Ah, the xcal2 would be sweet for the super anal to get their tune down to near perfection. It would be good once you have your tune just about right though, and only then.
With the Raptor, you can only see your datalogged info in graph or spreadsheet form on your computer. I'm guessing it's the same deal with what you are able to do with the xcal2 when linked to your computer.
This is the only way to go about changing your tune until it's "just about right" IMO.
Anyway, sorry about the hi-jack
IMHO, most would probably like the xcal2 version of SCT's PRP. I like the burner/raptor version.
