Percentage of Total Drag of a .29 CD Volvo:
Cooling package: 33.4%
Exterior: 31.7%
Wheels: 20%*
Floor: 6.9%
Rear Axle: 3.1%
Engine: 3.1%
Front Suspension: 1.4%
Exhaust: 0.7%
*Front wheels: 13.1% Rear wheels: 6.9%
From:
Modifying Under-Car Airflow, Part 1
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