Zetec turbo - HEAD HELP?!
#1
Kapow!!
Thread Starter
Zetec turbo - HEAD HELP?!
Ive built the bottom end of my silvertop zetec turbo for my series 2 escort.
1mm oversized forged pistons
Steel Rods
ARP bolts
New oil and water pumps
New shells, gaskets ect
I have a stage 3 T3 turbo on the CVH manifold, Rover TomCat Turbo inlet manifold, Pace intercooler, alloy rad, omex 600 ecu.
Now that its come to the head, what do you guys recomend i do? I was going to leave it standard apart from port and polish and flow the manifold adaptor plates to suit. (alloy weld and grind out) then fit uprated valve springs.
With the parts i already have, i was hoping to achieve around 300bhp?
I also have a mk1 Focus RS gearbox already mounted on the old zetec in the car. With custom shafts. Just got to convert it to hydraulic.
Any help would be much apritiated!
Cheers, Tom.
1mm oversized forged pistons
Steel Rods
ARP bolts
New oil and water pumps
New shells, gaskets ect
I have a stage 3 T3 turbo on the CVH manifold, Rover TomCat Turbo inlet manifold, Pace intercooler, alloy rad, omex 600 ecu.
Now that its come to the head, what do you guys recomend i do? I was going to leave it standard apart from port and polish and flow the manifold adaptor plates to suit. (alloy weld and grind out) then fit uprated valve springs.
With the parts i already have, i was hoping to achieve around 300bhp?
I also have a mk1 Focus RS gearbox already mounted on the old zetec in the car. With custom shafts. Just got to convert it to hydraulic.
Any help would be much apritiated!
Cheers, Tom.
#4
PassionFord Post Troll
dont mess with the head mate as said above good for 300 plus bhp, most gains are in the valve throats, ian will sort you out some springs, can put shims under exhaust side too, just in case you go for more later on. why you running a cvh mani?" lots of cheap focus rs ones about cheap now?
#5
Bodger of Blackburn
iTrader: (2)
standard heads with uprated valve springs 106gti ones can be used for upto 300-350bhp, some talk about standard heads taking 500horses plus out there.
forget the cvh manifold, modify a nissan 200sx onto a new flange, much better for flow.
forget the cvh manifold, modify a nissan 200sx onto a new flange, much better for flow.
Last edited by xr2wishy; 03-01-2012 at 10:19 PM.
#7
I just wanted to know the limilts of them.
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#8
PassionFord Post Troll
#10
hi tom, glad to see your getting on with the build! Really want to look at that back suspension mate, could belive the rear springs were held on with electrical tape!
#11
Kapow!!
Thread Starter
Oh cool il look into the focus manifold and turbo then.. Yeah all the old suspension is going in the bin! Avo coilovers and rear antiroll bar is on the list before its on the road!
#12
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I made 545bhp on std head with 1.8 n/a cams and 106gti springs,
I am on a gt35 turbo tho, and that was at 1.4 bar
When we tried for more boost we got to 1.7 bar and 586 bhp and then that was it,
Valve float and surge,
So thats there limit what i found
I am on a gt35 turbo tho, and that was at 1.4 bar
When we tried for more boost we got to 1.7 bar and 586 bhp and then that was it,
Valve float and surge,
So thats there limit what i found
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#17
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the shims pre-load the valve spring so it has more effort to stop valve float,
it is a bodge and the reason i didnt do it..
use 1.8 cams too.. longer duration but not too much lift,
they just work perfectly, and give a massive power band increase over turbo cams
#19
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not at the min mate, when we had valve float and surge issues, i took the head off and decided on more mods...
so picked up a GGR head at good money,
sent it away and having matched ports, and a double vlave spring conversion,
while i am still waiting for that to return i decided on a turbo change, from my GT35 down to a GTX30, will still do same amount of power, just the turbo efficiency range will be greatly increased, also fitted a billet oil pump and hoping to rev it out to 8k rpm
i was booked in at bruntingthorpe for a feature with Performance Ford, but when we got the valve float i was pissed off so, cancleed it,
no point doing testing when i wasnt 100% happy,
but the time i had it on the road at running 1.4 bar and 545bhp, it was mental, suprised... well everything thats on the road lol
so picked up a GGR head at good money,
sent it away and having matched ports, and a double vlave spring conversion,
while i am still waiting for that to return i decided on a turbo change, from my GT35 down to a GTX30, will still do same amount of power, just the turbo efficiency range will be greatly increased, also fitted a billet oil pump and hoping to rev it out to 8k rpm
i was booked in at bruntingthorpe for a feature with Performance Ford, but when we got the valve float i was pissed off so, cancleed it,
no point doing testing when i wasnt 100% happy,
but the time i had it on the road at running 1.4 bar and 545bhp, it was mental, suprised... well everything thats on the road lol
#21
Kapow!!
Thread Starter
So my plan is- get some 1.8 zetec cams and 106 gti valve springs. Then il run the focus turbo and manifold to see 300bhp. Il run that this year, then next winter invest in a gt30? turbo on a tubular manifold and bigger injectors for 400bhp+...*Comments on this would be apritiated!
#22
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So my plan is- get some 1.8 zetec cams and 106 gti valve springs. Then il run the focus turbo and manifold to see 300bhp. Il run that this year, then next winter invest in a gt30? turbo on a tubular manifold and bigger injectors for 400bhp+...*Comments on this would be apritiated!
what gearbox are you using??
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in that case yes a GT30 or a GTX28 will make well over 400 bhp, infact probably touch towards 500 if coupled with a nice flowing inlet, and some siemens 83lb injectors
#26
PassionFord Post Troll
that will be a nice set up tom, i would give ian a ring about valve shims too as your in there any way, for another 20 squid its a cheap and useful mod,
#28
1.6i 16v zetec saloon
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you guys sound like you know what your talking about. I recently purchased a nice little cheap mk1 focus 1.6i 16 zetec and was wondering if any of you have tips on bodystyling for the saloon and what i could do to push a little more out the engine and what would increase the handling. I'm a complete newbie to fords I used to drive a stilo 1.9jtd which was sluggish but torquey whereas this is quite nippy and dont even know what the bhp on it would be.
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