Rod, until SOMEONE comes out with a secondary injection system, I think the AEM is a reasonable option. If you were to run pump gas (E10 93oct) in the tank, then use E85 in the wmi or run a very fine tuned twin nozzle on methanol, I think you'd be able to make 330whp ( anyone guess where I'm pulling that number from? Lol ).
Despite ATP's 330whp and the recent 310whp GTx graphs, I'm finding the fuel system is gonna be hurting on any type of ethanol mixes. I guess if consistently race gas is in your budget, its not a big deal, but i need my ethanol, lol.
I would just hate to see the car be heard back a crazy amount because the fuel system or make 330-360whp on race gas, but be forced to 310whp on pump gas without the option for ethonal to be mixed in the tank.
Good news is.... I haven't seen the fiesta have any of the bottom end fueling issues the focus has with the fuel pumps turned up, hope you won't either. We pretty much already have a build in "kenny bell boost-a-pump". I'm impressed with how much an alcoy injection setup can impact the cars AFR, but then again, I was used to a 2.4L, this 1.6L should be easier to impact afr wise.
Anyway.... I'm thinking this thing is gonna be NUTS. Best turbo, best intercooler, and a bad ass tuner ( Russ has helpped me a lot behind the scenes ).