Good info I was researching data logging too recently.
I found with a little effort on my part I can just use my phone/w app, ODB-II reader , and some software to put together a video (from my gopro) with all the relevant info I would need.
OBD-II Hardware - Palmer Performance Engineering, Inc.
https://play.google.com/store/apps/d...g.prowl.torque
DashWare - Telemetry Data Overlay on Your Videos