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Thread: My 2.0 Zetec with ST170 head first dyno session

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    Re: My 2.0 Zetec with ST170 head first dyno session

    The ford gasket will be good enough.
    Now that you have it dissasembled mesure the St170 gasket.
    The normal Blacktop 2.0 gasket will have only two layers if you need to increase the compression.

    Any bearing will do I guess. HD, why not.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by ncoll1 View Post
    Hope this helps, the bottom line is a standard zetec, the second one up is ford racing,CNC head, the third one is a ST170 and the top one is one of my black top flowbench developed fast road heads.
    ncoll
    This is hopefully a better view of the graph

    ncoll
    Attached Thumbnails Attached Thumbnails zetec11.11.09.jpg‎  


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    Re: My 2.0 Zetec with ST170 head first dyno session

    Got any ST170 flow developed graph? Not bad in standard form.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    I believe you have a genuine 270bhp

    I sense a lot of unjustified negativity from some people, shame on you

    Have a look here: cnc heads st170, their ported st170 head makes a whopping 183 cfm @ 10" water and 12.7mm lift.

    The quote it as capable of 221bhp @7100rpm and 180lb/ft @ 5700rpm with a modified std inlet manifold!

    With throttle bodies + engine management etc they say it will make over 300bhp

    Piko built a very good engine


    By the way what internal diameter did you bore out the Busa throttle bodies to and what injectors did you use?

    Cheers
    Jason

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by RWD fords rule View Post

    Have a look here: cnc heads st170,
    Jason
    If you look at the CNC flow figures, you will see the operaters name is Jim Garrard. The air flow figures are measured on a flow bench that Jim built. His first flow bench was a copy of my Superflow and was calibrated alongside it. This new flow bench he built appears to read a little bit on the high side, if you check the standard flow of an ST170 on the graph above, you will see that it has a maximum of 140 cfm, whereas CNC on their home made flowbench think it is 150 cfm. you will see there is quite some difference. If you feed CNC 's flow figures into performance trends engine analyser part of the port flow analyser you are going to get some high BHP figures out of it. Also worth noting is that there is no worth while increase in flow until you get to 300 thou valve lift. As most camshafts for this engine only lift to about 450 thou, you have only got 150 thou of improvement. By the way Jim Garrard has left CNC and is now working in Switzerland. I understand that CNC have now purchased a superflow flowbench.

    ncoll

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by RWD fords rule View Post
    I believe you have a genuine 270bhp

    I sense a lot of unjustified negativity from some people, shame on you

    Have a look here: cnc heads st170, their ported st170 head makes a whopping 183 cfm @ 10" water and 12.7mm lift.

    The quote it as capable of 221bhp @7100rpm and 180lb/ft @ 5700rpm with a modified std inlet manifold!

    With throttle bodies + engine management etc they say it will make over 300bhp

    Piko built a very good engine


    By the way what internal diameter did you bore out the Busa throttle bodies to and what injectors did you use?

    Cheers
    Jason
    Busa bodies go from 50mm on the inlet and 42mm on the outlet to the engine. I enlarged the outlet to 44mm.
    The injectors are bosch 420cc or something.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    i take it you replaced the butterflys for larger ones ?

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by alladdin View Post
    i take it you replaced the butterflys for larger ones ?
    Nope, no need because they are 46mm.
    It was just the sharp taper after the butterfly that needed opening up.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by piko View Post
    Busa bodies go from 50mm on the inlet and 42mm on the outlet to the engine. I enlarged the outlet to 44mm.
    The injectors are bosch 420cc or something.

    Did the bosch injectors fit the Busa tb's without modification and do you know what car they are meant for or where you purchased them from?

    Thanks

    Regards
    Jason

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by RWD fords rule View Post
    Did the bosch injectors fit the Busa tb's without modification and do you know what car they are meant for or where you purchased them from?

    Thanks

    Regards
    Jason
    Bosch injectors have slightly smaller seals so I had to fit them with a short plastic pipe to seal around.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Do cam companys keep the standard fitting for pullys or do they change them so you can only fit there cams/pully compo?

    I like these but dont wana buy them if they aint gona fit?


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    Re: My 2.0 Zetec with ST170 head first dyno session

    These should fit any zetec cams. They fit to the OEM St170 cam with an adapter or if you order the catcams with VCT delete, they fit directly.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by piko View Post
    These should fit any zetec cams. They fit to the OEM St170 cam with an adapter or if you order the catcams with VCT delete, they fit directly.

    I may buy them just to spur me on

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    Re: My 2.0 Zetec with ST170 head first dyno session

    After some searching I found out that S2000 injectors can be fitted to Busa throttle bodies with a few modifications, they flow 41% more fuel, aslo if you do a search on ebay for "hayabusa injector" there is a very large variety of new injectors available with any flow rate, they fit directly into them.

    After looking at the Busa throttle bodies there seems to be very litte material left for boring out, did you go all the way to 44mm?

    Cheers
    Jason

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by RWD fords rule View Post
    After some searching I found out that S2000 injectors can be fitted to Busa throttle bodies with a few modifications, they flow 41% more fuel, aslo if you do a search on ebay for "hayabusa injector" there is a very large variety of new injectors available with any flow rate, they fit directly into them.

    After looking at the Busa throttle bodies there seems to be very litte material left for boring out, did you go all the way to 44mm?

    Cheers
    Jason
    44mm was the max they could be bored out.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Have been talking to cat cams again just cant get over how much more they are than other cams are they really that much diffrence the spec seems about the same as the pipers ???

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by trig View Post
    Have been talking to cat cams again just cant get over how much more they are than other cams are they really that much diffrence the spec seems about the same as the pipers ???
    Cat cams are made from billet cores, hence the price.
    The ones that Piper do are just regrinds.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by piko View Post
    Cat cams are made from billet cores, hence the price.
    The ones that Piper do are just regrinds.
    If it was just the cams I would have them but Ill have to buy followers and springs and have the head work done to make them fit and then buy pullys too.

    I know the head is where the power comes from but I cant justify spending over a grand on cams.

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by trig View Post
    If it was just the cams I would have them but Ill have to buy followers and springs and have the head work done to make them fit and then buy pullys too.

    I know the head is where the power comes from but I cant justify spending over a grand on cams.

    I bought the cams with normal radius and needed only four new followers to get the correct clearance on all. The rest just needed to be swaped around.
    As for the cam spec, you can just go as much as you can with factory springs. Or if you want more you'll need retainers and spring. As I told you, I will sell you my spare springs very cheap!
    For the pulleys you can use standard Zetec ones, The only drawback is they are heavier and more work involved timing the cams.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Cheers matey I think I will save up and get the cat cams as I only wana do this once. Will pm you about the parts when Im sorted

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    Re: My 2.0 Zetec with ST170 head first dyno session


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    Re: My 2.0 Zetec with ST170 head first dyno session

    i think you need to decide on a target output trig.

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by alladdin View Post
    i think you need to decide on a target output trig.
    As much as I can get for me money

    Defo want over 220 now

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    Re: My 2.0 Zetec with ST170 head first dyno session

    thing is, i think if you set your sights on a target of 225 then it should be realisticly achievable on an st170 motor for realistic costs ? head work?? if needed ? , piper cams ?? does comp need raising ??? tbh i think you need to start a thread sorry for hijack

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    Re: My 2.0 Zetec with ST170 head first dyno session


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    Re: My 2.0 Zetec with ST170 head first dyno session

    I might have started the whole SVT/ST170 cam fever, by posting my engine spec on FocusFanatisc forum, months ago.

    CatCams weren't available in the states back then.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by piko View Post
    I might have started the whole SVT/ST170 cam fever, by posting my engine spec on FocusFanatisc forum, months ago.

    CatCams weren't available in the states back then.
    I always wanted A St engine I was thinking if it could be done long before anybody had done conversion to escort as My dads mate bought a unfinnished westfield and we help fit a brand new dunnel engine I thought that would fit in my car

    But that was nearly 10years ago so I evently got round to building a zetec just as Dave at retro ford did the same.

    I now know there was a few zetec escort befor eeven dave had done his.

    After reading your posts Im hocked agian and looking to build meself the engine I always wanted maybe even better

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    Re: My 2.0 Zetec with ST170 head first dyno session

    These any good for N/A spec???

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Tought I would drag this back up now looking at importing from the us piko where did you buy your head from???

    And would I have to buy a St head or could I just buy the cnc zetec head will there be any difference if they have been cnc flowed for max flow they should be the same???

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Dug this up again for the ST questions that have popped up

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    Re: My 2.0 Zetec with ST170 head first dyno session

    double post by accident
    Last edited by Dyno; 30-12-2012 at 08:45.

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    Re: My 2.0 Zetec with ST170 head first dyno session

    As with most high power graphs, you can never say it's not possible but from what I've been measuring in the past, I know 240 Bhp is not easy. Most struggle around 220 Bhp. 250 Bhp is full race, 270 Bhp........?!? . I always watch the torque graph. It's damn difficult to go over 240 Nm and keep it up at high RPM, let alone 260 Nm.

    But as a say before, you can never say.... never.

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    Re: My 2.0 Zetec with ST170 head first dyno session

    I have an ST170 engined car in at the moment for mapping on std inlet , with one of these CNC heads. Will keep you posted on what it does. To date i have seen poor results with these heads.

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    Re: My 2.0 Zetec with ST170 head first dyno session

    poor for cnc head or the st

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Cnc

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    Re: My 2.0 Zetec with ST170 head first dyno session

    316BHP on a similar spec as mine but with custom exhaust manifold and dry sump:

    http://passionford.com/forum/restora...05-13-a-5.html
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Does your ST head have an adaptor to allow the Zetec cam to fit the inlet side or have you got a new inlet cam for the ST head.

  41. #78
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    Re: My 2.0 Zetec with ST170 head first dyno session

    Quote Originally Posted by robrs2 View Post
    Does your ST head have an adaptor to allow the Zetec cam to fit the inlet side or have you got a new inlet cam for the ST head.
    ST170 billet CatCams, highest spec with VCT delete that allows zetec cam gear fitment.
    2.0 Zetec/ST170 N/A 270HP

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    Re: My 2.0 Zetec with ST170 head first dyno session

    Thanks. I have just got a delete kit to fit the zetec pulley onto the ST cam.
    Just need it in the car to see what the power figures are before looking for new cams.

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