Maximum Free Flow Rate (gph): 30
Maximum Pressure Range (psi): 5.75
Minimum Free Flow Rate (gph): 30
Minimum Pressure Range (psi): 4.5
according to the oem replacement at autozone part # 60278
they're all pretty close to this though.
if you want to upgrade your system,search out the carrier transicold pump here and grab one from Doug.
once you convert to electric,you'll never turn back,unless your a WMO burner of course (like your sc indicates lol),then id just stick with old trusty.