Remap? Do they really improve MPG?

andy8442

Thanks for the replys. I already coax high 30'smpg out of my van. I HAVE to drive for my job. I spend on average £200 a week on fuel so saving just 10% could pay for itself quite quicky. I'm not looking for tips on driving or taking bits off the vehicle, just real experiences of remaps.

Delivery_Driver

I've got experience of both remaps and also teaching fuel saving driving and the best gains are to be made on the driving side.You are getting good mpg to start with but it can always be improved .
Most people initially don't think they can learn anything though, then see the results speak for themselves.

Premier_2

andy8442 wrote: »

Hello, with the price of fuel going through the roof I'm considering a engine remap of my diesel van. Is there anyone out there with a genuine experience of increase in MPG with one of these.

I've fitted low resistance tyres, taken everything out of it that I don't need, basically doing everything I can already to improve mpg, and I set off 15 mins earlier as well.

Yes, it's very easy for anyone with the most basic calibration skills to remap a production car to improve fuel consumption.

Why do you think OEMs don't do this when fuel economy, CO2 emissions and overall COO are all so important to most buyers, especially buyers of diesel engined vehicles?
Could it be that they know that, through through their £millions R&D programmes, they realise that the production cal. released is one to optimise everything not just fuel economy but including legal emissions requirements and/or otherwise protect other parts of the vehicle.

But go ahead and put a new cal in the vehicle if you think some aftermarket calibrator knows more about a particular vehicle than the OEM does.

Gloomendoom

Remapping is no different to old school tuning. When a car is manufactured it gets a one-size-fits-all tune that the manufacturers have tested and are confident will work well on every car of that type that rolls off the production line. This may not be the optimum tune but it can be guaranteed to deliver the correct emissions and adequate power output with the thousands of engines that they produce without them having to mess around tuning each engine individually. If an individual is prepared to take the time (and pay the money), it is quite possible improve the output and efficiency by fine tuning the map to suit the characteristics of an individual engine.

Strider590

Not as to !!!! on anyone parade, but aren't remap's are supposed to be made MOT failure's in the near future?

forgotmyname

Yes, They would like remaps to fail the MOT. What they lack though is the equipment and knowledge of howto implement that.

Every ecu could need a checksum that could be verified at MOT time, And every dealer will need to supply updates everytime they build a new update to cure some issue or other.

So if they need to turn the idle up on your model of car, But only ones that were built on 1st-3rd Feb, Then they would need to supply new data to the MOT equipment manufacturers.

Notmyrealname

andy8442 wrote: »

Thanks for the replys. I already coax high 30'smpg out of my van. I HAVE to drive for my job. I spend on average £200 a week on fuel so saving just 10% could pay for itself quite quicky. I'm not looking for tips on driving or taking bits off the vehicle, just real experiences of remaps.

Do an economical and defensive driving course. It'll make the world of difference - far more than unbolting things and changing things.

Gloomendoom

Notmyrealname wrote: »

Do an economical and defensive driving course. It'll make the world of difference - far more than unbolting things and changing things.

Or put a brick under the accelerator pedal.

Notmyrealname

Gloomendoom wrote: »

Or put a brick under the accelerator pedal.

Or the brake.

andy8442

Ok then just to change tack a bit , who knows of a big MPV that will do 50+mpg.

I'm thinking of changing soon anyway and a big MPV would do the job sort of.