 | Home > Puma (Tdci) > Stainless exhaust decat worth the mod? |
 
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| Pickles Member Since: 26 May 2013 Location: Melbourne Posts: 3783   
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I very much doubt that you will achieve 15-20bhp from an exhaust alone, which is what I'm talking about.
But if your car's been re-mapped, and you're also considering an intercooler, that's all good, then of course there's lots of variables, but even then I cannot see the exhaust giving you those figures. You could do all your mods, put it on the rollers, get your readings, then do your exhaust & see what the result is. From what I've learned, the exhaust on the Puma is already pretty good, ... and that's why many leave 'em alone. Pickles. |
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4th Aug 2016 6:36am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610  
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^^^
Pretty good and many variables is right but it could be better that's why lots don't leave 'em alone, unfortunately it is legislation outside the UK that detailed having a catalytic convertor and subsequently a DPF on later models that strangles the engine for air was compulsory. SA vehicles have no DPF as standard and an ECU to match! In response to your MOT requirement read on! http://www.defender2.net/forum/topic26633....+convertor http://www.defender2.net/forum/topic26560....+convertor http://www.defender2.net/forum/topic28888....+convertor 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!! Last edited by K9F on 4th Aug 2016 10:26am. Edited 2 times in total |
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4th Aug 2016 10:00am |
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| Pickles Member Since: 26 May 2013 Location: Melbourne Posts: 3783
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Ain't reading anything,....just tell me the facts, in your words....that'll do me.
Pickles. |
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4th Aug 2016 10:24am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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Decatting and removing the rear box on mine gave me an engine running temperature drop of 8-10%, heat dissipated much quicker too. This was accurately measured with a Scangauge II fitted before during and after.
More lower end torque (not measured as I read up on the benefits and experience from many others) I felt no real urgent need or requirement to pay to get it dynographed afterwards to appease any sceptics, scoffers or scorners as I was happy with the results. But I bet someone does have the figures somewhere perhaps? 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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4th Aug 2016 10:27am |
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| Pickles Member Since: 26 May 2013 Location: Melbourne Posts: 3783
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No problem with any of that whatsoever.
I'm simply saying that in IMHO, there are are no appreciable power/torque gains to be made. I understand that the engine may sound different, it may even "feel" different, but I have never, ever, seen an exhaust on a Puma that, stand alone, has ever made an appreciable difference on the dyno, and certainly not in the region of 15-20hp, which is what our friend is looking for. For sure, the combination of an ECU upgrade, intercooler, will give appreciable gains, in fact I've seen 'em all on this forum, but most of 'em haven't touched the exhaust, 'cause it's pretty good as it is. Pickles. |
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4th Aug 2016 11:05am |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127 
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I have to say I removed my Cat and centre box on my 2.4 and the difference was quite something!
Before, the temp needle sat half way, now sits well under half. The land rover has been more responsive on exceleration , more free revving, and as previously said the turbo seems to spool up quicker, and you get some awesome sounds 
We run a fleet of defenders, and none sound or go like mine in their standard form. If I were to get another, my first mod would be to ditch the cat! I'm not sure of the facts and figures of power gains/losses etc But it did make one hell of a difference that's for sure. I simply cut the cat out and replaced with a 2 1/2" straight pipe. The puma sounds good when it's able to breathe. Seems to me they are heavily restricted. 80" 80" 86" 88" 90" Wanted, Forward Control Anything considered. |
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4th Aug 2016 11:26am |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20300
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Talking of running temp, using a high quality coolant also is good! OAT is supposed to have a 5yr life but changing before is beneficial. Now, it's either because I fitted a new Waterpump or coolant or both - but previously running tell on gauge was bang on half. Post new Waterpump and Inugel Optimal pre mix* coolant its sitting at just below. If I had an ultra gauge I'd say running a degree or two cooler about optimum temp. Anyway back on subject. What sort of price are we talking for the 'horse dentists' exhaust? 
Or is that classified info? And if do could someone please 'PM' me.... I have been interested in Alive's for a long time, however, at nearly £600 I never proceeded as I couldn't justify that.. I'm assuming reading through this thread that this one is somewhat cheaper. I currently have standard system with TF centre straight through, it's okay but a poor fit.... I'd probably be myself looking at CAT back, personally I wouldn't remove the CAT but that's due to personal choice. Suppose if you ran a good fuel additive with tangible results CAT removal could partially be counteracted by that. Not so sure on particulates though. |
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4th Aug 2016 12:10pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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Hi Steve,
I bought my Griffin so long ago publishing or giving you a price would be pointless. Nevertheless going on prices at the time the Griffin was approximately 35-40% cheaper. Argumentatively the Alive one may have been 'made better' with flanges in lieu of slip joints but at the end of the day what is it for? If it has a lifetime guarantee and puffs out what it needs to without leaks what price do you put on for flanges? Pickles I agree but for the minimal outlay for a decat and the fact engine temperatures are lower (which is always a good thing) BHP overall may not increase but the torque curve IMHO certainly does with the turbo spooling up quicker due to less restriction, it is still the most cost effective and significant engine 'enhancement' you may wish to consider? (Not you personally of course). Most if not all tuners used to sell the decat as part and parcel of a tuning package anyway. Alive and Rovertune certainly did! 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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4th Aug 2016 12:27pm |
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| bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1913  
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Ian mirrors exactly what every one states, a noticeable difference!
TBH I am not doing it for the gain as such but just want to let the engine run that bit better and have a nicer sound  i plan on keeping this defender for a very long time, so working out what is beneficial and prolongs the life of the engine etc.
 2016 Range Rover Autobiography 4.4 TDV8
2010 110 XS Utility 2.4TDCI 2010 Range Rover Sport TDV8 (gone) 2007 Discovery HSE TDV6 (gone) 1993 110 csw 200 tdi (gone) 1994 90 HT 300 tdi (gone) 1994 discovery 300tdi (gone) 90 hybrid 3.5 v8 (gone) Range rover bobtail 3.5 v8 (gone) |
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4th Aug 2016 1:03pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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A 'noticeable difference' is bang on the nail. Lower running temperatures speak for themselves adding a larger intercooler improves matters even further and either both as a combination or singularly will certainly prolong engine life and produce a more effective fuel burn too with the engine being cooler. 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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4th Aug 2016 1:25pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127
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Forgot to mention I'm running larger intercooler too! 80" 80" 86" 88" 90"
Wanted, Forward Control Anything considered. |
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4th Aug 2016 2:11pm |
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| Pickles Member Since: 26 May 2013 Location: Melbourne Posts: 3783
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All is good, a good honest discussion should never hurt anyone.
Pickles. |
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4th Aug 2016 10:47pm |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568
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Plus one Ian! Every change I made intercooler, Decat centre box, map evan the air box mod could be felt. The thing ran cooler in the heat, better especially with the 82deg thermostat. I must agree they are heavily restricted.
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5th Aug 2016 1:39am |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127
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I've not looked into the air box mod yet.
Is it worthwhile? 80" 80" 86" 88" 90" Wanted, Forward Control Anything considered. |
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5th Aug 2016 6:23am |
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