Good points by all. And as highlighted, if you know the risks and are prepared to accept them then there isnt a problem.
My comment in relation to Ford was more to do with them claiming your warranty null and void if they knew what you were up to. They wont know unless you tell them. Although you always hear stories...so pays to be somewhat cautious. Also in relation to Ford, does anyone know if the
ECU has a playback or blackbox feature so that they can see the engine parameters if the engine was to go bang. In regards to ancilliary parts, it would be near impossible to tell as the parts would die over time, not just go bang. As Teki said, the part just failed.
Interesting point tho, if you told them you drive the car hard, would they claim you abused it? Although it is a Fiesta we are talking about, maybe a different story if it was an XR6T or GT or something like that.
With engineering processes today, I doubt anything we do to the Fiesta would kill it. Its not like the driveline is being subjected to large amounts of power..lol In these types of cars, it would easy to build in a mechanical tolerances for the parts. Unlike for example and XR6T, wind the boost up and it may go bang!