I ready the posts from Ron (they all helped me.) but I was with doubt in one pointthe .AIR table 1032 has a EPR calibrate, and the EPR rate of change.so, has a variablethe token variable is TURB_ENGINE_1_EPRthis variable is accurate?

No Ron and I figured the EPR model in .air was useless. I did a model for the JT8D and correlated it with MN and I think N.The EPR in the DF722 will have used a gauge to get good accuracy.That air table is quite useless I am afraid.Ian