[Walt Fricke]

The problem with the under the suspension scoops shown in the referenced article is that they are pretty vulnerable. Dip a wheel off the track where there is a lip, and you might tear one right off. The same kind of thing can happen in street driving also - and they aren't needed there anyway.

The solution seems to be an air scoop of the sort Porsche has taken to using on later cars. Maybe a 993 RS or Cup part to start with? You fashion a bracket for the A arm, and this is attached to it and sticks up, not down. It directs the air which reaches it up and into the center of the rotor. Combined with a block off piece, it gives great cooling. Guys racing with stock SC brakes often use these. To be sure they have brake duct openings in the front spoiler/valance, which sends more air into this area for these to deflect. Not sure how well they work if you have the standard front spoiler.