|07-17-2012, 08:43 PM||#1|
Drives: BMW E90 335i /BMW 1M Coupe
Join Date: May 2012
What's wrong with 1M's exhuast?
Dear 1M friends:
I’m experiencing a quite embarrassed thing. Please see the following pictures of my 1M.
1. Both inside exhaust pipes are blank new and white, while the outside pipes are normally black.
2. Left side exhaust.
3. Right side exhaust.
Note: I DO NOT made the difference in color on purpose. All the pipes show the different colors normally.
4. 1M's exhaust testing at about 2000 rpm.
5. Even at 2000rpm, the left inside exhaust pipe is only infalted a little bit. While the right inside pipe is still not inflated at all. That means both inside exhuast pipes are basically no air comimg out at all.
I did the testing as follows: I take 2 freshness-maintaining bags and put on the inside pipes, and then use the rubber bandings tightened around the inside pipes. No need to test the side ones as we can see that the exhaust air coming out normally and the color is both black.
After I start the engine, at the beginning both bag are not getting full of air. This picture is taken at the engine at about 2000 rpm, at that moment, the left inside bag start to have some air in it, but it is not quite full, and the right inside pipe basically no air coming out, because the bag is still not inflated.
How about your 1M exhaust? Why is like that? Could you also post some pics of your exhaust.
Thanks a lot!
Last edited by Daniu9394; 07-17-2012 at 08:53 PM.
|07-18-2012, 03:22 AM||#4|
Drives: VO 1M Beast
Join Date: Mar 2008
Location: SyDnEy Oz
COBB tune ... ETS FMIC ... aFe CAI ... Meisterschaft GT exhaust ... BM OCC ... H&R springs :
|07-19-2012, 10:01 AM||#7|
Drives: 135i Silber mit/Rot 6MT N54
Join Date: Feb 2010
Location: Bayern, Germany
And this thread too... http://www.1addicts.com/forums/showt...1#post12321627
Yup, it seems to be a Chinese market thing. Seems that BMW AG put a different exhaust on Chinese market 1M's - and the inside pipes do not get much exhaust flow and hence stay clean! Btw... I noticed the same thing on the new F10 M5 when I sampled one recently.
You could order a non Chinese 1M exhaust or take your off and cut out the blockage.
I looked up the rear exhaust on RealOEM.com...
and low and behold... China DOES get a special different rear exhaust muffler! National China version...
China exhaust muffler #18107847100
EU/RoW spec muffler #18107845402
The curious thing is how can the 1M muffler/can pass Swiss noise regs while not pass Chinese ones!?!?
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