I don't buy into that logic that the water circulates too fast to cool. Stock flathead water pumps flow about 60 to 65 gal's per minute. The new pumps I have flow about 110. I also run no thermostats, a puller fan and 7lb radiator cap. This is on a full race flattie 3-3/8" X 4" (286 ci). I rarely get over 190 degrees unless I run it hard, and that's on a hot day. She idles all day at 170 with the puller fan on.