ECU remapping in La Línea

What a remap actually is

The engine control unit (ECU) is the computer that decides how much fuel goes in, when the spark fires, how much boost the turbo makes and how the throttle responds. Manufacturers leave plenty of headroom in those settings, because the same engine is sold in many markets, on different fuel, to drivers who don't always look after it.

A remap changes those maps to use some of that headroom. On a turbocharged engine you usually feel it as stronger pull from low revs and easier overtaking. How much you gain depends on the engine, its condition and what hardware is fitted, so we won't quote figures before we've seen the car.

We also write pops and bangs maps (the crackle on the overrun when you lift off) for owners who want them. They're done on request and are worth thinking about carefully, because they make the car louder and can cause trouble at the ITV or MOT.

Why people remap

Not everyone is after the same thing. These are the reasons we hear most often:

• More response and torque from a standard car without changing any parts.
• Matching the software to a new exhaust, intake or intercooler.
• Smoother, more progressive power delivery, especially on turbo engines.
• Tweaking the automatic gearbox (DSG or similar) to suit the new map, where the car allows it.
• A pops and bangs map, for owners who want the sound and accept what comes with it.