Revised piston rings on 1M

MDORPHN · 06-01-2011, 09:43 AM

Any informed speculation as to why the N54 in the 1M is using revised piston rings? Might it be to reduce blow-by (and the resultant build up of gunk on the intake valves)?

Also, are the revised rings also being fit in the N54s being installed in the 335is and Z4?

Neil

werke-t · 06-01-2011, 10:55 AM

+1 would also like to know the changes and their purposes on the 1m, then if we can use them on our non-equiped n54's?

-Travis

dzenno · 06-01-2011, 11:03 AM

interesting if true...are part numbers different? If not they can't be different...

I also "heard" a rumor that the 1M turbos have "BorgWarner" printed on them when they went for European Delivery a few weeks ago to pick their 1M up...they saw the turbos in the glass display in the showroom with all the other displays showcasing the engine internals/components...

someone needs to do a bit of research on the 1M version of the N54, at least snap a few closeup pics of the turbos to see if they're different or if they have this BorgWarner stamp on them..

IancoleTX · 06-01-2011, 12:13 PM

how would changing the piston rings affect the amount of gunk building up on the intake valves?

stealth-twntrbo · 06-01-2011, 12:18 PM

Changing the rings wouldn't reduce carbon build up on the valves.

Forcefed3 · 06-01-2011, 12:19 PM

Quote:

Originally Posted by dzenno

interesting if true...are part numbers different? If not they can't be different...

I also "heard" a rumor that the 1M turbos have "BorgWarner" printed on them when they went for European Delivery a few weeks ago to pick their 1M up...they saw the turbos in the glass display in the showroom with all the other displays showcasing the engine internals/components...

someone needs to do a bit of research on the 1M version of the N54, at least snap a few closeup pics of the turbos to see if they're different or if they have this BorgWarner stamp on them..

boostd92 · 06-01-2011, 12:23 PM

^ Probably not practically, but theoretically if the rings seal better, there would be less blow-by. Blow-by is basically unburned fuel, carbon, etc getting past the rings into the crank case. The crankcase separator takes this pressure and (after separating oil from the vapor), introduces this charge back into the intake, potentially carbonning up the intake valves with gunk.

I highly doubt the difference in ring seal would be enough to see a measurable result. Not to mention the N54 is anything but "loose"... as a fairly high compression FI motor..

McMuffin · 06-01-2011, 12:23 PM

Quote:

Originally Posted by dzenno

interesting if true...are part numbers different? If not they can't be different...

I also "heard" a rumor that the 1M turbos have "BorgWarner" printed on them when they went for European Delivery a few weeks ago to pick their 1M up...they saw the turbos in the glass display in the showroom with all the other displays showcasing the engine internals/components...

someone needs to do a bit of research on the 1M version of the N54, at least snap a few closeup pics of the turbos to see if they're different or if they have this BorgWarner stamp on them..

This might be true since the 1M dynoed higher than a non M N54 at same boost levels.

Forcefed3 · 06-01-2011, 12:25 PM

If the turbos are indeed different, I am sure a swap would cost more than just getting RB's.

zeenon53 · 06-01-2011, 12:30 PM

Quote:

Originally Posted by gbreeE90

If the turbos are indeed different, I am sure a swap would cost more than just getting RB's.

QFT

jpsimon · 06-01-2011, 12:39 PM

Quote:

Originally Posted by McMuffin

This might be true since the 1M dynoed higher than a non M N54 at same boost levels.

indeed

Alpina_B3_Lux · 06-01-2011, 12:44 PM

I'd be surprised if they used different turbos. For 340hp that wouldn't be necessary at all, and the 1M had quite a limited development budget.

But let's see!

Alpina_B3_Lux

Doug007 · 06-01-2011, 12:48 PM

Quote:

Originally Posted by jpsimon

indeed

Umm, that's not the same boost.

Don't forget the 1M has the "overboost" function that increases boost beyond what a stock 135i runs.

968tomr · 06-01-2011, 12:56 PM

Piston Rings:

For the M Coupe - 11257610297
http://realoem.com/bmw/showparts.do?...86&hg=11&fg=20
For my 07 335i Coupe - 11257570405
http://realoem.com/bmw/showparts.do?...86&hg=11&fg=20
For a 2010 e92 pre LCI 11257610297 (Same as N54 1M Coupe)
http://realoem.com/bmw/showparts.do?...86&hg=11&fg=20

Doesn't seem like this part changed just for the 1M Coupe

Part number for the 2010 E92 N54 Turbo - 11657593015
Part number for the 1M Coupe N54 Turbo - 11657593015

-Tom

06-01-2011, 09:43 AM	#1
MDORPHN Colonel 297 Rep 2,898 Posts Drives: AW 1M Join Date: Oct 2010 Location: Wash, DC iTrader: (0)	Revised piston rings on 1M Any informed speculation as to why the N54 in the 1M is using revised piston rings? Might it be to reduce blow-by (and the resultant build up of gunk on the intake valves)? Also, are the revised rings also being fit in the N54s being installed in the 335is and Z4? Neil
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06-01-2011, 10:55 AM	#2
werke-t Captain 51 Rep 731 Posts Drives: 2020 X3M Competition Join Date: Apr 2009 Location: Sarasota, FL iTrader: (5)	+1 would also like to know the changes and their purposes on the 1m, then if we can use them on our non-equiped n54's? -Travis
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06-01-2011, 11:03 AM	#3
dzenno Banned 286 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	interesting if true...are part numbers different? If not they can't be different... I also "heard" a rumor that the 1M turbos have "BorgWarner" printed on them when they went for European Delivery a few weeks ago to pick their 1M up...they saw the turbos in the glass display in the showroom with all the other displays showcasing the engine internals/components... someone needs to do a bit of research on the 1M version of the N54, at least snap a few closeup pics of the turbos to see if they're different or if they have this BorgWarner stamp on them..
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06-01-2011, 12:13 PM	#4
IancoleTX Dillo boxers 272 Rep 3,360 Posts Drives: 2019 M5C Join Date: Jan 2010 Location: USA iTrader: (14)	how would changing the piston rings affect the amount of gunk building up on the intake valves? __________________ 2019 M5C Matte MBB / Tartufo
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06-01-2011, 12:18 PM	#5
stealth-twntrbo Captain 143 Rep 717 Posts Drives: 2020 740xi Join Date: Jun 2009 Location: NA iTrader: (3)	Changing the rings wouldn't reduce carbon build up on the valves.
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06-01-2011, 12:23 PM	#7
boostd92 Captain 63 Rep 762 Posts Drives: '11 E92 M-Sport Join Date: Jun 2009 Location: Chicago, IL iTrader: (1) Garage List 2011 BMW 335i M-Spo ... [7.26]	^ Probably not practically, but theoretically if the rings seal better, there would be less blow-by. Blow-by is basically unburned fuel, carbon, etc getting past the rings into the crank case. The crankcase separator takes this pressure and (after separating oil from the vapor), introduces this charge back into the intake, potentially carbonning up the intake valves with gunk. I highly doubt the difference in ring seal would be enough to see a measurable result. Not to mention the N54 is anything but "loose"... as a fairly high compression FI motor..
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06-01-2011, 12:25 PM	#9
Forcefed3 Banned 131 Rep 4,732 Posts Drives: 2008 335i Join Date: May 2010 Location: South iTrader: (2) Garage List 2008 335i [1.00]	If the turbos are indeed different, I am sure a swap would cost more than just getting RB's.
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06-01-2011, 12:44 PM	#12
Alpina_B3_Lux Colonel 264 Rep 2,563 Posts Drives: Audi R8 LMX, BMW M550i xDrive Join Date: Feb 2008 Location: Germany iTrader: (0) Garage List 2009 335i [8.90]	I'd be surprised if they used different turbos. For 340hp that wouldn't be necessary at all, and the 1M had quite a limited development budget. But let's see! Alpina_B3_Lux __________________ Audi R8 LMX, BMW M550i xDrive (G30 LCI); gone: Alpina B3 3,3 (E46), BMW 335i, Audi R8 V10 manual, Audi R8 V10, BMW M235i, BMW 550i F10
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06-01-2011, 12:56 PM	#14
968tomr Private First Class 4 Rep 160 Posts Drives: 2007 E92 335i Join Date: Jan 2011 Location: US:IN iTrader: (0)	Part numbers... Piston Rings: For the M Coupe - 11257610297 http://realoem.com/bmw/showparts.do?...86&hg=11&fg=20 For my 07 335i Coupe - 11257570405 http://realoem.com/bmw/showparts.do?...86&hg=11&fg=20 For a 2010 e92 pre LCI 11257610297 (Same as N54 1M Coupe) http://realoem.com/bmw/showparts.do?...86&hg=11&fg=20 Doesn't seem like this part changed just for the 1M Coupe Part number for the 2010 E92 N54 Turbo - 11657593015 Part number for the 1M Coupe N54 Turbo - 11657593015 -Tom
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