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Dexterdog



Member Since: 23 Jun 2018
Location: gloucestershire
Posts: 32

Exhaust upgrade

Hi,

This is just about getting a better sound out of my 2.4 tdci.

I have looked for various videos on you tube to try and find out what its likely to sound like. I have also phone Alive an Twisted

Alive suggest a decat system.
By contract twisted suggest a single silencer system that fits in behind the decat and then flows straight through - their advice is the turbo will overspool if you decat.

Can anyone advise please.......

Does decatting enhance or lessen the turbo (sppoling more freely or overspooling) ?

On various videos you can hear a "blowvalve" type sound (darth vadar noise) when you come off the accelorator. From the titles it seems this is only on the decat videos. Is that "blowvalve" type sound the result of decatting ?

Cheers

Post #749803 7th Jan 2019 7:32pm
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Bergos



Member Since: 08 Aug 2015
Location: Somewhere in Portugal
Posts: 85

Portugal 2007 Defender 110 Puma 2.4 HT Keswick Green

My advice? Buy a Honda Civic and go for Mugen.

Sorry for being ironic. Bergos

LR Defender 110 HT 2007 (2.4 Puma)
https://www.facebook.com/LR.Wanderlust/

Post #750067 8th Jan 2019 8:22pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 3328

2006 Defender 110 Td5 USW Zermatt Silver

I’ve tried a few systems, Tdci, and Td5. You get much better sound and performance from a decat.

Andy.

Post #750092 8th Jan 2019 9:43pm
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hornet



Member Since: 04 Jan 2010
Location: Western Europe
Posts: 168

Re: Exhaust upgrade

Dexterdog wrote:

Can anyone advise please.......

Does decatting enhance or lessen the turbo (sppoling more freely or overspooling) ?
Cheers


I only removed the cat (straight through tube, DA4359) and left both silencers. All in all the engine has become more agile, the sound hasn't changed. Also the exhaust temperatures should drop a bit.
Since the vehicle is also on the road as EURO 2 version with exactly this constellation, I think the overspeed discussion is total nonsense.

Post #750292 10th Jan 2019 9:51am
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Likeomg



Member Since: 29 Jun 2012
Location: Lake District / Newcastle
Posts: 1980

2010 Defender 90 Puma 2.4 HT Stornoway Grey

This is mine...






On my big noisy car, removing the secondary cat's also made a huge difference. and this was an already shouty 600hp naturally aspirated v12.

Post #750298 10th Jan 2019 11:17am
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hornet



Member Since: 04 Jan 2010
Location: Western Europe
Posts: 168

Qestion: Decat and no silencers at all? And what is the main difference between file 1 and file 2 in hardware, the second one is missing the spool sound a bit...

I really like it, but that spool-sound when lifting the foot is annoying

Post #750311 10th Jan 2019 1:25pm
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Likeomg



Member Since: 29 Jun 2012
Location: Lake District / Newcastle
Posts: 1980

2010 Defender 90 Puma 2.4 HT Stornoway Grey

Decat with if i remember correctly one silencer box,

the spool sound is a standard turbo, you don't get it with the hybrid turbo setup..

Post #750314 10th Jan 2019 1:39pm
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custom90steve



Member Since: 21 Jan 2010
Location: South West England
Posts: 16504

United Kingdom 2007 Defender 90 Puma 2.4 SW Stornoway Grey

I'm guessing that's the Alive exhaust? Watts ÷ Volts = Amps.
Amps X Volts = Watts

Post #750360 10th Jan 2019 4:23pm
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Likeomg



Member Since: 29 Jun 2012
Location: Lake District / Newcastle
Posts: 1980

2010 Defender 90 Puma 2.4 HT Stornoway Grey

Hi, yeah.

Post #750409 10th Jan 2019 8:12pm
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custom90steve



Member Since: 21 Jan 2010
Location: South West England
Posts: 16504

United Kingdom 2007 Defender 90 Puma 2.4 SW Stornoway Grey

Thought so, I've had my eye on it for years but can't stomach the price really... for now.. Laughing

Thumbs Up Watts ÷ Volts = Amps.
Amps X Volts = Watts

Post #750413 10th Jan 2019 8:17pm
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discomog



Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 1236

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Santorini Black

Why would anyone want their Defender to sound like a teenager's Seat Ibiza or Vauxhall Corsa? Santorini 90XS SW
Discovery Sport
Morgan Plus 8

Post #750498 11th Jan 2019 9:00am
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Likeomg



Member Since: 29 Jun 2012
Location: Lake District / Newcastle
Posts: 1980

2010 Defender 90 Puma 2.4 HT Stornoway Grey

To be honest, when i bolted my alive system on i was still a teenager so.............

Also it's hardly anti social, just a bit more raspy than the standard exhaust, also some performance is gained.

Post #750500 11th Jan 2019 9:11am
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LR Sam



Member Since: 08 Nov 2012
Location: Yorkshire
Posts: 133

England 

Dexterdog - I have a twisted full exhaust system on a 2.4 - this is a decat system so instead of a cat converter it has been removed but instead of a straight bit of pipe it has a silencer in its place - hence passing an MOT as it visually looks like a cat is there. This gives some back pressure for the turbo to spool up and then allows no restriction from there all the way back. I love it.

From looking at alives website - there's is just a back half system so leaves the cat in place (in the front pipe from the turbo).

The other option if you want to decat is simply buy a cheap front pipe without the cat so straight through. But you will still have the other silencers in the exhaust (one in the tail pipe and one in the centre pipe from memory).

So it is up to you what you go for but varying options and expense

Obviously removing your catalytic converter is illegal before someone else mentions

Post #750505 11th Jan 2019 9:57am
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Roy5695



Member Since: 15 Feb 2014
Location: Cornwall
Posts: 622

United Kingdom 2011 Defender 110 Puma 2.2 XS DCPU Indus Silver

This is the Alive system for a 110. It leaves the factory cat/DPF in place. But if you speak to Alive they will supply a decat pipe on top of this giving you the full system.


Click image to enlarge
 2011 Defender DCPU 2.2

Instagram - www.instagram.com/royljprice/

Roy

Post #750523 11th Jan 2019 12:18pm
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Zed



Member Since: 07 Oct 2017
Location: In the woods
Posts: 1022

United Kingdom 2010 Defender 110 Puma 2.4 XS CSW Santorini Black

discomog wrote:
Why would anyone want their Defender to sound like a teenager's Seat Ibiza or Vauxhall Corsa?


Loud exhausts on really slow motors make me laugh.

Post #750532 11th Jan 2019 1:07pm
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