Exhaust modification

D

dvd112

Member
:)

Hello all, had my zed up on the ramp today.

I am having the centre scilencer cut out and a straight pipe made all the way to the back box.

The centre box is reasonably small - same ish size as the back box.

Has anyone had the done. Not expecting any performance gains. But hoping it will be a little throatier. Not night and day but more ommph!

It's a 2.0 2015 btw.

Cheers
 
Pre or post facelift? You won't gain much noise but you will get better throttle response on a pre facelift car.

Get one of my modified backboxes :evil:

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=89154&hilit=Backbox

Mike
 
Ducklakeview said:
Pre or post facelift? You won't gain much noise but you will get better throttle response on a pre facelift car.

Get one of my modified backboxes :evil:

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=89154&hilit=Backbox

Mike
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It's an E89 Mike - have you done anything on any of these?
 
its an e89, not many people have fiddled with these it seems. I had a cooper s and a fjcw mini and removed the centre silencer, sound was tremendous. Will see how it sounds, super sprint offer the pipe but at 350 euro c. its a bit pricey!
 
Darkangelv2 said:
Ducklakeview said:
Pre or post facelift? You won't gain much noise but you will get better throttle response on a pre facelift car.

Get one of my modified backboxes :evil:

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=89154&hilit=Backbox

Mike
Click to expand...


It's an E89 Mike - have you done anything on any of these?
Click to expand...



Doh, taking on my phone..

Yes I've done a 23i, let me see if I can find the video.

Mike
 
I literally went to my local power flow place on Tuesday to enquire about this.

They removed a box for me on my old R53 MCS and it was great. For some reason they decided to quote me just shy of £300 to remove the box on my Z4. So I told them to leave it.

Another company has quoted me a touch over £100 and they have an excellent reputation so I may take it there.

I'm worried that the car will become droany.
 
SteveSmith said:
I literally went to my local power flow place on Tuesday to enquire about this.

They removed a box for me on my old R53 MCS and it was great. For some reason they decided to quote me just shy of £300 to remove the box on my Z4. So I told them to leave it.

Another company has quoted me a touch over £100 and they have an excellent reputation so I may take it there.

I'm worried that the car will become droany.
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If the box is completely removed, it WILL drone. When I mod boxes, I ensure that a proportion of the gasses is still routed through the box to ensure there is no drone.

Mike
 
I'm considering a little chop to one of the two 35i back boxes. Mainly to enhance that off stroke sound between the two boxes.
 
dvd112 said:
has anyone done it to an e89 zed 2.0 though
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Mines a 28i but same engine. From my research I couldn't find anything! I've seen some youtube videos of the supersprint and Eisenmann systems, but you need to hear things in real life to know.
 
Smartbear said:
Ducklakeview said:
dvd112 said:
Mike do you have any videos
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There are lots spread through the thread. I'll try and repost them all in one place later.

Mike
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Any exhaust mods to the 2.0 turbo mike?
Rob
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The best mod for your exhaust Rob would be a bigger down pipe from the turbo. And then bigger bore and better flowing silencers. With that and a tune i bet you would get much quicker spooling more torque and power. After turbo restrictions can really cut down on power and how quickly a turbo can spin up.
 
Machine monkey said:
Smartbear said:
Ducklakeview said:
There are lots spread through the thread. I'll try and repost them all in one place later.

Mike
Click to expand...

Any exhaust mods to the 2.0 turbo mike?
Rob
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The best mod for your exhaust Rob would be a bigger down pipe from the turbo. And then bigger bore and better flowing silencers. With that and a tune i bet you would get much quicker spooling more torque and power. After turbo restrictions can really cut down on power and how quickly a turbo can spin up.
Click to expand...

Thanks mat but I meant have you carried out any mods to the 2litre yourself? I'm curious what effect the small front box makes when it's removed/modded?
Rob
 
Depending on its make up there could be a performance gain from removing it. Especially if it hinders flow. The better the flow closer to the turbo the better.

Never done any work to them.
 
I think I'm now committed to going down the dual rear system, 35i style. Not trying to make out it's something it's not, I just prefer that look.
 
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