Owner Topic - MR from Czech Republic - M2 CSL Turbomeister Edition revealed

chris719 · 10-05-2018, 11:07 AM

Maybe there are thermal or aerodynamic reasons for doing it. It seems unlikely that the width and distance between tips would be the same for the M2 and whatever else this would have been used on.

MR. · 10-05-2018, 11:13 AM

Quote:

Originally Posted by chris719

Maybe there are thermal or aerodynamic reasons for doing it. It seems unlikely that the width and distance between tips would be the same for the M2 and whatever else this would have been used on.

Also true... Just amazed it is hanging so low and in so much "open air", so to speak. It could have been engineered a lot better and positioned much better inside the bodywork.

MR

warrenw · 10-05-2018, 07:19 PM

Quote:

Originally Posted by MR.

Also true... Just amazed it is hanging so low and in so much "open air", so to speak. It could have been engineered a lot better and positioned much better inside the bodywork.

MR

I'm not an engineer (architect actually) but did they leave room because they don't want to heat up the trunk too much with heat from the exhaust? The battery and electronics are back there too, so maybe that's a reason.

MR. · 10-06-2018, 03:12 AM

Quote:

Originally Posted by warrenw

Quote:

Originally Posted by MR.

Also true... Just amazed it is hanging so low and in so much "open air", so to speak. It could have been engineered a lot better and positioned much better inside the bodywork.

MR

I'm not an engineer (architect actually) but did they leave room because they don't want to heat up the trunk too much with heat from the exhaust? The battery and electronics are back there too, so maybe that's a reason.

Maybe but I cannot remember the OG M2 having that much space.

MR

Robin_NL · 10-06-2018, 04:59 AM

Marc can you please point out where the OPFs are? I see cats etc but dunno?

Cheers
Robin

VIERsr · 10-06-2018, 07:17 AM

What you say are cats, they are actually OPFs

MR. · 10-06-2018, 09:45 AM

Quote:

Originally Posted by Robin_NL

Marc can you please point out where the OPFs are? I see cats etc but dunno?

Cheers
Robin

These are the OPF's. (See photo)

The cats are placed inside the downpipes. You cannot easily see them without removing some protection.

MR

MR. · 10-06-2018, 09:51 AM

For those of you who would like to know and are guessing. From left to right.

Rear muffler with valves and four end pipes,
Center muffler,
Two OPF's,
Down pipes are only visible for a few centimeters.

MR

warrenw · 10-09-2018, 01:38 AM

Quote:

Originally Posted by MR.

For those of you who would like to know and are guessing. From left to right.

Rear muffler with valves and four end pipes,
Center muffler,
Two OPF's,
Down pipes are only visible for a few centimeters.

MR

Slightly off topic, this is the US spec exhaust, what's in the same place as the OPF's? Secondary resonators?

M-Pilot · 10-09-2018, 01:51 AM

Quote:

Originally Posted by warrenw

Quote:

Originally Posted by MR.

For those of you who would like to know and are guessing. From left to right.

Rear muffler with valves and four end pipes,
Center muffler,
Two OPF's,
Down pipes are only visible for a few centimeters.

MR

Slightly off topic, this is the US spec exhaust, what's in the same place as the OPF's? Secondary resonators?

Secondary cats.

Yaron · 10-09-2018, 04:38 AM

Quote:

Originally Posted by MR.

For those of you who would like to know and are guessing. From left to right.

Rear muffler with valves and four end pipes,
Center muffler,
Two OPF's,
Down pipes are only visible for a few centimeters.

MR

From what i see in this pic there are no sensors for the OPFs. so isn't it possible to just delete them with no fault codes coming up ?

Davil · 10-09-2018, 04:56 AM

Quote:

Originally Posted by warrenw

Slightly off topic, this is the US spec exhaust, what's in the same place as the OPF's? Secondary resonators?

Donut warmers.

MR. · 10-09-2018, 05:04 AM

Quote:

Originally Posted by Yaron

From what i see in this pic there are no sensors for the OPFs. so isn't it possible to just delete them with no fault codes coming up ?

The OPFs are not actively monitored, that is correct! Still there are two sensors which are connected to a pressure difference monitor that checks at the end of the downpipes if the pressure flow through the downpipes and the first section of the exhaust is within limits.

This set up is used to make sure that electronics can react when the pressure becomes to high when for instance the OPFs clog up. That could happen. At that moment the engine could go into limp mode to protect the powertrain.

Phil_M2 shared with us that his car has been used for a test of about 400 km in which the car did not have the OPFs. In that time on CEL warning was produced by the car and the flow clearly stayed within limits of those sensors. Unfortunately, these are not hard tests stating that you can drive without.

Phil's car drove in Germany under normal weather situations. It could be that under other situations CEL warnings can pop up and that is something that needs to be tested properly. I would not remove them until engineers have properly tested this.

MR

MR. · 10-09-2018, 05:06 AM

Quote:

Originally Posted by warrenw

Slightly off topic, this is the US spec exhaust, what's in the same place as the OPF's? Secondary resonators?

Yup resonators

MR

ingmv · 10-19-2018, 12:48 PM

Are there any news yet from akrapovic ?

MR. · 10-19-2018, 01:52 PM

Quote:

Originally Posted by ingmv

Are there any news yet from akrapovic ?

I had a phone call during the week. Content is coming soon and then I can share more with you guys. They are now driving around with my car and testing different options. That is the only thing that I can tell you now. More soon!

MR

ingmv · 10-19-2018, 02:03 PM

Quote:

Originally Posted by MR.

I had a phone call during the week. Content is coming soon and then I can share more with you guys. They are now driving around with my car and testing different options. That is the only thing that I can tell you now. More soon!

MR

Thanks for the information

VIERsr · 10-19-2018, 02:16 PM

Can't wait to know the weight saving, oem exhaust seems to be really heavy

Meanie · 10-19-2018, 02:29 PM

Quote:

Originally Posted by MR.

Quote:

Originally Posted by ingmv

Are there any news yet from akrapovic ?

I had a phone call during the week. Content is coming soon and then I can share more with you guys. They are now driving around with my car and testing different options. That is the only thing that I can tell you now. More soon!

MR

Cannot wait! Hopefully they can improve on the sound they got out of the F80/82.

MR. · 10-20-2018, 04:46 AM

Quote:

Originally Posted by _RS4_

Can't wait to know the weight saving, oem exhaust seems to be really heavy

Expected weight saving I think we will be around 20 kg for the catback system.

MR

hellrotm · 10-21-2018, 12:33 AM

Quote:

Originally Posted by MR.

I had a phone call during the week. Content is coming soon and then I can share more with you guys. They are now driving around with my car and testing different options. That is the only thing that I can tell you now. More soon!

MR

Nice, look forward to seeing/hearing first prototype.

SD08 · 10-21-2018, 04:42 PM

Stoked

10-05-2018, 11:07 AM	#199
chris719 Major General 7394 Rep 7,340 Posts Drives: '08 M Roadster Join Date: Oct 2007 Location: NJ iTrader: (0)	Maybe there are thermal or aerodynamic reasons for doing it. It seems unlikely that the width and distance between tips would be the same for the M2 and whatever else this would have been used on.
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10-06-2018, 04:59 AM	#203
Robin_NL S0THPAW 8784 Rep 7,853 Posts Drives: HS M2 Competition Join Date: Apr 2005 Location: The Netherlands iTrader: (0)	Marc can you please point out where the OPFs are? I see cats etc but dunno? Cheers Robin
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10-06-2018, 07:17 AM	#204
VIERsr Major 2623 Rep 1,477 Posts Drives: BMW M2 Join Date: Apr 2018 Location: Zurich iTrader: (0) Garage List 2019 M2 Competition [0.00]	What you say are cats, they are actually OPFs Last edited by VIERsr; 10-06-2018 at 05:39 PM..
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10-06-2018, 09:51 AM	#206
MR. Colonel 4407 Rep 2,856 Posts Drives: BMW M2 CSL Turbomeister Join Date: Sep 2013 Location: Travelling / Managing / Writing iTrader: (0) Garage List 2020 MINI GP3 [0.00] 2013 MINI GP2.5 [8.50] 2018 BMW M2 Competi ... [10.00]	For those of you who would like to know and are guessing. From left to right. Rear muffler with valves and four end pipes, Center muffler, Two OPF's, Down pipes are only visible for a few centimeters. MR Attached Images
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10-19-2018, 12:48 PM	#213
ingmv New Member 24 Rep 14 Posts Drives: BMW F87 M2 Competition Join Date: May 2007 Location: Austria iTrader: (0)	Are there any news yet from akrapovic ?
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10-19-2018, 02:16 PM	#216
VIERsr Major 2623 Rep 1,477 Posts Drives: BMW M2 Join Date: Apr 2018 Location: Zurich iTrader: (0) Garage List 2019 M2 Competition [0.00]	Can't wait to know the weight saving, oem exhaust seems to be really heavy
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10-21-2018, 04:42 PM	#220
SD08 Private 41 Rep 80 Posts Drives: '19 M2 comp Join Date: Jul 2018 Location: Bay Area, CA iTrader: (0)	Stoked
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