Has anyone tuned MPE ?

m3s65b4.x · 08-29-2022, 09:03 AM

MPE have its advantages but unfortunately too quiet muffler.
There are holes in tank upper part. I have a plan to diminish hole diameter to gain louder sound. Has anyone tried similar setup?

https://img12.img-bcg.eu/auto24/prod.../163073342.jpg

https://www.auto24.ee/products/summu...09-kw/2225009/

m3s65b4.x · 12-23-2024, 09:46 AM

Diminshed and closed both holes finally but no remarkable difference in sound, maybe little louder at WOT, don't have side by side comparison. I see more effect while restrict H-section but I leave MPE as it is now.
Eisenmann has more space to add valve between mufflers but can't see purchase and test in near future.

Sound clip - eventuri plenum+intake (w/o lid, mic between plenum and panel sub assy dash), stock midpipe (H-mod, X-delete), MPE (slightly modified, 2nd mic location near battery)

https://drive.google.com/file/d/1rRF...usp=drive_link

UPSROD · 12-23-2024, 11:26 AM

As far as I know they are straight through in the cans, you can see through them! The only way to make it louder is remove the cats!
.

08-29-2022, 09:03 AM	#1
m3s65b4.x Private First Class 197 Rep 129 Posts Drives: 2007 e92 6M/T Join Date: Jun 2022 Location: baltic iTrader: (0)	Has anyone tuned MPE ? MPE have its advantages but unfortunately too quiet muffler. There are holes in tank upper part. I have a plan to diminish hole diameter to gain louder sound. Has anyone tried similar setup? https://img12.img-bcg.eu/auto24/prod.../163073342.jpg https://www.auto24.ee/products/summu...09-kw/2225009/
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12-23-2024, 09:46 AM	#2
m3s65b4.x Private First Class 197 Rep 129 Posts Drives: 2007 e92 6M/T Join Date: Jun 2022 Location: baltic iTrader: (0)	Diminshed and closed both holes finally but no remarkable difference in sound, maybe little louder at WOT, don't have side by side comparison. I see more effect while restrict H-section but I leave MPE as it is now. Eisenmann has more space to add valve between mufflers but can't see purchase and test in near future. Sound clip - eventuri plenum+intake (w/o lid, mic between plenum and panel sub assy dash), stock midpipe (H-mod, X-delete), MPE (slightly modified, 2nd mic location near battery) https://drive.google.com/file/d/1rRF...usp=drive_link
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12-23-2024, 11:26 AM	#3
UPSROD Colonel 1400 Rep 2,365 Posts Drives: 2013 E92 M3 Join Date: Jul 2015 Location: Richland, Wa. iTrader: (2) Garage List 2013 BMW M3 [10.00]	As far as I know they are straight through in the cans, you can see through them! The only way to make it louder is remove the cats! .
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