Many of the "spoon" and "mugen" chips out there disable many of your sensors and engine safeguards in order to squeeze out every last bit of power and prevent a car from losing power on the track, even if it has severe damage.
What people sometimes forget is that these engines are rebuilt after EVERY race! They don't give a flying rats ass about the condition of the engine as long as it puts them on the podium at the end of the day.