Working with fella on his TA/D. He has new enderle dual gear pump 19.5 gpm. Its on 509 ci AJPE Olds, 14-71 littlefield 54%. I figure it needs 13 gpm to motor. Figured checking with few of you guys on what you think. Asking because as he has it now my calculations he is at 12.2 to motor. While at it what pressure are you running at? Computer show his at 93. I like to be around 15e0 or above.