what do you want to log roger?

if you don't mind splicing into the ecu loom (or getting a SECS monitor cable) you can log directly most things like throttle pot, map sensor, etc cos they're basically 0 - 5V signals.

there's many universal dataloggers out there that you could use, it all depends how many channels, how quickly, and to what medium you want to log to, and how much you want to spend.