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Saturn
The wheel dams ahead of the tires have Cd1.10,not quite as bad as a parachute but close.They need some radius of curvature or its total separated flow and much interference drag downstream.------------- The center of the belly must be squeaky clean or diffuser is a wash.------------ Are you air-tight under the nose,between the fascia and radiator bulkhead?-------------- You already have a Kamm-back.------------- The "basjoos" stuff is the only thing that's really going to show up at the pump.The existing rear overhang of the body makes a boat-tail problematic due to length issues,whereas basjoos Civic didn't have a rear to begin with.Wagons,vans,and SUVs with existing rear overhang makes real drag reduction an extra special challenge
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