Do you know how they went about controlling that pressure drop? I'm struggling to get my head around it, and can't find too much online. Was it possibly the Cosworth GBA 1.5L V6?
The pressure must drop to some extent due to the temperature drop when passing through the intercooler. (Thinking out loud)
I can't figure out the disadvantage, if there was one, to this system.
Argh, SO MANY QUESTIONS