When I had my SRT4 that thing was pushing about 350whp, and its only 250-300lbs heavier, and that was perfect in that thing. So I think 250 is totally manageable. Just going to depend on everything else (motor, axles, clutch) Just my humble opinion.
When I say "programming" I mean that there is no compatibility between NA cars and euro/global-spec Fiesta STs. If the Racechip you try to use is made for a mass air flow vehicle (MAF), it will not work on a manifold absolute pressure (MAP or speed density) based vehicle. Most of the operating map perimeters will not only be different, but also the specified ecu "language" could be different as well. It's important to note that UK/Euro/Aussie/SA vehicles also have much different octane requirements than NA spec vehicles (they have access to higher octane pump gas than we do).
That's why Cobb has not released an AP to global customers yet.
When I say "programming" I mean that there is no compatibility between NA cars and euro/global-spec Fiesta STs. If the Racechip you try to use is made for a mass air flow vehicle (MAF), it will not work on a manifold absolute pressure (MAP or speed density) based vehicle. Most of the operating map perimeters will not only be different, but also the specified ecu "language" could be different as well. It's important to note that UK/Euro/Aussie/SA vehicles also have much different octane requirements than NA spec vehicles (they have access to higher octane pump gas than we do).
That's why Cobb has not released an AP to global customers yet.