View Full Version : Air to Air Vs Water to Air Intercoolers

11-24-2013, 11:26 PM
A Pro and Con Comparison showing which could be better for your boosted project.

One of the biggest arguments when it comes to intercoolers is which type of intercooler is better? In this article we will discuss what each type of intercooler is and the pro’s and cons of each.

Air to Air Intercooler


An air to air intercooler is an intercooler that uses air to cool air. Meaning the exchange of heat that occurs is between the air that you have charged in your charge pipes and the air that is flowing through the intercooler. Air to Air intercoolers are only as efficient as the ambient airflow (air temperature outside) that they see. Placement of these types of intercoolers is therefore very important in the efficiency of this type of intercooler.


1. Requires no power to work and therefore is easy to set up.

2. Requires no liquids to work and therefore no chances for leaks .

3. Doesn’t suffer from heat-soak as long as the intercooler is seeing good airflow.


1. Efficiency is only as good as the ambient air temperature.

2. Efficiency is only as good as the amount of airflow the intercooler see’s.

3. Cannot be mounted anywhere, since it must be mounted in a location to see airflow.

Water to Air Intercooler


A Water to Air Intercooler is one where the exchange of heat occurs between water and air. Water is pumped through the intercooler so that the heat from your charge pipes is transferred to the water. This type of set-up can be mounted anywhere, and just needs to have water plumbed to it. Because of its requirement for the flow of water, this type of intercooler requires a water pump, a reservoir, and a heat exchanger for the water mounted somewhere that will receive good airflow.



1. Really good efficiency, so the size of the intercooler can be smaller.

2. Efficiency can be exaggerated by using ice, or other chemicals to produce normally un-realistic temperatures for short amounts of time.

3. Can be mounted anywhere along the charge piping route.


1. Requires a lot of other accessories to work.

2. Because it is more complex, it naturally causes more opportunity for problems, like leaks.

3. Can become heat soaked when used for long periods of hard driving and become terribly in-efficient.


If you have the room, and can mount an air to air exchanger, it is the best option, unless you are drag racing, or only looking for short stints of power. While many have been able to make air to water exchangers work on the race-track in a way that won’t cause them to heat-soak, they have only been able to by adding TONS of water cooling and capacity, and therefore a lot of weight. In the end its all in the install and the ultimate goals and uses of the car.

Happy Boosting!! :beer: