I'm not expert myself. But I do know that heat exchange is dependent (all other things equal) on the surface area being considered. Double the surface area, ~double the transfer. That's why rad coolers,oil coolers, tranny coolers and intercoolers all have a large number of tubes, plus internal baffeling plus additional fins to add area.
If you're cooling just a section of tube you probably haven't got enough surface area to effectively exchange the heat from a turbo at full blast.
If I had to bet I would say that the goals for good ducting of air fuel mixes and that for intercooling basically don't mix.
But don't take my word for it. Just one man
