I have a DashDaq that I bought from Needswings. It plugs in the OBD2 port under the dash just past the hood release. I data log engine coolant temp, timing advance, speed, rpms, throttle position, boost, IAT's. You can log a whole bunch of different things. If nothing else you learn a lot about the car. For instance how timing is pulled and the throttle is partially closed at WOT shifts.

Les