An intercooler cools the hot compressed air from the turbo by one of two methods. There are air to air intercoolers that are essentially mini radiators that cool the warm compressed air with air at ambient temps. Since the air going into your non-aspirated engine should be relatively cool anyway, there would really be no net change in temperature. The other methos uses an air-water heat exchanger where the incoming air is cooled by what is in a well-designed system a deciated water circuit with its own radiator. The water is cooled by ambient air and thus the net temp of the air will not be cooler than the ambient temps in either circumstance.

The net effect of an intercooler on a naturally aspirated engine is that it will have no effect at all on anything.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record