turbodruk

Turbodruk is the boost pressure produced by a turbocharger in an internal combustion engine. It refers to the amount by which the intake manifold pressure exceeds the ambient atmospheric pressure. Turbodruk is typically expressed as gauge pressure in units such as bar or psi and is a key parameter for engine performance, efficiency, and tuning.

A turbocharger uses exhaust gas to drive a turbine connected to a compressor. The compressor forces more air into the engine, increasing air density and allowing more fuel to be burned for greater power. Boost is regulated by devices such as a wastegate, variable-geometry turbocharging, or an electronic control unit, and is often aided by an intercooler to reduce the temperature of the compressed air. Effective turbo operation can introduce turbo lag, which is the delay between throttle input and boost buildup.

Measured and controlled boost pressure is typically obtained from a MAP (manifold absolute pressure) sensor or a boost gauge. Values are commonly quoted as gauge pressure relative to ambient. In standard production engines, targets for turbodruk generally range from about 0.2 to 0.8 bar (3 to 12 psi), while high-performance or diesel engines can operate at 1.0 to 2.5 bar or more. Excessive turbodruk increases the risk of knocking, detonation, and engine damage, so modern engines limit boost through calibration and safety margins.

In Dutch-language automotive literature, turbodruk is the standard term for boost pressure in turbocharged engines. The concept is related to, but distinct from, compressor efficiency or pressure ratio, and it is a central factor in engine tuning, reliability, and emissions considerations.