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      06-13-2012, 06:18 PM   #1
paradocs98
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Rattling the parking garage

My Dinan exhaust on cold start resonates off the concrete walls of the parking garage at work, especially when I've backed into a spot, and I've noticed lately that the vibration sets off some other cars' alarms.

I know this isn't the loudest exhaust out there (that would be Gintani, Eisenmann race, etc.), but there must be something about hitting the right frequency that vibrates other cars. And I only have the mufflers, not the middle racing pipes... I thought this only happened on Harleys.

Anyone else?
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      06-13-2012, 06:59 PM   #2
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My Akra rear section does it on cold start, too. Low frequencies are the trick, not volume. Pretty funny pulling out of the garage after work and setting a few off.
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      06-15-2012, 09:18 PM   #3
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I have full Gintani race without cats or resonators. It can be loud as hell at times but I too have found it's not volume but certain frequencies. You might consider a tune with cold start deleted, I have it on my car and it helped a ton.
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      06-15-2012, 10:47 PM   #4
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I set alarms off all the time in both cars, akra evo in the M and a custom job on the 4.8... Love it, wife hates it
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      06-17-2012, 02:49 PM   #5
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Mine does that also, people actually look across from the other side of the garage..

It religiously sets of the alarm of this Porsche Panamera.

But I disabled the cold start secondary air pump, now it's very quiet on cold start and drives much much better when cold.
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      06-18-2012, 01:43 AM   #6
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My RPI GTc full exhaust is loud as hell and sets off car alarms. I also park in a structure at work and it echoes to the point it's embarrassing. Then I drive away and forget all about it. I'm known as the guy with the loud Beemer.
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      06-18-2012, 09:48 AM   #7
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Same here, my full resonated catless with Tubi Rumore sets off alarms a lot.
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      06-18-2012, 10:44 AM   #8
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My OEM modded exhaust does it and so does my Harley. I dont even know why people bother parking next to me lol.
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      06-18-2012, 11:13 AM   #9
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Akra evo has yet to do it, but past set-ups were much, much louder. First few times I thought it was funny, but then it became embarrassing... at the same time, who the hell needs an alarm that sensitive– I say it's their fault.
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      06-18-2012, 03:19 PM   #10
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Quote:
Originally Posted by SehrSchnell View Post
I did that with my Eisenmann Race all the time... I managed to do that even in an open parking lot - and yes, I'm 8 years old. OP: Just enjoy it.
My sentiments exactly
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      06-18-2012, 04:26 PM   #11
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My full catless AA does it too. I got rid of the cold start on my AA tune, I hated the cold starts
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      06-18-2012, 05:33 PM   #12
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i know a guy who has a full rpi setup on his e92 and in the gym parking lot he set off a car alarm. i find that crazy since the parking lot is outside and since he has dct the car was probably right around 1-1500 rpm.
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      06-18-2012, 09:49 PM   #13
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Oh yeah, cold starts make our M3's sound like they're possessed! I love it! I purposely seek out parking garages downtown to enjoy it a little more.
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      06-18-2012, 10:35 PM   #14
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It can be loud as hell at times but I too have found it's not volume but certain frequencies
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      06-18-2012, 11:20 PM   #15
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I took my old exhaust off because it was too loud for some folks on my street, but it got thumbs up from enthusiasts.

I knew it was too loud when I met someone at ground level and he said that my car sounded sick, but the problem was that I was parked 5 levels below him and he could still hear me...
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