well the eficiency of the intercooler is determined by the area and mass and speed of the air passing over the surface (both being a sum of many factors) but lets for the sake of argument asume that you were first to try and run a large single intercooler partially hidden by a valance.. and were then to saw it in perfect halves (with an infinitely thin saw) and re mounted the two halves in better airflow... then youd be better off efficiency wise.. also the total area of the intercooler piping should be greater when running two instead of one.. also you should have shorter combined length of the pipes...
but in all honesty, on a twin turbo setup, you have the capacity to over power any chassy.. regardles óf intercoolæer configuration, so the answer in the real world is propably that you wont know the difference driving the car... and besides if you like two intercoolers... run two! its your car, you can do whateher you like (cool huh?)
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Elwood:We're 105 miles from Chicago, we have a full tank of gas, half pack of cigarettes, it's dark out and we're wearing sunglasses.
Jake: Hit it.
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