But the beauty of a Duratec is that its plug and play, set of throttle bodies an behold 200bhp, if your gonna start changing internal components you may aswell swap the engine!!

Swap is a lot more expensive, and as you probably read on the link, they went 200+, and no engine breaking, lower compression ratio a notch and i think it would hold turbocharging nicely too.

Edit: i was reading about the latest part on mazda forums, they said rods are the weakest link, but they are safe to 10psi. I'd go for no more than 8psi to be safe, but with relatively high compression and 8psi the power is already there. I'll keep on researching, as my next car might have a Duratec in there.

You would need to change not only the rods, but pistons and you might even need to work on the crank. The 203 Kit is gonna cost you £2100.00 alone, start adding internal work and its gonna go up & up. Start lowering compression add a turbo and your looking at prices in the region of £3500.00-£4000.00 not cheap, the you need a bespoke gearbox because the Duratec uses a different type to Fords normal FF setup, another £1000.00 or perhaps more! Forget yer turbos, the Fiesta ST was nearly a quick as the RS Focus round Lommel so with another 20-25bhp should be pretty quick and dangerous enough for road use for most people!!!!

depends on how people use them tho phyzzo, yes u r gonna get assholes who cant handle it, but then the one's that can

Yes thats true but what I was getting at is you won't be able to use much more than that! Without suspension and gearbox mods (LSD) you won't be able to put the power down. Think about it your 150bhp is quick yeh? now add another 50bhp and an increase in torque. When I had one of the original RS Turbos with its LSD that used to produce some torquesteer when we worked on it it used to try and drift across the road!!!!

oh right i get u now, u mean it will upset the car in a bad way unless u sort it out propely??? wow, for the extra power not worth it really is it???

Exactly if you want it as a road car a few tweeks and 15-20bhp should see a nice improvement without it becoming a monster. When I was racing saloon cars me RST had nearly 250bhp and was a B*%terd to keep on the track and the suspension and gearbox was well sorted.

i can imagine, my mate done something to his engine, but it was pulling the car all over place (i.e unbalanced if u get me) and he started seeing what looked like cracks/tear in the support joining things ( as u can tell i dont really know alot about this stuff lol) needless to say the car was fooked!!!1

Anyway i would not go the turbo way in a fiesta, i like the instant response of a NA engine, for me the Duratec203 kit sounds a good deal. As you said, plug and play, it's expensive, but power always is, but i agree, a lot of power in bad hands is a bad idea, i have driven clio 182s and i find them amusing, but once i was on the passenger on a b-road with the dealership guy, and i was scared to death, even though he wasn't going that fast.

Regarding turbocharging for Duratecs, as i said i reffered to mazda3 forums, and new (facelifted) focus forums, both use duratec20 and duratec23, Marcy Motorsports, is developing components to achieve power for duratec, he said the rods won't hold 10 or more psi, the rest is fine, another team is testing a 10psi kit with good results, i have videos of the car, and it's looking up nicely.

Anyways the topic was about bhp increasing, so i'm just trying to apport what i know and what i've read.

To be honest if you want a reliable 200hp for every day use it was a mistake to by a FST. With the money you spend on tuning, lowering, LSD etc you could have bought a new CTR or a good condition FRS. I don't think many owners will fit much more than an exhaust, chip and induction kit to give about 175hp and maybe drop it on Ford Eibach springs.

Yes i see your point, i would lower it a bit anyway, i would tune it though, not for extreme race applications, but i'd like a 200hp fiesta, thats just me then.