KCPerformance BV - De Dijk 6 - 5268KA Helvoirt - Netherlands info@kcperformance.eu +31 13 30 30 000
+31 13 30 30 000



A blown engine is more powerful than the contents of the engine alone. This makes it possible to make engines smaller or the capacity of larger engines even higher. A blown engine is often more efficient than a motor without a turbo or compressor.

A turbocharger or turbocharger is an air pump that increases the air pressure in the combustion chamber and is driven by the hot exhaust gases.

A turbo consists of a turbine side and a compressor side, where the turbine uses the energy of the exhaust gases in the exhaust manifold to drive the compressor on the intake manifold. With modern engines, almost always two different types of turbos are used: waste-gate controlled turbos or variable geometry turbos.

The pressure in the waste-gate controlled turbo is determined by whether or not the waste gate is partially opened, this ensures that the turbo does not generate too much pressure or overruns. The variable geometry turbo is also known as VNT (Variable Nozzle Turbo) or VGT (Variable Geometry Turbo). There are small blades around the inlet part of the turbo. These are controlled by a vacuum or ECU actuator. These vanes close at low speeds and narrow the so-called cochlea, as a result of which the pressure increases faster, resulting in more torque at low revs. At higher rpm the blades open and we get a larger cochlea, resulting in more torque at a higher speed.

With modern engines, we see more and more that both types of turbos are combined in a Bi-turbo or even Tri-turbo setup. With both diesel and petrol engines, we regularly see faulty turbochargers due to deposits in the turbo. The cause of this is often a problem with the EGR system, diesel injectors or pump injectors. The soot may cause the turbo to jam, block the waste gate or cause the variable geometry mechanism to get stuck. Also bad quality, wrong or old oil can cause the turbo no longer (well) lubricated causing it crashes.


  • Insufficient lubrication due to poor quality or old oil
  • Age (wear)
  • Mechanical defect
  • Electronic defect
  • Variable geometry mechanism remain stuck
  • Waste gate remain stuck
  • EGR problems (pollution)
  • Wrong installation


KCPerformance can overhaul your defective turbo or replace it with a standard turbo. We can of course also supply a new turbo that meets your needs. Based on your car, use and applications we advise which turbo configuration is the most suitable. The possibilities are endless: a new standard turbo, a turbo overhaul or a custom turbo, an upgrade as desired.

With a modified turbo we can choose a completely new, larger turbo or a hybrid turbo. In a hybrid turbo we design and build a new, better turbo based on a standard turbo by adjusting the geometry of the turbo, installing larger paddle wheel (s). For each of the options, the software for the control can be written to measure. This way we can determine all characteristics of the turbo.

If we opt for the installation of a larger turbo, there are also possibilities to tailor a manifold, intercooler, downpipe and software. Our expertise extends from classic turbos to the most advanced, variable geometry and twin-scroll turbochargers.

For atmospheric engines, without turbo, we can convert them to a pressure-filled engine by adding one or more turbos. We can also develop and manufacture all additional technologies often used on turbo engines, such as intercoolers, downpipes, dumpvalves, injectors, connecting rods and camshafts.


  • Improves performance by 15 to 30%
  • Uses the lost energy of the exhaust gases
  • Turbo engine takes up less space than an atmospheric engine with the same power
  • Behavior of the engine can be made to your liking (for example, comfortable and smooth driving or fast and strong acceleration, or the right balance between them)
  • Turbo engine is more quiet than an atmospheric engine with the same power (the turbine side of the turbo has dampening effect on the exhaust noise)