whilst today giving the ferret its weekly warm up/batt charge with all hatches closed apart from drivers hatch noticed for the first time the increase in air flow past my face when engine was revved at 2500 rpm very noticable ,wonder when your driving what percentage is roadspeed wind blast and what is air feeding engine? any clever types know in litres air demand of b60 at max revs am guessing at 100,s of litres per min?:cool2: