I have found that trimming the cowl just in front of the aux fans does just that -- adds low end torque. My ideas so far are to utilize the tow hook area (passenger side front bumper, or both sides of the grille.

The idea for putting the scoop at the back of the hood by the windshield is a good one, but JCE's insight is very astute. Placing an intake back there, due to the aerodynamics of the car and due to the "wing effect" of air moving rapidly over the hood and proposed intake, will probably create a low pressure (vaccum) area in that region, reducing intake.

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Don Drake

1990 300E 125k Miles
1994 S420 100k Miles