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SVT Performance (2002-2004) The place to chat about any 2.0L SVT DOHC Zetec engine performance, tuning and exhaust related upgrades.

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Old 12-27-2012, 01:53 PM   #41
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Quote:
Originally Posted by AJ_ST170 View Post
Thanks turbosvtfocus04 and Puke

Okay so its confirmed that the ST170 (uk) is the SVT (usa) but i would still like to know if the ZX3 is the same car, interms of engine and transmission...

I have a 63mm exhausted done and the car sound and responds very nicely.

I have also turned the original air feed pipe upside down and it fits behind the grill. Notice better response at top end.

*
I cannot launch the car even with the traction control off!!!! Need Kill switch Diagram

If i rev past 7000rpm and change it holds the clutch!!!!! Lost a few races because of this.

Help Please?

zx3 simply means "2 door hatch", you can get a zx3 with a multitude of different engines. Example:

zx3 zetec
zx3 svt/st170
zx3 duratec 2.0
zx3 duratec 2.3

zx5 stands for "4 door hatch", but comes with all of the same engines as the zx3.


The SVT/ST170 engine is very similar to the zetec engine, but there are some changes that make it to where you have to buy svt/st170 specific parts for most of the mods you do.

Regarding building power with the SVT/ST170 engine, most n/a mods are very expensive and do not build alot of power. I highly recommend looking for a supercharger or turbo setup if you really want bang for your buck. Im not sure what laws are on the other side of the atlantic, but you are better suited going for boost than with trying to build N/A.

Also, from what I understand, it is not possible to turn off the traction-control. There may be a work-around, but luckily, my SVT didn't come with traction control, so Ive never really investigated it too much.

good luck!
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Old 12-27-2012, 04:04 PM   #42
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Okay that makes a Ton of sense, So the SVT-ST170, ZX3 issue is solved.

Thanks ViperThreat

I do plan to Turbo the car but not straight away...I want to squeeze as much power out of this normal aspirated engine as possible

I am planning on stripping the engine and replacing rings and bearing (mains and big ends) so in this process I would like to work the head (gas flow, cams, lightened valves) and any other suggested modz. Then work on the intake, possibly ITBz and cold air induction....

I would like specs on cutting the original cams, modifications to the values, higher compression pistons, engineering of the crank... This is where im looking for advice

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Old 12-27-2012, 06:09 PM   #43
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lol, um to squeeze as much power out of this NA engine that you can will cost more then a Turbo and probably alot more choosing then just slapping bolt ons on. SVT Squeezed as much power out of it as possible for the most part, to squeeze any more you have to make a race car. Only a few of us have over 170+WHP but our last 30 to reach 200 will be the UK Cams for 1200USD, and 800+USD for +1mmValveP&P/bored
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Old 12-27-2012, 11:31 PM   #44
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Why in the world would a pain focus be the same as a svt or st 170 you wheretold once a zx3 is just how many doors 2 + hatch zx 5 4 + hatch a svt come in zx 3 or 5 like i have a svt zx3. Zx5 or 3 is just door related there no thing of a zx3. Either s se ses now titanium
Where is your spellcheck??? What are you trying to say?
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Old 12-28-2012, 04:20 AM   #45
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yeah Race type will be fine..

My engineers are ready to gas flow the head as soon as I deliver it.

I have a friend that is going to make me a custom set of valves with the metal and spec of my choice. (would love spec details if any one has) ???

I would like to save the cost of buying cams but cutting the original cams and putting vernier pulleys. (would love a high reving/quicker-acceleration spec details) ???

On the bottom end, I plan to just do a lil mod: knife edge the crank, with cross porting and balancing.

This car isn't well supported in SA and everyone that you take it too wants to slap you with a bill year they not 100% on there plans...so I am going to do this on my own with the advice for you guys with experience.
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Old 12-28-2012, 07:45 AM   #46
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Originally Posted by Puke View Post
Where is your spellcheck??? What are you trying to say?
Um it was from my phone, I just read what I wrote when I saw this reply. There a few word incorrect. Also it tends to jump backwards while Swyping, I apologize for that.
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Old 12-28-2012, 08:07 AM   #47
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My guy is a Fox guy<So was I NMRA True Street> Guess this is why I am stuck on the NA Foci. Well you just have to get the Short Running Manifold to support your higher RPM curve, cam's would be the hardest. In the fox world you can get custom ground for 150. But you'd want about .500 IIRC for the higher rev band I don't know what you want degree wise, depends on what else you go with. You wont get much help here honestly on how to built a NA race SVT, no one really knows. Alot of people talk about it but give up. Just getting help here with cam gears, 90% of the pop say they're useless because we have VCT but the VCT doesn't control Exhaust Cam, I need to advance or retard it correctly. But if you're looking for people that done it, Tom has broke NA 230 HP with race gas, and he think I wont be able to reach 200 but 185-190, I'm okay with that though
Quote:
Originally Posted by AJ_ST170 View Post
yeah Race type will be fine..

My engineers are ready to gas flow the head as soon as I deliver it.

I have a friend that is going to make me a custom set of valves with the metal and spec of my choice. (would love spec details if any one has) ???

I would like to save the cost of buying cams but cutting the original cams and putting vernier pulleys. (would love a high reving/quicker-acceleration spec details) ???

On the bottom end, I plan to just do a lil mod: knife edge the crank, with cross porting and balancing.

This car isn't well supported in SA and everyone that you take it too wants to slap you with a bill year they not 100% on there plans...so I am going to do this on my own with the advice for you guys with experience.
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Old 01-07-2013, 08:55 AM   #48
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Thanks Stephen

*I have spoken to the engineers, reached cam specs and this is what i have come up with:

Road Car:


duration 269 / 260
duration 235 / 226
maximum lift 11.50 / 11.00mm
lift at TDC 0.30 / 1.40mm

2000-6500RPM
application sport

Rally Cross:

duration 293 / 285
duration 259 / 251
maximum lift 13.00 / 12.50mm
lift at TDC 4.30 / 3.80mm

4500-8500RPM minimumCR12/1, race exhaust system needed.
application rally & race

*So now I am going to attempt to manufacture a fine line between, but this will purely be an experiment.

*As for the valves im getting them spiraled and ported with the technology of a C63 AMG

This should create a significant increase to just the head work...bottom end to go?
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Old 01-07-2013, 09:27 AM   #49
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So you are getting you a set of these made? Would "Road Car" Be Daily Driver? What Manifold would you be using just a custom one, how long would be your runners to upport the 8,500RPM and how would your low end power suffer? I know it wont matter because it's for rally and staying higher rpms but I'm curious.
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Old 01-12-2013, 03:43 PM   #50
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Interested in seeing if this pans out.

Why not at least design if not actually implement FI first and build everything else around it specifically? (C/R, etc)
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