I don't think it's likely you were seeing 14.5 psi stock in the summer, I don't think I've logged 13 with stock tuning during over-boost? I assume something was going on with the way the pressure was being read. I think 12 is closer to the intended over boost? in time ill log what the stock programming targets.
BSM 1M, Motion Control Coilovers, JB4 G5 ISO, BMS E85 Flash, ECS CF sealed intake, N54 Tuning DP's, N55 Mid Pipes, Evolve Race Midpipe Back Exhaust, Wagner FMIC, Stett CP w/ Tial BOV, CDV, Performance Steering Wheel, Big Tires on CH-R's.