Exhaust Sound Poll

Silverzedtom · Post by **Silverzedtom** » Thu Mar 14, 2019 2:00 pm

I had the back box removed in my 2.5si, I have mixed feelings about it.

It sounds so good when you put your foot down, it pops and crackles when changing gear, lifting off etc and doesn’t drone like you’d imagine it might at low revs but it is loud.

If you have neighbours close by and use your car daily I wouldn’t be surprised if it agitated them, especially when it’s started from cold.

I’m planning a quad conversion in the future and will be having a sporty box put in, mainly for the neighbours - although they haven’t said anything to date. If it wasn’t for other people and trackday noise limits I’d 100% leave it in, it doesn’t annoy me at all even driving down to the dordogne wasn’t too much with it sat at around 3k rpm.

It also depends on how much your going to have the roof down, any drone is much quieter when the roof is down.

Anyone ever had the noise tested at a track with no back box on an Si? I’ve just assumed it will fail so have been waiting until I get a box fitted.

nick_l · Post by **nick_l** » Thu Mar 14, 2019 2:18 pm

I’ve a pretty accurate dB meter that I use for work so will give mine a test later

Silverzedtom · Post by **Silverzedtom** » Thu Mar 14, 2019 4:55 pm

nick_l wrote: ↑Thu Mar 14, 2019 2:18 pm I’ve a pretty accurate dB meter that I use for work so will give mine a test later

that would be great if it’s no trouble

Doddsy · Post by **Doddsy** » Thu Mar 14, 2019 6:40 pm

Has anyone removed the middle box on an Si?

R60BBA · Post by **R60BBA** » Thu Mar 14, 2019 9:42 pm

Doddsy wrote: ↑Thu Mar 14, 2019 6:40 pm Has anyone removed the middle box on an Si?

It will become boomy if you do that.

This is what an N52B30 sounds like with the middle box + kidney resonator removed and an Eisenmann Race backbox installed.

https://www.instagram.com/p/Bdpkg_Nl82k ... i4kl38kbc1

Dave 2 dogs · Post by **Dave 2 dogs** » Thu Mar 14, 2019 9:47 pm

As Dave D said
Had an eisenmann race back box on my e85 3.0 I
I now own a e89 3.5i and currently saving the pennies to get an eisenmann race setup for it.
As good as it sounds, I’m still missing the eisenmann way too much!!! Can’t wait to hear it on this little beauty, check out some YouTube videos -e85/86 -89 eisenmann exhausts .... absolute quality

AquaMatt · Post by **AquaMatt** » Thu Mar 14, 2019 11:30 pm

I’ve just fitted the “eBay exhaust” to my e86.
The sound is super, not too loud or at all droney. Much more character low down and pops and crackles all the way up and down. Fitting was easy once the flanges had been rotated for the N52.
I did have the Warren engineering bypass pipes on the backbox but I still wanted more...

chutley · Post by **chutley** » Sat Mar 16, 2019 8:37 pm

So far...

36% of owners leave it stock.
64% of owners make it noisy.

ErrErrminator · Post by **ErrErrminator** » Sat Mar 16, 2019 8:49 pm

Mine has a DLV modified OE backbox. I love it. Not too loud and doesn’t drone, but sufficient volume increase and aggressive sound, particularly as the revs rise, to create an almost permanent grin. Some lovely pops and crackles as well. Being a modified box it looks completely stock though.

tug · Post by **tug** » Sun Mar 17, 2019 12:21 pm

Road Warrior will be here shortly. He loves the sound of his and to be fair it does sound the dogs.

Iggy · Post by **Iggy** » Sun Mar 17, 2019 1:00 pm

I run an Eisenmann Sport backbox which i think sounds really good and well-balanced between noise and daily usability. The car had a backbox delete when i first purchased it which was a lot of fun at first, but as the car is a daily, it got tiring within the first month or so. I also think the sound of the Eisenmann is generally much better - it's more raspy and throaty whereas the backbox delete was very boomy, 'flabby' sounding, and totally lacking any shape. Anyway, it's all down to personal preference and how you use the car.

road warrior · Post by **road warrior** » Sun Mar 17, 2019 7:07 pm

both of my zed's have dlv back box mods,

z4 2.0
https://youtu.be/J113PXKvTGQ

z4 3.0
https://youtu.be/9QeuilF4gWs

road warrior · Post by **road warrior** » Sun Mar 17, 2019 7:17 pm

tug wrote: ↑Sun Mar 17, 2019 12:21 pm Road Warrior will be here shortly. He loves the sound of his and to be fair it does sound the dogs.

its all down to personal taste, i know you like yours quiet so you can hear your rasta blaster

road warrior · Post by **road warrior** » Sun Mar 17, 2019 7:42 pm

i was thinking about how some folk say it can be droney, and im wondering if this is related to the 5 speed box, the ratio would be higher and i suspect cruising speed sits right on the drone point around 2.5k-3.0k area, also i do very little constant speed motorway type of driving and so even if it did drone i wouldn't notice.

Jollyjoiner · Post by **Jollyjoiner** » Sun Mar 17, 2019 7:52 pm

I've not voted because I no longer have an e85 but the e89 35i I have sounds bloody fantastic with it's Milltek system on it

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