Originally Posted by
Mark Shead
You would expect so but take a Evo mapped rich from the factory where a Focus ST 13.5afr at full boost till 5k and then drops to mid 11afr, Who's right other than one trying to save fuel.
Mark
theres no point in burning fuel if you dont need to though mark
its not really saving fuel, its jusy not having to use it, sadly something alot of performance cars tuners over the last 40 years have never mastered