I just got this from SunPerformance.com
It looks like you can fill up a 5 gallon tank in 4 minutes with a QA2
FLOW RATE - 2.18 CFM
MAXIMUM PRESSURE - 105 P.S.I.
DUTY CYCLE : 40 MINUTES @ 40 P.S.I.
TIRE RIM VOLUME TIME
31X 10.50 15 X 7 17.9 gal.
0-30 psi 3:15
15-30 psi 1:28
30-60 psi 3:40
33 X 12.50 15 X 8 23.8 gal.
0-30 psi 4:39
15-30 psi 2:18
30-60 psi 5:20
35 X 12.50 15 x 10 33.3 gal.
0-30 psi 6:00
15-30 psi 3:00
30-60 psi 7:05
TANK 5 gal.
0-30 psi 0:48
60 psi 2:02
80 psi 3:01
100 psi 4:13
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I come from a land down under.