So the mk3 came with,

1.8 Duratec i4
2.0 Duratec i4
2.5 Duratec v6
3.0 Duratec v6

The 2.0 is the same engine as the st150 but it's only 5bhp up on the Mondeo so not worth the bother. The St150 uses the Mazda ecu. Both will do 200 by freeing up the induction and exhaust but that's not going to feel quick in a Mondeo.

The Mazda 3+6 MPs is a 2.3 stroked and turbocharged version of the 2.0 and should bolt in and give you the power you want but they are rare and expensive over here.

The 3.0 v6 from the st220 is erm 220bhp ish but it feels slow compared with a boosted car with the same power and 2/3 the weight. I.e. I have an st220 and a Megane 225 and you can't beat some boost.

The 3.0 v6 is what Nobble used with a couple of turbos to give around 400bhp. It just used 1mm shorter forged rods.

(If you find some let me know)

As above the Volvo/ Ford 5 pot fits between the legs of the mk4 so will likley do the same in a mk3 but check out engine manegment systems for a five potter before you start.

If you can fabricate stuf then pic any engine that makes the power your looking for and bung it in the hole. Don't forget a project thread with lots of photos.

What I want to know is, has any fitted a 2.0 Zetec ? ?