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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17327

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
To close this thread, I thought the following notes might be of some interest.

1) My thanks to the team at Alive, for stunningly good service! I am not sure who I spoke to (Gary, Alex, or someone else) but they were extremely helpful, and I ordered a front pipe mid-morning on Wednesday, it arrived mid-morning on Thursday, and was fitted by mid-morning on Friday. Many thanks, guys, if you read this! Thumbs Up

2) Replacing the broken cat pipe with a de-cat pipe has made two significant differences. Firstly the noise is quite different. There wasn't much 'leaky exhaust' noise from the engine with the cracked pipe, but there were general 'bag-of-nails' sounds and 'turbo-on-its-last-legs' rattles and whistles which were disturbing. They have now gone, and the engine generally is sweeter-sounding and seems smoother than ever. Secondly the performance from 2500 rpm upwards is transformed - whereas before the engine sounded as though it was objecting to revving to 3000 rpm, and I seldom did so, now it is smooth, sweet, and quiet to 3500 rpm (and possibly higher, but that's not how I drive it). The power is noticeably improved at these engine speeds too, with more power and a smoother delivery.

(Editted for spelling)


Last edited by blackwolf on 1st Apr 2015 9:34am. Edited 1 time in total
Post #412895 1st Apr 2015 8:32am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20292

United Kingdom 
Thumbs Up I have my eye on the Alive exhusts too.

Gary got me out of a hole quick with some EGR problems I had last year too.
Post #412897 1st Apr 2015 8:45am
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
blackwolf wrote:
Replacing the broken cat pipe with a de-cat pipe has made two significant differences.


Would you of got any of the benefits of the de-cat pipe by just replacing a broken cat pipe with a new one though?
Post #412912 1st Apr 2015 9:35am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17327

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
I can well imagine that the noise improvement would be the same, but it is hard to see how the performance increase would have resulted from a cat fitment. it is possible (back pressure and all that) but I doubt it. The performance difference is not earth-shattering but is noticeable.

Ultimately we won't find out until I take the decat off to refit a cat pipe when I find one at a sensible price.
Post #412917 1st Apr 2015 9:39am
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fatman



Member Since: 14 Jan 2014
Location: Athens-Greece
Posts: 126

Greece 2007 Defender 110 Puma 2.4 USW Keswick Green
On my mates stock puma, decat and air intake mod definatly made a difference not a placebo one for sure!
Post #412965 1st Apr 2015 2:16pm
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
K9F wrote:
It was in my view the cheapest performance enhancement and engine protection modification you could do next to EGR blanking.


Thumbs Up

You have removed the 'stranglehold' the cat had on the breatheability of your engine. Still stand by that statement above! If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #412981 1st Apr 2015 4:25pm
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ian series 1



Member Since: 17 Nov 2014
Location: south
Posts: 3127

United Kingdom 2008 Defender 90 Puma 2.4 CSW Bonatti Grey
+1 for cat removal, completley transformed mine Thumbs Up 80" 80" 86" 88" 90"

Wanted, Forward Control Anything considered.
Post #412988 1st Apr 2015 4:37pm
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
Maybe it's just the general age thing but it's only you guys with 2.4s whipping the cats out.
Post #413070 1st Apr 2015 8:48pm
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
TD5s and 2.4s yes cats are easily removed with no complications. 2.2s obviously don't have cats and apart from certain export models of 2.2s that do not have DPFs fitted I've yet to hear of a 2.2 Defender DPF removal in the uk. If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #413085 1st Apr 2015 9:20pm
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
K9F wrote:
2.2s obviously don't have cats


What makes you say that?
Post #413096 1st Apr 2015 9:38pm
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
From the downpipe rearwards the exhausts are exactly the same be it 2.2 or 2.4. The CAT on a 2.4 is not connected to the ECU and as such can be removed without any further implications or affects to the running. The DPF is a completely different kettle of fish.....a DPF is not the same as a Catalytic Convertor.

From the Alive website as an example......

This ALIVE Exhaust System does not come with a Decat Downpipe Section, as the Puma 2.2 TD4 Model is fitted with a Diesel Particulate Filter, which can not be removed.

http://www.alivetuning.com/alive-boutique/...duct_id=83

The difference between a DPF and Catalytic Convertor explained.....

http://filter.ezinemark.com/difference-bet...09b3d.html If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #413274 2nd Apr 2015 6:08pm
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munch90



Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

England 
All or most dpf vehicles have a cat and dpf , most new ones are in one unit , some older vehicles in two separate units

saying that k9f , i knew what you ment Thumbs Up

There are some companys programming out the dpf in the ecu program /map , then you knock the centre out of dpf , not heard of any land rovers being done ( YET !! )
Post #413277 2nd Apr 2015 6:17pm
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
There's a van that conveniently parks outside several dealerships that are very close together near me with advertising on the side stating that they can offer 'a DPF removal service' I was wondering after last year February's MOT legislation regarding Cats and DPFs how their business was affected? Still appear to be parked there most days.

My point regarding DPF/Cat removal on a 2.2 was twofold. Those that do so on a TD5/2.4 find it an easy uncomplicated process. Not so on a 2.2 that's why nobody has done it as far as I know. There was discussion on the forum about the availability of south African ECUs fitting it and just binning the DPF off a 2.2 as a viable option sometime ago. If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #413294 2nd Apr 2015 7:37pm
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T1G UP



Member Since: 08 Dec 2009
Location: Bath
Posts: 3101

England 2011 Defender 110 Puma 2.4 XS CSW Orkney Grey
ignore my PM!

i have a 2.4 with both options of catted and de catted pipe.

2.2 pah!
Post #413296 2nd Apr 2015 7:43pm
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
K9F wrote:
From the downpipe rearwards the exhausts are exactly the same be it 2.2 or 2.4. The CAT on a 2.4 is not connected to the ECU and as such can be removed without any further implications or affects to the running. The DPF is a completely different kettle of fish.....a DPF is not the same as a Catalytic Convertor.


But a 2.2 (UK spec) has both a cat & a dpf.
Post #413406 3rd Apr 2015 7:05am
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