What is torque (Nm)?

Torque is part of the basic specification of an engine: the power output of an engine is expressed as its torque multiplied by its rotational speed. Internal-combustion engines produce useful torque only over a limited range of rotational speeds (typically from around 1,000–6,000 rpm for a small car). The varying torque output over that range can be measured with a dynamometer, and shown as a torque curve. The peak of that torque curve usually occurs somewhat below the overall power peak.

Understanding the relationship between torque, power and engine speed is vital in automotive engineering, concerned as it is with transmitting power from the engine through the drive train to the wheels. Typically power is a function of torque and engine speed.

The SI unit for torque is newton meters (Nm). You may sometimes see torque expressed in U.S. customary units, foot pounds (ft·lbf) (also known as 'pound feet'). When this is applied to a car this means the effort exerted on a shaft to move the vehicle along. When torque is great enough to move a shaft through a given distance in a given time this is expressed as power and measured as horsepower. Basically, with more torque available the quicker you can move the wheels from stationary.

What is bhp?

An engine produces power by providing a rotating shaft which can exert a given amount of torque on a load at a given RPM (crankshaft revolutions per minute). The amount of TORQUE the engine can exert usually varies with RPM.

A dynamometer determines the power an engine produces by applying a load for the engine output to drive against thus absorbing power. The dynamometer control system causes the absorber to exactly match the amount of torque the engine is producing at that instant, then measures that TORQUE as well as the RPM of the engine shaft, and from those two measurements, it calculates power.

Can my car be remapped?

We can remap 99% of post-2000 (and some earlier) diesel vehicles, as well as many petrol vehicles. Please check our comprehensive vehicle application list but don’t hesitate to contact us if yours is not listed.

Where is the remap done?

Our workshops are based in Cheltenham, Gloucestershire and you are welcome to come here to have the work done. Our opening times are Monday to Friday, 8:30am to 5:30pm. Our remaps can be completed whist you wait.

We also offer a mobile service in some areas, including Cheltenham, Gloucester, Evesham, Ross-on-Wye, Worcester, Stroud, Cirencester, Swindon. Please contact us for further information.

Can remapping be reversed?

We store all original ECU mapping data on site meaning the vehicle can be returned to standard if required. This process is completed free of charge at our premises in Cheltenham.

Will remapping effect my fuel consumption?

The way you drive the vehicle will effect your fuel consumption – as it would before remapping is completed! If you use all the extra power, all the time, you will naturally see a rise in fuel consumption. We can also remap vehicles with economy in mind.

Will remapping effect my insurance?

We would advise that you inform your insurance company of any modifications made to your vehicle but this is obviously your decision.

Why don’t car manufacturers remap each engine?

There is a simple answer to this question – car manufacturers sell cars all over the world and they need to be able to be reliable and economic in all conditions (ie. one size fits all!). The manufacturer therefore purposefully detunes their engines to cope with poor quality fuel, atmospheric conditions, poor servicing etc. to prevent engine damage caused by these conditions. They also have to cater for the masses, including those to whom power is not of vital importance!

In the UK, we do not suffer from these poor conditions meaning that vehicles can be re-tuned for our power-happy, fuel saving nation! This is where we can help!

Do I need to have my car tested on a rolling road?

Rolling roads are a way to measure the power of a vehicle. However, they can also lead to many unhappy and confused car owners as results can often be misread due to a general lack of understanding of the limitations, drawbacks and also benefits of a rolling road.

It is impossible for a rolling road to simulate real world driving. The amount of time and constant load on an engine and turbo charger, on the rolling road, will inevitably raise intake temperatures well beyond what the real world driving will see. Raised intake temperatures will cause the ECU to factor the boost / fuel / timing maps to reduce load, thus limiting power as a protection feature. It is very common for a car to have less rolling road performance and yet maintain strong power on the tarmac.

Also, the fan we usually see in front of the vehicle when a vehicle is on the rollers is providing a linear flow of air, normally to a small portion of the frontal area of the vehicle. If we were to compare this to real world conditions, we can prove airflow is proportionately increased as speed is increased. This isn't replicated with the airflow on a dyno. This causes the air intake temperature to be well outside of what we would see if we were to log temperature on the road. The higher these temperatures get, the lower power output will be. So from this we can make some assumption that a car will probably make more power on the road than the dyno.

One of the biggest mistakes people make is to take a figure from a Rolling Road as gospel. There are so many varying factors between different dynos that can affect the output, that can differentiate vastly from one rolling road to the next. Realistically, a rolling road can be a great tool to show differences from the fitment of additional hardware, but worthless for a one off reading.

What is important is a road test and inspection of the vehicle before it's flashed. We will always drive your vehicle before it is mapped and run a check of the vehicle to see if there are any issues that need addressing prior to software being installed. The car will be road tested again after the map is flashed. You won't need a rolling road to feel the difference!

Should you have any further questions, please don’t hesitate to contact us.

Locations include: Cheltenham, Gloucester, Bristol, Swindon, Bath, Chippenham, Thornbury, Dursley, Stroud, Witney, Cirencester, Coleford, Ross-on-Wye, Cinderford, Lydney, Hereford, Worcester, Bromsgrove, Kidderminster, Warwick, Evesham, Stratford-Upon-Avon, Great Malvern in Worcestershire, Gloucestershire, Herefordshire, Avon, Oxfordshire, Warwickshire, Monmouthshire,