Alan, I guess you still have the standard downpipes and cats fitted? Normally the soot issue isn’t too bad if they are still in place, do you get black soot on the back of the car. Give Iain a call and I’m sure he will advise if it can be improved with the latest map, or alternatively splash out on Stage 4 with downpipes as a Christmas present to yourself.
How long ago was your stage 2 done? I would suggest that with recent steps forward if you took it for a retune on your current version you would see a reduction in soot and an increase in power. It seems that in the last 12 – 18 months tuning for stock turbo cars has moved on
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