RE: Ram Air
Whatever you do, be very careful in locating the air inlet. I've heard of some cheesed-off Porsche 944 owners who have driven through deep puddles at speed (clever, huh?) and picked up a slug of water through their low-mounted factory air cleaner inlet. This event converted the Ram Air principle into the Ram Water principle and also converted their engine blocks into very unwieldy paperweights. Generally speaking, the lower an inlet is mounted, the cooler and more oxygen-rich the air charge. The higher the inlet is mounted, the less likely your tech will be discussing the concept of "hydraulic lock" with you and asking awkward questions about your personal finances.