If you have OBDFusion that came with the Kiwi you can do some logging but the only graphing you will get is on the device or a csv file which is a pita to read without graphs. OBDfusion is AKA OBDlink and I have a thread with my current setup in the datalog section. Logging looks pretty straightforward let me know if I need to walk you through it.
Someone recently put up a page that will auto convert any CSV file to a graph so that is an option as well. Maybe someone with a better memory will post the link.
The OBD programs are handy for some things like basic troubleshooting and pretty gauges but they lack the resolution and software package SCT offers. For a problem where things are happening very quickly (high rpm miss for example) and you need to log many parameters SCT is the only way to go IMHO. You might want to consider buying a used X3 or X4 for logging.
I run Torque, Dashcommand, and currently OBDlink (Fusion) for basic stuff and gauges but when logging for a tune or if I had a critical issue i would fire up the X4.