noise at 75-80 mph

chrisb · 11-30-2009, 10:21 AM

This may be a silly questions, but in my 30i I've noticed a change in noise as I get to just about 77 mph. I can't tell if it's tire/road noise or possibly just the exhaust note at that speed. It's difficult to describe, but sounds a little as though I were driving over a very lightly ribbed road - sort of a vibration that you hear, but don't feel.

Has anyone noticed something similar? I just want to figure out if it's normal and Ok or if I need to have the alignment or something else checked. I'm heading out on a long-ish drive this weekend from Santa Barbara to Carmel so if there's something that needs checking, i figure I should do it now.

thanks!

riccis · 11-30-2009, 04:47 PM

Is this with the roof up or down? If up, did you have any windows open at the time? Probably silly questions but........

chrisb · 11-30-2009, 07:05 PM

I should have said - it's with the roof and windows up. I guess it could be related to wind over the roof - or the wind noise just drowns out whatever else it is.

Could be me being overly sensitive, too - I'm really particular about noises, creaks, squeaks, etc...

ChuckB · 12-01-2009, 12:19 PM

Chris: Is the Cargo Area Partition up or down, I found it would resonate a bit in the down position if the top was up and make a drumming noise. It got much quieter when I raised it up.

MilitaryE89 · 12-01-2009, 12:37 PM

and i found the opposite...seems partition down makes less noise...but then again im paraniod and particular about noises too...im almost certain my car is falling apart and is as noisy as a model T...paranoid!

chrisb · 12-01-2009, 03:36 PM

The partition has been down, I'll try it up as well and see if there's any difference one way of the other. I was out with top up this morning and the noise was very much present (at least to me...) at just about 78-80 mph.

Thanks for the ideas!

riccis · 12-01-2009, 05:32 PM

Quote:

Originally Posted by chrisb

The partition has been down, I'll try it up as well and see if there's any difference one way of the other. I was out with top up this morning and the noise was very much present (at least to me...) at just about 78-80 mph.

Thanks for the ideas!

And does it disappear beyond that speed?

mikeinaustin · 12-01-2009, 06:48 PM

not meaning to hijack....but...anyone dynamat their trunk yet? results?

chrisb · 12-01-2009, 07:09 PM

Quote:

Originally Posted by riccis

And does it disappear beyond that speed?

good question - I've had it a couple of weeks and haven't anywhere that it would have been prudent to get above 80. maybe this weekend though....

11-30-2009, 10:21 AM	#1
chrisb New Member 0 Rep 17 Posts Drives: Z4 30i Join Date: Nov 2009 Location: Santa Barbara, CA iTrader: (0)	noise at 75-80 mph This may be a silly questions, but in my 30i I've noticed a change in noise as I get to just about 77 mph. I can't tell if it's tire/road noise or possibly just the exhaust note at that speed. It's difficult to describe, but sounds a little as though I were driving over a very lightly ribbed road - sort of a vibration that you hear, but don't feel. Has anyone noticed something similar? I just want to figure out if it's normal and Ok or if I need to have the alignment or something else checked. I'm heading out on a long-ish drive this weekend from Santa Barbara to Carmel so if there's something that needs checking, i figure I should do it now. thanks!
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11-30-2009, 04:47 PM	#2
riccis Private First Class 11 Rep 176 Posts Drives: Z4 30i Auto Join Date: Oct 2009 Location: London iTrader: (0)	Is this with the roof up or down? If up, did you have any windows open at the time? Probably silly questions but........
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11-30-2009, 07:05 PM	#3
chrisb New Member 0 Rep 17 Posts Drives: Z4 30i Join Date: Nov 2009 Location: Santa Barbara, CA iTrader: (0)	I should have said - it's with the roof and windows up. I guess it could be related to wind over the roof - or the wind noise just drowns out whatever else it is. Could be me being overly sensitive, too - I'm really particular about noises, creaks, squeaks, etc...
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12-01-2009, 12:19 PM	#4
ChuckB Lieutenant 18 Rep 448 Posts Drives: 2020 X2 2.0i Join Date: Mar 2008 Location: Hockenheim, Germany (APO) iTrader: (0)	Chris: Is the Cargo Area Partition up or down, I found it would resonate a bit in the down position if the top was up and make a drumming noise. It got much quieter when I raised it up.
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12-01-2009, 12:37 PM	#5
MilitaryE89 Private First Class 7 Rep 188 Posts Drives: 2008 328i, 2009 sDrive30i Join Date: May 2009 Location: APO, AE iTrader: (0)	and i found the opposite...seems partition down makes less noise...but then again im paraniod and particular about noises too...im almost certain my car is falling apart and is as noisy as a model T...paranoid!
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12-01-2009, 03:36 PM	#6
chrisb New Member 0 Rep 17 Posts Drives: Z4 30i Join Date: Nov 2009 Location: Santa Barbara, CA iTrader: (0)	The partition has been down, I'll try it up as well and see if there's any difference one way of the other. I was out with top up this morning and the noise was very much present (at least to me...) at just about 78-80 mph. Thanks for the ideas!
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12-01-2009, 06:48 PM	#8
mikeinaustin First Lieutenant 42 Rep 362 Posts Drives: 2010 z4 3.0 crimson red Join Date: Sep 2009 Location: austin, tx iTrader: (0)	not meaning to hijack....but...anyone dynamat their trunk yet? results?
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