Originally Posted by TopgunZ

I have never seen or heard of a copper cooler. They may exist and yes copper has better heat transfer rate. Its probably a cost thing. It would be insanely expensive to manufacture vs aluminum. Water is more efficient but once it heat soaks its done. On a track it will never cool back down in time to make it useful. If you hit it full throttle on the street then drove around for a couple of minutes at cruising speed it would then become closer to ambient but never fully ambient as that manifold can cook eggs on it and it becomes an oven for the aftercooler inside of it. You are then recirculating hot water all the time.

People have tried bigger hoses, bigger storage tanks, bigger pumps and bigger front mounts. Another thing is to get that storage tank out of the hot engine bay. If you really want a low pressure drop water to air you would need to pipe it so the aftercooler is mounted in the front bumper and not in the oven manifold. Like a barrel style.