Having troubles making it to the end with oil pressure. I have a BAE with funny car Williams pan and system 1 wet sump pump with 1.8 gears. #16 line to pump from pan and #12 to and from system 1 filter. I have tried running as much as 17 quarts with no luck. Pressure drops from 165 to 45 at about 4.8 seconds into run. I have tried lowering pressure screw doesn't help either. What kind of pumps are guys using for wet sumps with short funny car pans.