stg3 t3, gt28, t34 etc. turbo spec help
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stg3 t3, gt28, t34 etc. turbo spec help
Hi guys. I need help with which turbo spec to run on my new engine if anyone can help?
Not after a lag monster if possible.
Car is a s2 turbo
Engine spec is
Full p8 cosworth management, coilpack etc
Siemens injectors
Cvh
Worked head
Kent 35 cam kit
Double valve springs
Kent pulley
Block slightly overbored
5 layer steel head gasket
Wossner 8:1 forged pistons
Pec steel rods
New genuine Ford oil pump
New water pump
Unground crank
New sump
Arp bolts
Arp stud and nut kit
Cheers
Not after a lag monster if possible.
Car is a s2 turbo
Engine spec is
Full p8 cosworth management, coilpack etc
Siemens injectors
Cvh
Worked head
Kent 35 cam kit
Double valve springs
Kent pulley
Block slightly overbored
5 layer steel head gasket
Wossner 8:1 forged pistons
Pec steel rods
New genuine Ford oil pump
New water pump
Unground crank
New sump
Arp bolts
Arp stud and nut kit
Cheers
Last edited by griffo69; Mar 28, 2016 at 05:40 PM.
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Joined: Sep 2005
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From: Warwick
What kind of power are you hoping for and what kind of characteristics?
I am tempted to suggest a Stage 3 T3 but the lag will go up.
I am running a Stage 2(ish) on mine (a 1.8 ZVH running MFI, Kent cam, Stage 3 head, ARP bolts at 18PSI with it making 225BHP. I reckon there is more to come if I can get it onto EFI and dabble with the cam timing. I also reckon it runs out of puff higher up in the rev range, partially down to it being a ZVH. I do sometimes wonder about putting on a Stage 3 (basically it has a larger exhaust housing and turbine), but this car is currently a little laggy to what I am used to with turbo cars (a chipped and mildly tuned 944 Turbo and a stock Mondeo 2.5T) but not horrific. That and the torque curve is very flat:
I am tempted to suggest a Stage 3 T3 but the lag will go up.
I am running a Stage 2(ish) on mine (a 1.8 ZVH running MFI, Kent cam, Stage 3 head, ARP bolts at 18PSI with it making 225BHP. I reckon there is more to come if I can get it onto EFI and dabble with the cam timing. I also reckon it runs out of puff higher up in the rev range, partially down to it being a ZVH. I do sometimes wonder about putting on a Stage 3 (basically it has a larger exhaust housing and turbine), but this car is currently a little laggy to what I am used to with turbo cars (a chipped and mildly tuned 944 Turbo and a stock Mondeo 2.5T) but not horrific. That and the torque curve is very flat:
Always a pleasure!
Joined: Jun 2015
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From: Sudbury, Suffolk
Target BHP and budget are what we need to know to advise you mate, but as Stu has suggested one of the GTX or GT range will spool nicely compared to an old T series and flow for good power too.
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Cheers for the info lads
Target power would be hopefully around 300 or in the very late 200s . I'm ideally after one that isn't a lag monster, something nice and responsive . Would you know if these turbos fit the original cvh lay out , I mean pipework etc
Cheers
Cheers
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What kind of power are you hoping for and what kind of characteristics?
I am tempted to suggest a Stage 3 T3 but the lag will go up.
I am running a Stage 2(ish) on mine (a 1.8 ZVH running MFI, Kent cam, Stage 3 head, ARP bolts at 18PSI with it making 225BHP. I reckon there is more to come if I can get it onto EFI and dabble with the cam timing. I also reckon it runs out of puff higher up in the rev range, partially down to it being a ZVH. I do sometimes wonder about putting on a Stage 3 (basically it has a larger exhaust housing and turbine), but this car is currently a little laggy to what I am used to with turbo cars (a chipped and mildly tuned 944 Turbo and a stock Mondeo 2.5T) but not horrific. That and the torque curve is very flat:
I am tempted to suggest a Stage 3 T3 but the lag will go up.
I am running a Stage 2(ish) on mine (a 1.8 ZVH running MFI, Kent cam, Stage 3 head, ARP bolts at 18PSI with it making 225BHP. I reckon there is more to come if I can get it onto EFI and dabble with the cam timing. I also reckon it runs out of puff higher up in the rev range, partially down to it being a ZVH. I do sometimes wonder about putting on a Stage 3 (basically it has a larger exhaust housing and turbine), but this car is currently a little laggy to what I am used to with turbo cars (a chipped and mildly tuned 944 Turbo and a stock Mondeo 2.5T) but not horrific. That and the torque curve is very flat:
That is a very flat torque curve for a cvh/zvh! Normally they drop off past 5000 rpm quite badly unless you have a cam/good headwork/more boost.
You are quite rich past 5K though. You would possibly pick up a little power if you were not so rich.
To the OP, what power do you want? Stage 2/3 T3 is relatively cheap and very easy to install. If budget is less of a concern then I would be looking at the GT or GTX range as mentioned.
Last edited by Rob_DOHC; Feb 16, 2016 at 12:33 PM.
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From: Palmers Greek, London
I think if you're going for a new turbo going for a roller bearing unit is logical especially if you want to cut down on lag. Something like a GT2560R would be good or perhaps a GTX3067R as they're a T3 flange.
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Joined: Sep 2005
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From: Warwick
That is a very flat torque curve for a cvh/zvh! Normally they drop off past 5000 rpm quite badly unless you have a cam/good headwork/more boost.
You are quite rich past 5K though. You would possibly pick up a little power if you were not so rich.
To the OP, what power do you want? Stage 2/3 T3 is relatively cheap and very easy to install. If budget is less of a concern then I would be looking at the GT or GTX range as mentioned.
You are quite rich past 5K though. You would possibly pick up a little power if you were not so rich.
To the OP, what power do you want? Stage 2/3 T3 is relatively cheap and very easy to install. If budget is less of a concern then I would be looking at the GT or GTX range as mentioned.
The richness I am aware of, although it does begin to lean off after 6kRPM;a certain Derby based outfit reckon the injection system is dealing with more than it can handle, even with the 5th injector. It's one reason why I am considering going to a modern EFI setup, maybe one of yours
.It's good to see the GTX ranges being mentioned, it will be something to potentially look into in the future
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That is a very flat torque curve for a cvh/zvh! Normally they drop off past 5000 rpm quite badly unless you have a cam/good headwork/more boost.
You are quite rich past 5K though. You would possibly pick up a little power if you were not so rich.
To the OP, what power do you want? Stage 2/3 T3 is relatively cheap and very easy to install. If budget is less of a concern then I would be looking at the GT or GTX range as mentioned.
You are quite rich past 5K though. You would possibly pick up a little power if you were not so rich.
To the OP, what power do you want? Stage 2/3 T3 is relatively cheap and very easy to install. If budget is less of a concern then I would be looking at the GT or GTX range as mentioned.
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Joined: Jan 2013
Posts: 442
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From: North Yorkshire
In run a stage 3. I got Dan at turbo rebuild blackpool to do me a custom built turbo Griffo and to be fair am very happy and no lag to bother me to be honest. Not just about the power the engine has now but also a stage 3 will cover a future when it comes to wanting more power if you do as you say dude 😆
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