N55 vs S55

DrKevM5 · 12-03-2022, 02:33 PM

That pesky S55 crank hub though…

captain slowly · 12-03-2022, 02:47 PM

Quote:

Originally Posted by DrKevM5

That pesky S55 crank hub though…

Same as the one in the mighty N55

Wouldn't be a BMW if it didn't have at least one fatal flaw

m2ss · 12-03-2022, 03:06 PM

Quote:

Originally Posted by captain slowly

I doubt it. A stock M2C puts down 405-410 to the rear wheels.

Really? So you're saying stock it puts out about 450 at the crank?

I guess BMW really likes understating their power numbers...

captain slowly · 12-03-2022, 03:27 PM

Quote:

Originally Posted by m2ss

Really? So you're saying stock it puts out about 450 at the crank?

I guess BMW really likes understating their power numbers...

Thats what I was told at RK tunes who swapped the DME for me, and it makes sense since mine put down 486 rwhp with just a tune and nothing else

DrKevM5 · 12-03-2022, 03:32 PM

Quote:

Originally Posted by captain slowly

Quote:

Originally Posted by m2ss

Really? So you're saying stock it puts out about 450 at the crank?

I guess BMW really likes understating their power numbers...

Thats what I was told at RK tunes who swapped the DME for me, and it makes sense since mine put down 486 rwhp with just a tune and nothing else

At the crank?!! Wow. Did they ever lie to you. Explains a lot.

captain slowly · 12-03-2022, 03:34 PM

Quote:

Originally Posted by DrKevM5

At the crank?!! Wow. Did they ever lie to you. Explains a lot.

please do tell how I was lied to, considering what mine makes. Did you not see my dyno graph? And I'm talking at the wheels, not the crank.

Here is another forum members comp. Around 410rwhp is about right https://f87.bimmerpost.com/forums/sh....php?t=1621388

chris719 · 12-03-2022, 05:02 PM

Quote:

Originally Posted by m2ss

Really? So you're saying stock it puts out about 450 at the crank?

I guess BMW really likes understating their power numbers...

You might be new to the platforms but F80 M3 ZCP will do about 430-440 on a Dynojet. Remove 40 from this and you will get an M2C. The stock M2C dynos I have seen put it around 380 to 410 on DynoJets. There will always be differences between dynos, operators, and conditions so the absolute numbers are not that reliable.

RideM · 12-03-2022, 05:02 PM

A M2CS and OG m2 were dyno'd back to back on the same day. The S55 (m2cs) puts out 448hp at the wheels, the N55 puts out 386hp at the wheels.

Video available on YouTube.

///M TOWN · 12-03-2022, 05:52 PM

Quote:

Originally Posted by RideM

A M2CS and OG m2 were dyno'd back to back on the same day. The S55 (m2cs) puts out 448hp at the wheels, the N55 puts out 386hp at the wheels.

Video available on YouTube.

That's truly awesome ‼️

m2ss · 12-03-2022, 05:58 PM

Quote:

Originally Posted by chris719

You might be new to the platforms but F80 M3 ZCP will do about 430-440 on a Dynojet. Remove 40 from this and you will get an M2C. The stock M2C dynos I have seen put it around 380 to 410 on DynoJets. There will always be differences between dynos, operators, and conditions so the absolute numbers are not that reliable.

Huh, even at 380whp that's impressive.

DanG · 12-03-2022, 06:34 PM

Hmm. Just remembering that not all BMWs with S engines are labeled by BMW as M cars. The perfect example was the Z8 with the E39 M5 engine.

And BMW decides what is an M car not the S designation of the engine.

DFW_M · 12-03-2022, 10:22 PM

Quote:

Originally Posted by GoneIn4Secs

You sound hurt, cant understand why everyone doesnt fawn all over your S code engine

I've seen M2C drive through the middle of the street, no one bats an eye, wouldn't even notice it's there. My OG drives through, everyone heads turn and is like wtf is that!?! Meanwhile youre running around with the spec sheet like "look!! It has the S code engine and proper side mirrors!!!"

And seats, and brakes and…
Yes, the N55 is not an M engine. There is a reason for it

Why do you want people to turn heads after your car vs regular M2C? Why do you wish your car would be so special?

DFW_M · 12-03-2022, 10:26 PM

Quote:

Originally Posted by DanG

Hmm. Just remembering that not all BMWs with S engines are labeled by BMW as M cars. The perfect example was the Z8 with the E39 M5 engine.

And BMW decides what is an M car not the S designation of the engine.

Can you give us another example please

RugbyBro · 12-03-2022, 11:23 PM

Quote:

Originally Posted by DFW_M2C

Can you give us another example please

Not very available but the current Alpina models have S engines

GoneIn4Secs · 12-03-2022, 11:37 PM

Quote:

Originally Posted by DFW_M2C

And seats, and brakes and…
Yes, the N55 is not an M engine. There is a reason for it

Why do you want people to turn heads after your car vs regular M2C? Why do you wish your car would be so special?

You sound like you have a reading/comprehension problem

Robin_NL · 12-04-2022, 03:19 AM

Best.Thread.Ever.

N55 sounded so good with the M-Perf exhaust (I had an OG from 6-2016 to 10-2018)
S55 in M2C felt a bit restricted stock. Just bit faster beyond 60mph/100kmh, nice redline @7500/7600(?)

I had some heat soak issues on the German Autobahn with my OG M2( >30 degrees Celsius so that's pretty hot) and the car wouldn't go faster than 140mph ish and went in limp mode. Restarting it and everything was fine.
But anyway. Not too much headroom for hp/Nm improvement if you don't want to spend a lot of money...

I just think the S55 is a better engineered engine in many ways and it shows. It's easily tunable to '100HP more' which I did. No heat issues when on track. Only the brakes...off course...

They're both great cars

Cheers
Robin

m2ss · 12-04-2022, 06:27 AM

Quote:

Originally Posted by GoneIn4Secs

I've seen M2C drive through the middle of the street, no one bats an eye, wouldn't even notice it's there. My OG drives through, everyone heads turn and is like wtf is that!?!

Why is that, the sound or the look?

m2ss · 12-04-2022, 06:29 AM

Quote:

Originally Posted by DanG

And BMW decides what is an M car not the S designation of the engine.

Should have never sold my 1M...

DFW_M · 12-04-2022, 08:17 AM

Quote:

Originally Posted by m2ss

Why is that, the sound or the look?

Because he WISHES that were the case...and in his head it is...
In reality...it is quite different...

DFW_M · 12-04-2022, 08:18 AM

Quote:

Originally Posted by GoneIn4Secs

You sound like you have a reading/comprehension problem

I don't but go ahead answer and to the other guy also wondering about your fantasies...

///M TOWN · 12-04-2022, 09:45 AM

Quote:

Originally Posted by m2ss

Quote:

Originally Posted by GoneIn4Secs

I've seen M2C drive through the middle of the street, no one bats an eye, wouldn't even notice it's there. My OG drives through, everyone heads turn and is like wtf is that!?!

Why is that, the sound or the look?

Sound without a doubt

Moloc · 12-04-2022, 10:49 AM

Plot twist...most people will not be able to tell the difference between an OG M2 and an M2C just by looking at it. They will be able to hear the difference though. That's what it really comes down to, the sound.

12-03-2022, 02:33 PM	#67
DrKevM5 Colonel 2274 Rep 2,523 Posts Drives: G05 X5, F87 M2 Join Date: Aug 2008 Location: Western NY iTrader: (7)	That pesky S55 crank hub though… __________________ ?16 M2 Long Beach Blue/Black, 6MT '22 X5 4.0 M Sport Black Sapphire/Tartufo ?22 Tesla Model Y Performance Midnight Silver/White
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12-03-2022, 05:02 PM	#74
RideM Private First Class 317 Rep 175 Posts Drives: BMW Join Date: Aug 2020 Location: Canada iTrader: (0)	A M2CS and OG m2 were dyno'd back to back on the same day. The S55 (m2cs) puts out 448hp at the wheels, the N55 puts out 386hp at the wheels. Video available on YouTube.
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12-03-2022, 06:34 PM	#77
DanG Major General 10661 Rep 6,937 Posts Drives: 2018 M2 AW DCT Join Date: Aug 2012 Location: Seattle, WA iTrader: (1) Garage List 2018 BMW M2 [7.68]	Hmm. Just remembering that not all BMWs with S engines are labeled by BMW as M cars. The perfect example was the Z8 with the E39 M5 engine. And BMW decides what is an M car not the S designation of the engine. __________________ BMWCCA member Puget Sound Chapter
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12-04-2022, 03:19 AM	#82
Robin_NL S0THPAW 8717 Rep 7,846 Posts Drives: HS M2 Competition Join Date: Apr 2005 Location: The Netherlands iTrader: (0)	Best.Thread.Ever. N55 sounded so good with the M-Perf exhaust (I had an OG from 6-2016 to 10-2018) S55 in M2C felt a bit restricted stock. Just bit faster beyond 60mph/100kmh, nice redline @7500/7600(?) I had some heat soak issues on the German Autobahn with my OG M2( >30 degrees Celsius so that's pretty hot) and the car wouldn't go faster than 140mph ish and went in limp mode. Restarting it and everything was fine. But anyway. Not too much headroom for hp/Nm improvement if you don't want to spend a lot of money... I just think the S55 is a better engineered engine in many ways and it shows. It's easily tunable to '100HP more' which I did. No heat issues when on track. Only the brakes...off course... They're both great cars Cheers Robin
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12-04-2022, 10:49 AM	#88
Moloc Enlisted Member 80 Rep 45 Posts Drives: BMW M2 Join Date: May 2022 Location: Ontario iTrader: (0)	Plot twist...most people will not be able to tell the difference between an OG M2 and an M2C just by looking at it. They will be able to hear the difference though. That's what it really comes down to, the sound.
	Appreciate 1 ///M TOWN16539.00 Quote