Improve Acceleration

Power AND Economy

The Select-A-Map ECU will match (or better)
ANY diesel tuning box performance!

Select-A-Map - Diesel Remap ECU

The Compromise

While it may sometimes be possible to improve on the compromise made by the vehicle manufacturer and achieve a slight increase in both performance and economy, for any real gains, there will always be a trade-off between the two.

No exceptions

  • No single remap can provide the best performance AND economy simultaneously.
  • Running high performance maps continuously will inevitably lead to DPF problems.

This is especially true of diesel tuning boxes, which indiscriminately control fuel, irrespective of engine speed and load, resulting in an even greater compromise that leads to wasted fuel, in the form of particulate emissions, further increasing the likelihood of DPF problems.

Read more about the differences between remaps and diesel tuning boxes here.


No Compromise

Select-A-Map - Diesel Remap ECU
Highest Performance* Check
Best Economy* Check
Lowest Emissions* Check

A engine remap using the Select-A-Map ECU can out-perform any diesel tuning box in terms of performance, economy AND emissions.

This is possible because, like any conventional fuel remap, Select-A-Map remaps the vehicle's fueling in accordance with engine speed and load but, unlike any conventional remap, Select-A-Map provides FIVE instantly switchable maps (via a remote control).

Each of the 5 maps can be completely customised** and optimised, ensuring that the purpose for which the map is intended, be it performance, economy, or emissions, the best possible results can be achieved, without compromise!

Innovation and Versatility

The Select-A-Map's unique design means that not only can fueling be increased but, where necessary, fueling can just as easily be decreased, all in accordance with engine speed and load. This gives fuel control capabilities that are far more accurate and superior than any tuning box and enables maps to be created that give greater economy, better emissions or that can prevent, or even reverse, DPF blockage.


Performance Guaranteed

We don't make wild claims or promises about how much extra power the Select-A-Map ECU will give your vehicle – we leave that to the diesel tuning box suppliers – Instead we make one simple guarantee:

The Select-A-Map ECU will match (or better)
ANY diesel tuning box performance!


We can make this claim because the Select-A-Map diesel control ECU is comparable to a full diesel fuel remap, with which no diesel tuning box can ever compete (more info here).

Additionally, the Select-A-Map provides 5 instantly switchable fuel maps, allowing quick switching between performance and economy modes while driving***, making it a unique, no compromise solution that, unlike any remap or tuning box, is also DPF friendly.

* Compared with a diesel tuning box on the same vehicle and assuming Select-A-Map has been correctly installed, calibrated and configured and that the relevant map has been selected and professionally refined.

** The installer may charge a fee for any additional map refinements.

*** For safety reasons, the engine is required to be at idle speed before map switching will occur.


Select-A-Map - Diesel Remap ECU

The world's most advanced diesel performance computer

The SELECT-A-MAP Diesel Control ECU is a new generation, diesel control computer that is undoubtedly the most sophisticated and advanced tuning product available anywhere.
Click here to view or download the brochure

A complete fuel remap with all the convenience of a tuning box

Select-A-Map ECU The Select-A-Map ECU is quite simply a revolution in vehicle remapping. It combines most of the benefits of a conventional diesel ECU remap with the ease of installation of a diesel tuning box. It is designed to be highly universal, making it compatible with most common rail diesel engines and it contains a host of other features not found in any other product.

The only non-intrusive remapping solution

Using patented technology, developed in the UK by the fuel injection experts at CRD Technology, the Select-A-Map ECU allows your vehicle to be remapped without cutting wires or making any modification to your vehicle's ECU. This not only makes for a quicker installation time, but also makes transferring to another vehicle possible and greatly reduces the risk of invalidating your vehicle's warranty.

Select-A-Map System Diagram – Click to Enlarge
Select-A-Map Block Diagram
Click here to view or download the brochure

Power, speed and accuracy

To maintain engine efficiency and reduce the risk of Diesel Particulate Filter blockage, it is imperative that any modifications to the quantity of fuel injected are precisely metered and timed. The Select-A-Map ECU achieves this by accurately monitoring fuel rail pressure as well as injector opening times, using a unique, non-intrusive injector sensing method. It performs many millions of calculations per second, enabling it to compute engine speed and load values instantly so that the exact quantity of fuel required is always injected at exactly the right moment.

Advanced Features

Using the same principle as a professional ECU re-map to create a mirror image of the vehicle's own ECU fuel map, the SELECT-A-MAP creates 5 different maps that are instantly switchable using the remote key fob with the ignition on or engine at idle. Select-A-Map Remote Control Key Fob

1) Standard Map

Standard torque and standard power.

2) Economy Map

Increased torque and standard BHP to enable optimum economy – Can be refined to operator's specific requirements.

3) Fast Road Map

Increased torque and increased BHP for everyday driving, while retaining good driveability and improved economy, with no adverse effect on DPF.

4) Very Fast Road Map

Tuned to give the highest Torque and highest Power for occasional fast road or track day use.
Note: Prolonged use of this map could result in more frequent DPF regeneration and, since it provides uncompromising levels of performance, fuel consumption will likely increase.

5) Reduced Power Map

Low Power or 'Valet' option enables already powerful cars to be used by less experienced drivers.

Any of the predefined maps can be used as is or, as an optional extra service, the installer can further refine any map* to suit individual requirements.

No single map is right for every purpose. Vehicle manufacturers are forced to compromise by producing a map that meets emission regulations while providing acceptable economy and performance.

ECU re-map specialists experience similar problems when working with a single map; improvements can be made in some areas but never in all areas.

By offering 5 customised, instantly switchable maps, it is possible to provide an uncompromising solution that can be tailored to suit any purpose and every customer.

Some re-mapping companies offer customers an optional OBD handset that allows switching between 2 maps, but this procedure can take several minutes to perform and carries a risk that a data error could render the vehicle's ECU inoperable.

A specific map can be selected as the default map to revert to at power-up/ignition-on. For example, it may be preferable to always start the vehicle with a standard/100% map or, for added security, a reduced-power or ‘valet mode’ map. Note: One exception to this is Map 5 which, when selected, remains selected, regardless of any default map settings or ignition status, until a different map selection is made.

* Additional mapping costs may be charged.