1. To transfer heat from the air that is between compression cycles.
2. Overheating is likely to happen more quickly.
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No set of mutually inconsistent observations can exist for which some human intellect cannot conceive a coherent explanation, however complicated
The purpose of inter cooler is to reduce the air temperature, which will improve the efficiency of the compressor or other wise if we do not cool the same because of increase in temperature vollume will increase and in second satge we have to to more work to increase is the desired pressure after second satge.
I am not sure if this will help at all but there is a company that
manufacture diesel engine charge air coolers, you should try Vestas aircoil A/S
in Denmark (www.vestas-aircoil.com)