Recent investigations have suggested important benefits in using a turbulent mixing jet impinging into the molten pool of a continuously cast Al4.5Cu ingot . It was for example demonstrated that such jet can significantly modify the macrosegregation patterns found in large castings. One possible reason put forth for this modification is the ability of the jet to suspend previously sedimented grains from the ingot centerline. In this study, we propose a model to optimize the re-suspension of grains through the use of an engineered jet. A series of full scale experiments are reported using a variety of jet powers. The results of this study indicate the potential to not only reduce the degree of centerline segregation, but also optimize the jet performance for a variety of casting practices and alloys. S.R. Wagstaff, and A. Allanore: Light Metals, TMS, 2016, pp. 715-720.