FAQ

There are three stages of car remapping:​

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Stage 1: the software on the ECU is updated. This alone can boost the car’s power and torque.

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Stage 2: parts of the engine will be modified to work with the ECU update. This may include upgrading the intercooler, exhaust or air intake.

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Stage 3: hardware upgrades are carried out. The vehicle will typically get a custom remap and be tested on a rolling road. It’s the most expensive of the options.

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What does remapping a car do?

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 Remapping will affect how the car’s engine works by optimising:

Fuel injection

Ignition timing

Turbocharger boost

The fuel/air ratio

Accelerator response

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Remapping the software and fine-tuning the engine can increase a car’s power and torque output, maximising its overall performance by 20-50bhp or as much as 35 per cent. But this will vary between makes and models, and the type and quality of remapping done. You should notice an improvement in handling and performance almost immediately after remapping.

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What are the benefits of car engine remapping?

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Better performance and power

Your car’s speed and power can be enhanced. With an enhanced throttle and faster engine response as you press the accelerator (high torque), your car may feel easier to drive. You’ll have greater confidence when overtaking too.

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Improved fuel economy

If you go easy on the accelerator, remapping could help to increase your car’s miles per gallon (mpg) and overall fuel economy by optimising how much fuel is burned. You could save money and reduce your carbon footprint.

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Easier towing

If you use your vehicle to tow a heavy trailer or caravan, remapping will mean it won’t have to work so hard when climbing or accelerating.

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Changes aren’t permanent

If you’re unhappy with your car’s remapping, you can revert to the manufacturer’s specs.

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What are the disadvantages of remapping a car?

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Could invalidate the car’s warranty

If you get a remap that isn’t approved by the manufacturer or dealership, it’s likely to invalidate your car warranty.

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Turbo engines benefit the most

Only turbo-powered engines will fully benefit from a simple engine remapping. If your car is a non-turbo petrol model, it’s unlikely you’ll notice much difference in brake horsepower (bhp) from a remap alone.

 

Increased running costs

Greater power can also mean more strain on the engine. Be prepared to have your car serviced more frequently. After remapping, your car’s major components, such as the clutch, may suffer greater wear and tear. You may need to buy higher octane fuel, which is usually more expensive. Fuel economy could also be reduced if your remapping focuses on greater power.