ECU Remapping

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DynoTech Tuning stages explained

  • Stage 1: A custom remap designed to improve the performance of a standard vehicle. ECU parameters are modified to achieve increased performance generally within the capability of the stock engine hardware, such as standard intake and exhaust system.
  • Stage 2: A custom remap designed to improve the performance of a modified vehicle. These modifications typically involve one or all of the following ; air intake systems, exhaust systems, hybrid turbocharges and upgraded fuel systems. The ECU parameters are modified to achieve increased performance optimised around your personal upgrades whilst generally saying within the limits of the standard engine internals and associated drivetrain components.
  • Stage 3: The ‘holy grail’ of ECU remapping were performance is maximised without compromise, this level of tuning normally requires a forged engine. Customers requiring this level of performance will often have specific requirements which will vary based on the application (e.g. Race, Rally, Drift or High performance road cars). Here the ECU parameters are modified to achieve increased performance optimised around your personal requirements and performance upgrades. With this level of engine modification a standalone engine management system is often recommended to maximise performance and meet specific application requirements without compromise.

Why DynoTech Remapping

  • All our true custom recalibrations are done in house on our state of the art industry standard rolling road, and are specifically tuned to your vehicle. Custom recalibration cannot be done correctly without a dyno to accurately measure engine performance. (We do not simply flash maps copied from a similar vehicles and claim that they are custom)
  • All vehicles are inspected and tested to confirm their current performance and ensure the vehicle has no underlying issues , that require rectification prior to remapping, as there is no point in tuning around a fault!
  • When an engine is tuned, they can all start to produce slightly different results, to ensure we get the best from each engine we always custom tune on the dyno, tailoring the parameters for each engine to maximise performance. A custom remap also enables us to tailor the performance to your personal requirements.
  • We always provide a dyno print out, providing the before and after power for your vehicle
  • Our custom remapping involves adjusting the actual targets within the ECU in the areas being adjusted, by taking this approach the ECU’s control system will continue to operate as originally intended. In the past emulation boxes were used to try and improve engine performance, but this worked by tricking the ECU parameters, however the ECU’s learn therefore any initial performance gains will start to reduce as the ECU adapts.
  • At DynoTech we do not adjust the throttle map, unless this is specifically requested by the customer. Throttle map adjustments can give a false sense of power increase, i.e. the throttle map is adjusted so that a small amount of throttle pedal movement will result in significant movement of the engine throttle plate

What is ECU Remapping

ECU remapping is a common phrase that typically describes updating the software within the ECU to allow the engine to deliver improved performance. ECU remapping is completed using several different techniques due to the wide range of communication protocols that each manufacturer implements on their vehicles. The different ECU remapping techniques are described below:

  • Bench mapping: This technique requires the ECU to be completely removed from the vehicle to enable the recalibration to be carried via a direct connection to the ECU at the bench, hence the term ‘Bench mapping’. The ECU is then reinstalled into the vehicle and tested on the dyno to check performance. This process is often repeated multiple times, to ensure the best possible results are achieved and all parameters have been optimised.
  • OBD mapping: Here the On-Board Diagnostic port is used to communicate with the ECU directly and complete the recalibration process. This process is often repeated multiple times, to ensure the best possible results are achieved and all parameters have been optimised.
  • Chip tuning: This technique is required to recalibrate early ECU systems that use EEPROMs, where map data is stored within a chip located on the ECU’s printed circuit board. This process is completed by reading the entire data from the original chip, this data is then modified and flashed onto a new chip. The original chip is then replaced with the new chip that contains the modified maps. Due to the inherent nature of this process it is less feasible to repeat and fully optimise all parameters.
  • BDM mapping: Background Debugging Mode is used to gain access to the microprocessor directly, this system was placed into most commonly used microprocessors by ST, Motorola now Freescale Semiconductors and others. This background de bugging program was place there to enable development of the software that runs in the micro, the useful side to this is it gives us the ability to read and write information stored in the micro.

ECU Remapping Explained (Stage 1)

Power/torque vs Fuel Economy

Custom ECU recalibration will improve the engines power and torque performance and throttle response plus increasing the power-band. This makes the power delivery more linear, and will make the vehicle feel more enjoyable to drive with improved engine  flexibility.  The vehicle’s power output is restricted by the manufacturer for no other reason than to ensure that it fits into a class to suit fleet buyers.

Custom ECU recalibration can be tailored to give an improvement to fuel consumption. With the extra torque produced  especially at the bottom of the rev range – will improve the fuel economy as it will allow you to drive in a higher gear at a lower speed, I.E. the engine is not spinning as fast therefore will consume less fuel and the additional power is especially useful when towing.

Depending on the type of mapping that you require 1, 2, or 3, our custom recalibration service will cover it for you, be it economy, hybrid turbo calibration  or different MAT / Airflow meter calibration, or even a blend map to get the best of both worlds, and not to forget a towing recalibration.



A Diesel engine is slightly different fuel quantity and timing are most important, whilst monitoring boost level to keep the exhaust clean as possible, whilst keeping within the limits of the DFP if fitted.

Petrol (forced induction)

Tuning a petrol engine, the areas that are generally adjust would be, ignition timing, fuel quantity, and boost pressure if it is a charged engine, whilst keeping within the limits of t GPF if fitted.

Petrol (naturally aspirated)

Generally more applicable to  stage 2&3 when a large amount of other work has been done, cams, exhaust or intake system, then we can tune to take benefit of these other modifications, stage 1  a N/A engine will be giving the best it can, gains of a few HP is all that can be achieved.


ECU Remapping Explained (Stage 2 & 3)

On the whole this stage of mapping is when you need to get more specific about your requirements in regards to the type of use the engine is going to be used for I.E. Drift or pure race , if it is race the type of race you will be entering.

If you are going to race or track day then the type of delivery will need to be tailored to that sport, you do not want the boost to kick in so strong that you lose traction leaving a corner, and conversely a drift car requires to break traction and then maintain control of the wheel slip.

Additional Remapping Options

  • EGR – Exhaust Gas Recirculation
  • DPF – Diesel Particulate Filter
  • VSL – Vehicle Speed Limiter
  • Engine Rev Limiter
  • Torque Limiter
  • Launch Control
  • Exhaust Note Tuning