I just cant get my head round boot rads/interoolers/whatever.

How can they possibly work properly without the constant assistance of fans?

Intercoolers would make the car laggy with all that exta pipeing.

Rads & interoolers would never get the same cooling effect as ones mounted up front.

Mid engined cars have the same thing, but scoops are added to the body work so negates the problem.

So why is it done to non mid engine cars & how can they maintain efficiency?