This EFR8374 is not a bad turbo for an STI. Given the size compared to the 7670, the spool is pretty good. In 3rd gear, over 25psi at 4150rpm, 16psi at 3500rpm. First graph has Pre Intercooler(RED) and Post Intercooler(WHITE) pressure, as well as Exhaust Backpressure(Yellow) and RPM (Green).

Second graph is a scatter over a drive, and you can see a 4th gear pull does even better with 25psi at 3780rpm. That is fantastic for a 79lb/min turbo.

The biggest gain in spool during calibration came from lots of intake cam advance and exhaust cam retard.