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Thread: 2.0 Zetec Turbo Westfield Project!

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    2.0 Zetec Turbo Westfield Project!

    Hi all, nice to return to the forum! I used to have an account here but lost my login details from years ago and dont have my old email address so guessed ide start a new account... Hope your all well.

    So ive decided to build a 2.0 Blacktop turbo engine to put into a Westfield.

    I am considering using a blacktop bottom end with a st170 head as from what i have heard these mate straight up? the only thing im unclear on is that the st170 has VVT and i would need to remove this? are there any tips or hints people are willing to post on this thread regarding my idea?

    I have had a couple of small things arrive for the engine, Oil pressure gauge T peice to feed the turbo and the breather blanking plate, lapping stick with paste etc, but there is plenty in the post.

    Hoping to source a block at the end of the week.

    Cheers and all the best!

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    Re: 2.0 Zetec Turbo Westfield Project!

    Doing lots of research for the last 2 days it seems people are opting for a st170 bottom end with a blacktop head? i dont understand this as the flow and inlet ports are much bigger on the st head? who not just build a full st170 forged non vvt turbo lump? need some advice really, before when i lived in wales i almost completed a 2.0 blacktop turbo engine but had to sell it as circumstances changed. Looks like im starting to see a lot more options but need the best advice. I want to build it for 400bhp but run it at 350 with boost all the way through the range from 2.5k upwards to 6.5-7k

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    2.0 Zetec Turbo Westfield Project!

    I have no knowledge on turbo zetecs at all but my guess is that the st bottom end offers a stronger package while blacktop head offers simpler cheaper advantage. Hence the combo. After all a turbo doesn't need the best head.


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    Re: 2.0 Zetec Turbo Westfield Project!

    As alladdin says, thats why that combo is used. Its sensitive to head gasket thickness though to get the compression ratio in the right area.

    At the power levels you are talking of though you wont be able to use a stock bottom end and for the power range you want you'll probably want a good quality twinscroll turbo

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    Re: 2.0 Zetec Turbo Westfield Project!

    Can anyone else chip in on this? i would be happy running 300 but want the engine to have scope for more.

    I have seen people do blacktop head on st170 bottom end and the other way around with a st170 head on a blacktop block?

    I planned to use origional crank but forged pistons and rods?

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    Re: 2.0 Zetec Turbo Westfield Project!

    Actually considering fully forging an st170 and removing the vvt and turbocharging that now

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    Re: 2.0 Zetec Turbo Westfield Project!

    Standard crank should be fine with steel rods and forged pistons.

    Any reason you want to remove the vvt? If you have an ecu capable of controlling it, I'd say keep it.

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    Re: 2.0 Zetec Turbo Westfield Project!

    Try asking this guy he is make 522 hk on a zetec.

    https://passionford.com/forum/member...boy522bhp.html

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    Re: 2.0 Zetec Turbo Westfield Project!

    Ok years ago i did a 2ltr Zetec turbo ... its was a silvertop out of a scrapyard and had covered nearly 200k ! it make 270hp & 315ft at 3500 @ 19 psi peak. it was bench dynoed by Harvey Gibbs SCS here is the spec ... This was in a mk5 red escort on steel 16' rims it was a right sleeper ... torque steer was interesting even with the LSD would sit @120 then fire right off the speedo and rest on the trip button lol.


    Stock crank and grind ( the bearings were that good you could have used them again in a N/A configuration )
    Stock rods / ARP rod bolts
    Stock Zetec head gasket.
    Stock Zetec cams & cam wheels
    Stock Zetec head and valves
    Stock Zetec headbolts
    Piper double valve springs
    Vauxhall XE turbo pistons ( bore was very good just required a hone with the correct stones to suit the ring materiel of the xe pistons)
    Zetec 1.8 alley inlet manifold
    Escort RS turbo exhaust manifold (head re-drilled to suit bolt pattern)
    Mixture of Escort cosworth and Saab turbo ... (water cooling removed)
    4 extra injector bosses welded in each inlet tract yes it was running 8 injectors sequentially ... 4 top ones running upto 10 psi then all 8
    8 ford Puma 1.6 injectors
    Saff cosworth 3 bar map sensor
    Saff cosworth intercooler
    Pectel T2 management
    Focus MK1 RS AP Clutch
    Escort RS 2000 gearbox & Quaife lsd with a Mondeo ST crown wheel (bell housing relived for pressure plate )


    Block & head chem cleaned and min decked & skimmed , CR was around 9.1 from limited memory
    Last edited by Dan Johnston; 18-05-2018 at 08:26.

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