Originally Posted by REVIT93RX7
I think the pump flow rate specs and the actual flow when installed could be different. I don't think they measure the flow rate in any specific application. It's just like the HP ratings for a motor. Each application will determine the final RWHP delivered, due to driveline losses etc.
It's just like injectors, they are playing the numbers game. Get a supper supper light fluid, and flow it, then flow a supper dense fluid. Which will have a higher flow rate.
Injector companies like to rate there injectors using super light fuels (C16/Q16 race gas ect) to get a really high flow rate, when in reality on normal crap 91 octane it will flow much less.
Also you have the physical restrictions of the system. The Heat Exchanger con only flow so much. Woody proved the the bottle neck in the system can only flow 3.5 - 3.7 gpm. And we'll assume the water passages in the Heat Exchanger are that bottle neck. It's the same principle with going to a larger intake or exhaust. Yeah the engine can breath more but that choke in the intake is preventing it, so the engine is under rated. Open up that choke point and the engine can breath to it's fullest.