Originally Posted by
Chas
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:
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.