I am interested in putting an airdam on the bottom of my Mercury Topaz
Obviously for better MPG, but it will have the side effect of looking good
I am planning to put a 3-4 inch air dam at the bottom of the bumper lawn edging then paint it grey.
My question is should the air dam be straight up and down, or tilted back (tilting towards the tires at the bottom). or tilted forward pointing away from the tires at the bottom.
It seems tilted back towards the tires would push the air under the car, forward tilt would push the air up over. i here both trains of though the air over the top is the only way to go and that some air needs to go underneath. Well what is everyone's ideas