Turboing the ST170 Engine
11-07-2006, 11:00 AM
#1
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Turboing the ST170 Engine
Who has tried this route?
Got any pictures to share.
It is by far the ultimate HP route if going Zetec Turbo as the heads flow loads of air
Got any pictures to share.
It is by far the ultimate HP route if going Zetec Turbo as the heads flow loads of air
11-07-2006, 11:07 AM
#6
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The focus RS engine is just like any other black top head
The ST170 is totally different
The Duratec all alloy is unproven at High HP and may fail due to the alloy block unless it is girdled / braced correctly.
The St170 flows more air than the Duratec anyway
The ST170 is totally different
The Duratec all alloy is unproven at High HP and may fail due to the alloy block unless it is girdled / braced correctly.
The St170 flows more air than the Duratec anyway
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11-07-2006, 11:32 AM
#9
Professional Waffler
i know im going too sound boring here,, but know not just use an YB engine!
i dont believe its possible to design and build a maga high performance motor straight off,,, with no real development! and i know i wouldnt like too be footing the bill for development
where as the yb has many tried and tested routes, and we all know the results can be amazing
i dont believe its possible to design and build a maga high performance motor straight off,,, with no real development! and i know i wouldnt like too be footing the bill for development
where as the yb has many tried and tested routes, and we all know the results can be amazing
11-07-2006, 11:39 AM
#12
Professional Waffler
Originally Posted by Garage19
Originally Posted by GARETH T
where as the yb has many tried and tested routes, and we all know the results
11-07-2006, 11:41 AM
#14
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Does it mater what the heads flow like as std? As you'd be modding it surely?
Is the focus RS bottom end the same bore stroke etc as st170/std black top?
Is the focus RS bottom end the same bore stroke etc as st170/std black top?
11-07-2006, 11:50 AM
#15
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Originally Posted by Rick
Does it mater what the heads flow like as std? As you'd be modding it surely?
b) Do you enjoy spending a grand when you dont need to?
11-07-2006, 12:02 PM
#16
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reality
Lol, my point is that if you are opening up ports then it doesn;t matter really if u spend an extra 10 mins grinding a bigger hole And things like squish might need to be changed, which means a total re engineer if itd being done properly. I know nothing about Zetec's, thats why im asking 
Lol, my point is that if you are opening up ports then it doesn;t matter really if u spend an extra 10 mins grinding a bigger hole
And things like squish might need to be changed, which means a total re engineer if itd being done properly. I know nothing about Zetec's, thats why im asking
11-07-2006, 12:12 PM
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Originally Posted by jhw
Originally Posted by c.h.r.i.s
has the yb ever been used in a fwd setup. or has no one done it yet? just wondering 
11-07-2006, 12:21 PM
#20
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Originally Posted by Rick
Lol, my point is that if you are opening up ports then it doesn;t matter really if u spend an extra 10 mins grinding a bigger hole
11-07-2006, 12:22 PM
#21
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Originally Posted by c.h.r.i.s
Originally Posted by jhw
Originally Posted by c.h.r.i.s
has the yb ever been used in a fwd setup. or has no one done it yet? just wondering
11-07-2006, 07:18 PM
#23
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I agree with Austin, the ST170 engine is by far the best Zetec to turbocharge! (No, its NOT Duratec....)
It has an awesome head, granted, I'd remove the VCT, but bigger ports cast as standard, big valves, double valve springs as standard.
And, its a series 3 bottom end, giving you plenty of choice of rods/pistons!
It'd be a very, very good turbocharged engine!
It has an awesome head, granted, I'd remove the VCT, but bigger ports cast as standard, big valves, double valve springs as standard.
And, its a series 3 bottom end, giving you plenty of choice of rods/pistons!
It'd be a very, very good turbocharged engine!
11-07-2006, 08:07 PM
#24
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I know someone who is doing it as well as using Audi quattro running gear to make a mk3 Fiesta 4x4 Zetec Turbo 
He's got a post on fiestaturbo.com here...
http://www.fiestaturbo.com/forums/vi...c.php?t=102873
I'm guessing he'll have some more information on his website as well
http://www.mwstewart.co.uk
Cheers,
Andy
He's got a post on fiestaturbo.com here...
http://www.fiestaturbo.com/forums/vi...c.php?t=102873
I'm guessing he'll have some more information on his website as well
http://www.mwstewart.co.uk
Cheers,
Andy
14-08-2006, 05:04 PM
#26
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Thread Starter
I reckon the heads will be good for well over 700 bhp + with the right spec.
The head was developed by the Special Vehicle Team in the USA.
The cosworth equivelant in the States
A ported Cosworth head with standard valves will flow 158 CFM
A ported ST170 head with standard valves will flow 183 CFM
You do the maths
They are by far a beter designed head,
No one seems to have cottoned onto this yet though apart from me and a few others
Already bought a ST170 head for the next upgrade
The head was developed by the Special Vehicle Team in the USA.
The cosworth equivelant in the States
A ported Cosworth head with standard valves will flow 158 CFM
A ported ST170 head with standard valves will flow 183 CFM
You do the maths
They are by far a beter designed head,
No one seems to have cottoned onto this yet though apart from me and a few others
Already bought a ST170 head for the next upgrade
14-08-2006, 05:11 PM
#27
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go for it austen i will get you that price for them valves for your head soon as... if you want the ultimate y not go 2.3
ill pm you the pics of that inlet manifold
ill pm you the pics of that inlet manifold
14-08-2006, 05:24 PM
#28
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Thread Starter
A 2.3 will mean a longer stroke crank which means all sorts of problems.
Not recommended IMO
Probably keep to 2.0 with a slight overbore to keep as much strength in the block as possible
Getting a tubular manifold and a Turbonetics / GT turbo soon but will set up a new thread about the new build
Not recommended IMO
Probably keep to 2.0 with a slight overbore to keep as much strength in the block as possible
Getting a tubular manifold and a Turbonetics / GT turbo soon but will set up a new thread about the new build
14-08-2006, 07:04 PM
#31
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Originally Posted by AustenW
I reckon the heads will be good for well over 700 bhp + with the right spec.
The head was developed by the Special Vehicle Team in the USA.
The cosworth equivelant in the States
A ported Cosworth head with standard valves will flow 158 CFM
A ported ST170 head with standard valves will flow 183 CFM
You do the maths
They are by far a beter designed head,
No one seems to have cottoned onto this yet though apart from me and a few others
Already bought a ST170 head for the next upgrade
The head was developed by the Special Vehicle Team in the USA.
The cosworth equivelant in the States
A ported Cosworth head with standard valves will flow 158 CFM
A ported ST170 head with standard valves will flow 183 CFM
You do the maths
They are by far a beter designed head,
No one seems to have cottoned onto this yet though apart from me and a few others
Already bought a ST170 head for the next upgrade
http://www.cncheads.co.uk/products.html
They were one of the first companies to look at the ST170 head.
In the end i sold my st170
14-08-2006, 08:44 PM
#32
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Thread Starter
Yes it seems Jim at CNC was the first to find out that the ST has big potential here in the UK.
Jim also ported my head some years ago now.
Very knowledgable bloke
Jim also ported my head some years ago now.
Very knowledgable bloke
14-08-2006, 09:53 PM
#33
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I can't beleive our Simon hasn't seen this post yet 
Yes he has an ST170 turbo, over 300bhp and does go very, very well indeed. It's got tons of mid-range torque, is super smooth (apart from his gear changes
) and makes a really nice noise on boost too!
I'me sure by tomorrow morning he'll see this so I'll let him explain any of the finer points as he's going to be the man to ask seeing as he's done it, and had the experience of one for the past year now.
Yes he has an ST170 turbo, over 300bhp and does go very, very well indeed. It's got tons of mid-range torque, is super smooth (apart from his gear changes
) and makes a really nice noise on boost too!I'me sure by tomorrow morning he'll see this so I'll let him explain any of the finer points as he's going to be the man to ask seeing as he's done it, and had the experience of one for the past year now.
15-08-2006, 01:29 PM
#34
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He has posted all of the photos of the development work at Ford ST Owner Club website
http://www.fordstownersclub.co.uk/fo...pic.php?t=1004
Worth looking - great photos!
http://www.fordstownersclub.co.uk/fo...pic.php?t=1004
Worth looking - great photos!
29-08-2006, 09:11 AM
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Cant belive I missed this post 
The ST engine is a really good staring block for a FI system, I'm over the moon with my conversion and friends of mine that have gone the supercharger route have had brilliant results also.
The standard ST head doesnt really need anything doing to it unless going for very high outputs (450+), have spoken to some people in the know who say the heads good for 700bhp! The basic design of the head is much better, giving better flow, the cams are far better (although easily swapped for even higher spec items) and the valves are 1mm bigger.
First and foremost get rid of the inlet manifold, even if going for a low boost conversion. Its caused me no end of trouble, get shot of it.
The standard internals seem to be good for around 300bhp, if your going for more, then uprated jobs will be the way to go.
If your going to use the ST running gear as well, then the fly wheel needs to be changed as the dual mass set up tends to die pretty quickly. My standard clutch held out for about 3 months on 300bhp before going the same way, although it had a hard life already.
If theres anything you want to know, I'll do my best to help out mate
The ST engine is a really good staring block for a FI system, I'm over the moon with my conversion and friends of mine that have gone the supercharger route have had brilliant results also.
The standard ST head doesnt really need anything doing to it unless going for very high outputs (450+), have spoken to some people in the know who say the heads good for 700bhp! The basic design of the head is much better, giving better flow, the cams are far better (although easily swapped for even higher spec items) and the valves are 1mm bigger.
First and foremost get rid of the inlet manifold, even if going for a low boost conversion. Its caused me no end of trouble, get shot of it.
The standard internals seem to be good for around 300bhp, if your going for more, then uprated jobs will be the way to go.
If your going to use the ST running gear as well, then the fly wheel needs to be changed as the dual mass set up tends to die pretty quickly. My standard clutch held out for about 3 months on 300bhp before going the same way, although it had a hard life already.
If theres anything you want to know, I'll do my best to help out mate
29-08-2006, 12:02 PM
#37
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Originally Posted by simon170
Cant belive I missed this post
The ST engine is a really good staring block for a FI system, I'm over the moon with my conversion and friends of mine that have gone the supercharger route have had brilliant results also.
The standard ST head doesnt really need anything doing to it unless going for very high outputs (450+), have spoken to some people in the know who say the heads good for 700bhp! The basic design of the head is much better, giving better flow, the cams are far better (although easily swapped for even higher spec items) and the valves are 1mm bigger.
First and foremost get rid of the inlet manifold, even if going for a low boost conversion. Its caused me no end of trouble, get shot of it.
Hi simon ive just tryed to pm you about something im trying to do just wanted to see if you could help me if you want to pm me your number i can ring you it easyer than typeing...lol
The standard internals seem to be good for around 300bhp, if your going for more, then uprated jobs will be the way to go.
If your going to use the ST running gear as well, then the fly wheel needs to be changed as the dual mass set up tends to die pretty quickly. My standard clutch held out for about 3 months on 300bhp before going the same way, although it had a hard life already.
If theres anything you want to know, I'll do my best to help out mate
The ST engine is a really good staring block for a FI system, I'm over the moon with my conversion and friends of mine that have gone the supercharger route have had brilliant results also.
The standard ST head doesnt really need anything doing to it unless going for very high outputs (450+), have spoken to some people in the know who say the heads good for 700bhp! The basic design of the head is much better, giving better flow, the cams are far better (although easily swapped for even higher spec items) and the valves are 1mm bigger.
First and foremost get rid of the inlet manifold, even if going for a low boost conversion. Its caused me no end of trouble, get shot of it.
Hi simon ive just tryed to pm you about something im trying to do just wanted to see if you could help me if you want to pm me your number i can ring you it easyer than typeing...lol
The standard internals seem to be good for around 300bhp, if your going for more, then uprated jobs will be the way to go.
If your going to use the ST running gear as well, then the fly wheel needs to be changed as the dual mass set up tends to die pretty quickly. My standard clutch held out for about 3 months on 300bhp before going the same way, although it had a hard life already.
If theres anything you want to know, I'll do my best to help out mate
29-08-2006, 12:06 PM
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st170
hi simon tryed sending you a pm about something im trying to do was just wondering if you could help if you have a number i can ring you on i would be greatful.cheers karl
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