n55 midpipe

zayzay · 06-29-2013, 09:31 PM

does the n55 midpipe produce the same performance, horsepower/torque as the maddads or berks?

Artemis · 06-30-2013, 03:48 AM

The difference, if any, will be hard to notice as - generally speaking - the gains of N55/MD/Berks are minimal/marginal anyway (+ ignoring the discussion of the impact of a resonator delete). Alike the weight gain for the car: it's that marginal that you, as a driver, won't notice the difference.

The unique selling point of alternative midpipes compared to the stock N54 midpipe is sound/noise, which appears to differ (N55 being a little less raspier - MD being the hooligan of the pack) + significantly reducing the notorious 'drone'.

If you get to drive 1Ms with N55/MD/Berks back-to-back, I guess you won't be able, on the basis of your personal experience, to point out the differences in torque/hp, if any (which eventually might be shown when dynoed). The only tell-tale sign will be the difference in sound and very maybe, to some small extent, the rasp your right foot might experience during acceleration (or is it only between the ears ?).

Conclusion: compare with the megapixels race of cameras: if they show you a 1024x768 sized 12MP picture next to a 13MP picture, do you think your human eyes (no computers) are capable of spotting the difference ?

Dackelone · 06-30-2013, 05:12 AM

The 1M mid pipes have the secondary cats with a resonator box (w/no resonator inside of it)! The N55 mids have no secondary cats but has a resonator. This is why when so many guys say the N55 mids solve the 1M's drone...

A friend of mine with a German spec 1M installed N55 mids on his car. He then sold his factory mid pipes to another friend. That guy cut open the resonator wanting to delete the res - only to find that BMW beat him too it!

he cut open the rear resonator...
Name: N54T mid pipe fake Midpipe-Mittelschalldaempfer-Original-BMW-N55-N54-135i-1M-High-Flow-Versi.jpg
Views: 4426
Size: 123.1 KB

Name: N54T mid pipe fake Midpipe-Mittelschalldaempfer-Original-BMW-N55-N54-135i-1M-High-Flow-Versi.jpg
Views: 4426
Size: 123.1 KB

only to find that BMW beat him to the res bypass job! Thats all factory pipes inside the resonator.
Name: N54T mid pipe fake Midpipe-Mittelschalldaempfer-Original-BMW-N55-N54-135i-1M-High-Flow-Vers.jpg
Views: 4698
Size: 93.2 KB

Name: N54T mid pipe fake Midpipe-Mittelschalldaempfer-Original-BMW-N55-N54-135i-1M-High-Flow-Vers.jpg
Views: 4698
Size: 93.2 KB

Artemis · 06-30-2013, 06:09 AM

Quote:

Originally Posted by Dackelone

The 1M mid pipes have the secondary cats with a resonator box (w/no resonator inside of it)! The N55 mids have no secondary cats but have a resonator. This is why so many guys say the N55 mids solve the 1M's drone...

Name: Fluffy.jpg
Views: 2527
Size: 37.1 KB

Artemis · 06-30-2013, 06:21 AM

Read also here (explaining why midpipes are only marginally increasing performance):
http://www.1addicts.com/forums/showthread.php?t=722206

Jay-K · 06-30-2013, 08:47 AM

Quote:

Originally Posted by Dackelone

The 1M mid pipes have the secondary cats with a resonator box (w/no resonator inside of it)! The N55 mids have no secondary cats but has a resonator. This is why when so many guys say the N55 mids solve the 1M's drone...

A friend of mine with a German spec 1M installed N55 mids on his car. He then sold his factory mid pipes to another friend. That guy cut open the resonator wanting to delete the res - only to find that BMW beat him too it!

Attachment 882564

Attachment 882565

Wow, so basically there are no cats??

1mmaniac · 06-30-2013, 09:48 AM

Quote:

Originally Posted by Jay-K

Wow, so basically there are no cats??

No secondary cats, primary cats in the DP's are still there.

bdaddylo · 06-30-2013, 10:07 AM

Quote:

Originally Posted by Jay-K

Wow, so basically there are no cats??

Dack's pictures are showing that the stock midpipes do not have a resonator which is probably creating most of the infamous 1M drone.

ozinaldo · 06-30-2013, 10:55 AM

In addition to all said above, the car also responds better/quicker with the N55 mids especially when it matters most, which is on/off/on again throttle and at higher revs, so there is simply better response and revving. It is noticeable, at least for me.

Most important of all, there are no downsides of this popular mod, if you can have them easily and without extra costs to swallow, they are 300-400 USD depending on where you are in US or in Europe. Other countries may have wildly different costs, I imported mine from UK, via Evolve, the same time I bought their rear muffler, saved from transport cost. If you don't want a mid-pipe swap primarily for sound enhancement don't even hesitate a second; but if you want a pipe that will give you a distinct and louder exhaust, choose something else.

Artemis · 06-30-2013, 11:39 AM

Quote:

Originally Posted by Jay-K

Wow, so basically there are no cats??

Check my earlier post for a better understanding: http://www.1addicts.com/forums/showp...0&postcount=27

Dackelone · 06-30-2013, 06:03 PM

Quote:

Originally Posted by bdaddylo

Dack's pictures are showing that the stock midpipes do not have a resonator which is probably creating most of the infamous 1M drone.

^^+1 correct!

The pics I posted... the mid pipe STILL has its secondary cats. And we know the 1M (N54T) has more efficient main cats than on a normal 135i (N54).

BMW got rid of the resonator on the mid pipes for more "bark". One mams "bark is another man's drone!

Dackelone · 06-30-2013, 06:04 PM

Quote:

Originally Posted by Jay-K

Wow, so basically there are no cats??

The main cat and secondary cats are still there. Just not the resonator on the mid pipe - bmw bypassed that and then covered it up.

Daniu9394 · 11-28-2013, 09:27 PM

Quote:

Originally Posted by Dackelone

The 1M mid pipes have the secondary cats with a resonator box (w/no resonator inside of it)! The N55 mids have no secondary cats but has a resonator. This is why when so many guys say the N55 mids solve the 1M's drone...

A friend of mine with a German spec 1M installed N55 mids on his car. He then sold his factory mid pipes to another friend. That guy cut open the resonator wanting to delete the res - only to find that BMW beat him too it!

he cut open the rear resonator...
Attachment 882564

only to find that BMW beat him to the res bypass job! Thats all factory pipes inside the resonator.
Attachment 882565

Hi,David:
These 2 pictures show us that the mid pipe of N55 is straight through? Why BMW design like this?
And how about the midpipe for 1M? is it also straight through?

daniel

Dackelone · 11-28-2013, 09:47 PM

Quote:

Originally Posted by Daniu9394

Hi,David:
These 2 pictures show us that the mid pipe of N55 is straight through? Why BMW design like this?
And how about the midpipe for 1M? is it also straight through?

daniel

Because BMW wanted the car to have some BARK to it when you rev'd the engine.

No the N55 mid pipe is not a straight thru pipe. It has a resonator/muffler inside that metal box. This is why 1M guys who have lots of drone on the highway... when they install the N55 mid pipe their droning goes away.

Em/1 · 12-02-2013, 06:03 PM

Quote:

Originally Posted by Artemis

Read also here (explaining why midpipes are only marginally increasing performance):
http://www.1addicts.com/forums/showthread.php?t=722206

That link suggests that the N55 might give 10HP which is likely better than any axle back can do, and not bad for $350!

eeghie · 12-02-2013, 06:50 PM

Quote:

Originally Posted by Dackelone

... only to find that BMW beat him to the res bypass job! Thats all factory pipes inside the resonator.
Attachment 882565

Just to be sure, did he check there isn't a hole on the bottom/invisible side of the left compartment's inner pipe?

Dackelone · 12-02-2013, 08:15 PM

Quote:

Originally Posted by eeghie

Just to be sure, did he check there isn't a hole on the bottom/invisible side of the left compartment's inner pipe?

My buddy who took these pics of the 1M mid pipe works for BMW AG(same guy who retrofitted EDC to his 1M). I think he would have seen that. He told me he was really surprised to see BMW using this "straight pipe" inside of a fake resonator.

Now we all know why the 1M has "some" drone to it.

eeghie · 12-03-2013, 02:17 AM

Quote:

Originally Posted by Dackelone

...He told me he was really surprised to see BMW using this "straight pipe" inside of a fake resonator.

Now we all know why the 1M has "some" drone to it.

Indeed exceptional that a mass production company does this ... . Certainly easier for the aftermarket to offer midpipe weight saving.

06-29-2013, 09:31 PM	#1
zayzay First Lieutenant 76 Rep 370 Posts Drives: bmw 1M Join Date: Aug 2011 Location: Florida iTrader: (0)	n55 midpipe does the n55 midpipe produce the same performance, horsepower/torque as the maddads or berks?
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06-30-2013, 03:48 AM	#2
Artemis Moderator 29331 Rep 13,093 Posts Drives: BMW M2 Competition Join Date: Jun 2011 Location: Belgium iTrader: (0)	The difference, if any, will be hard to notice as - generally speaking - the gains of N55/MD/Berks are minimal/marginal anyway (+ ignoring the discussion of the impact of a resonator delete). Alike the weight gain for the car: it's that marginal that you, as a driver, won't notice the difference. The unique selling point of alternative midpipes compared to the stock N54 midpipe is sound/noise, which appears to differ (N55 being a little less raspier - MD being the hooligan of the pack) + significantly reducing the notorious 'drone'. If you get to drive 1Ms with N55/MD/Berks back-to-back, I guess you won't be able, on the basis of your personal experience, to point out the differences in torque/hp, if any (which eventually might be shown when dynoed). The only tell-tale sign will be the difference in sound and very maybe, to some small extent, the rasp your right foot might experience during acceleration (or is it only between the ears ?). Conclusion: compare with the megapixels race of cameras: if they show you a 1024x768 sized 12MP picture next to a 13MP picture, do you think your human eyes (no computers) are capable of spotting the difference ? __________________ ///M is art ↔ Artemis
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06-30-2013, 05:12 AM	#3
Dackelone European Editor 10532 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	The 1M mid pipes have the secondary cats with a resonator box (w/no resonator inside of it)! The N55 mids have no secondary cats but has a resonator. This is why when so many guys say the N55 mids solve the 1M's drone... A friend of mine with a German spec 1M installed N55 mids on his car. He then sold his factory mid pipes to another friend. That guy cut open the resonator wanting to delete the res - only to find that BMW beat him too it! he cut open the rear resonator... only to find that BMW beat him to the res bypass job! Thats all factory pipes inside the resonator. __________________ Dackel's European Delivery Museum Guide
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06-30-2013, 06:21 AM	#5
Artemis Moderator 29331 Rep 13,093 Posts Drives: BMW M2 Competition Join Date: Jun 2011 Location: Belgium iTrader: (0)	Read also here (explaining why midpipes are only marginally increasing performance): http://www.1addicts.com/forums/showthread.php?t=722206 __________________ ///M is art ↔ Artemis
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06-30-2013, 10:55 AM	#9
ozinaldo Brigadier General 116 Rep 3,070 Posts Drives: 1M Join Date: Jan 2011 Location: Lisbon, Portugal iTrader: (0)	In addition to all said above, the car also responds better/quicker with the N55 mids especially when it matters most, which is on/off/on again throttle and at higher revs, so there is simply better response and revving. It is noticeable, at least for me. Most important of all, there are no downsides of this popular mod, if you can have them easily and without extra costs to swallow, they are 300-400 USD depending on where you are in US or in Europe. Other countries may have wildly different costs, I imported mine from UK, via Evolve, the same time I bought their rear muffler, saved from transport cost. If you don't want a mid-pipe swap primarily for sound enhancement don't even hesitate a second; but if you want a pipe that will give you a distinct and louder exhaust, choose something else. __________________ "The mark of a great car is one whose overall competence exceeds what you should expect from its individual components and the 1M does just that", Chris Harris. BMW 1M-SOLD-: TECH: Evolve Race+N55mids, Evolve IC, Michelin PSS, ER cp, aFe filter, CDVx, Vorshlag camber plates, BMS OCC EXTERIOR: trunk spoiler, blacklines, black grills, IND goodies INTERIOR: Alcantara steering wheel, steel pedals, custom mats, MPower e-brake. Last edited by ozinaldo; 06-30-2013 at 11:01 AM..
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