Quote:
Originally Posted by gumby79
If the stock airdam is extend lower than the body and suspensionn then adding size may only add frontal area aka pushing more air.
my theorem
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At least 4-investigators measured drag increases when the depth of the air dam was increased beyond some optimum depth.
For racing,1-investigator found that a 'VERY' low air dam would give a 1% drag reduction,although it would be useless for the street.
An 'active' air dam could address this issue.Volvo's done it.Ford has done it.