I have great respect for any attempt at 200mph in any car in a Fiesta its , I know the bits that fell off mine in the early days & the bonnet corners bending at 200mph things you cant find out untill you try it. Keep us informed of this but please take care it really is not as simple as it seems.

A quick look at the facts then we can all judge if its likely to happen.
The least Power to achieve 200mph in 15 years of Vmax is a Porsche with 640bhp within the confines of a UK airfield. Is the aero of a Porsche better than a Fiesta ?. Remember weight makes no difference.
Martin managed 188.7mph with 513bhp but required over 700bhp to hit 200mph after a few runs so not easy.
Martins 194.7 record with a mere 627bhp is IMO the nearest optimum run by any Cossie ever beating that will take a monumental effort.
Love it get on & give it a bash .