Front Ducting... good or bad

[hybrid_john]

So here is the deal...I want to run a front bumper/spoiler for my car (see:"My surgery ideas" thread in the fiber forums). In the center of the bumper I want to use an oil-cooler, and am worried about drag created by the dead space behind the cooler. I have came up with an idea, by placing ducts in the shape of the bumper opening and running it though to the hood. I have been told this may create lift in the front and I am worried about this.

I would like some input/opinions on wether or not this would create lift, downforce, or wehter it would just be a big void in the front....any one have experience with this kinda stuff? HELP!




John