Diesels ripe for remapping

Diesel engine cars have found favour in recent years thanks to their outstanding economy figures, which helps with company car tax and helps put money back in your pocket. Did you know, though, that a diesel engine is a prime candidate for tuning?

There is a running joke on motoring website Pistonheads that says nothing is faster than a remapped BMW 335d, and cross country there’s some truth behind the jest. That’s because a diesel engine is almost invariably combined with a turbo, which makes it easy to extract extra power. Beyond that, the higher temperature that diesel burns at ensures that the engines are built with a much stronger ‘block’, the basic body of the engine. That means it’s easy to boost the engine with almost no concerns over longevity and a simple remap is the best way to do that.

Boosting the pressure on the turbo is the straightforward way to greater performance. A modern turbodiesel comes with a massive amount of horsepower and, more importantly, torque in any case. A decent modern repmobile that returns 50 mpg will leave a supercar from the 90s in its dust, but it’s possible to unlock a formidable amount of extra performance. The best part is that with careful tuning through the electronics, the actual real world economy is barely affected.

Of course, you can go the other way with your diesel and detune it with the help of a map (http://www.gadtuning.co.uk/blog/economy-remapping/), which gives you even greater range on a tank of fuel and makes your car even more frugal than you ever thought possible.

If you do big miles then this is absolutely the way to go. You won’t notice the slight dip in performance on the motorway, but you will appreciate the extra pounds in your pocket. If you bought a diesel thanks to the tax advantages, though, or indeed if your company insisted and have a thirst for a little extra performance, engine remapping (http://www.gadtuning.co.uk/performance-remapping/) can give you a real boost and turn your turbodiesel into a real giant-slayer that still cruises past the pumps time and again.

Photo: 335d by Tomcio77 licensed under Creative commons 2