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E12, E28, E34, E39, E60 General discussion and technical help for all year 5 series cars.

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Old 08-24-2007, 09:53 PM   #1
Kasei
 
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Air sound?

Ok I was going to watch a football game up at the high school last night. The road to the school is a great with lots of twisties.(there is even a pretty nice corkscrew!) So I was on my way and the M50 was starting it's typical 3500rpm roar, then at about 4000rpm I hear a slight whistling like sound, almost like a supercharger turning. I tried to get it to do it again today but it only did it once for about three secs. Any ideas on what the sound is? Maybe I just never caught the sound before or maybe I'm just a little paranoid. Thanks guys.

Edit: It didn't sound like a supercharger spinning, just the increased airflow from it.....you know what I'm talking about, I can't think right now.
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Old 08-24-2007, 10:44 PM   #2
witeshark
 
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I'd look over the intake and see if there are any cracks in the more flexible parts
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Old 08-24-2007, 10:46 PM   #3
Kasei
 
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I was thinking intake but I wanted to get some direction first seeing as in most cases I know nothing. Thanks.
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