I'm thinking of either getting JAW or Zeitronix widebands to datalog AFR, RPM, and Boost so that I can tune to something at least (until datalogging comes for the PRP). Anybody using JAW (Just Another Wideband) which you can build from
14Point7 It seems like the more economical route considering I'm already in this a grand going with the PRP... Probably could get it all assembled for about $140 including the wideband.
The Zeitronix is inexpensive route as well, starting at $279 for a datalogging controller (inputs for MAP, RPM, EGT, and one other sensor), the datalogging software, and of course the wideband.
Advantage of JAW is that I could get the .NET source for the datalogging software and make changes to it if need be (from the screenshots it looks like things like RPM, boost and AFR are all graphed on top of each other with time being the x axis, whereas I'd be interest in mapping boost and AFR accross RPM, that seems a little bit easier to read to me.)
There are probably more things you would need to datalog that would be useful (especially to tune timing), but either of those options would be an inexpensive good start I think and probably my only options since I don't have much more money to spend.
Charley