marco225

Hi All

I drive a 2008 Focus ST225

I really want to get the power up to about 600HP

I have in mind to take out the 5 POD Volvo motor and fit a YB Cosworth motor, How difficult is this


I can buy a 4x4 Saphirre cosworth with and use it as a donor car ? or is there a better way

The car will be used for day to day driving and 1/4 mile

scottyrs

iTrader: (1)

i think this will be a great idea and i dont think ive seen another one done? think it might be abit tricky though

chaffe

wont bolt up to the gearbox, so you will need to change that, the shafts, gearlinkage, clutch mech, plus im not sure its the best thing to do? you will also need to change to aftermarket management, which will have its own problems as the focus works on a can network and EVERYTHING speaks to the ecu, lights, sterio, speedo, alternator you name it, so either leave the focus management in and make it "think" its still got the original engine by fitting a cps and any other dummy equiptment, or get an ecu that will work with everything the focus needs to see. But quite honestly why would you want an old cast iron pinto block in a FWD focus? the volvo engine can be made to make huge power, there was a thread on here with a volvo making big power, ill see if i can find it.

chaffe

here it is, good read
https://passionford.com/forum/restor...ry-so-far.html

marco225

The fastest ST225 in South Africa runs a 12.8sec 1/4 mile the guy spent over R100 000 or 10 000pounds on the motor to me that is not worth it .... I'd rather go with the cossy motor
*The thing is I can buy a cosworth motor with 500hp+ relatively easily and it will be reliable with no software issue, offcourse fitting it to my ST and making it work with the ECU and gearbox will be the difficult part*
That is why I was thinking of just buying everything e.g. motor, gearbox, wiring loom and rwd suspension from a cosworth. Stripping out the focus and just fitting the Cosworth suspension motor gearbox to the focus. this will eliminate allot of problems!*If there is a ECU or management system available that can get the cosworth and ST's ECU's to work together that will save me allot of time as I will not have to replace the wiring loom*Am I making sense or talking allot of bullshit ??? please guys with experience on conversions like these give me your 2c

martysmartie

iTrader: (1)

It certainly would not be straight forward, remember the YB is a longitudinally mounted engine, where as the Duratec is a transverse engine, probably have to end up grafting a floor pan in from a suitable car which i think is what Andrew Gallacher have done I think, this is also the done procedure when people create Focos MK1's.

The Duratec seems quite a tunable engine and also has the benefit of being light, remember the FRS MK2 uses exactly the same engine and has 300HP as does the concept Volvo C30 (The one on Top Gear last night) and that has 400HP. However it doesn't necessarily mean it's cheap to tune.

That is assuming the YB will fit into the bay of an ST as it may be to small for it, so may have to cut the bulkhead etc, your gearbox will be useless as that is for a FWD setup.

For the management I should imagine you would be better running two ECU'S the Weber to run the YB, and the EEC IIRC on the ST remains as this controls other things on the car.

Martin

marco225

I know about the gearbox issue but can I still use the front suspension or do i need to use the cosworth front suspension*This is what I am going to do*remove the ST motor gearbox and rear suspension and then fit the Cosworth motor gearbox and suspension*I don't think you need to buy a cosworth RWD floorpan you can just modify the ST's floorpan but i know it will be easier to get the floorpan as it has the fixing point for the diff and suspension*Also Cosworth parts are very scares in South Africa so
I might go with a BMW M3 diff and rear suspension as it will cost less and will be easier to get hold of

marco225

Martin, looks like you are clued up on the managment side where can I buy a setup like that?


I'm want to buy a 500-600hp motor and gearbox that has everything that is needed to start it and then fit it to the st and start it

If this meen buying the complete front suspension and wireloom I'd do it

RichieST

iTrader: (2)

YB has been mounted transversely a few times before, seen them in a couple of pumas.

No it doesn't, the ST has a 2.3 engine bored out to 2.5, whereas the RS uses the 2.5, thin cylinder walls on the ST means that push it much past 320bhp and it's quite likely it will shit itself!

marco225

Forget about transvers mounted the yb motor will stay the same as the car will be made rwd