Yup, but in this particular case a physical model would really be a lot more suited for the task I think. Correct behaviour is wanted throughout the operating envelope and also in abnormal conditions such as hung/hot starts. Not to mention that creating the tables without access to complete OEM engine data is quite a bit of work!
The way the prototype is coming along, it's going to be a much simplified physical model, assisted and adjusted by tables and formulas here and there as needed.
Thank you both for your suggestions.
Cheers,
/ft