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ECU Performance Tuning at Balsdons Vehicle Services


With the use of Autologic Diagnostics, Balsdons Vehicle Services' Performance Tunes are modifications to the manufacturer's vehicle tune data. These modifications are downloaded from the Autologic unit to the vehicle's Engine Control Module (ECM) through the on-board diagnostics connector.


What does tuning involve?
With BVS and Autologic, it is surprisingly quick and simple to carry out a Performance Tune upgrade, Before tuning any vehicle, it is first necessary to undertake a diagnostic report to ensure there are no issues which may affect the performance upgrade. Once completed, the relevant performance tuning software is simply uploaded to the vehicle through the Autologic tool. The re-tuning process itself only takes around 25 minutes and involves the electronic removal and re-installation of a more refined and more enhanced version of the vehicle's computer programming.

Why do manufacturers limit the output of their engines?
The standard manufacturer tune is a compromise of hundreds of factors. Principally, the manufacturer must ensure a high degree of engine reliability across the worldwide market taking into account factors such as:

  • Fuel quality
  • Different servicing schedules
  • Different operating environments, such as altitude and terrain
  • Local legislation with regard to power output and emissions
  • During testing, manufacturers 'tweak' the tunes constantly to achieve individual results for individual tests, thus compromising the overall smoothness of the original tune. BVS Autologic Performance Tunes are optimised for European and US driving conditions. As long as the manufacturer's service schedule is adhered to, there is no reason why this extra power cannot be 'unlocked'.

How will the emissions be affected?
All BVS Autologic Performance Tunes are tested to ensure that they comply with UK emissions laws.

Is the tuning process reversible?
Yes. In the unlikely event that you require the BVS Autologic Performance Tune to be removed, the process can be reversed without any side effects.

Are there any physical changes to the vehicle?
Not usually. Most BVS Autologic Performance Tunes are ECM software downloads only. There will be no physical evidence that the engine has been up-rated.

Can my car have a ECU performance Tune?
Currently the BVS Autologic tool can undertake ECU performance Tuning for most BMW's, Landrover's, and Mercedes' a full list can be found below...


Defender 2.5L Td5 2002 - 2007 | Defender 2.4L 2007 onwards | Discovery 2 Td5 | Discovery 3 TdV6 | Freelander Td4 | Freelander 2 Td4 | L322 Tange Rover Td6 and TdV8 | Range Rover Sport TdV6 and TdV8 


1 Series E81 | 3 Series E36 / E46 / E90 | 5 Series E39 / E60 | 6 Series E63 / E64 | 7 Series E38 / E65 / E66 | 8 Series E31 | X Series E53 / E83 / E71 / E72 | Z Series E52 / E85 / E89 | Mini R50 / R52 / R53 / R56

--Mercedes Benz--

BVS Autologic have currently developed performance tunes for MERCEDES-BENZ vehicles. However, as each control unit and vehicle has hundreds of variations, the garage must first diagnose the individual vehicle with the BVS Autologic tool to establish if a performance tune exists for the current level of ECU software.
If a tune does not exist for the variation, Autologic Diagnostics can usually develop a performance tune for the customer. To enable a tune to be written, specific data is required to be sent about the control unit to Autologic. Once written, the tune is uploaded to the user area of the Autologic website usually within 24 hours, ready for the individual garage to download and use.
For the latest MERCEDES-BENZ performance tunes availability, please contact us.

If you require any information about the Autologic Diagnostic tool please visit theirwebsite on


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