Eccoti una risposte sull'argomento dalla parte di RLS:
Which is better, an air-to-water intercooler, or an air-to-air intercooler?
Apr. 29, 2010
Whether you are using an A2W or an A2A, the reality is that the heat needs to get from compressed intake air --> atmosphere.
Heat only travels from higher temperature to lower temperature.
A2A intercooler heat path: charge air --> intercooler --> atmospheric air
A2W intercooler heat path: charge air --> intercooler --> water --> radiator --> atmospheric air
There are more barriers to the heat path when you use an A2W.
If *either* an A2A or an A2W does not have sufficient atmospheric air to cool them, they will loose efficiency. While the stock A2A has limitations, a proper A2A w/ proper airflow (all of which has been solved on the Exige) will be lighter, more reliable, zero maintenance, and as efficient if not more efficient than an A2W.
A2W is great for a short burst of speed, such as a drag race, but after that it looses its advantages over A2A rather quickly. Of course I sell A2A, so I'm not unbiased