| the ECU turned off the alternator and AC under WOT conditions. That's about the only time worrying about parasitic power loss would bother me. Typically, a well designed e-pump will outflow a stock pump at engine RPMs below ~4000 and this should promote better cooling in the RPM range that most people drive in. The e-pump is much more efficient due to tighter clearances and better impeller design that stock pumps. In my opinion, the single biggest benefit is the ability to run the pump with the engine off to prevent heat soak... say bye-bye to turbo timers. Weight? I'd estimate it's about the same as a stock pump with its fan and clutch attached. I used AutoCad to design everything and a friend did the 3D modeling in Solidworks.
|
