 | Home > Puma (Tdci) > decat and centre box removal does it affect the turbo |
 
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| Anderzander Member Since: 08 Feb 2011 Location: Lancashire Posts: 1000  
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If anything it will spoil faster with the decrease in back pressure.
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10th May 2015 4:18pm |
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| Anderzander Member Since: 08 Feb 2011 Location: Lancashire Posts: 1000
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Oops - auto correct got me and I can't edit on the mobile site --- spool faster - not spoil
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10th May 2015 4:18pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610 
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Plenty of information already available, here's a starter......
http://www.defender2.net/forum/topic7482.html?highlight=spool 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!! |
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10th May 2015 4:27pm |
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| Lorryman100 Member Since: 01 Oct 2010 Location: Here Posts: 2686 |
There is not much of a difference from having the CAT removed to having one fitted, source a renowned tuner.
So much so I got a new CAT from Dan at Duckworth parts and it is going onto my Puma next week. The main reason is the acrid stink from the exhaust fumes that the CAT filters out. JMTW  |
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10th May 2015 4:32pm |
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| Likeomg Member Since: 29 Jun 2012 Location: Lake District / Newcastle Posts: 2640 
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i prefer not having one, it does make the turbo spool quicker and sounds meatier.
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10th May 2015 4:49pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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^+1 but rearbox instead of centrebox. Differing opinions but glad I did it.
Noticed the difference on mine straight away. 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!! |
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10th May 2015 5:15pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127 
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^^^^^^^what he said^^^^^^^
80" 80" 86" 88" 90"
Wanted, Forward Control Anything considered. |
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10th May 2015 5:20pm |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568 
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I noticed two things once the cat and centre pipe were removed. First the engine had more power and spooled up much faster, secondly a huge reduction in heat in the cabin. On long trips +1000 mile no power drop due too heat. It seems too me that the exhaust heat can now flow away from the vehicle/engine which is all good!
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11th May 2015 1:37am |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2638  
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I removed the cat on mine, noticed turbo spooling up much quicker.
Will also remove the centre silencer box, noticed lot of heat coming through on a recent trip in high ambient temps (34C) -- 2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged 
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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11th May 2015 5:22am |
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| Egghead Member Since: 25 Nov 2012 Location: Surrey Posts: 255 
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Heat killed my manifold and turbo
 both were cracked! ££££  Since removing cat and centre silencer the engine has been nice and smooth, it sounds rather nice, and my cab has been cooler too. Engine now remapped and EGR disabled. From a cold start the diesel smell is a bit stronger and the soot deposits around the exhaust exit are blacker these days but at least that  isn't going back into my engine anymore. |
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11th May 2015 9:23am |
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| Lorryman100 Member Since: 01 Oct 2010 Location: Here Posts: 2686 |
I have tons of engine live data taken from my Puma with the decat fitted with an Alive stage 2 remap. I am planning to take more live data with the cat refitted. Once the mot is done in September I will base the two sets of live data on whether to keep the cat or refit the decat.
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11th May 2015 7:29pm |
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| st86 Member Since: 16 Apr 2015 Location: Yorkshire Posts: 11  
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Hey guys thanks for all the responses definitely thinking ill do the decat now before i take it to bas for a remap do they still go through the emissions test for the mot without the cat and egr disabled?
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11th May 2015 7:48pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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No emissions check for diesel as such , only smoke test for mot at the moment
only visible check for cat for mot , if you get a switched on tester without a cat is a fail |
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11th May 2015 7:52pm |
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