Don't forget that if you use this method to get the throttlebody entry temps down, and map it into your ecu, and then you have a problem with it, surely it's just another physical thing to go wrong.

In my opinion the best way is to just rely on a super efficient intercooler - this only goes wrong if you wrap your car around a tree!

Surely the hassle of plumbing in a pre-turbo air cooler wouldnt justify the benefits gained from running it??