[DaveL]

Good job on the data collection.
One minor upgrade to your testing setup would be to only switch valves and not air tubes and have a separate compressor/battery charge the system to 80 psi.

I mention this as minor as the data seems fairly consistent.

My next question is the power needed worth the speedier air fill?
This might be hard to answer for an unknown situation.
So, how about the efficiency of each unit?
Another useful measure might be amp-hrs needed to fill a tank.

The AM1.1 has a max draw of 16 amps
The Viair 90c has a max draw of 11 amps
(from the AM site)

Dave