Airdam Placement

[Asanelli]

I realize or at least I think I do that placing an airdam at the bumpers leading edge of vehicle is the best case scenario.
However in my application there is an structural member offset back from the front bumpers leading edge about 7 inches.
My intention is to use these mounts to fasten a airdam.

However what are the affects of placing the airdam behind (7inches) the front edge of bumper?

[oil pan 4]

Other production cars have had air dams like that. It's not ideal but appears to work.

[freebeard]

All air impinging below the stagnation point goes under the car. An air dam restricts the opening to the underbody plenum.

Lowering the stagnation point reduces the underbody air. Splitters offer downforce because of the presure of the downward-moving air, but they can offer a new stagnation point.

IIRC there is some advantage to a stepped air dam, a 45 degree bevel at the structural member and a fill plate to the bumper/splitter.

[jakobnev]

The main drawback is increased front lift.

[aerohead]

Originally Posted by Asanelli

I realize or at least I think I do that placing an airdam at the bumpers leading edge of vehicle is the best case scenario.
However in my application there is an structural member offset back from the front bumpers leading edge about 7 inches.
My intention is to use these mounts to fasten a airdam.

However what are the affects of placing the airdam behind (7inches) the front edge of bumper?

We've all pretty much agreed that it's best to consider what we'd to to a vehicle on a case-specific basis.
The 'shape' of your car is going to determine it's aerodynamics, so if we can know what we're working with, we can better advise you.

[j-c-c]

Originally Posted by jakobnev

The main drawback is increased front lift.

I would think less downforce might also be the result.