Not sure. I tried entering a 'user PID' in Torque Lite the other day and it wouldn't use it. And it was one of the standard 'legislated diagnostics' even! Makes me doubt the functionality of the user pids in the lite version.
I just tried entering an equation in Torque Lite. Can't be sure if this is a bug in the program or is it intentional to reduce the functionality of the free version but the evidence is clear that the equation is being altered as seen in the error message!!