No confusion here, I beleive I understand the liq/air system on a busa. Seeing as we were the one of the first if not the very first to design the liq/air setup that used a recirculating system on the busa, and we have improved on it greatly since the beginning, so yes I do understand where the water and airflows, it is a copy of what we designed about 4 years ago.
I know very well were the water flows and where the charge air flows, and I am quite familiar with laminova cores and how they need to be configured to work properly.
Yours is choking the charge air, it should be fine with low boost, but as you increase the boost you will begin to start losing psi due to a pressure differential through the core configuration you are using. There is a little more to intercooling then just installing the parts where you can make them fit. The small turbo you are using, (if it is a standard GT28R) will be out of breathe at 300hp, and with the core configuration you are pushing the charge air through it is seriously choked.
Richard