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EcuTek Tuning Information

Tuning Information

What Is An ECU Map?

Each basic engine function (such as ignition, fuelling and boost control) is governed by one or more 2-dimensional maps. Let's look at boost control as an example.

A typical boost control map is an 8 by 8 grid of numbers. The rows represent RPM, whilst the colums represent engine load. The values in this grid are the desired boost pressures. Many times per second, the ecu will check the current engine RPM and engine load, and will look up the boost pressure that it should try to maintain. In the example above, each row in the grid might represent 1000 RPM steps, the 8 steps being equivalent to 1000, 2000, 3000, 4000, 5000, 6000, 7000 & 8000 RPM.

Read more: What Is An ECU Map?

The History of Tuning

Car engine tuning, once the domain of the mechanical engineer, has developed with the introduction of high speed, low cost electronics.

Cars are increasing controlled by a multitude of Electronic Control Units (ECU). These units are now being linked and interact to control functions such as the immobiliser system, climate control, traction control, fly-by-wire throttle, anti-lock braking, stability control and active suspension & differentials. In fact there is virtually no part of the car now, which at least one ECU does not influence.

With this in mind, cars are not so easy to tune as they were in the past.

Read more: The History of Tuning

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