So... How do I make the POWER!!

Heres the short explanation... Under normal operating conditions, most diesels run with a large surplus of air relative to the amount of fuel injected. Of course, burning extra fuel takes air, and diesel engines, while much more forgiving than spark ignition engines in this regard, do have a limit to the amount of fuel that can be burned for a given quantity of air. As this limit is approached, more smoke will become evident in the exhaust, which is the result of unburned or incompletely burned fuel.

Most modern diesel engines, as a rule, are designed to run with surplus air as a "smoke buffer" which limits visible exhaust smoke in order to help with emissions certification. This is because the "average Joe" with a TDi may not pay very close attention to fuel quality, maintenance issues, or the other factors that could influence exhaust emissions, so the emissions controls are designed for the least common denominator.

If you are reading this, however, you are probably not the average TDi owner. This surplus air can be used to the enthusiast's advantage in the quest for more power:

To make more POWER it's simple........ add more fuel!!

More flow = More POWER!! (to a point)

Generally new injectors with higher flow are the easiest and safest way to accomplish this. Usually up to 25% more fuel can be added with no adverse effects on the engine and very little, if any, exhaust smoke. This is very commonly done with great success. Even higher levels of fueling can be safely realized with the POWERPLUS versions because of the advanced design. 

Keep in mind that modifying your car's fuel system outside of OEM specs could void any manufacturers warranty, and result in noncompliance with regards to federal emissions regulations. Generally the upgraded nozzles are intended for off highway use only, and should be installed by a competent individual. The OE replacement units should NOT void any warranty however, and in fact regular testing and replacement is recommended to keep your motor in peak operating condition.

Most diesel mechanics recommend having your injectors (even the OEM ones from VW or Bosch) tested at 50,000 miles and every 10,000 miles thereafter. We are finding that significant degradation starts to occur in the OEM injectors at around 50k miles and they are usually on their last legs after about 100k miles. New Bosio nozzles wil refresh your injectors to better-than-new performance.