Hi guys

In my focus I have a 1.6 and I think it is the Zetec se engine. (Mk1 x reg)
This is my everyday car so not trying to get lots of power obviously. But im interested in knowing the limits of the engine. I heard the bottom ends are weaker than the Zetec s engine?
How much power can the engine internals take before major work (forging etc) is needed? Pistons, con rods etc. and also, are they similar to the Zetec s 1.6 engines in the Fiesta’s. I believe there are, just some small differences?

Cheers all.