The Innovate Motorsport LM-1 has an internal data logger that saves data recorded at about 3x per second (I think). It comes with software that you load on you home PC to look at graphically, and/or you can attach a meter to one of it's outputs to see AFRs real time. It will save up to 44 minutes at a time. The problem is that you have to buy the LM-2 (rpm converter) to look at AFR with respect to engine RPM.
There are other AFR measurement systems out there with various cool features and I haven't decided on one yet. It looks like one is going to set me back around $400 to get everything I want. Ouch.

That sounds about right,That is what Mark uses also.ya might ck with him on the thremacouple/sensor.Let us know what ya find out????

Rob

When you log you are also going to need to record the map. That also comes into play if you are trying to program off site.

Oops...possibly another flaw in my thinking (or lack of thinking). Precision will probably need the spark advance curve also, which is much trickier to record.