more simple, with fewer parts and less hp. But S55 is not overheating when on track. So I’d say N55 if you don’t race your car and S55 if you do.

[@Anthony-qh1xv]

@@tedmalmgren3464 Well, That really works out, because I have an N55B30M0 in my F26 X4. Thank you! Also, if that M4 is yours in the picture, it is really beautiful! The M4 is my dream car! I love the sound of the S55. How does it feel to drive?

[@Steven-xj2rf]

The problem with the E90 M3 was the E90 with N54 could easily make more power cheaper. They corrected it with the F80.

[@RandomGuy-ej9gr]

Yeah but the sound alone of that v8 in the m3 made up for it

[@DriftKr6l]

You did leave out a pretty major difference, S55s crank hub issues which the N55 had non of

[@CaptainCarling]

You mean the issue that happens to around 1 in every 10000 cars lol

[@VictorEstrada]

N55 does have that issue, but you only see it on high power

[@UltimateBimmerSVC]

Production costs would be the best guess here for the N55 having a single turbo.

[@anthonydelatore9477]

BMW used true twin set up on the S55 bc it moves more air and can keep power and torque higher in the RPM range bc of it. Twinscrolls are more efficient, effective, and have way better throttle response, nd spool up. Twinscrolls tend to fall off in the higher rpm unless it is a larger twinscroll turbo like the one on the B58, which is why stock turbo B58s can make impressive numbers. A lot of single turbo kits like CES and couple other companies put a single twinscroll turbo on the N54.

[@mk23mod08]

Does the 2016-2017 N55 M2 engine have forged internals?

[@danielsantiago9142]

Yes it does

[@CaptainCarling]

Another vid I watched says the n55 has a forged crank and rods but not pistons, where the s55 has all three

[@Mursounderground]

@mk23mod0 the N55 shares 75% similarities with the s55 engine, the N55 has forged crankshaft and rods. It has cast pistons but uprated stronger ones. It is a good engine and reliable. The s55 on the other hand is the engine to have.

[@Mursounderground]

@@CaptainCarling the S55 hasn’t got forged pistons, just stronger cat iron pistons. Forged crank and rods yes.

[@paulmeduri4451]

Bmw m2 n55 and s55 have same pistons and forged

[@PerfectRotation]

I don't think you can compare the motors without mentioning the S55's crank hub issue. It's a pretty big problem with the motor.

[@CaptainCarling]

No it isn't, it's a problem that happens to very few and has been blown out of proportion

[@PerfectRotation]

@@CaptainCarling I know 5 cars that have had crank failures. That's a lot

[@CaptainCarling]

@@PerfectRotation 5? Wow that is a lot 😂

[@bobbybooshay5854]

@@PerfectRotation were they stock or modded?

[@gord6695]

@@PerfectRotation totally made that number up. Stock. They have 0 problems

[@bg-se7rq]

🍎 🍊.. s55 v s58 plz

[@romeo00132008]

Injector cooling. … I have it on my semi tractor with ISX 15.. this truck is from 2012… so technology does exist. And honestly this tech caused more trouble then good on my engine…

[@fishymk7558]

You also forgot to mention that the M2 N55 has the rods and pistons from the S55

[@MrBonderd]

It just has the pistons. The rods and crank are m235i internals. Those were forged

[@fishymk7558]

@@MrBonderd you’re right the m2 n55 has the s55 crank bearing, s55 pistons and s55 oil sump.

[@GodKing804]

S55 Using 2 HPFP one the cams turns out why they are likely to spin their hub vs an n55 Major drawback

[@HOTPLATEGAMING]

B58 HOLD MY BEER

[@rayland9305]

All the youtubers with B58's say no.... they're all hype. Rip: Kies 340 times 2, Nocluthgarage, Thicwhips, 1stockf30...

[@gord6695]

S55 stock for stock is better. S55 vs b58 stage 1 is better by a long shot. S55 vs b58 is better by a long shot. A s55 on stock internals with bigger turbos can hold 800 bhp on stock internals. RIP b58 poor mans s58 lol

[@noahsantourian214]

@@gord6695this man is spitting facts…

[@RTXRetroGo]

The N54 is best and you know it

[@cassianobispo9431]

B48 is a 4 cylinder engine sir 🤔

[@f87]

Didn’t watch this but assume that N55 Apex is better all around engine.

[@brightmdrum9561]

B, 48 it's a 4 cylinder

[@MrMightyZ]

If you have a very big, heavy boat with a powerful winch you will want to use whichever motor is heaviest. If your boat is smaller and has a smaller, less powerful winch then the lighter motor will make the better anchor. Both are good boat anchors though.

[@ChristopherGuilday]

Bro these are cars, not boats. Wrong video. This ain’t your dad’s challenger.

[@MrMightyZ]

@@ChristopherGuilday Dude my "funny joke" is that they're both only good as anchors.

[@rosun_official]

He meant the B58* not the B48

[@seeitfrommyhouse5816]

1.) 2002 Turbo , 2.) m102, 3.) m106 (745i turbo) 4.) n54, is the fourth mass produced turbo BMW

[@Dustrunnersauto]

Those engines weren’t mass produced.

[@KimboDogg07]

I can’t believe you didn’t speak anything on the DCT …

[@whakatane7339]

I can’t believe u did not see the title. Is that the transmission discussing here?

[@KimboDogg07]

@@whakatane7339 dude you can’t talk about the S55 and N55 engine with discussion the dual clutch transmission on the S55, it’s a key part to car… Stop being a angry troll cause I made a simple observation comment…

[@toomuchsauce4442]

The b48 ? You mean 58 the 48 is garbage

[@joshdominguez341]

They knew a twin turbo set up better

[@lutfullahkarahanl2998]

Its called singel twin scroll turbo, basically a twin turbo in a turbo 🤷🏻‍♂️

[@bobbybooshay5854]

That's totally incorrect

[@anthonyb2990]

S55 only produces 30 more hp over the M2 N55.. the better street car (99% of buyers) is obvious

[@jimcockburn4652]

1,000gm = 1kg

[@ethersecure2432]

So same engine, same shitty reliability? Lol

[@carboydorifutoparty3976]

Some similarities here and there but no. S55 is closed deck with twin turbos and some other parts while the N55 is open and is single turbo. There are other differences but the S55 is looking alot more reliable than the N55 is.

[@qna95B]

@carboy wrong and wrong, there is a word that s55 ppl rather not talk about crankhub and n55 has proven to be wayy more reliable than s55, (its a bit of glass cannon)

[@n.prince2458]

Not true. The N55 M engine is currently, the most reliable modern BMW engine. Never had one engine issue to date.

[@sirwilliam0722]

@@carboydorifutoparty3976 close/open deck makes much less difference than you think in term of ‘reliability’. Unless you are looking over 700whp.

[@CaptainCarling]

I'll take the stronger block all day ;-)