AeroDynamic tuning

Table 2. cw values for vehicle modifications

Effect of .. on aerodynamics Lowering vehicle height by 30 mm. Smooth wheel covers Wide tires Windows flush with exterior Sealing body gaps Underbody panels Concealed headlamps Outside rearview mirrors Airflow through radiator and engine compartment Brake cooling devices Interior ventilation Open windows Open sunroof Roof-mounted surfboard rack

delta cw in % approx. -5 (better car aerodynamics) -1...-3 (better car aerodynamics) +2...+4 (worse car aerodynamics) approx. -1 (better car aerodynamics) -2...-5 (better vehicle aerodynamics) -1...-7 (better vehicle aerodynamics) +3...+10 (worse vehicle aerodynamics) +2...+5 (worse aerodynamics) +4...+14 (worse vehicle aerodynamics) +2...+5 (worse car aerodynamics) approx. +1 (worse car aerodynamics) approx. +5 (worse vehicle aerodynamics) approx. +2 (worse vehicle aerodynamics) approx. +40 (worse vehicle aerodynamics)

	Effect of windshield slope on the cw value (- = better, + = worse aerodynamics)

Windshield slope 50 deg. 55 deg. 65 deg. 40 deg. 30 deg. 0 deg.

cw 0.345 0.342 0.340 0.349 0.349 0.369

delta cw in % -- - 0.8 - 1.4 + 1.1 + 1.1 + 7.0