my money is on an air/water setup... you wont be driving at WOT with a 1600 hp car for many seconds at a time... and the water/air setup will soak the heat anddisappate it over time so the heat exchanger doesnt have to be able to cool it all at once but just have to coap with the average... and if you use an air/air intercooler core as your water cooler the extra volume will provide the system with plenty of capacity
and the water/air IC is small enough to be packaged anywhere...æ you couls even have two in the inner fenders....
here is an inspirational pic
