New SB Max with hardened pistons, auto lubication , belt drive and the fan upgrade arrived yesterday. Porter Cable C2002 (6 gallon tank) used as first stage ,turns on at 120 and off at 150PSI , runs for 30 seconds every 15 minutes while supplying 90 to 95 PSI to SB.
Guppy - 17 Cu. Ft.(118 Cu. In) rated 4.5K
0.5 Hr. 500 PSI
1.0Hr. .2K
2.0Hr - 2.4 K
2.5 Hr. 2.8 K
3.0 Hr - 3.7 K
3:35 - 4.4 K
Top off from 3K to 4.4 K 1:05
Direct to Discovery 1Kto 2K 4.5 min to Mid yellow ,bleed and gauge reads 2.0 K.
Very pleased with results which are better than what I have read on the forums where most state 6 hrs. to take a Guppy from 0 to 4.5K.