Karlos G

iTrader: (4)

I'm going to use a complete ST170 'Duratec' engine as it has forged rods and higher quality pistons than a regular Zetec so will handle 300bhp.
The head is much better with larger valves and higher flowing cams and I will retain the VVT too!
I'll either use a FRS 1.8mm head gasket to lower the CR or a custom Cometic one if the FRS one does not lower it enough (haven't done the maths yet), my XR3i inlet that's 90% finished will now have a ST170 flange welded on the end of the runners so I can bolt it straight up, then I'm either going to re-drill the head for the RST exhaust manifold or use an adapter plate still undecided because of the risk of breaking into an oil/water way, clutch for now will be my AP Racing CP2000-35 (good for 300bhp on an RST)on a CVH flywheel coupled to an IB5 gearbox.

With my .48/60 T3 I should have a nice reliable 300bhp'ish engine thats much more responsive and economical than my CVH was.

Looking forward to getting stuck in now!

bubs_rsturbo

iTrader: (1)

good job mate!

Daveysaff

iTrader: (9)

Good stuff! I've been trawling the net for a cheap ST170 bottom end all day!
If I find one, I'm gonna have a go with the blacktop head, provided I can find out what the CR is and how strong it'll all be etc. Stick an MTX in there while I'm at it
Are you sticking with your Ka box?

Karlos G

iTrader: (4)

I am yes, dont have any money for MTX shafts and box or I would!!
I can only do this build because my CVH parts are worth good money and will just about cover it! lol

Canada1

Wow!

Why the change?
Troubles with the cvh based engine?

The ST170 head is so much better than standard zetec heads.
You will not need 20 psi to get to 300 hp.

gus

iTrader: (1)

will be good to see someone use the duratec over the zetec

good luck to you

will be good to see how you devlop this one

mattseries2

iTrader: (1)

Looking forward to seeing this.

Karlos G

iTrader: (4)

See my other thread Perry!
https://passionford.com/forum/ford-e...d-bearing.html
Thanks Fella's! Looking forward to having a god play with it!

crazycage

8-9-1 mate and it will take 300+ easy .

crazycage

its a zetec with duratec wrote on the cam cover lol

gus

iTrader: (1)

i thought they was ally

crazycage

karlos your clutch take 300hp on a zetec mate , on a cvh they dont make as much torque and they done make it as low down in the rev range as the zetec.

crazycage

a real duratec is but the st170 and focus rs are zetec based engines with duratec wrote on the cam cover just to confuse people.

clarke5700

nope blacktop zetec bottom end with different rods/pistons and a different head that all tho a standard zetec inlet bolts up to it, the ports dont line up very well at all!!

gus

iTrader: (1)

my bad

massivewangers

iTrader: (1)

Start saving for the MTX, think you'll soon mash the ib5!

crazycage

a 1.8mm head gasket will drop you to about 9-6

Daveysaff

iTrader: (9)

I'll be pestering you for some mounts and advice once I've welded the car back together then!

rhinopower

You will need to change the sump for the ib5 gearbox, none of the st's sump bolts line up. This is partly down to the st170 engine being mounted at an angle in the focus.

You need a silver top sump, pickup, and baffle tray, 4x 19mm spacers, and 4x silver top main cap bolts with the threaded part on the end, these pictures should make it easier.

crazycage

i have fitted 3 blacktops and all with the standard sump! you need to cut two small parts off that are not needed 1 so the starter will bolt at the front and one at the rear of the sump so the cv joint clears.

rhinopower

Yeah, you can still use the standard sump, and i had done for a few months, but could only use 5 bolts with an ib5

Daveysaff

iTrader: (9)

I've got 6 brand new silvertop main bolts with the threaded part on them for the windage tray you can have if you need 'em. Ford would only sell me 10 when I built my old zvh motor!

crazycage

the ib5 only has 5 bolts anyway .

heres the part you need to cut of for the front starter
you need to also trim a small part off the rear of the sump so the cv joint clears

rhinopower

Ib5 uses minimum 7, two through the sump at the bottom

crazycage

my point is he has been running it on his cvh with 5 bolts for all this time , do you really think they make any differance to the gearbox ? its going to SHIT its self no matter how manny bolts it has in it lol.
mtx is the only way to go.

rhinopower

Fair enough, didn't realise it would of only been using 5 on a cvh! I've found before that with fewer bolts they have vibrated loose, it's been good as gold since i changed it, and yes, mtx would be the best option, one that i can't afford either :'( lol

clarke5700

+1 as said the mtx was the best thing ive ever done

BRAM

iTrader: (1)

I think simon from sitech has done a few of these st170 turbo conversions and got good results out of them, i think his red escot had one in and was over 400bhp.
If you needed any advice im sure he would help.

Karlos G

iTrader: (4)

Yup, thats why I wrote it 'Duratec' in the first post, pointless renaming it IMO as it's clearly a Zetec! lol
What clutch would you recommend Gary, FRS one? I dont want a paddle though.
lol I think your right!
Yeah I need a 3mm gasket to drop it to around 8.44, going to call Cometeic tomorrow and get a price.
Thats looks far easier than messing around with different sumps and main cap bolts!

Cheers!

series_one_rst

looking forward to seeing how this goes mate. good luck.

russ rs

Can you use the Rst clutch with a zetec fly with a
Mtx

Karlos G

iTrader: (4)

Thanks!
RST Clutch doesnt fit the Zetec flywheel IIRC you use the RST Flywheel and drill the bolt holes out a bit, which is what I will have to do if I use mine.

J1mbo

iTrader: (1)

That .48 will be restrictive, mine is at 300bhp it's just glowing! I wss going to try a .63 but thought of the response I'd loose, on a 2.0l a.48cossie ex house or even a .63 would be better IMO!

Shame you've gone for zetec, I'm a cvh lover, they just take some getting right, yours would have been nice!

series_one_rst

think the rst clutch bolt on the 1.8 flywheel??

Karlos G

iTrader: (4)

Cheers Jimbo, for now my turbo will have to do as is but I can always change the housing later if needed.
I do like the old CVH and mine was a good engine making good power but I like to try different things so this ST170 idea appeals,
even more so if I go MS3 and get to play with the VVT, all new things to learn which is what keeps me interested.

No idea! lol

russ rs

Sorry yea ment efi. So not worth little extra out lay mate then. I have same clutch

J1mbo

iTrader: (1)

True, Vvt is great

Karlos G

iTrader: (4)

Driveshafts are expensive, then the box itself plus mounts, all adds up!
I see it as a new challenge, something I havent done before, as my engine needs money to get it back up to speed it seems like a good time to sell off all my good bits and make the move!

clarke5700

an rs turbo clutch bolts up to a 1.8 zetec flywheel with no problems as i ran one till it slipped at 280hp

juffer

How do you get around the problem of the water pump and how is the alternator placed? Do you use an external water pump?