Intercooling

Air to Air
Often referred to as a front mount purely out of where their usually placed. The trick here is to receive maximum surface area for cold ambient air to flow around the fins on this, what is essentially, a basic heat exchanger. Most aftermarket intercoolers will outflow the standard side mounted versions, but buyer beware that often cheap EBAY type generic kits will perform slightly poorly against a well set up custom system.  However a good quality kit will be only slightly worse than a well engineered custom intercooler. The best way to mount an air to air cooler is in a V-mount configuration. This is made very popular on late model RX-7s where the 13B Rotary is short enough to allow for it.  So the intercooler core is set up on an angle that both funnels air into and is drawn through by the low pressure created by installing a vented bonnet.

Water to air
Try to think of this as ab air to air core that is submersed in water with a metal box around it sealing the water in. There is a water entry where cold water is pumped in and a water exit where the heat is carried away by the water. In this case, because water has a higher propensity to heat-sink than air, these intercoolers can work very efficiently. However they are more expensive than the traditional air to air version because of the need for a radiator and pumps. Space can also be an option.

Dry Ice/drag setup
The ultimate freezer for your charge air. Dry ice has a surface temperature of -78.5 degrees celcius, therefore when used take the heat out of a charge of air it works very very well. So well, infact that very large amounts of boost can be made with supremely low intake temperatures thus avoiding detonation.

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