Rattling the parking garage

[paradocs98]

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?

[signes]

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.

[In Extremis]

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.

[klammer]

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

[BPMSport]

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.

[SDPRT]

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.

[PaneristiDriver]

Same here, my full resonated catless with Tubi Rumore sets off alarms a lot.

[F82_SID]

My OEM modded exhaust does it and so does my Harley. I dont even know why people bother parking next to me lol.

[onnex]

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.

[In Extremis]

Originally Posted by SehrSchnell

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

[edwinm3]

My full catless AA does it too. I got rid of the cold start on my AA tune, I hated the cold starts

[rjd598]

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.

[Denk]

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.

[StiltnerCor]

It can be loud as hell at times but I too have found it's not volume but certain frequencies

[ching]

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...