Quote:
Originally Posted by cRiPpLe_rOoStEr
Would you also try an electric water pump? Or attempt something like the Ford Model T that didn't have a water pump at all?
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I will use electric water pump.
The problem with existing aftermarket automotive electric water pumps is their high current draw and low efficiency. The offerings are all pumps for cars with big engines. But after extensive research, I found a suitable pump: March 809C. This is a very well built continuous duty high temperature (120C) rated pump with magnetic impeller drive. It has a 12V version. Depending on the impeller and pump body style, it draws 1.1 - 1.6 A. With larger impeller from the 813 model, flow rate is 8 gpm at zero pressure head. Flow can be increased to 9 gpm by opening up passages and streamlining flow. Metro's stock belt-driven pump has flow rate in the same ballpark.
March 809 12 V pumps are expensive - about $250 new, but used ones in good shape can be found for $50 - $75. Spare bodies and impellers are available and reasonably priced.