[ryem3]

I believe Sportauto the German magazine dyno'd their test car and the output was nearly 400hp, very close to their maximum 10% deviation for a test car.

[bradleyland]

Originally Posted by Artemis

During tests Akrapovič found out that the tested base M2 features 284.3 kW - 386.5 hp (DIN) at 5,500 rpm (instead of the official 370 hp (DIN)) and 558.8 Nm - 412.1 lb-ft of torque at 2,500 rpm (instead of the official 465+35 Nm (DIN)) (see here).

As Akrapovič officially claims those figures, for sure they can back these up with verifiable test results.

Hence, no dramatic hp increase is required to bump the M2 to 400hp (DIN) for a special version, officially quoting 385hp (DIN) or so.

However, there's a catch. BMW M already pushed the envelope of the N55 engine for the base M2. The margin that's left for a power bump is rather tight. Also DINAN came to that conclusion after testing the base M2 (see here) ("These specific parameters allow the car to safely extract as much power as possible out of the engine. On the M2 this task is especially daunting given how close to the edge of its capability the N55 and its turbo are tuned from the factory. BMW did not leave a lot on the table to work with in terms of additional power output as the turbos are taxed heavily out of the gate. In fact, in its stock configuration, the M2 is nearly the equivalent of a Dinan stage 3 tuned M235i (the stage just short of the big turbo and associated tuning).").

Originally Posted by auf Deutsch

Yet Dinan measured 360 hp, 5 less than what BMW claims. That's certainly not the norm. The other BMW engines, including the 35i N55, made more than advertised.

There are just too many variables to rely on dyno readings as gospel. Although the butt dyno never lies.

Are Akrapovic using a chassis dyno? Dinan uses two dyno types: wheel hub and bench. Dinan are one of the few shops that will actually pull a motor and run it on a bench dyno. Their wheel hub dyno is also far better than a roller based chassis dyno. In general, Dinan's tests are capable of load-based, steady-state measurement, which don't require as much correction as inertia dynos. They also eliminate traction and slip as confounding factors.

This is a really long way of saying that I'd trust Dinan's results over any inertia dyno, but 5 HP is still a small difference, so I don't think it has much impact on the underlying question: could the N55 be pushed to power levels required to remain competitive?

Whether the N55B30T0 makes 360 HP or 365 HP really doesn't make much of a difference. The question is more about what overhead is there, and we know that the tuning results for the M2 haven't been fantastic so far.

[bradleyland]

Originally Posted by blackholescion

This is misleading. The 450 is not stock, and they did it with an intake and meth. 380 at the wheels is stock with just a piggyback.

True, but 380 HP at the wheels is more than enough to remain competitive, and that's still using a piggyback (which isn't optimal).

Originally Posted by blackholescion

One thing I don't think anyone has mentioned. What happens to the N55B30T0 in the X4 M40i if they replace the motor entirely in the base M2 with an S55 versus doing a special edition M2 at a premium (implying extremely low numbers)?

This conversation has gone down a bit of a rabbit hole with all the speculation about the base M2

The most solid information we have is that the car in the video is some kind of special edition M2, and posts from SCOTT26 more or less confirm that some kind of special edition is coming. All the talk of the base car is just us sitting around gazing in to our navels With that out of the way!

I would expect the X4 M40i to get the same motor as the M240i (B58B30O0) at some point, regardless of what happens with the M2.

[blackholescion]

Originally Posted by bradleyland

This conversation has gone down a bit of a rabbit hole with all the speculation about the base M2

The most solid information we have is that the car in the video is some kind of special edition M2, and posts from SCOTT26 more or less confirm that some kind of special edition is coming. All the talk of the base car is just us sitting around gazing in to our navels With that out of the way!

I would expect the X4 M40i to get the same motor as the M240i (B58B30O0) at some point, regardless of what happens with the M2.

Totally agree regarding the special edition vs base car. My point was more that BMW developed this motor for 2 applications, and not just the one. All of the arguments for replacing with S55 don't take into account that the N55 would still be around in a different series car unless we hear otherwise.

[DomR]

I just read an article that is saying that the current M2 will end production in 2017 and the M2 CS maybe the successor.

I have a deposit on an 2017 M2 that should start production next spring. I hope they release details of this car soon as I will lose a lot of money if they change the M2 to this for 2018

[zenmaster]

Originally Posted by bradleyland

I really struggle with the idea of the S55 in the base M2 because of the threat it represents to the M4. The price point of the M2 is just too aggressive to bring over the S55, even if it's not just a straight cost of materials concern.

there will be no m4 threat because the m4 will be upgraded. The S55 would only be used in a more costly m2 so no threat there either.

[Bluenose-2er]

I think these S55 M2 threads are a way for people jealous of the those already driving around their M2s to let the air out of their tires a bit.

PS I heard it is also going to have carbon ceramic brakes, CF roof, unicorn hide seats and a flux capacitor ... all for the same price!!!

[oldmanstyle]

Originally Posted by stren

I don't believe the B58 is about to get dropped into the M2. M don't just pick up a new stock BMW engine and tune it without having some years of data on it.

I agree. BMW had this car's life cycle mapped out before it went on sale, and it makes no sense to tinker with the N55 if it's not going to last the entire run. If any changes were made to the engine, I think it would be the turbo as that is the simple upgrade path and has the supporting mods already in place with the N55T0 bottom end.

[PackPride85]

Originally Posted by oldmanstyle

I agree. BMW had this car's life cycle mapped out before it went on sale, and it makes no sense to tinker with the N55 if it's not going to last the entire run. If any changes were made to the engine, I think it would be the turbo as that is the simple upgrade path and has the supporting mods already in place with the N55T0 bottom end.

Bigger turbo will impact throttle response and increase lag on the N55. They were able to negate it on the B58 b/c its running air to water IC and higher comp. ratio.

[zenmaster]

Originally Posted by oldmanstyle

I agree. BMW had this car's life cycle mapped out before it went on sale, and it makes no sense to tinker with the N55 if it's not going to last the entire run. If any changes were made to the engine, I think it would be the turbo as that is the simple upgrade path and has the supporting mods already in place with the N55T0 bottom end.

Has BMW ever done this?

[oldmanstyle]

Originally Posted by PackPride85

Bigger turbo will impact throttle response and increase lag on the N55. They were able to negate it on the B58 b/c its running air to water IC and higher comp. ratio.

The B58 makes more sense than the S55, but I think going through the trouble to do an N55T0 makes it unlikely.

Originally Posted by zenmaster

Has BMW ever done this?

Not that know of, and I don't think it's particularly likely. Barring a limited edition model, IMO there's <1% chance the M2 sees anything but the N55T0.

[dasblack]

Originally Posted by Bluenose-1er

I think these S55 M2 threads are a way for people jealous of the those already driving around their M2s to let the air out of their tires a bit.

PS I heard it is also going to have carbon ceramic brakes, CF roof, unicorn hide seats and a flux capacitor ... all for the same price!!!

+1 on the flux capacitor

[Nine Lives]

Originally Posted by Bluenose-1er

I think these S55 M2 threads are a way for people jealous of the those already driving around their M2s to let the air out of their tires a bit.

PS I heard it is also going to have carbon ceramic brakes, CF roof, unicorn hide seats and a flux capacitor ... all for the same price!!!

Better throttle response with a fully charged twin flux capacitor though

[Robin_NL]

On German 1erforum.de I read something about N55 being dismissed since yesterday? (member Rob704)
I asked the question if this goes for all N55s or only N55 in M2...

Scroll down. Any German members care to elaborate?
http://www.1erforum.de/threads/s55-i...8#post-2573278

[bradleyland]

Originally Posted by Nine Lives

Better throttle response with a fully charged twin flux capacitor though

Only one downside: 88 MPH maximum velocity

[bim2er]

Originally Posted by Nine Lives

Better throttle response with a fully charged twin flux capacitor though

I thought the latest Mr. Coffee flux capacitor was a single twin-scroll rather than the dual flux models of the past. I was at Twin Pines Mall recently and overheard Doc Brown schooling Marty. Maybe they will go back to the dual flux model as I hear the twin scroll model is starving for air.

[arkow]

Is BMW trying to match the new Audi RS3 which is supposedly coming with 400HP?

[amdmaxx]

with HP? I hope so. Not supposedly - Audi RS3 was announced today..

with sedan and awd... not so much (not until 2019 grand coupe at least for 4 doors)

Originally Posted by arkow

Is BMW trying to match the new Audi RS3 which is supposedly coming with 400HP?

[MerlinPurple]

Originally Posted by arkow

Is BMW trying to match the new Audi RS3 which is supposedly coming with 400HP?

Who knows, but here's what was released today:

Specs at a glance:


Powerplant: latest 2.5-liter turbocharged five-cylinder engine, which debuted in the TT RS.

Output: 400 horsepower (294 kilowatts)

Peak torque: 354 pound-feet (480 Newton meters), available at engine speeds between 1,700 and 5,850 rpm.

0-60mph: 4.1 seconds

Notes: Audi says it will launch the model in the United States and China from summer 2017 under the Audi Sport label - nearly a year from now. No information regarding the European market is currently available.

[bradleyland]

Damn I love the sound of that I5. The warble reminds me of the VR6. Not exactly the same, of course, but I get all sentimental when I hear that Chewbacca growl sound coming from an engine.

[Tag]

It wasn't that long ago when everyone made fun Audi and MB while giving praise to BMW. Ohh how the tables have turned.

[Stu Pedasho]

Originally Posted by MerlinPurple

Who knows, but here's what was released today:

Notes: Audi says it will launch the model in the United States and China from summer 2017 under the Audi Sport label - nearly a year from now. No information regarding the European market is currently available.

It needs to be a coupe and that styling is boring. Just my two cents.