I don’t believe in the this bench flows low or this bench flows high excuse. I stupidly had a flowbench (orfice 6 motors) that took readings at 10 inches of depression and converted them to 28 inches and had a flow tube to calibrate it. Well I was getting into porting for customers and didn’t trust the conversion so I kept it but bought a Quick Flow 400 flowbench (pilot style bench with fluid manometers). That bench had a single big azz blower driven by a 5 horsepower motor. I hated that bench as the fluid manometers changed ever hour. To convert flow numbers you had to take a reading at every .100 (example.06, 1.30, 1.84, 2.3) and convert it to a flow number. Then you were supposed to favor the readings based on temp, humidity, etc, when the test was taken. Loud, non user friendly, and inaccurate. So I took the best of my first bench and upgraded it to 36 inches of depression capabilities (8 motors) and easily checked for calibration with an orfice plate. The bench varies maybe and I said maybe 3 cfm all year. At the very least give the customer before and after numbers.
