Howard, check out
Bell Intercoolers
There is a Gerhard Shruf that worked with ferrari/Gilles on that project. Also I have a Diesel tech book that has a very good explanation of the Comprex Charger. Just another piece of tech that I would like to play with one day. I found a German site that had a schematic up but no translation.Drop me a pm if you want that website.
Jac Mac