I was wrong about the exact rate but correct that even one Facet pump moves fuel from a wing to the header tank at a rate in excess of worse case usage by my engine (15.4 gph at takeoff).  The transfer rate is conservatively 20 gallons per hour per pump - Since I run both at the same time, the rate is 40 gph (not the 100 gph I incorrectly claimed in an earlier email).