Over the years we have built up a library of technical articles that are specifically written with direct injection and turbocharging in mind. We have just added a Fiesta ST specific article as we build up our development vehicle:
http://stratifiedauto.com/blog/making-your-fiesta-st-handle-even-better/
Have a look at our tech articles if you haven't already. Things like the discussions on the fuel system, ignition corrections, wastegate actuators etc. very much apply to the Fiesta.
https://www.stratifiedauto.com/index.php?main_page=page&id=20
If you have questions, post them up or get in touch with us, we are more than happy to answer them and discuss.
http://stratifiedauto.com/blog/making-your-fiesta-st-handle-even-better/
Have a look at our tech articles if you haven't already. Things like the discussions on the fuel system, ignition corrections, wastegate actuators etc. very much apply to the Fiesta.
https://www.stratifiedauto.com/index.php?main_page=page&id=20
If you have questions, post them up or get in touch with us, we are more than happy to answer them and discuss.