A turbocharger turbine operates under unsteady conditions due to the pulsating nature of the exhaust gases. In consequence, twinentry turbines are generally designed and used for better energy extraction from the pulsating exhaust gases. Twin-entry turbine allows the pulsation in the exhaust gas to be sustained, by separating the banks of the manifold till it reaches the rotor/nozzle inlet. In doing this, the higher isentropic energy in the pulse can made available for the turbine to be extracted. However, pulsating flow creates unique operating characteristics in a twin-entry turbine, in comparison to a single-entry e this is further amplified with the variable geometry configurations. The staggered pulsation in both the entries, due to sequences in the exhaust valve opening, means the turbine is operating in a combination mode of mostly unequal and partial entry conditions. Thus, there is a need for experimental work to understand the unsteady-state performance of a twin-entry variable geometry turbine in various operating conditions, in comparison to the single-entry and nozzleless unit.