Originally Posted by
Fezzrs
Why do these cossie managed rs turbos love idling in the high 12s something I never understood they idle so good in high 12s
Not sure what the question is ?
Most engines will idle stronger when richer than stioch. Although deliberately doing it down into the 12's is just stupid and pointless.
IMO it points to either bad tuning or other problems they're trying to work around.