 | Home > Puma (Tdci) > Decat - is it worth it? |
 
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731   
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In this case I agree x 10^6! Diesel vehicle taxation here is based on CO2 output... which actually increases with EGR and CATS TÜV/MOT testing here is based on smoke particulates... which aren't reduced by either of the above. So in most situations, insisting on an EGR and CAT in a new diesel car doesn't make sense... especially if you're "into" reducing global warming and saving natural resources! I agree filthy cars pollute the world but there are very few in "civilised" countries and they are generally driven by people who wouldn't care anyway - can you buy MOTs over the internet like doctorates yet? Also, such vehicles are easily spotted at TÜV. It is always at the TÜV's discretion what is roadworthy anyway. Same goes for the police who are always pulling over "smoke factories" from Eastern Europe. Finally - almost all studies on traffic pollution are linked to the dangers of smoke particles (possibly because they are most easily measured). Since our Defenders are checked for smoke, if they pass that test they should be considered "healthy" (which, I would like to believe, most Defender owners care about anyway) Rant over 
p.s. on the subject of lights, I was got into the A2 one night last week to drive home and switched on the lights... or rather didn't  I thought the relay had gone but the main beams still worked. Had to drive home on the fogs (fortunately hardly anyone else on the road). Both  dips had blown at the same time  I can imagine what you guys would have sworn at me  Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing... |
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22nd Oct 2012 5:36pm |
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| The Boy Member Since: 28 Aug 2008 Location: East Northants Posts: 1459  
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No fault codes.
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29th Oct 2012 11:14am |
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| max peck Member Since: 30 Aug 2012 Location: Dubai Posts: 17  
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Cheers mate. All i need to know
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29th Oct 2012 11:24am |
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| tatra805 Member Since: 16 Aug 2011 Location: Dolany Posts: 436  
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Well "mates", this "dude" has no codes also
(couldn't resist, slang on international fora is sometimes provocative, as is humor ) |
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29th Oct 2012 2:26pm |
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| landybehr Member Since: 17 Apr 2013 Location: -D- Posts: 173 |
True, if you don´t look at NOx. The DPF is the latest player in a long chain of effect and side effects in the attempt to reduce the emissions. One thing leads to another. |
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10th Jun 2013 8:59pm |
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| BigWheels Member Since: 21 Mar 2010 Location: Somerset Posts: 1405 
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Could a DPF be fitted to a 2.4 retrospectively, with a remapping if needed? And if so would lower MOT emissions readings qualify for lower VED?
In other words could a 2.4 go 2.2 in all but displacement.....? Land Rover Defenders. 67 years heritage, minimal appearance changes, still going strong all over the world. Not a fashion vehicle, but fashionable to own. Made for the needy, not the greedy. Ta ta Defender |
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10th Jun 2013 9:11pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8026  
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you wont change the VED once its been registered is my understanding and experience. Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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11th Jun 2013 7:50am |
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| wrse92 Member Since: 04 Aug 2013 Location: United Kingdom Posts: 5 
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If I we're to cut the base of the cat removing the pipe would it then come free? or is the removal of the propshaft necessary? Been toying with the idea of a decat for a while but haven't purely due to the fitting! Read a few threads about how people are having a nightmare getting them off.
Many thanks |
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4th Aug 2013 8:12pm |
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| Rakthi Member Since: 30 Nov 2012 Location: Where the cats are Posts: 200 
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When you cut the pipe, you will still have to unbolt the front prop shaft at the differential to get the cat out. It won't come out from the top, too much stuff in the way.
(use a reciprocating saw for cutting the pipe, easy!) Not really that big a deal, just a bit awkward. I suggest you get the special tool for unbolting the prop shaft (and new nuts and bolts). Also mark the position of the prop shaft so you can bolt it back in the same position. Here is the link about the tool: http://www.defender2.net/forum/topic21429.html If you do not remove the cross member under the gear box you will have to buy one of the 2-piece de-cat pipes - Alive sells one with the added benefit of having brackets so you can get the turbo heat shield back on without a problem. The job is definitely worth the effort in my opinion. Seriously reduces the heat in the cabin (I live in the sub-tropics) and the turbo spools up just that bit faster. |
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4th Aug 2013 11:20pm |
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| wrse92 Member Since: 04 Aug 2013 Location: United Kingdom Posts: 5
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Had a look on alive. Never been on there before, some brilliant stuff so will most likely go for the two piece. When its done I assume it'll be worth the work, cant wait for it to be on.
Thanks for the response |
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5th Aug 2013 10:18am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17378 
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This information is often given (and followed) but can anyone explain why? The propshaft is (usually) a balanced unit, balanced during manufacture. The balance of the propshaft does not and cannot affect the balance of any of the rotating components of the drive train. During manufacture, the propshaft is randomly selected from a pile of propshafts and bolted onto the transfer box and diff drive flanges randomly, it is not subsequently balanced, so how it leaves the factory is pure chance. How can it make the slightest difference which way you refit it to the car if removed? (I have never marked a propshaft before taking it off a vehicle, and never had any issues upon refitting, ever. I have removed/refitted a lot of propshafts over the last, er, forty years or so). The situation is very different if you are dismantling the propshaft, I agree. If you seperate the splined joint it is of course essential to reassemble correctly, and if you remove/replace a UJ it is good practice (simply because the shaft is balance after assembly) to maintain balance. But simply remioving and refitting from the car? I don't get it! |
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5th Aug 2013 11:49am |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8026
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i cant, never bothered myself, just refitted them any old how. Cheers James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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5th Aug 2013 9:07pm |
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| Porny Site Sponsor Member Since: 31 Aug 2009 Location: Sutton Coldfield - West Midlands Posts: 809
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Not that easy.... is not just a case of remapping... to do it properly you would need a whole new calibration, proper testing etc etc. And then you need to get to the vehicle offically tested and verified by VCA (goverment agency) to get any benefit - and even then there is little point. It is not just a case of increasing fuel to start and control the burn, there are lots of safety considerations as well. If you get it wrong you have something glowing at 800 degrees in your engine bay... which will lead to a thermal event! Ian IRB The home of the first modified Keswick Green 90 - and the first 2.4 Puma through both the 200bhp and 550Nm barriers. www.IRBdevelopments.com www.facebook.com/irbdevelopments www.integrated316.com www.facebook.com/integrated316 |
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6th Aug 2013 4:43pm |
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| Porny Site Sponsor Member Since: 31 Aug 2009 Location: Sutton Coldfield - West Midlands Posts: 809
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To help turbo control - and longevity. Reducing the back pressure outside of what the standard calibration intended can reduce the life of your turbo, and lead to surging. The problem comes when the ECU is looking at the closed loop and open loop control, and the turbo position is not where it expects it to be - this is more of a problem with electronically controlled VNT's than older fixed geometry turbo's. Reducing and altering back pressure without changes to the ECU calibration is a bit of false economy and can lead to other problems. Ian IRB The home of the first modified Keswick Green 90 - and the first 2.4 Puma through both the 200bhp and 550Nm barriers. www.IRBdevelopments.com www.facebook.com/irbdevelopments www.integrated316.com www.facebook.com/integrated316 |
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6th Aug 2013 4:49pm |
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