Shame how little this thread has moved on since I last checked.
PuntoGT's errosion pics are definately not conclusive proof -- they could well be due to the poor filtration characteristics of K&N cones, which become laughably bad after cleaning them once or twice (just stick it in front of a strong light and you'll see what I mean!)
I've now got a SupraTT which I'll fit with precompressor injection and see how far the stock turbos can go.
They are good candidates for such experimentation, as they are undersized for 400+bhp, in fact they leave their efficiency islands right after 1bar.
The shape of the intake plumbing is kinda weird, so I need to figure out where to optimally locate the nozzle(s).
Fingers crossed.
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