Smolik et al. [7] done investigation of bearing clearance effects in dynamics of turbochargers supported with two floating ringbearings. Results indicated that the outer clearance and the ratio between the inner and the outer clearance affected the amplitudes ofsub-synchronous components in rotor’s response. Dyk et al. [8] investigated the influences of various analytical descriptions of hydrodynamicforces on the dynamics of turbochargers supported by floating ring bearings. The closed-form approximate analyticalsolutions were exploited. The main contribution is the utilization of the full spectrum in order to analyze turbochargers nonlinearvibrations. Peixoto et al. [9] studied the coupling effects on the lateral dynamics of turbochargers supported with floating ring bearingand thrust bearing, considering with the nonlinear behaviors, including the temperature variation in the oil films. Researches indicatedthat the effects of the temperature variations in transient analysis of oil film would reduce the bearing load capacity, neglecting