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Originally Posted by cody
Doesn't that make better use of the turbo's efficiency range?
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No. The efficiency map is a table that shows at what flow/pressure ratios the turbo will heat the air the least. But putting that less-hot air through a hot IC defeats that. And pressure drop across the IC has no effect on power anyway- the pressure drop comes from cooling the charge. No pressure drop, no temperature drop. One may argue that the tube and fin style of Ic is more restrictive, but the added cooling benefits outweigh it, both in my opinion and that of almost all manufacturers.