 | Home > Maintenance & Modifications > Long term effects of remapping/vnt turbos |
 
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| Lorryman100 Member Since: 01 Oct 2010 Location: Here Posts: 2686  |
You don't need a remap to get a leaking exhaust manifold. A couple of members on here have had issues with blown and warped turbo flanges and don't have a remap. The companies who supply these remaps (I'm talking Alive and BAS here) balance everything to give you a safe remap, remember the average basic remap only gives between 25 and 30 bhp increase. The engines OEM map file is in place to take account of Euro emissions and mpg, bhp etc. The engines are basically de tuned to get them through the stringent emission laws we have Brussels to thank for. Other considerations are wear on gearboxes and running gear, the extra fuel use due to your right foot and subsequent big grin the remap gives you.
Just my tuppence worth 
Brian. |
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5th Nov 2011 4:43pm |
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| Steve B Member Since: 22 May 2009 Location: Warwickshire Posts: 586  
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Hi,
Depends on the state of tune, more power=less life Although that is not strictly true  I wonder how many tuners measure cylinder pressure during their remapping? None at a guess. If you remap an engine and increase the cylinder pressures to dangerous levels then sure you are going to have problems.
I am not too hot on diesel engine tunes but I guess if you are well into the smoke point with too much fuel the the cylinder pressures are going to go up. On petrol engines we fit pressure transducers into the combustion chamber so we know exactly what is going on. Also depends on the engine, with all its problems aside once these have been addressed the TD5 looks like it handles a large increase in power without problems. Figures of well over 200bhp have been quoted but for long term reliability I would probably limit the power to somewhere between standard and max available. 170-180bhp for a TD5? My friend who have a factory tuned L200 mitsubishi has just had a head gasket failure at 40,000mls. And reading the internet this is common. It will be interesting to here from someone who really knows their stuff 
Steve  |
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5th Nov 2011 4:44pm |
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| Lorryman100 Member Since: 01 Oct 2010 Location: Here Posts: 2686 |
The thing is with the duratorq engine you are limited by how much fuel pressure is available at the rail due to the pressure limiting valve activating at 1800bar. So with a working pressure of 1600bar there is not a lot of room for tweaking and this is why generic remaps fall flat on there face next to a personal remap from a LR dedicated tuning company. When I had a few maps from Gary you could see the proof of the pudding displayed on the live data, the factors that had been changed and by what amount. Also add in a EGT reading for each map then you see the negligible differences in the standard tune and the remapped file. As to smoking, if the boost pressure matches the fuel pressure then it won't throw out black smoke, only over fuelling causes this and it is common with generic plug in remap boxes as they only boost the rail pressure without taking any other factors into consideration. I too had a Mitsubishi factory power upgrade in my Shogun and that was a Ralliart plug in module which made the shogun smoke like a tyre fire under heavy acceleration. It came out soon after I noticed the smoking and higher fuel use.
Brian. |
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5th Nov 2011 5:00pm |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443  
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I had my TD5 2002my remapped just over 2 years ago, I've done close on 40k miles since the remap which was a stage 1 and it was measured at 173hp. Apart from oil in the injector harness and injector seals I've had no issues with it. The seals and oil in the loom are common faults whether remapped or not, the trucks life is varied, I offroad with my local club, it's used for work round a farm, towing anything from a caravan to a 2,9tmini digger(which with trailer is hovering around the max weight anyway
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I'm sure the techies will be able to say more but one of these days I shall be looking into a stage 2 with no qualms at all, as long as it is done by a reputable company. |
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5th Nov 2011 5:05pm |
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| wslr Member Since: 18 Jul 2010 Location: Wellington, Somerset Posts: 581
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I think mapping combined with certain hardware add-ons actually extends the life because the engine runs cleaner and more efficiently. Also, people who take an interest in these things are more likely to change the oils sooner and use better quality lubricants, again extending life.
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5th Nov 2011 6:00pm |
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| yobbie Member Since: 15 Nov 2010 Location: Isle of Wight Posts: 711 
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I've got a VNT with a stage 2 remap large intercooler etc (IRB) around 190bhp, had it around 14 months. I can't say I get anymore smoke than standard. Its done nearly 100,000miles with regular oil changes, but 'touching wood' haven't had any problems.
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5th Nov 2011 6:43pm |
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| iandup77 Member Since: 18 Aug 2010 Location: Dar Es Salaam,Tanzania Posts: 15 
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Hi all. I had a remap for 3 years on my Defender Puma. In the 3 years I have done 50 000km . it started to smoke badly when goeing uphill during a road trip. On our way home a knock came from the engine almost like a diesel knock. To make a long story short piston 4 and 2 seized due to overfeuling. Costing me so far $8000.00 for a new top and bottom.
 To be honest I am now put of from any type of remap. My advice dont do It On a quite night in Africa you can hear the sound of rusting Land Cruisers |
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10th Nov 2011 2:39pm |
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| JSG Member Since: 12 Jul 2007 Location: Berkshire Posts: 2412 
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Who did your remap? John http://www.hampshire4x4response.co.uk 2011 Tdci 110 CSW XS |
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10th Nov 2011 2:42pm |
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| T1G UP Member Since: 08 Dec 2009 Location: Bath Posts: 3101 
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every vehicle i've owned has been modified in some whay or another. I've never blown an engine up, blown a headgasket or thrown a rod.
BUT i warm them up, taking it easy when cold, cool them down after a blast and keep ontop of servicing,leaks and other issues that can bite you in the ass when you don't need the hassle. So a remap and a VNT will be making its way onto my defender. |
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10th Nov 2011 2:46pm |
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| iandup77 Member Since: 18 Aug 2010 Location: Dar Es Salaam,Tanzania Posts: 15
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@JSG. The company that did mine is called Turbochip in South Africa. On a quite night in Africa you can hear the sound of rusting Land Cruisers
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14th Nov 2011 2:33pm |
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| DefenderOfTheEarth Member Since: 09 Nov 2010 Location: Cornwall, UK Posts: 1304 
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I think some people swear by them, some don't trust them.
I'm in the latter camp. IMO Defender gearboxes and clutches fail enough without even more stress! BM is easy to up to slightly mad power and torque too but IMO the drivetrain is already under enough stress. If you're a short term car owner, fine, if you keep your vehicles for ages, maybe leave as standard. Defender 110XS SW gone... now VW California 180 4 Motion. |
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14th Nov 2011 3:05pm |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731  
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Well, most of that sounds nice and positive
Just as well - I'll be using my ATRIC for the first time very soon 
Wish me luck! p.s What's a VNT (please excuse my ignorance) 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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14th Nov 2011 3:07pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7687 
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VNT - variable nozzle turbo
VVT - variable van turbo Cheers James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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14th Nov 2011 4:05pm |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443
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After spouting off earlier, I spent Friday replacing manifold studs after finding 3 snapped
 Looks like one of them had been snapped for a little while, the third one finally snapped when it saw the socket  |
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14th Nov 2011 4:24pm |
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