That was a great article!
I also did the math not too long ago (Bill probably remembers me asking him what g/s means, I knew that info would be handy
) and for a custom ram air on my truck to actually do more than fill the small amount of vacuum I would have to be travelling at least 95 mph with practically no engine load and low rpms, a feat that simply isn't possible in our trucks. Plus it would only be about 1% increase under the before mentioned conditions and at 100% efficiency from outside to the cylinder.