Why bother with a remap?
There are two primary reasons for wanting a remap, and they’re called power and torque. When your car left the factory there’s a very good chance its performance was deliberately muted in order to meet product planning objectives or economy and efficiency targets.
These days the power and performance of most cars is limited, not by any particular mechanical factor, but by the software running in the engine control unit (ECU).
Computer algorithms running behind the scenes while you’re driving a modern car affect all sorts of parameters, such as ignition timing, air/fuel ratio and turbocharging boost pressure.
So if you want greater performance and pulling power from your car, or alternatively if you’re seeking mpg improvements, the first place to look is the little black box under the bonnet. Here at Auto Express we receive plenty of emails asking advice about ECU software changes, and we've compiled this guide to explore the pros, cons and costs.
Chipping turbodiesel engines can increase economy by seven to 10 per cent, because it adds torque lower down the rev range. This means the engine doesn’t have to work as hard as before. It's these turbo diesel engines (often known as TDI, HDi, CDTi depending on the manufacturer) that are cornerstone of the car chipping industry because an engine chip or software upgrade can cheaply add so much to the performance.