[paradoxical3]

Not sure if this means anything or not, but I'm bored so what the heck. Was watching this BMW M2 Coupe Technical Animations Powertrain Video:

Beginning around 58 seconds they have a view of the turbo. Interesting enough, they took the time to actually render a part number on the turbo. It's the only part in the video in which they did that on. Best as I can make out it reads:

18621015007 A M
B2 1
12/10

Then on the engraved blue sticker, it reads:

18621015064


The M235i part number is 11657643115

Who knows if it means anything, but is it possible the M after the part number indicates a M specific turbo? Anyone have pics of the S55 turbos to see if that is on there as well?

I am still guessing it will be the same/similar turbo to the M235i, but it is interesting to me they chose to render the part number. Easter egg? Here's to hoping!

[paradoxical3]

For reference, I had a 2014 X1 35i N55 and the turbo part number engraved on the borg warner turbo was 18621015060a. That was a pneumatic wastegate, for what it's worth.

[Thurman Murch]

It's the same turbo as M235i

M2 has better integrated turbo into ex manifold for rapid warm up, top piston ring from M3, same spark plugs, bigger injectors, forged steel crank, same bearings as M3, same but single air intake like M3 with m sport hole at bottom of air box

The B series version would use:

11658637041

[paradoxical3]

Originally Posted by Thurman Murch

It's the same turbo as M235i

M2 has better integrated turbo into ex manifold for rapid warm up, top piston ring from M3, same spark plugs, bigger injectors, forged steel crank, same bearings as M3, same but single air intake like M3 with m sport hole at bottom of air box

The B series version would use:

11658637041

That's my assumption but has it been confirmed anywhere?

[zenmaster]

Originally Posted by Thurman Murch

It's the same turbo as M235i

Based on what reference?

[filet.M2c]

I have not seen any official info stating whether or not it is the same turbo as the M235i, but I sure as hell hope it is upgraded!

[dammitcubs]

I'm curious - we have this debate about what turbos are in the M235i vs M2.

My question is - is M235i also running a twin scroll vs twin turbo?

[chris719]

Given the peak power numbers, it is probably the same turbo. M235i does use a twin-scroll as do all N55s.

[kovsky]

Originally Posted by chris719

Given the peak power numbers, it is probably the same turbo. M235i does use a twin-scroll as do all N55s.

It just does not seem logical it's the same turbo. A stage one tune on the 235i typically yields only about 40hp so right at what the M2 is rated at stock. So right from the factory it's basically maxed out?? It has bigger injectors but that is not needed if it's the same turbo and capacity.. Likely the turbine or compressor or at least slightly upgraded. Maybe I'm just overly optimistic.

[PackPride85]

Just because it has a different part number doesn't mean its different. Many parts get revised slightly or switch manufacturers mid model year and get a part number update.

[SliChillax]

Originally Posted by dammitcubs

I'm curious - we have this debate about what turbos are in the M235i vs M2.

My question is - is M235i also running a twin scroll vs twin turbo?

It's quite well documented that the M235i uses a single twin scroll turbo.

[FSociety]

Cant wait till tuners still poking these and we really find out what its capable of.

[M3 Adjuster]

Originally Posted by paradoxical3

Not sure if this means anything or not, but I'm bored so what the heck. Was watching this BMW M2 Coupe Technical Animations Powertrain Video:

Beginning around 58 seconds they have a view of the turbo. Interesting enough, they took the time to actually render a part number on the turbo. It's the only part in the video in which they did that on. Best as I can make out it reads:

18621015007 A M
B2 1
12/10

Then on the engraved blue sticker, it reads:

18621015064


The M235i part number is 11657643115

Who knows if it means anything, but is it possible the M after the part number indicates a M specific turbo? Anyone have pics of the S55 turbos to see if that is on there as well?

I am still guessing it will be the same/similar turbo to the M235i, but it is interesting to me they chose to render the part number. Easter egg? Here's to hoping!

That's a Badass video... Nice find !

[filet.M2c]

I haven't had a chance to read every review. Has a single reporter even investigated this? This is a pretty important component for me and it seems odd so many people aren't interested

[PrematureApex]

Originally Posted by synergist

I haven't had a chance to read every review. Has a single reporter even investigated this? This is a pretty important component for me and it seems odd so many people aren't interested

It is extremely odd isn't it? That's like, question #1.

Given that BMW has taken the time to make press releases noting all of the engine differences (new block, pistons, etc.), and hasn't noted a larger turbo ...I'd say that's at least some evidence of it being the same.

No worries, a Pure Stage 2 may very well bolt right up.

[zenmaster]

Motortrend already said the M2 uses an M235i turbo.

[kovsky]

Originally Posted by zenmaster

Motortrend already said the M2 uses an M235i turbo.

Originally Posted by motortrend

There are, however, big differences under the hood. Rather than fitting the M3/M4’s twin-turbo S55 straight-six, BMW kept the single-turbo N55 from the M235i, but fitted it with pistons from the S55. These two BMW 3.0-liter straight-sixes share bore (84.0mm), stroke (89.6mm), and compression ratios (10.2:1) but that’s it.

The context is important. They did not say it's the same turbo, they said it's a single turbo design not a twin turbo design. Everyone knows now the motor in the m2 is not the same one from the 235i there are many enhancements... Unless you think it's literally the same N55 from the 235i zen you can't read what motortrend said and believe they said it's the same turbo.

[zenmaster]

Yep, they indeed could simply be referring to the same type of turbo as is used in the M235i (and all other contemporary non-M, turbo BMWs).

[filet.M2c]

Well here's to more ambiguity . Hopefully we get some confirmation on this soon.

[chaddy74]

Looks like the same turbo then?

Originally Posted by PrematureApex

It is extremely odd isn't it? That's like, question #1.

Given that BMW has taken the time to make press releases noting all of the engine differences (new block, pistons, etc.), and hasn't noted a larger turbo ...I'd say that's at least some evidence of it being the same.

No worries, a Pure Stage 2 may very well bolt right up.

[Thurman Murch]

There was a German part supplier site saying that 11657643115 was the turbo lader for the M2 and X4 M40i but it has curiously disappeared

It could be same turbo housing/part number with different revision... Internals may be upgraded/better

There's that video of the dude in his tuned 1M and he couldn't catch up to the M2 even tho the M2 was a proto... Maybe the proto had the upgraded S55 in it for th CSL

Maybe the B engine will be avail with the LCI

If you like the 228 and love the M235i you will got to have the M2 until something more bodacious comes out

[zenmaster]

Originally Posted by Thurman Murch

There was a German part supplier site saying that 11657643115 was the turbo lader for the M2 and X4 M40i

According to http://de.bmwfans.info/parts-catalog/11657643115/ it's the same turbo used all N55 engines since Oct 2013: M135i, M135Ix, M235i, M235iX, AH3, 335i, 335iX, 335Li, 435i, 435iX, 535i, 535iX, 535Li, 640i, 640iX, X3 35iX, X4 35iX, X4 M40iX, X5 35i, X5 35iX, X6 35i, and X6 35iX.
The M2 is missing, but X4 M40iX is there.