UPDATE FROM THE R&D DEPARTMENT!
Today I made a quick and dirty Hydro Booster just for a test.
No pump, only a rubber hose right in to the aircleaner hose.
I was putting it in my 95 Chrysler Voyager. At steady 70 miles per hour I usualy get 23 mpg with the booster I got 35 mpg
The only problem is that one of the zink coated bolts got eaten away in 2 hours - maybe to much battery acid.
Frank