We are ECU remapping specialists for cars and vans based in Welwyn Garden City. 

Using the very latest genuine tuning equipment and custom written maps, we can achieve your engine’s true performance and fuel economy. You can rest assured that you will get the highest quality, safe and reliable tuning with the maximum gains for your vehicle. 
The remap figures we quote are realistic and our files are designed to optimise performance without compromising reliability.
We provide tuning solutions for all diesel and petrol cars. 
Customer satisfaction is at the forefront of our business. 


Our ECU maps are proven to be effective and reliable. We can achieve maximum gains in power and torque for your vehicle, giving you a smoother, quicker acceleration and better drivability without decreasing the reliability. 
Another major benefit of remapping your vehicle is reducing the fuel consumption
We offer a lifetime warranty against any software malfunctions
Before proceeding with the remapping, we will carry out a complete diagnostic health check to make sure the engine is in a fit state.
We keep back ups of all the remaps we do, so at any point in the future, if you decide that you want your vehicle reverted back to the original figures, we can wipe the remap and reset the ECU to the original format.


The economy engine remap is improving the fuel economy of your vehicle and decreasing the CO2 emissions, whilst still providing power increase and throttle response. Typically the economy gains are between 10-15% depending on the use.


Our Stage 1 Tuning will increase BHP and torque whilst also improving fuel economy. With the extra torque, your vehicle will require less throttle input and you will notice fuel savings. Stage 1 tuning is designed for standard specification unmodified vehicles.  Removes flat spots and gives a more responsive drive without compromising reliability. Includes full engine health check prior to tuning.


Bigger increase in power and torque than a Stage 1 Remap, efficiency will still improve but not as dramatically as a Stage 1 Tune. Often hardware upgrades are required before a Stage 2 Remap can be applied. Removes flat spots and gives a more responsive drive without compromising reliability. 


Up-rated hardware will be required, the numerous hardware additions require a fully bespoke remap carried out on our rolling road where parameters can be monitored in a safe and reliable way. There are exceptions to this, where Stage 3 and above development has already been carried out on your specific vehicle. Please contact us with your spec list and we can provide a custom quote and offer advice on the required hardware upgrades.


Cartech Welwyn Tuning / Remapping