Method for dynamically measuring the unbalance of the rotor of a turbocharger core assembly, in which the rotor comprises a turbine wheel, a compressor wheel and a shaft that is mounted in a central housing of the turbocharger core assembly, characterised by the steps of: arranging a turbine housing and a compressor housing on a machine bed at a mutual spacing that forms a gap, fastening a first bearing element to the side of the turbine housing facing the compressor housing, using axially and radially resilient means, fastening a second bearing element to the side of the compressor housing facing the turbine housing, using axially and radially resilient means, positioning and retaining the turbocharger core assembly in the gap and between the first and second bearing element (16, 25) of the turbocharger core assembly by means of a retaining device that engages with the central housing, reducing the spacing between the turbine housing and the compressor housing, and clamping the central housing between the first and second bearing element (16, 25) such that the central housing is resiliently mounted in at least two spatial directions, and the compressor housing encloses the compressor wheel, and the turbine housing encloses the turbine wheel at a spacing that permits spring movements in at least two spatial directions, removing the retaining device from the central housing, arranging at least one oscillation sensor for measuring the oscillations of the central housing, connecting the turbine housing to a compressed air supply and accelerating the rotor to a substantially normal operating speed by driving the turbine wheel using compressed air, measuring the oscillations, induced by unbalance, at the central housing while the rotor rotates at a substantially normal operating speed, determining the phase position of the oscillations, induced by unbalance, relative to the angular position of the rotor at the measuring rotational speeds at which the oscillations induced by unbalance are measured, using the measured oscillations, induced by unbalance, and the phase position, in order to determine the unbalance of the rotor to be compensated. arranging a turbine housing and a compressor housing on a machine bed at a mutual spacing that forms a gap, fastening a first bearing element to the side of the turbine housing facing the compressor housing, using axially and radially resilient means, fastening a second bearing element to the side of the compressor housing facing the turbine housing, using axially and radially resilient means, positioning and retaining the turbocharger core assembly in the gap and between the first and second bearing element (16, 25) of the turbocharger core assembly by means of a retaining device that engages with the central housing, reducing the spacing between the turbine housing and the compressor housing, and clamping the central housing between the first and second bearing element (16, 25) such that the central housing is resiliently mounted in at least two spatial directions, and the compressor housing encloses the compressor wheel, and the turbine housing encloses the turbine wheel at a spacing that permits spring movements in at least two spatial directions, removing the retaining device from the central housing, arranging at least one oscillation sensor for measuring the oscillations of the central housing, connecting the turbine housing to a compressed air supply and accelerating the rotor to a substantially normal operating speed by driving the turbine wheel using compressed air, measuring the oscillations, induced by unbalance, at the central housing while the rotor rotates at a substantially normal operating speed, determining the phase position of the oscillations, induced by unbalance, relative to the angular position of the rotor at the measuring rotational speeds at which the oscillations induced by unbalance are measured, using the measured oscillations, induced by unbalance, and the phase position, in order to determine the unbalance of the rotor to be compensated.