The mission of the Burning Plasma Experiment is to determine the physics behavior of self-heated fusion plasmas and demonstrate the production of substantial amounts of fusion power. There has recently been substantial progress in the characterization of confinement in tokamak experiments, which increases confidence in projecting to the BPX tokamak design. Updated confinement scalings are now available for both L-mode and H-mode enhanced confinement regimes. The principles of dimensional analysis are being applied to project the performance of BPX from specific discharges in tokamak experiments with similar aspect ratio, elongation, q-value, v*, β, but scaling with ρ/a. Theory-based transport models for use in one-and-one-half-dimensional transport simulations have been calibrated against a wide variety of plasma profiles in L- and H-mode plasmas and are now used to simulate BPX.