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11 / 02 / 2019

How ECU remapping works

The idea of modifying a chip instead of physically modifying your vehicle to increase performance seems impossible, right? Wrong! It’s entirely possible, thanks to ECU remapping. Here’s how we achieve peak performance without adding any physical modifications:

Ignition Timing Mapping

Ignition timing isn’t as complicated as the name suggests. The ignition system on your car needs to work in perfect harmony with the rest of your engine. To achieve this, the fuel needs to ignite at exactly the right time so that the expanding gasses can do the maximum amount of work. If the system fires at the wrong time, the power will fall whilst gas consumption and emissions increase.

When the fuel/air mixture in your engine’s cylinder burns, the temperature rises, which in turn converts the fuel into the exhaust gas. This conversion causes the pressure in the cylinder to increase and force the piston down.

Air to Fuel Ratio (AFR) Mapping

Those who have limited knowledge of performance vehicles, wouldn’t know that incorrect air/fuel ratios cause engine failures. The correct AFR can be the difference between life and death for your engine. There are four considerations to be made regarding AFR.

  1. What’s scientifically best
  2. What’s best for fuel economy
  3. What’s best for power
  4. What’s best for your engine’s life

Luckily, your tuner will know the perfect AFR for your specific car and fuel consumption requirements.


ECU remap effects on Boost

Adding a boost is without a doubt one of simplest ways of adding power. If a car comes with turbo from the factory, often it’s tuned in a way that keeps the boost levels reliable and efficient. By increasing this further, you’re increasing the amount of air packed into the cylinder. By adding more air, you can now add more fuel.

Seems simple enough. So, what’s the drawback?

By adding power, you’re increasing the pressure and heat within the cylinders. This in turn adds stress and reduces your engines life. Unfortunately, there isn’t a way around this. If you’re keen on boosting your car, you need to ensure the internal components can handle the added stress. For this reason, forged pistons, rods, and cranks are some of the most widespread aftermarket parts. Whilst it may be tempting to crank the boost on a stock engine, your warranty will become null and void, whilst also increasing the probability of engine problems.


Remap Your Launch

Tuning and car engine remapping doesn’t have to be all about adding power, it also gives you the ability to modify your launch, also known as ‘launch control’. Car remapping is the process of modifying a car’s engine management system to change the way it operates. It can be done for a variety of reasons, including to improve fuel efficiency, increase power output, or to fix problems with the engine.

Car Engine Remapping

Launch control is a simple yet effective way to ensure consistent reliable launches at the track, strip, and even on the street. The user defines a ‘launch rpm’, that when launch control is activated, the vehicle will maintain. This system allows the driver to hold the car at full throttle whilst maintaining a suitable RPM for launch. This system is especially prevalent in turbocharged cars due to the additional benefit of building boost prior to the vehicle leaving the line.

If you’re after consistent launches minus wheel spins or wheel hops, then launch control should be a serious consideration.

launch control


There are a multitude of companies that provide plug and play engine ecu tuning devices for a wide variety of cars. Whilst these tunes can be beneficial for performance benefits, it’s important to remember that the longevity of your engine (and your warranty) has been reduced. It’s always a good idea to have your car professionally tuned by an expert, so that the boundaries and limits remain safe. That’s why we recommend bringing your car to us, because no one knows performance like Zuce. Our passion for automotive performance knows no bounds. By utilising Alientech performance tuning technology, we ensure your warranty is maintained whilst offering you a performance boost worth smiling about.