FAQs

What is the Process for Nozzle Set-up and Calibration on a PD Unit Injector?cross graphic

Nozzle Set-up and Calibration, PD Unit Injectors.

Disassembly, Inspection and Nozzle Mounting for PD Injectors.

Unit injectors incorporate the nozzle assembly and a built in high pressure pump producing injection pressure of up to 2000 Bar. Similar to that of a common rail system but with the fuel “rail” chamber only needing a supply pressure of 2.0 Bar. The PD system greatly increases the precision and control over combustion when compared with older fuel injection systems. Specialist equipment is needed just to be able to strip and inspect the injectors due to the complex set up of internal locating plates and pins. With every service we provide a complete strip and inspection of the injector. Parts are then ultra sonically cleaned and worn parts replaced. A nozzle of choice is then assembled into the nozzle assembly holder and NOP1 is setup to insure the most precise calibration of the injector. We are able to set the PD injectors back to OEM specifications or, for custom or race applications, we can provide a custom pressure setup for your specifications.

Testing and Calibration.

The complete injector is then reassembled and mounted into the 555-2N Injector-Pump System Cam Box and run on our test bench connected to the 555- 24LX/EVO Simulator. The following areas of the injector are tested,

  • Effective Injection Time in ms
  • Nominal and Effective start of injection
  • Nominal and Effective end of injection
  • Current peak absorbed by the electrical solenoid and error message if value is exceeded
  • Peripheral Speed of drive shaft whilst pumping
  • Test Fluid Temperature measures at the Nozzle Outlet with a maximum protection value
  • Visualization of “0” setting for both Cam and the Rotation Mode
  • Atomization characteristics at Start Of Injection

Once the injector has passed either OEM or custom setting specifications the injector is marked with its unique identification number. A performance printout can be supplied on request. All injectors supplied will have a set of new fitment seals and the necessary washers. 

What percentages of paraffin or heating oil will the DIESEL-SURE test kit detect in diesel?cross graphic

EN 590 DIESEL-SURE TEST KIT Patent pending

It all depends on the specification of the diesel fuel that you are testing but an estimate is as follows: Paraffin 18% to 20%
Heating oil 28% to 30%

We do recommend that the DIESEL-SURE test kit is only used as a guide and should you require a more accurate result that the fuel in question is sent to a fuel laboratory for a full analysis.

 

What were the test conditions regarding the PD body flow tests?cross graphic

FAQ Image

The same DSSR 130+ nozzle was used in the 3 PD bodies. NOP 1 (nozzle opening pressure) was set to 300 Bar. The stock bodies were left as is and our standard test procedure was followed. The results have been documented as "test results for PD body flow rates"

Testing and Calibration.

The complete injector was then reassembled and mounted into the 555-2N Injector-Pump System Cam Box and run on our test bench connected to the 555- 24LX/EVO Simulator. The following areas of the injector are tested,

  1. Effective Injection Time in ms.
  2. Nominal and Effective start of injection.
  3. Nominal and Effective end of injection.
  4. Current peak absorbed by the electrical solenoid and error message if value is exceeded.
  5. Peripheral Speed of drive shaft whilst pumping.
  6. Test Fluid Temperature measures at the Nozzle Outlet with a maximum protection value.
  7. Visualization of “0” setting for both Cam and the Rotation Mode.
  8. Atomization characteristics at Start Of Injection.

Probably what will be more relavent is how we achieved the fuel specs.

Low Delivery - Cm3 Fuel delivery x 200 strokes at 300 RPM bench speed.

Full Load Delivery - Cm3 Fuel delivery x 200 strokes at 600 RPM bench speed.

Please see the attached document for the full test plan

Read More Information (file download)

What will happen if a diesel engine is run on paraffin?cross graphic

EN 590 DIESEL-SURE TEST KIT Patent pending

There are reports of diesel engines that have run for hundreds of kilometres on unadulterated paraffin, however, there are many cases where failures have occurred within a very short period. What is indisputable is that paraffin will ultimately damage a diesel engine.

Firstly, paraffin has a lower viscosity and inferior lubricating properties compared to diesel. Thus, fuel delivery pumps (which must be lubricated by the fuel they pump) will last only a fraction of their normal lives and injectors will wear faster and have an increased chance of blocking. Secondly, paraffin reduces the flame point and cetane number of diesel and causes the engine to run at a higher temperature, often damaging engine components.

 

What's in the box?cross graphic

<img src='http://www.uniteddiesel.co.uk/images/images/larry-checking-parts.jpg' />

Why are Injectors Failing?cross graphic

This is a article that I found on the internet written by D. G. Quirk. It is a good insight to the problems that I am experiancing with injectors today. I have tried contacting Dave to get permission to use his article but am unable to contact him.

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Why choose DSSR products.cross graphic

There is a lot that goes on behing the scenes of nozzle manufactures that we don't know. We as passionate performance diesel guys want the best and hope that our passion is similiar to that of the manufactures but I do not believe that this is the case. I am sure that it all starts this way but the economics of business lead companies to shift their focus.

I honestly believe that DSSR and still very passionate about the performance and tuning market and the parts that they supply are totally dedicated to making diesels perform better so with their products and our passion we are able to supply you bespoke products to enhance the performance of your diesel vehicle.

Have a look at the attached file.

Read More Information (file download)

Why choose United Tuning?cross graphic

Having been in the motor trade for 4 generations, established in Shrewsbury since 1992, we understand the importance of quality, service and credibility this is why we have become the Shropshire agent for Viezu Technologies.

Award winning tuning services, Viezu is the UK’s only ISO certified tuning and training provider, who are are approved and used by the largest fleet and industry professionals across the world. All tuning is insured and comes with our money back promise.

Viezu tuning and ECU remapping is dyno developed, and emission tested, which is a legal requirement. All our tuning is custom and developed with years of research and development, giving you the choice of the level of tune you want. Be it performance or economy tuning, we have the ability to reach your exact requirements.

Why don't Vehicle Manufactures Tune their Vehicles?cross graphic

The most common of all tuning questions, it is not complicated, but there are a few answers to this question, some more obvious than others.

Vehicle manufactures are in a tough position here, they have to build one vehicle for all drivers, it’s a bit like a nice suit off the shelf, it fits well, its looks smart, but it can’t be custom tailored for the end customer, tuning is just the same, if you own a fleet of vans you may want a speed limiter or rev limiter added to help save your fuel, yet another customer may want a little more power to help with towing, or heavy payloads, these sort of changes can only be made once the vehicle is built and the customer needs something other than off the shelf

Fuel quality, we are often asked to tune for different fuel quality, either higher or lower, once an owner knows where his vehicle will be used and what it will be used for, we can adapt the tuning for environmental, altitude and fuel quality.

And surprisingly, many manufactures do offer ecu remapping services, any showroom these days will be full of eco tuned vehicles, often sporting a “blue” badge, just like our BlueOtimize tuning, with our tuning though, you don’t need a new vehicle to benefit from economy tuning.

In addition, many manufacturers offer power and performance tuning upgrades too, or offer the same engine in a range of vehicles offering different power levels, this enables customers a choice, taking account of tax banding, insurance, performance, price and economy, In most cases though the choice is controlled with software, just like our tuning, but with Viezu you don’t have to decide what you want from new in the showroom, we can tailor your vehicle to your needs whenever you want.

Will my Fuel Consumption go up After an Upgrade?cross graphic

No, in fact quite the opposite, even on a performance tune, if you continue to drive the car in the same way as you did before the upgrade, your fuel consumption will probably improve. Of course if you have a track map installed on the car and you are driving the car under the conditions with which a track map is intended you're likely to find a slightly reduced mpg figure.

Economy tuning can have a dramatic effect on fuel consumption, with considerable improvements being achieved along with huge money savings on fuel. All Viezu fuel economy tuning has a money back promise, if you are not delighted – you don’t pay for the tuning.