The rolling anti-lag system will cause a lot of this as well. When you retard timing and allow combustion to take place after the exhaust valve opens (pop pop) there is going to be some unburnt fuel and carbon in the exhaust system.He is absolutely correct in that it runs rich, because my tail pipes were black by the time I got home from the dealer and that is only about 45 miles or so.
Ah no it's not."Flywheel" based one for comparison:
Front whp, not rear wheel.250HP sounds about right on flywheel with above rear-wheel HP figure