This may be prohibitively difficult, but could you add a bit of scripting to allow a user to 'search' for certain engine specs?
Example: I'm trying to recreate the D16A6 engine in the XFG. It's a whole lot of trial and error to get the hp, torque, AND peak rpm values correct by modifying the settings given.
My proposed feature:Allow the user to enter a 'desired' hp, torque, and peak rpms, then have LFSTune do a search for a combination of the "General HP", "Torque", and "Powerband" settings that get somewhat close to the desired values.
I guess you'd have to have some scripting to trigger LFS to recompute the hp and torque values, and that seems like it'd be the hard (possibly impossible) part.
Anyway, love the program. Thanks a lot.