Was pondering engine options, as i find myself doing a lot these days, and was wondering why none of the manufacturers, Outboard Jet Inc included, publish or offer volumetric flow data (CFM or L/S) vs. Hp curves for their various pumps or impeller sizes?
Say for instance if OBJ Inc had the data for their 7 3/8" V-4 impeller, and the Hp needed to obtain that CFM, then we, as customers, could then compare the RPM/Hp curve for our present motor to a different motor, and get a pretty good picture of performance characterstics as they relate to CFM of water out the jet.
You could then look at your 115 ETEC say, and see that you are putting out 100 CFM at 100 HP at 5000 RPM, as compared to a 115 Yamaha 4s moving 80 CFM at 100 HP at 5200 RPM. Just random numbers, then you could also use the RPM numbers to determine fuel consumption, as some manufacturers offer RPM/fuel burn curves.
Just a thought..