Originally Posted by Sp3no

The oil feed is tapped from the HP oil gallery at the back of the block, i bought a second hand T220 Focus engine which already had the oil feed and return machined into the block which was quite handy. But there are a number of places you can tap into.
Managment wise im remapping the standard managment, a company in the states has cracked the ecu, you buy the software for £500 and you can plug your lap top in and away you go you dont have to make a single cut or mod to the existing loom, just need to sort out the MAF sensor with a larger 3" diameter pipe or get a plug in device to adjust the reading to see the extra flow.
If you want to go 300bhp+ you will need new pistons and rods, the standard ST170 stuff will be fine below 300. You really need to work out your CR and choose a turbo and injectors to suit the spec your aiming for, the fuel system needs upgrading too. Use a sandwhich plate between the thermostate if you want a water feed to your turbo, most turbo manifolds and turbos clash with the standard breather system so you have to block off the standard one with a core plug and add a couple of breathers to the back of the block. Clutch needs upgrading etc and as you say inlet manifold. Area 6 inlet manifold is the best but it is possible to get over 380bhp from a rover turbo inlet with adaptor plate which will cost you aroun £150.
I have just scratched the surface here, im doing the build myself and the parts alone will come to over £4000 but i should see a reliable 450bhp at the end of it, it wont be done this year its a long term project, maybe next year i will be back on the road.