Yes and no. Ecutek has a ''user-tune'' feature in which you can make global timing/fuel adjustments. By global i mean if you add a degree it adds it across the board for the whole map.
This feature isn't available with all ecu codes. I believe the tuner also has to activate this feature for you to be able to use it.
I would recommend a custom tune. I personally don't like the global adjustments and would only use it to make the tune safer and not to get more power. Good luck.