Originally posted by livinsvt:
Usualy air dams are more for gas mileage, at least in most Gm cases. They can actualy give 1-2 mpg



Not trying to be an a-hole but:

Air dams are only in place to create turbulence under the car right before the radiator/ac condenser area. The turbulence screws up the smooth flow of air under the car and causes it to push a little pressure upwards, in effect forcing more air into the radiator since Air, as all things in nature takes the path of least resistance.
Therefore, more turbulence and higher pressure equals wind resistance...especially since it is forced through the cooling fins of a radiator... another restriction.
All that equals more energy required, albeit small amounts. I do not see how gas mileage could be inmproved. I could see more power resulting from it since the engine is cooler with more airflow through the radiator. Cooler equals better timing curves for the pcm and maybe a denser intake charge.

Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black