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      08-28-2011, 10:43 AM   #104
bdaddylo's Avatar
Drives: 2011 E90 M3 ZCP
Join Date: Dec 2010
Location: Houston, TX

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Originally Posted by Hotrod99 View Post
Well either that, or i'm clearly not hearing what others have heard.

I've heard the words "Boom" and "Bang" used in some posts. Mine is neither a boom or a bang.
Drone isn't exactly a Boom or Bang, but rather a deep low frequency sound that reverberates throughout the cabin. It should be noticeably louder than the normal exhaust note and it usually occurs in a certain rpm range. I highly doubt it is an engineered feature, but rather an engineering miss.

I don't have my 1M yet, but I currently have a performance exhaust on my 550i that drones from 1,500 to 1,900 rpm. It can be annoying depending on my mood.
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