you have a dom3xtr in that plot....not a 2.5xtr.
but yes, running a dom3 out to 6600rpm at 21psi on e85 is a pointless waste of a setup. if it was taken out to 7600 at 26psi and you enjoyed the extra power...then you can justify it. but the way thats setup is a waste....he was most likely out of fuel pump or injector adn they called it.