Engine remapping for trucks and lorries

Powerconcept has been developing engine maps since 1995, in Nivelles, and measures its results on its own dyno. In transport, the request is rarely peak power: it is fuel use per kilometre and pulling power under load. We work at the workshop or at your place, at the depot, in Belgium and in the neighbouring border regions.

Rigid truck with the cab tilted forward in a workshop, a diagnostic laptop connected to the engine ECU.

What we do, and who for

We work for haulage firms, civil engineering companies, rental fleets and owner-drivers running a single truck. The work is the same in both cases: we read the ECU, we save the factory file, we develop a map for that specific engine, then we write it back and check how it behaves. We work on injection, boost pressure and torque management, never on the emission control systems.

An articulated lorry does not fit on a roller dyno built for cars. On a heavy goods vehicle, validation is therefore done through electronic readings before and after, checks on pressures and temperatures, then a loaded road test. The dyno remains central to the method for vans and for development work: it is what taught us where a given mechanical set-up stops.

On-site work is the most common choice for heavy goods vehicles, and that is deliberate: a truck driving to Nivelles is a day of transport lost. We come to your operating site, to the depot or to the construction site, in Belgium and in the neighbouring border regions, so reading and writing happen on the spot.

Workshop in Nivelles (rue du Commerce 13) or work at your own site
Factory file saved and archived: the work stays reversible
“Eco” or balanced setting, depending on how the vehicle is actually used
Named invoice and intervention report

What a truck map actually changes

Our development database, the one our configurator queries, holds 494 truck engine variants across 8 brands. These are development values, not a promise for your vehicle.

In Stage 1, the median of our database is 16 % more power and 17 % more torque. Nine variants out of ten fall between 9 and 35 % for power, and between 11 and 29 % for torque. The gap between those bounds says the essential thing: the same brand can offer a wide margin on one engine and almost nothing on another, depending on the generation and on the factory power level.

On the road, that extra torque first shows up as a gear held longer on a climb and fewer downshifts at full load. That is also where the fuel lever sits: at the same speed and the same load, an engine working lower in the rev range uses less. If the driver spends the gain instead of banking it, consumption does not move. That is why we talk about an “Eco” setting: the calibration is deliberately conservative, and the gain is placed where the truck actually works.

Our database holds no Stage 2 data for heavy goods vehicles. We therefore put no Stage 2 figures on this page, and we do not offer it without a specific study.

How the work is carried out

The first step is always a diagnostic: electronic reading of the vehicle, a check that no fault codes are stored, condition of the turbo, the injection system and the emission control line. A truck that already has a fault gets repaired before it gets remapped.

The software is read through the diagnostic socket when the ECU allows it. Otherwise it is read directly on the ECU, on the bench, which means removing it. That is what weighs most on downtime: we check your part number before fixing a slot.

Then comes development: injection, boost pressure and permissible torque tables are changed in progressive steps, keeping the ECU protections active. The file is written back, then checked through electronic readings and a loaded test, plus a before and after dyno run for vans.

Every heavy goods job is quoted individually: the brand, the generation, the reading method, the number of vehicles and the location all change the actual work.

The truck brands we work on

Our database covers eight heavy goods manufacturers, with original values and the values targeted in Stage 1.

Mercedes-Benz Trucks: the best covered brand in our heavy goods database.
MAN: wide coverage on the generations common in Belgium.
Volvo Trucks and DAF: two brands strongly present in Belgian long-distance fleets.
Scania and Renault Trucks: road tractors and distribution rigids.
Mack and Freightliner: North American engines, useful for imported vehicles.

Your engine variant is not listed? It is simply not in our database yet, which does not mean it is impossible. Describe your vehicle to us and we will tell you what data we hold.

What we do not do, and why

At Powerconcept we neither remove nor disable any emission control system. No particulate filter, no EGR valve, no AdBlue, neither on the road nor off it. This is not a commercial stance, it is the law, and it is also what protects your vehicle, its resale value and your insurance cover.

We do not fit tuning boxes either. A box sits between the sensors and the ECU and feeds it falsified values: the engine then works outside its own tables, protections included. A remap changes those tables themselves, inside the ECU, leaving the protections active.

We do, on the other hand, diagnose and repair SCR faults, the leading cause of downtime on a recent diesel. Urea quality sensor, pump, injector, crystallised fluid, a fault logged by the ECU, then engine derating: that derating cuts available power and eventually prevents starting. Our job is to identify the failed part, replace it and bring the system back into working order with fluid that meets the standard. We are describing a repair method, not a guaranteed outcome: the real state of the system is established by the diagnostic.

Our rule fits in one sentence, and it has not changed since 1995: we work on engine calibration, never on what protects the air we breathe. DPF, EGR valve and AdBlue: where we stand

Frequently asked questions about truck remapping

Does a remap void the truck manufacturer's warranty?

It does not void it automatically, but it can be held against you: a manufacturer may refuse to cover a part it considers to have failed because of the modification, usually in the engine and transmission chain. The rest remains. We keep your factory file, and the original map can be written back before a dealer visit.

Does a lorry need a new roadworthiness test after a remap?

No, a remap does not trigger a re-test obligation. The vehicle must of course remain compliant: since we never touch the emission control systems, the emissions check goes as before. If the power figure appears on the registration certificate, mention it to your insurer.

Do you remove AdBlue, the DPF or the EGR valve on a truck?

No, never, and no more off the road than on it. We neither remove nor disable any emission control system. We do diagnose and repair SCR faults, which are the real reason the question gets asked.

My truck is derated by an AdBlue fault: can you help?

Yes, by repairing it. Derating is the ECU's normal reaction to an SCR fault: it cuts power, then speed, and eventually blocks starting. We read the fault codes to identify the part at fault, replace it and bring the system back into service with compliant fluid. What we will not do is silence the fault and leave the system out of action.

Wouldn't a tuning box be simpler on a truck?

Simpler to fit, yes. Safer, no. The box falsifies the signals the ECU receives, so the engine works outside its own tables and protections. On an engine running thousands of hours under heavy load, that is exactly what to avoid. Tuning box or remapping

How much fuel can be saved?

We do not put a figure on fuel savings: it depends first on the driver. Torque available lower in the rev range lets a gear be held longer and keeps the engine in its efficient range more often. If the gain is spent on going faster, consumption stays the same.

Do you travel out, or does the truck have to come to Nivelles?

Both are possible, and travelling out is the usual case for heavy goods vehicles. We work at your operating site, at the depot or on the construction site, in Belgium and in the neighbouring border regions. The Nivelles workshop stays available for vans that go on the dyno.

A quote for your truck

Give us the brand, the engine and the year, and tell us how many vehicles are involved. We reply within one working day. Beyond a single vehicle, see fleet remapping. See also tractor and agricultural remapping and construction machinery remapping.

Request a fleet quote Quote for one vehicle