Quote Originally Posted by parso_rex View Post
I'll bet that they don't run at Lambda 1 across all ranges now
I would bet money that this is the issue. Normally turbo cars since their inception have pumped out black smoke under full throtle to varying degrees as a result of moving from a lean cruise ratio (lambda 1) to a much richer full boost ratio.

This is because the extra fuel cools the pistons and engine in addition to accounting for the higher amount of compressed air at higher boost.

So, running lambda 1 at all ratio's seems crazy dangerous to me as you are never allowing the fuel to cool the turbo engine as almost all other turbo cars do.

You will also note that the GT and GT SPORT earlier cars do not have this failure issue and they use more fuel than the 118TSI.