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#1
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Exhaust sound changes due to M button?
Thanks, Dave |
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#2
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i have an e70 30i and i noticed the exhaust sounds different when i shift to Sport mode. i think the engine revs higher hence the change in sound.
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#3
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Certainly, higher engine speeds= more sound, but I'm confident that there is a distinct difference from the moment that the M button is pressed. And the owner's manual mentions it, but does not elaborate.
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#4
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There is a flap in the exhaust the opens up when the "M" button is pressed.
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#5
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^^^what he said.
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#6
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Exactly. See pic below.
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#7
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Lets see pics of your White /Cinnamon combo.
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#8
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Actually the sound change is not caused by the M button but by the settings of the M button (Sport).
Btw: could somebody check out if removing THIS hose actually causes the flap inside the exhaust tip to stay open permanently, hence providing the sportier sound all the time ? If it works and you leave it removed, just make sure you put something inside that hose to avoid dirt/humidity entering. |
#9
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Quote:
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#10
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Just a guess but... the flap may keep a little back pressure to help with lowerend torque. My guess would be that even without the M button pressed when the engine reaches hight RPM that it opens to allow the engine to breath and produce more hp.
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