Peter James
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No. My question was about fuel consumption. Your reply was about limiting speed.
(with a diversion about remaps/chipping)
Tuning Just had our camper 'remapped'
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Tuning Just had our camper 'remapped'
No. My question was about fuel consumption. Your reply was about limiting speed.
(with a diversion about remaps/chipping)
however speed and fuel consumption goes hand in hand
Peter James
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OK I'll see if I can explain it a bit more simply. We all know limiting speed tends to reduce fuel consumption. But we don't need a chip or remap to limit speed on our own vans. We can do that ourselves. Commercial fleets probably don't neeed extra speed limiters either because many will have tachographs which will indicate the vehicles speeds.
What I was trying to suggest was since AlunL deals 'with many other couriers, some with large fleets' he could ask them whether they have saved any fuel through chipping/remapping, apart from simply by limiting speed.
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Most don't have Tachos, that's for over 3.5t (at the moment). That's why limiting the speed to 70 is the preferred route...
Anyway, I'm giving serious consideration to chipping/tuning box on my van...
https://www.fiatforum.com/ducato/287481-what-your-mpg-2.html
https://www.fiatforum.com/ducato/287481-what-your-mpg-2.html
OEM are pressing against tuning of their ECU software, maintaining that it is their property, regardless of the vehicles sale.
http://www.the-ace.org.uk/stricter-mot-test-from-2012.html
Re: common sense please
I have.
I had my Stilo remapped specifically to make it run better using 100% Bio-Diesel.
The side effect(for me) of this is performance, the car has a significant increase in power, the difference is easily felt when accellerating hard in 3rd and 4th gears.
I have.
I had my Stilo remapped specifically to make it run better using 100% Bio-Diesel.
The side effect(for me) of this is performance, the car has a significant increase in power, the difference is easily felt when accellerating hard in 3rd and 4th gears.
if you wrap a car instead of spraying it still stays same colour on v5 as wrap is classed as temporary, so may not affect insurance
Peter James
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Thats a neat trick. At the same time as re mapping your ECU they re map your miles per gallon meter.
No i don't know much about remapping. But I know enough about the Rooad Haulage industry to know they would all have it f it delivered the fuel savings claimed.
Sometimes a little knowlege is a bad thing;
A understands nothing about tyre pressures so he follows the manufacturers recommendations.
B understands a little - just enough to know that the harder the wheels, the less rolling resistance, the better fuel economy, the faster the speed. So he blows his tyres up rock hard. If they don't burst they shake him or his vehicle to bits.
No i don't know much about remapping. But I know enough about the Rooad Haulage industry to know they would all have it f it delivered the fuel savings claimed.
Sometimes a little knowlege is a bad thing;
A understands nothing about tyre pressures so he follows the manufacturers recommendations.
B understands a little - just enough to know that the harder the wheels, the less rolling resistance, the better fuel economy, the faster the speed. So he blows his tyres up rock hard. If they don't burst they shake him or his vehicle to bits.
Thats a neat trick. At the same time as re mapping your ECU they re map your miles per gallon meter.
That's why I use an app on my phone (and before that a pencil and calculator) to check my MPG... They are at best a rough guide and at worst, complete liars!
So Peter, whats that you are saying about tyres? I always stick to the recommended pressures (depending how heavy my load is); should I give them more air? Should I vary it during warmer/colder climates?
Peter James
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If you are running at the same weight all the time I would suggest you weigh your axles and then inflate the tyres to the pressures recommended here http://www.tyresafe.org/images/tyre-safety-guide/motorhome-leaflet.pdf
But I was just trying to say that most things with a vehicle are a compromise. Someone may know something that makes one thing better, but doesn't know it makes another thing worse. So somebody who only knows a little, (as in some remappers perhaps) can be more dangerous than somebody who knows nothing and so leaves it alone.
But I was just trying to say that most things with a vehicle are a compromise. Someone may know something that makes one thing better, but doesn't know it makes another thing worse. So somebody who only knows a little, (as in some remappers perhaps) can be more dangerous than somebody who knows nothing and so leaves it alone.
So Nick, are you saying that the MPG calculator does not use the updated injector opening times? I'd have thought that it would need these values, plus the fuel rail pressure reading, to have any chance of a meaningful calculation.
Surely it doesn't use it's own independant lookup. That would seem to be a very strange strategy to adopt.
Surely it doesn't use it's own independant lookup. That would seem to be a very strange strategy to adopt.
even on a new unmapped car the mpg on the dash is only a guide, to find out real mpg you need to do the brim tank method
I'm who Nick is talking about.
I asked him to take a look at a MAP I'd been given in exchange for an hours work solving an airbag issue.
While I was impressed with the extra power the MAP gave me I was unsure of its quality so I asked Nick for his opinion.
The MAP did what it was supposed to do, gave me more power, BUT, the way it produced that power was completely wrong.
Even though the cars computer said I was getting 48mpg average, I knew it was no where near that because of the amount I purchased weekly at the pump.
I knew something wasn't right, Nick explained in detail what was wrong after viewing the MAP I'd been given and then supplied me with another MAP he personally had created.
After a few hours of testing and tweeking on a local dual carriageway the performance of my Stilo was very impressive thanks to Nick.
Nick is very knowledgeable and more than willing to explain exactly whats going on with your car, before, during and after he remaps it.
I've been very interested in "how and why" remappers do what they do but this is the first time anyone has freely given me hours of their time to help me understand exactly whats happening to my car.
I class myself as having a very good basic knowledge of how my car works but thanks to Nick I now have a much better understanding and a car that performs twice as good as it did a few days ago.
Nick, I hope one day to be able to understand remaps as you do, I'm in awe of your skill mate. :worship:
From personal experience you'll not find a better person to remap your car so listen and learn while you have chance.
I asked him to take a look at a MAP I'd been given in exchange for an hours work solving an airbag issue.
While I was impressed with the extra power the MAP gave me I was unsure of its quality so I asked Nick for his opinion.
The MAP did what it was supposed to do, gave me more power, BUT, the way it produced that power was completely wrong.
Even though the cars computer said I was getting 48mpg average, I knew it was no where near that because of the amount I purchased weekly at the pump.
I knew something wasn't right, Nick explained in detail what was wrong after viewing the MAP I'd been given and then supplied me with another MAP he personally had created.
After a few hours of testing and tweeking on a local dual carriageway the performance of my Stilo was very impressive thanks to Nick.
Nick is very knowledgeable and more than willing to explain exactly whats going on with your car, before, during and after he remaps it.
I've been very interested in "how and why" remappers do what they do but this is the first time anyone has freely given me hours of their time to help me understand exactly whats happening to my car.
I class myself as having a very good basic knowledge of how my car works but thanks to Nick I now have a much better understanding and a car that performs twice as good as it did a few days ago.
Nick, I hope one day to be able to understand remaps as you do, I'm in awe of your skill mate. :worship:
From personal experience you'll not find a better person to remap your car so listen and learn while you have chance.
Peter James
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I can get that going downhill with the wind behind me
Incidentally this is what the British Tyre Manufacturers Asosiation has to say about Nitrogen Tyre Inflation http://www.btmauk.com/data/files/Nitrogen_as_a_Tyre_Inflation_Medium_31_May_2011.pdf
this site offers Economy Tuning http://tuneitup.vpweb.co.uk/
I am allowed to post link because i dont work there, it was needed because some may have thought you cant map for more mpg
As Nick said the MAP(s) he supplied me with will deffinately give better economy than my previous map because the previous MAP I installed was a bad one.
However, I don't think a remap would be able to produce better MPG than the standard manufactures MAP if your car is well maintained, correct tyre pressure, good oil etc. I don't see how a remap could result in better MPG unless the amount of fuel the engine uses is reduced some how, can a remap increase the engines efficiency, burn fuel more effectively, meaning it uses less?
However, I don't think a remap would be able to produce better MPG than the standard manufactures MAP if your car is well maintained, correct tyre pressure, good oil etc. I don't see how a remap could result in better MPG unless the amount of fuel the engine uses is reduced some how, can a remap increase the engines efficiency, burn fuel more effectively, meaning it uses less?
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Timing in most engines is retarded from optimum to reduce NOx emissions so the map can increase efficiency at the expense of emissions, NOx is not currently part of the MOT for UK & Ireland as far as I know. You'd be talking small saving though.
I've never seen any sensational claims made by mappers with regard to mpg borne out in reality. The major limiting factors for a van are the inertia, and the wind profile of a brick.
Getting meaningful increase in mpg would require a lot of changes such as. Lowering, adding skirt, adding windage tray, reducing weight, higher tyre pressures, low rolling resistance tyres, less constrictive turbo, larger exhaust, porting intake, swapping 8v for 16v valve head, more forward gears / taller 5th gear for motorway driving, cruise control, reducing speed etc. etc. You could spend and arm and a leg just to get a 15% increase in fuel economy.
