John,

I am a bit tired and about to go to bed in a moment as I have to get up early for a trip to London. What I will say at the moment though is that my car has never been on track yet and has only had a good thrashing on the road. It is also only running 14 psi on a standard oil cooled turbo.

When I get my new turbo on, the current cooling set up might not be good enough. As it is now though, the car runs too cool on a cruise and this causes condensation build up in the oil as if the head gasket has gone (creamy stuff in the oil). A good thrashing around and leaving it running for a bit gets rid of it though.