How Does Remapping Work?

Remapping rewrites the software in your car's engine control unit (ECU), the computer that decides how much fuel, boost and ignition advance the engine gets. Done well, it gets you more power, more torque, better fuel consumption or a mix of all 3. Every tuner in Ireland has its own approach, so this is how remapping your car works at JTK Remapping.

What the ECU does

The ECU is the brain of your engine. It reads the sensors and tells the engine what to do, thousands of times a second. Manufacturers set it up with limits for all sorts of reasons: different markets, fuel quality, emissions rules, or simply because one setting for every country is easier. A remap adjusts those settings for your car and the way you drive, which unlocks the performance the engine already has.

Your visit, step by step

Whether it's your own car or a fleet vehicle, you come to our workshop in Dungarvan on a day and time that suits you.

• Ring ahead and we'll book you in.
• Grab a coffee and relax while we look after the car.
• First, the car goes on our dyno (short for dynamometer). We use the right setup for your vehicle, including all-wheel drive, so the readings are right.
• The dyno run records torque, horsepower and how the power comes in, and we assess it to see where the engine can improve.
• We then remap the ECU with specialist tools and software that are well tested and trusted across the industry. We're happy to talk you through any part of it.
• A second dyno run and a test drive check that everything is working as it should.
• The testing and remapping should take no longer than an hour, and then you're free to drive it and tell us what you think.

Is remapping your car worth it?

More torque means the engine reaches its best performance with less effort, so you get up to speed sooner and use less fuel doing it. Those small savings add up over time, and quickly across a fleet. For a lot of drivers the bigger difference is how the car feels: easier overtaking, fewer gear changes and a car that pulls when you ask it to. If you want the most power, see performance remapping.

Not only for cars

Vans and 4x4s benefit from remapping too. A remap can help a working van earn its keep for longer, cost less to run and get more done in a day.

To see what your car could gain, check it in the Remap Calculator, or get in touch to book your vehicle in.