F-16C performance vs. F-16D performance

[idahosurge]

Hello,

I have installed Kirk Olsson's great F-16 family of planes.  The F-16A/C performs a lot better than the F16-B/D and I would like to know what file controls performance?  I have compared the aircraft.cfg files and even changed the aircraft.cfg file on a D model to be the same as a C model and the D still does not perform like the C.  I know that in the real world the D maybe not perform as well (single seat vs. dual seat), but I would like mine to perform better.  An example would be the C will go over 990 mph and the D will not get past 858.  So, what file controls performance?  Is it the model file and if it is what do I need to open a model file so I can compare two files and modify as I like?

Regards,

Rod