Which mod for a bit more growl and a bit more grunt?

I

ionofchios

Member
Hi guys,

I’ve had my 3.0si coupe for about 6 months now and have done quite a few things to it: Bilsteins all round, new wishbones, new bushes in important places, new fluids, CDV delete, wheel alignment and a bunch of other things. Now I’m thinking it would be nice to get a bit more audible snarl out of the exhaust (nothing silly, but something I can actually hear, unlike now), and a bit more power (not much, but something I can feel). Is there a simple and not too expensive mod, or mods, that would do this? Recommendations please!
 
Sound Generator mod (foam removal)

Bypass pipes

GruppeM

New Exhaust

Remap for power but you probably wont see great gains.
 
A bit more power might be a struggle on the 3.0si unless you go down the supercharger route to be honest... but that said depending on mileage/condition of engine a good service or a few part replacements may help, vanos solenoids or vanos unit in particular. There's a few people on here that have benefited from an overhaul of the vanos system. not something i've done myself but now i'm on 97k I'm considering a refresh to see if it has any impact.

I've had extensive exhaust work done on my coupe and it's insanely loud... actually it's too loud but it's a lot of fun!! :evil:

I've had the front silencer removed and replaced with a Y-Pipe and a running a very small free flowing back box, it gurggles, pops and bangs and sounds incredible at high revs.... i originally had a much quieter back box with this Y-Pipe system but wasn't happy so got this smaller one made up, the car was so much more responsive after fitting the free flowing box and revs quicker than it did previously! That could just be due to the first box being too restrictive though!

IMG_1093.JPG

There's also the DLV exhaust mod that a lot of people have... I've heard this in the flesh and it's way nicer than standard and a lot cheaper than a full system so may be worth considering as it's not over the top, certainly a nicer note than stock with the added bonus of pops and bangs. If you do a search on the forum you'll probably find a link or 2 to videos of the modded back box.

I did the sound generator mod and although it does increase noise i didn't like it, was a bit too much and sounded artificial (just my opinion) so have put them back in... there's 2 foams in there so you can play around and try to get a bit more noise and see if it suits you. Outside of that there's induction kits, off the shelf for the 3.0si engine is a bit limited and very expensive, the AFE kit is around £600 new but gives the engine a nice growl.

The other thing you could try for a bit more performance is an LSD, expensive and won't increase power but will help you get the power down better.
 
As above, drop Mike a pm, his boxes give a bit more of a meaty sound, crackle and pops. Leave the sound generator as it is, it's not a nice sound when both are out, too boomy in the Coupe imo
 
Thanks, guys! I’ve been reading around about DLV and listening to some videos, and looks like just the sort of thing I would want. Only issue is I am in Finland, so exchanging old back box not so easy. I’ll ping and ask if there’s any possibilities.
 
philbo909 said:
Leave the sound generator as it is, it's not a nice sound when both are out, too boomy in the Coupe imo
Click to expand...

Yes, had a go with this last weekend and I agree. Removed both inserts and it sounds kinda odd, though not so bad if you have windows open and it mixes with exhaust note. I will go to one foam plug and see what that’s like, but it is not really any kind of substitute for actual exhaust tones.
 
ionofchios said:
Thanks, guys! I’ve been reading around about DLV and listening to some videos, and looks like just the sort of thing I would want. Only issue is I am in Finland, so exchanging old back box not so easy. I’ll ping and ask if there’s any possibilities.
Click to expand...
Road trip?
 
ionofchios said:
Thanks, guys! I’ve been reading around about DLV and listening to some videos, and looks like just the sort of thing I would want. Only issue is I am in Finland, so exchanging old back box not so easy. I’ll ping and ask if there’s any possibilities.
Click to expand...

Just get your local exhaust shop to do the job, it's very simple. I'm sure DLV will share what's needed.
 
What does Mr [ref]ducklakeview [/ref] charge for these backboxes of his? I imagine the cost of posting a backbox up to him to do an exchange is about as much as the saving you'd make for the exchange.
 
James, as you are in Somerset MachineMonkey in Oxfordshire might be a better option for you.

I'm pretty sure I've read about him doing a similar job, but he does it on your car IIRC rather than an exchange service.

But it would just give you an excuse for a decent drive in your Z4! :thumbsup:

Or you could just send them both a pm and go from there.
 
Chris1981 said:
A bit more power might be a struggle on the 3.0si unless you go down the supercharger route to be honest... but that said depending on mileage/condition of engine a good service or a few part replacements may help, vanos solenoids or vanos unit in particular. There's a few people on here that have benefited from an overhaul of the vanos system. not something i've done myself but now i'm on 97k I'm considering a refresh to see if it has any impact.

I've had extensive exhaust work done on my coupe and it's insanely loud... actually it's too loud but it's a lot of fun!! :evil:

I've had the front silencer removed and replaced with a Y-Pipe and a running a very small free flowing back box, it gurggles, pops and bangs and sounds incredible at high revs.... i originally had a much quieter back box with this Y-Pipe system but wasn't happy so got this smaller one made up, the car was so much more responsive after fitting the free flowing box and revs quicker than it did previously! That could just be due to the first box being too restrictive though!

IMG_1093.JPG

There's also the DLV exhaust mod that a lot of people have... I've heard this in the flesh and it's way nicer than standard and a lot cheaper than a full system so may be worth considering as it's not over the top, certainly a nicer note than stock with the added bonus of pops and bangs. If you do a search on the forum you'll probably find a link or 2 to videos of the modded back box.

I did the sound generator mod and although it does increase noise i didn't like it, was a bit too much and sounded artificial (just my opinion) so have put them back in... there's 2 foams in there so you can play around and try to get a bit more noise and see if it suits you. Outside of that there's induction kits, off the shelf for the 3.0si engine is a bit limited and very expensive, the AFE kit is around £600 new but gives the engine a nice growl.

The other thing you could try for a bit more performance is an LSD, expensive and won't increase power but will help you get the power down better.
Click to expand...

You need to clean your car, it's filthy!! :rofl:
 
Is there anyone in the Scotland area that does these back box mods, is there much of a sound difference between this and the back box delete?
 
redtailed78 said:
Is there anyone in the Scotland area that does these back box mods, is there much of a sound difference between this and the back box delete?
Click to expand...

Where are you based? You're more than welcome to hear mine in Edinburgh
 
Chris1981 said:
I've had extensive exhaust work done on my coupe and it's insanely loud... actually it's too loud but it's a lot of fun!! :evil:

I've had the front silencer removed and replaced with a Y-Pipe and a running a very small free flowing back box, it gurggles, pops and bangs and sounds incredible at high revs.... i originally had a much quieter back box with this Y-Pipe system but wasn't happy so got this smaller one made up, the car was so much more responsive after fitting the free flowing box and revs quicker than it did previously! That could just be due to the first box being too restrictive though!
Click to expand...

Got any vids of that exhaust?
 
greg81 said:
redtailed78 said:
Is there anyone in the Scotland area that does these back box mods, is there much of a sound difference between this and the back box delete?
Click to expand...

Where are you based? You're more than welcome to hear mine in Edinburgh
Click to expand...

nice one, I'm in Cumbernauld, we will be heading over to East Fortune at 2 as we are taking father in law to the supercar experience although maybe take the other car if the weather doesn't clear up :thumbsdown:

I'll maybe catch you on one of the upcoming meets :thumbsup:
 
R60BBA said:
Chris1981 said:
I've had extensive exhaust work done on my coupe and it's insanely loud... actually it's too loud but it's a lot of fun!! :evil:

I've had the front silencer removed and replaced with a Y-Pipe and a running a very small free flowing back box, it gurggles, pops and bangs and sounds incredible at high revs.... i originally had a much quieter back box with this Y-Pipe system but wasn't happy so got this smaller one made up, the car was so much more responsive after fitting the free flowing box and revs quicker than it did previously! That could just be due to the first box being too restrictive though!
Click to expand...

Got any vids of that exhaust?
Click to expand...

Nothing I want to upload to the internet really... got an in car video using my phone the mic is a bit shite but you get the gist, I can take a static video later and send you via email/whatsapp, drop me a pm with your email address or number!
 
You must log in or register to reply here.
Back
Top Bottom