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    Results 1 to 7 of 7
    1. #1
      Join Date
      Aug 2004
      Posts
      2

      Electric Water Pump Question

      I am thinking of upgrading my water pump to a meziere electric unit (55gpm). Has anyone ever tried to run some sort of variable speed control on these? I was looking at aeromotives fuel pump controller that adjusts the voltage to the pump relative to RPM. Anyone have any opinions? My thoughts here are that I could wire a manual override, to let the pump come on after warm up (or even a basic temp switch) and then have the pump speed vary with RPM (much like a mechanical pump). I guess you could even let the pump run after shut down to facilitate cool down, but I don't know if thats necessary.

      Just wondering.

      Pete

    2. #2
      Join Date
      Nov 2003
      Location
      Paradise, Ca
      Posts
      1,411
      The only thing that I would say is that hundreds of thousands of motors didn't have anything like the setup you're describing, and they work just dandy.

      I'd spend my time and money elsewhere for sure.
      -Matt

      Welders: The only people that think a co-worker catching on fire is funny.

    3. #3
      Join Date
      Apr 2001
      Location
      San Jose, CA
      Posts
      4,210
      Country Flag: United States

      Check this place out!

      Hey,

      Don't EVER RUN YOUR ENGINE WITH YOUR ELECTRIC WATER PUMP ON! You will crack a cylinder before you ever get a sign of a problem.

      Check out this place. The sell controllers to keep the electric pump working, but at a slower speed.

      They sell fan and water pump controllers.

      http://www.dccontrol.com/index.htm

      Tony Huntimer
      RaceHome.com

    4. #4
      Join Date
      Mar 2003
      Location
      Kirkland, WA
      Posts
      884
      I'm curious how running an electric pump while the engine is runing could cause a cylinder to crack, or did you mean when the engine isn't running? I would think that having the fluid circulating through the radiator with the engine off would promote cooling.
      James
      -1969 Camaro Sport Coupe
      -1996 Z28
      -2005 Silverado
      Webpage

    5. #5
      Join Date
      Apr 2001
      Location
      San Jose, CA
      Posts
      4,210
      Country Flag: United States

      Mistake!

      Quote Originally Posted by TonyHuntimerRaceHome
      Hey,

      Don't EVER RUN YOUR ENGINE WITH YOUR ELECTRIC WATER PUMP ON!



      Thanks for catching my mistake.

      I meant to post not to run your engine with you pump OFF!

      The water always needs to be running through the engine, while the engine is running.

      Tony Huntimer
      RaceHome.com

    6. #6
      Join Date
      Mar 2003
      Location
      Kirkland, WA
      Posts
      884
      If you left the pump running after you shut the engine off, would you still crack a cylinder? I can see how sending the relatively cool water from the radiator through the block if you turned the pump on after letting it sit for a while, but as long as the coolant was circulating, it seems like there wouldn't be a thermal shock. Just wondering since I'm thinking about running an electric pump.
      James
      -1969 Camaro Sport Coupe
      -1996 Z28
      -2005 Silverado
      Webpage

    7. #7
      Join Date
      Aug 2004
      Location
      Vancouver BC
      Posts
      159
      Well if you left your pump and fans going for a few minutes after shutoff you could stop your temp from going up after shutdown. I always cringe when I shut a engine off with a mechanical guage and watch it creep up 20 degrees. I would assume the hottest water goes up into the head/gasket area and stews there at 230+ when you shutdown for a while. Having said that, on a street driven car I am not a fan of electric water pumps. Then again I dont have the $$$ to want to gain 5rwhp and trade a long living mechanical pump to an expensive electric motor.
      Cheers.







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