A unified formulation is presented for modeling the injection molding of isotactic polypropylene (i-PP). The crystallization kinetics are based upon the differential Nakamura equation in which the characteristic time is dependent upon temperature, pressure and flow-induced shear stress, without any explicit need for an induction time. A Cross/WLF model is used to represent the shear viscosity in which eta(0) is dependent upon temperature, pressure and crystallinity. Use is made of a recent correlation for the PVT behavior of i-PP with an explicit dependence upon crystallinity. A finite-difference implementation of the modeling is applied to two independent molding experiments available from the literature, with notable results concerning the late-time cavity pressure traces and time-dependent gapwise shrinkage prior to ejection.