Ok, I have been wanting to do this for a awhile but have not had the chance... until now!
Here are some recordings of what a stock 330ci sounds like. I do, however, have the exhaust flap disabled.
Recording of exhaust...
Recording of engine bay...
I used a Neumann TLM-103 positioned in the manner shown above. Phantom power is provided by a Mackie 1402-VLZ Pro which has XDR low noise mic preamps. The mix is then fed to a portable Mini-Disc recorder. The recording is then dumped on to my DAW via 24-bit convertors. I then coverted the resulting audio (after maximizing audio) to mp3. (Note: there was no equalization on these recordings except for a lo-cut at 75hz on the mic to prevent rumbling.)
For good measure I will include this pic of my newly painted reflectors!
My next project is to record the BenFer CAI when I get it intalled.