VGT turbochargers have been used predominantly on Diesel engines rather than gasoline engines due to the complexity of the mechanism and the lower exhaust gas temperature limit. A VGT turbocharger has been tested on a 2.0L gasoline engine. In order to avoid the constraints of using a feedback controller, a range of open loop VGT actuator trajectories were investigated to optimise the first 1.5 seconds of transient operation during an engine load step change from 2 bar BMEP to full load. Compared with fully opening the VGT at low load operation point before tip-in, the steady state turbocharger speed was increased by 11 krpm (138.4%) by fully closing the VGT, whilst the fuel consumption was maintained the same considering the measurement accuracy.