[chrispraeger]

I was able to take some photos at the Lightweight Heaquarters in Germany during the first analysis of the European spec M2 Competition exhaust system.

The intention was making a comparison to the standard S55 M3/M4 Midpipe and get more knowledge about the new OPF/GPF (gasoline particle filters) in order to build a new performance exhaust system for the European market.

By the way: the project car was one of the very first delivered in Germany.
Hockenheim Silver is definitely not white

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

The particle filter:

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

And here the comparison to the "normal" S55 secondary cats / mid pipe:

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

The silencer of the M2C is obviously really really big...

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

Indeed, it was a very interesting day with nice people and beautiful cars.
Lightweight has now an idea, how to develop their new M2C exhaust system.

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

I will close with a comparison between Hockenheimsilver and Lime Rock Grey

BMW M2 Competition Exhaust Dev by Chris Präger, auf Flickr

[Robin_NL]

Wow, M2c mit Normalbremsen!

Danke Chris.

edit: beautiful M3CS but i also like your M2 with the HRE(?) wheels.

Cheers
Robin

[chrispraeger]

Originally Posted by Robin_NL

Wow, M2c mit Normalbremsen!

Danke Chris.


Cheers
Robin

You're welcome, Robin

--

Gerne, Robin

[MR RIZK]

I don't see any bungs pre or post the opf for any sensors in the photos or is that my imagination?

[chrispraeger]

Originally Posted by MR RIZK

I don't see any bungs pre or post the opf for any sensors in the photos or is that my imagination?

No - there are no sensors.

[Twinsturbo]

Nice, straight midpipe and 0,1bar more boost because OPF. Should be a nice noticeable upgrade!

[n55co]

awesome, thanks for sharing!
Any pictures from the downpipes? As the US and EU Version should be different and there should be a differential pressure sensor?

[AlpsRider]

Great shots, you have some nice glass on your camera :-)

[chrispraeger]

Originally Posted by n55co

awesome, thanks for sharing!
Any pictures from the downpipes? As the US and EU Version should be different and there should be a differential pressure sensor?

The downpipes are the same.

Originally Posted by AlpsRider

Great shots, you have some nice glass on your camera :-)

Thx.
The camera is low budget.
A gift from my father for 200 Euros.
Nikon D3300 with a 35mm lens...

[ChrisK]

Originally Posted by chrispraeger

The downpipes are the same.

Thx.
The camera is low budget.
A gift from my father for 200 Euros.
Nikon D3300 with a 35mm lens...

35mm only? That's why. You get great shots from a prime lens.

[chrispraeger]

Originally Posted by ChrisK

35mm only? That's why. You get great shots from a prime lens.

I know...

[MR.]

Originally Posted by chrispraeger

The downpipes are the same.

Thx.
The camera is low budget.
A gift from my father for 200 Euros.
Nikon D3300 with a 35mm lens...

Originally Posted by chrispraeger

No - there are no sensors.

Chris, the sensor is on the down pipe! The down pipe shape is the same, but there is an additional sensor fitted at the end of the down pipes.

You can see it here: https://www.realoem.com/bmw/enUS/sho...diagId=18_1537

Part numbers are also different between EU and non-EU as you can see here: https://www.realoem.com/bmw/enUS/sho...diagId=18_1089

There it might be worth to see how this sensor looks, so that we can make a comparison between a down pipe with and without!

MR

[arquitecto]

What a beautiful shop!

Those guys don’t play around...

[Davil]

Originally Posted by MR.

Chris, the sensor is on the down pipe! The down pipe shape is the same, but there is an additional sensor fitted at the end of the down pipes.

You can see it here: https://www.realoem.com/bmw/enUS/sho...diagId=18_1537

Part numbers are also different between EU and non-EU as you can see here: https://www.realoem.com/bmw/enUS/sho...diagId=18_1089

There it might be worth to see how this sensor looks, so that we can make a comparison between a down pipe with and without!

MR

If you think about this you’d imagine it looks at the differential pressure. If it changes significantly post filter then it will know to enable blast furnace mode to clean it out. So if you left it there, it should never trigger blast furnace mode. I can’t think of a scenario where it would care if there was no significant change. If you removed it entirely I would imagine it would throw a fault. That would involve some coding.

[MR.]

Originally Posted by Davil

If you think about this you’d imagine it looks at the differential pressure. If it changes significantly post filter then it will know to enable blast furnace mode to clean it out. So if you left it there, it should never trigger blast furnace mode. I can’t think of a scenario where it would care if there was no significant change. If you removed it entirely I would imagine it would throw a fault. That would involve some coding.

You would think that... Not sure what the real outcome is. It is all the specialists need to find out over the coming weeks.

MR

[VIERsr]

Great photos, thank you! So now it is clear that EU M2C has OPF instead of secondary kat and not in addition. I noticed that M2C and M3/4 DPs have the same code..

[chrispraeger]

Originally Posted by MR.

You would think that... Not sure what the real outcome is. It is all the specialists need to find out over the coming weeks.

MR

Thank you for the additional input

[n55co]

Originally Posted by MR.

You would think that... Not sure what the real outcome is. It is all the specialists need to find out over the coming weeks.

MR

pretty sure, there will be a "low limit" for the signal, so if the pressure below a certain value -> CEL

[phil_m2]

Thanks for sharing Chris!

Glad I could be a part of the development.
I also took some pics and made some videos.

Sadly I can`t share them from my mobile phone.
But you can all see it on my Instagram (@phil_m2).

[MR.]

Originally Posted by n55co

pretty sure, there will be a "low limit" for the signal, so if the pressure below a certain value -> CEL

Yup, brainstormed again today with my tuning specialist colleague today. We checked Realoem and watched the photos here with great interest.

We are working on ideas as we speak, but we need my car on the dyno to really understand what we can do.

My car will go into the exhaust and tuning process early October, so give all tuners a bit of time to get some decent ideas and work out some products. They are all waiting for cars to test.

MR

[Robin_NL]

Originally Posted by phil_m2

Thanks for sharing Chris!

Glad I could be a part of the development.
I also took some pics and made some videos.

Sadly I can`t share them from my mobile phone.
But you can all see it on my Instagram (@phil_m2).

Thanks, your car is beautiful with the frontlip and the blue brakes



Cheers
Robin

[twboy1999]

look exactly same as north America's?

https://f87.bimmerpost.com/forums/sh...&postcount=365