Thanks for all the info so far guys. Here's a few more questions though:
I have bought the larger turbo (T34) from the early evo integrale which should give me up to 1.5 bar peak boost, holding say 1.3 bar. What other engine mods would be recommended to both improve performance and ensure some amount of longevity?
I was planning tubular exhaust manifold, custom exhaust, thicker head gasket, freeflow airfilter and custom written chip. Have I missed anything?
Will the standard intercooler be sufficient or would it be wise to install water injection activated by a pressure switch? Also How can I check that the intercooler water jets are working?
I guess the clutch will need uprating too as I reckon near 300bhp should be realised with these mods, which is the one to go for?
Suspension: the front needs attention as it clatters a bit over bumps, I just ordered new wishbones, anti-roll bar bushes and Eibach springs to fit during the rebuild. Does anyone know how much new standard shockers are and would it be better to ditch them and get bilsteins or konis? My car car has done 74k miles and still has the original ones so I guess they could be a bit worn out.
I know there are a bunch of questions here but bare with me, I've just got the Q4 and I'm sucking up all the info I can.