Its not that I think that Land Rover are perfect in everything they do, possibly not even in anything they do, but presumably the original mapping with which they send out their cars is a carefully-chosen compromise between power output, fuel economy, engine longevity and exhaust polution. I assume that remapping changes the relationships within that compromise. So presumably if you want the engine to produce more power it will be at a reduction in fuel economy and engine longevity, and an increase in polution - there is, after all, no such thing as a free lunch.
Therefore any claims that remapping can give more power AND less fuel consumption must be false.
But the computer could be remapped to give more power and worse economy (and probably less engine/component life and more polution).
And it could also be remapped to give more economy and less power (and probably longer engine/component life and less polution.
Please, all of you with more expeirence than I of mapping computers for engines or using remapped engines, am I right or am I wrong? (Yes, you guessed, I am old and the engines I grew up with had adjustable carburetters, for example.)
You see, I have driven a P38 Range Rover for over 10 years and so I find the Disco 3 exhilaratingly powerful as supplied by Land Rover, but I find it depressingly thirsty for fuel. Could I get it remapped to reduce the power and increase the economy?
Or is it just cheaper and more flexible to develop a lighter right foot and dance gently on those pedals?
28th Mar 2010 9:06 pm
pom
Member Since: 10 Feb 2008
Location: Worcestershire
Posts: 1790
its a 2 ton brick what do you expect ?
Amazes me people buy these and then expect ford focus MPG.
Pom
28th Mar 2010 9:08 pm
jum649
Member Since: 21 Feb 2010
Location: Herefordshire
Posts: 331
Experience says that in normal driving you can sometimes be working more efficiently with a remapped engine if you can avoid unleashing those extra horses. I know it seems contrary to common sense, but you can have more power when you want, and better mpg if driven reasonably and not using the extra all the time.
28th Mar 2010 9:12 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
A remap on a 2.7 gives you 3.0 performance, also makes power delivery smoother and you loose that annoying take off throttle lag. If you don't use the performance increase you gain on the economy. Try a remap on a "try before you buy" basis, you'll understand.
28th Mar 2010 9:18 pm
jimbo23
Member Since: 04 Jan 2009
Location: salisbury
Posts: 262
I have done remapping on agricultural engines, (not a D3 but principle is the same) They are tested before and after on a dyno and they produce more power and use less fuel remapped, of course if you drive it like a idiot all the time fuel consumption will suffer.
Alot of the engines are the same that i work on, A 6.8 litre common rail engine some produce 150hp others just over 300hp only difference is the ECU mapping
28th Mar 2010 9:23 pm
grzesiul
Member Since: 11 May 2008
Location: UK
Posts: 6266
remap is just the beginning
next come large bore exhausts huge intercoolers air filters and all
to make the beast fly low
I can seriously say my remapped Disco is Phenomenal!!
I missed it like mad when my 15k service turn it off,due to a suspension upgrade...now its back!!
I still get abit of lag ,but at 2k revs .....wow !! I am still every time i drive it ...The missus never gets to drive ,even though i drive 600+ miles a week!!
Happy days.
28th Mar 2010 9:30 pm
Iain G
Member Since: 31 Jan 2009
Location: Filey
Posts: 430
So why didn't LR produce the vehicle with the mapping that DSL / jum649 implies.
Is it tweaked in favour of how the vehicle would be pushed during a VOSA effiecincy test?
28th Mar 2010 9:32 pm
dick dastardly
Member Since: 29 May 2007
Location: wiggleigh bottom
Posts: 1112
Apparently the argument is that the standard map is a compromise with a wide fuel tolerance for the world market. A tune is for the better quality fuel in europe. increasing injected fuel, turbo boost pressure and timing all makes a bigger bang which delivers more torque and power. the auto gear box then changes up more quickly delivering a net fuel saving. it will also produce higher temperatures per detonation and so produce more NOx pollutants.
more mpg almost always comes with more power / torqueThere's one wheel on my wagon, but i'm still rollin' along, it's the cherokee, they're after me, but I'm singing a happy song
28th Mar 2010 9:34 pm
jimbo23
Member Since: 04 Jan 2009
Location: salisbury
Posts: 262
As DSL says try a remap, I wouldnt waste your time with the cheap plug and play chips if you want extra power remap is the way to go
I don't expect Ford Focus economy, that would be naive and I may be old but I don't think I am naive.
However, the P38 Range Rover was also a 2 ton brick with a significantly older design of engine. But that could reliably do 4-5mpg better than the Disco 3 when driven in the same restrained manner.
Why?
What the P38 couldn't do was pick up its skirts and go like the Disco can.
But I can choose not to make it do that. Its nice to have it when you need it, though.
Don't forget that the standard vehicle is designed to operate over a wide range of conditions, including temperature, altitude, and to operate lightly laden, or with a full payload and trailer.
If you can narrow the "windows", you can bias performance accordingly. I am happy to accept reduced performance at height over say 2,000 feet ASL - the highest road in the UK is the Cairnwell pass between Blairgowrie and Breamar Glenshee Ski centre) @ 2,199 feet.
Likewise I won't be towing a heavy trailer.
My ECU can be remapped to take advantage of this.... someone with more technical knowledge will no doubt explain.
NJSSAm I Gammon or Woke ? - I neither know nor care.
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.
28th Mar 2010 9:45 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
I've got Torq Tune on mine & TurboChip on SWMBO's and well pleased with both, equally lots of peeps have good things to say re the BAS remap which is removable. Never had any issues with the non removable remaps but some prefer to take it off before it goes to the stealers. Don't understand personally as most stealers offer remaps of one type or another.
As jimbo says, go for a proper remap, not a cheap box that just boosts the fuel pressure.
28th Mar 2010 9:46 pm
Jem
Member Since: 02 May 2009
Location: Yorkshire
Posts: 59
Hi Guys
Can I just ask... Would a remap affect your insurance?
Also, who's best to contact for getting a good job done?
My LR warranty expires at the end of May and i'm going to take out an extended warranty, probably with Warrantywise, would the remap need to be declared to them to avoid any payment of claims?
Cheers
Jem
29th Mar 2010 4:55 am
raftrey
Member Since: 29 Oct 2006
Location: wigan
Posts: 59
Why has no one commented on the 'component longevity' part of the question?
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