How do ID the correct DPT for my vehicle?

This site has a search facility where you can specify your vehicle and correctly identify the correct DPT. The DPT units are specifically tuned for your diesel engine. But if you have any problems finding your vehicle simply contact us and we will help you.

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What is included in the price?

The DPT unit, Vehicle specific wiring loom, Fitting Instructions & Warranty form.

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What makes this unit any different to other similar products on the marketplace?

Whilst the DPT Chip Tuning product can, like the others be supplied by courier and DIY fitted the key is that by using one of our installers, if you have a Common Rail Engine, you can have the box personalised to your driving style and requirements (within the vehicle tolerance limits). The DPT is a Dutch engineered and manufactured product. All our installers have direct access to the designers and manufacturers of the diesel tuning system. The manufacturer has a pedigree in developing excellence in diesel performance. This pedigree extends to Formula 1 and Formula 3000. In the Netherlands these units have been approved by 38 Mercedes Benz dealerships to fit the diesel tuning chip.

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What effect does the unit have on my vehicle emissions?

Because of the very high compression ratio of diesel engines, typically ove 20:1, the cylinders contain more air than is need for normal operating conditions. By slightly increasing the pressure at which the fuel is injected we make better use of ALL the air available which dramatically increases both the power and torque. As a consequence of this the engine is operating more efficiently, so less throttle is required for any given set of driving conditions, hence the engine uses less fuel and is both more economical and consequently emits less CO2. So your Diesel tuning chip provides better power, torque and improved MPG and CO2.

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How does the DPT work?

For full details of how this diesel tuning product works please see our technical guide . But for a less technical explanation; The modern diesel engine relies upon many sensors within the engine control system to determine how the engine performs and alters its parameters to suit certain conditions, such as; idle, full throttle, heavy load. These sensor signals are all processed many thousands of times a second by the engine's on board computer which which then makes alterations to keep it running at full efficiency.

Because of the very high compression ratio of diesel engines, typically 20:1, the cylinders contain more air than is needed for normal operating conditions. By slightly increasing the pressure at which fuel is injected we make better use of ALL the air available which dramatically increases both power and torque. Also because the engine is now operating more efficiently you will need to use less throttle for the same conditions, hence the engine is more fuel economical.

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What effect will the unit have upon my fuel consumption?

Increased torque means driving will require fewer gear changes and result in lower fuel consumption, typically a 5-10% improvement can be expected. Coupled with a high flow air filter and a fuel treatment the benefit will be enhanced further. In some cases DPT has been programmed to provide up to 16% savings in fuel, making it a potentially major cost saving option for higher mileage drivers.

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Why does the vehicle manufacturer (VM) not set the vehicle up to the levels the DPT

The VM has many different factors to consider preparing vehicles and engine variants to suit varying international markets. So your vehicle for example may have the power output reduced to comply with a specific requirement in one of the VMs key markets. Thus you purchase a vehicle capable of achieving far more BHP and Torque without ANY compromise to the life of the engine. Also VMs fit the same engines into various different vehicles and do not specifically tune for each one DPT achieves optimum tuning for your engine / vehicle combination. Also most other European countries have stricter emission controls than the UK and tune their engines accordingly. Better performance in terms of BHP, Torque and MPG are achievable if the engine is tuned by the DPT unit.

Certain manufacturers do indeed offer upgrades as an optional extra e.g. Mitsubishi.  BMW offer their "Efficient Dynamics" package which again increases BHP , Torque and improves MPG with reduced CO2. But none of these bear favourable as a price comparison to DPT and are not portable in the same way as DPT is.

These examples do clearly demonstrate though that the VMs are comfortable with the concept of increasing the power of their engines. As of course are Mercedes Benz who in the Netherlands have authorised many of their official dealer network to fit DPT units.

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Does the DPT have any detrimental effect upon my engine?

No, the unit simply enables your engine to develop more power & torque, which are contained within the Vehicle Manufacturers tolerance levels so there is absolutely no possibility of damaging your engine. Think of DPT as improving engine "efficiency".

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Does the unit interfere with or reprogramme my ECU?

No the DPT connects between the original ECU and the injection system of your car. The DPT intercepts the data coming from the original unit, re-calculates and optimises the data before sending the modified parameters to the pump.

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If I wish can I switch the unit off?

The diesel tuning DPT unit may simply be unplugged at any point in time and your vehicle will immediately return to its standard settings & performance.

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Why should I use one of your installers?

There are many products similar to this on the marketplace, one of the key issues with the DPT is that all Common Rail units can be tailored to suit your personal driving style or what you would like to get from your vehicle (within your vehicles tolerance limits) this can only be achieved by visiting one of our installers. If you buy as a plug & play you get a great unit at excellent value for money, but you only get the personalisation by visiting one of our installers. Also all our installers are Diesel specialists who can provide excellent advice on how to achieve the best from your vehicle dependent upon what you wish to achieve based upon your driving requirements.

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Does the fitting of a DPT need to be registered with the DVLA as a modification?

No, the unit does not modify your vehicle in any way.

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How long does installation take?

As a DIY job this will be about 10-30 minutes. We provide excellent instructions most of which include full colour pictures to aid fitting. At an installer this will take less time unless you decide to have the tuning personalised. An installer can of course allow you to road test your vehicle and tweak setting to suit exactly what you want from your vehicle.

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What if I need help fitting the unit?

The unit comes with a technical helpline number. Or speak to your local installer if you bought it direct.  We will always work with you to ensure your DPT is fitted to your satisfaction.

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Where can I find my closest installer?

See the on-line database, which includes other facts about your local installer. We now have almost 100 listed installers.

Our dealers are all operated by automotive professionals, some are Bosch Car Service Garages others have specific vehicle specialities. All of them have sufficient skills and knowledge to fit any of our  DPT units to your vehicle. Where possible they will discuss with you what you want to achive from the DPT and ensure set-up to help achieve your objectives.

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My vehicle has 2 wiring loom options, how do I identify which is correct for my

You can tell what version is installed in your vehicle, if  you separate the hardware connection of the diesel pump from the loom of cable and count the number of contacts (8 or 10 pin on some VAG applications) if you are unsure consult a local installer.

Alternatively if you are interested in DPT and wish to fit it yourself, simply telephone us on 01670 706985 and we will offer advice.

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How can I quantify what effect the unit has on my BHP?

Whilst you will immediately feel the additional torque when driving, the only way to quantify the BHP is to have your vehicle put on a rolling road (dynamometer test). We specifically identify installers who can offer this facility and where your local one does not they or we will be able to identify a local source that does.

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What warranty is provided with the DPT?

Two years, each unit has a unique serial number and a warranty form, which should be returned to the address on the card to register the warranty. Whilst the warranty is 2 years there is no reason why you should not achieve many more than this and your unit can be transferred to your next vehicle, if has the same type of diesel engine.

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Will the unit nullify my vehicle warranty?

It only affects the vehicle engine. It is not even an engine modification. It is a retrofit that can be switched off, it does not compromise the integrity of the vehicle. Your ECU is not being re-mapped like many other upgrade options.

In the Netherlands where the units were designed and are manufactured 38 Mercedes Benz franchised dealerships fit these units in their Mercedes Benz workshops. DPT is similarly fitted by Kia & Hyundai dealerships in the Netherlands.

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Why should I also fit a performance air filter?

Increased airflow will improve engine performance and increase fuel economy . A filter such as the K&N which we can supply will help achieve high air flow. We sell all K&N filters at 5% off K&N RRP. If you require a unit simply select at checkout to "express an interest", we will advise you by return e-mail the price and you may then make a decision about making a purchase.

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Why should I use a fuel additive?

An Additive used periodically cleans and lubricates the fuel system, particularly the injectors improving performance and fuel consumption.

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Should I advise my insurer?

We always recommend you advise your insurer of any change in your vehicle or personal driving circumstances.  DPT is now a recognised product with NIG, Norwich Union and Fortis Insurance, someof the worlds largest insurers. To find out how to benefit from this relationship please telephone us.

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How can I contact Randstad Directly?

You can contact us directly by visiting our contact page on this very site.

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