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      01-11-2013, 05:15 PM   #69
sycd's Avatar

Drives: F80 YMB 6MT
Join Date: Mar 2008
Location: SF Bay Area

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2015 M3  [0.00]
Originally Posted by GOLFFRR View Post
I am in the same boat as well. I always have cold start delete on my cars just bc of my neighborhood and since I leave for work or golf super early every morning. I still have yet to hear a race in person at idle or slow acceleration, I have only heard the race cruising on the HWY in a caravan. I would be curious what people who own the exhaust can say about the sound at warm idle or cold start delete is like and also what it is like taking off early in the morning at low low rpm/speed
I just used SPL Meter on my iPhone to measure the sound volume during cold start and after cold start at idle:

- cold start: ~98 dB
- after cold start, idle: ~82 dB

I was standing about 4 feet from the back of the car pointing the phone mic at the exhaust.

So it's loud but not annoyingly loud to me. I can definitely hear it from within the house but the family or neighbors never complained (but I don't usually leave the house very early.)

For comparison sake my X5 xDrive50i with M perf package has a cold start volume of ~91 dB.
2015 M3 6MT | Yas Marina Blue, CF Roof, Cloth | Adaptive M Susp, 437M 19" Silver | MPE

Last edited by sycd; 01-12-2013 at 03:44 PM.