BMW N55 vs S55: Which One is Better?

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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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Dustrunnersauto

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.

BMWPOWER

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.

anderayson

I like how you used s58 animations haha

anthonyt

should talk about he m2 n55, its the most refined of the n55 versions,

and it is lighter than the s55

qnaB

Very good and informative video, cheers

danilorodriguez

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.

anthonydelatore

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. 👍

christopherblake

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

wesbuck

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

davidt.

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.

Wicked_RotF

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

the_little_car_project

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

efthimios

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).

klstrucker

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.

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