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Originally Posted by Tonglebeak
2) Where should the intake opening be located at? As far away and as low from the engine as possible, or does it need to be somewhere else?
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The placement is important. Not so much to get cold air, but in order to get air with a high pressure. This means that the air should be taken at a high pressure zone. This of course dependant on the shape of the car but in general we have two high pressure zones we can use. The first one is around the front bumper in the middle of the car, the intake to the radiator is placed here because of just that reason. The second place is on the hood just before the windshield, that's why air to the coupe so often is taken here.
A simple way to do it is to take the air the same place the radiator do, just place a duct over or on the sides of the radiator. Something like this is often used on racing cars but then the "whole package" tends to be redesigned. Meaning that the radiator type and placement is changed, so are the intakes and all ducting to and from these components.