http://www.scuderigroup.com/assets/D...eet0510123.pdf
Now there is few charts which say at best 233 g/kWh. I would say interesting consept that could work. Specially that air pressure capture system was something that I had through about before saw that system.
I do agree that they need to prove their claims. Make a mule car witht their engine and let the press test drive it and test the fuel efficiency levels. You could make that kind of engine pretty easily iy you have the money what they do have.