Electric water pump - Page 2 - Fuel Economy, Hypermiling, EcoModding News and Forum

oil pan 4 · 06-07-2016, 07:56 PM

I use electric coolant pump and built a multi speed controller using resistor then PWM.
I actually do not recommend electric water pumps.

Sunaj · 06-07-2016, 08:07 PM

why dont you recommend them?

oil pan 4 · 06-08-2016, 03:43 AM

Because they can be expensive. You cant get them at a local parts store. They need electrical power. They need to be wired into electrical power. Its hard to tell when they have stopped working. They may pump too little coolant. They might pump too much coolant. Unless you can get direct bolt on you have to fabricate stuff. You will have to rearrange your accessory drive, which involves fabricating brackets most of the time. Its an additional load on the limited power the electrical system can provide. The weigh more than the belt driven pump.

And maybe more reasons that I cant think of right now.

One of the reasons I do like the electric coolant pump is that I can use it to circulate coolant through my 5500 watt coolant heater.

California98Civic · 06-08-2016, 08:10 PM

I just posted a thread very similar to this and THEN found this one. Ugh. Thanks for the link to the Craig Davies pump. My question is slightly different than yours. I'd love input:
http://ecomodder.com/forum/showthrea...ate-33925.html

Sunaj · 06-08-2016, 08:12 PM

hmm, now that i've seen your thread, I am really contemplating just getting an electric motor and doing it that way. Any tuts anyone?

MobilOne · 06-09-2016, 02:19 AM

Are you attempting to reduce the load on the engine of the original water pump?

Sunaj · 06-09-2016, 02:59 AM

I would like to do away with mechanical pump for a few reasons. One which is to reduce mechanical load on engine, and to reduce weight if supplemented with a lighter, more efficient electric pump. My AC system- deleted. I want to delete Power steering as well, cant mainly because the pulley helps connect belt to water pump. Getting an electric pump would allow me to do just that. Potentially better cooling. Another reason- I love space in the engine bay. Overall, I seek a near beltless design. Engine has aged/ lost power and in the process reducing things I dont "need" until I have the funds and time to rebuild. At the end of the day bare minimum I'd like the belt only running the alternator. i believe the less crap my engine has to carry with it the more miles I can queeze out of it ( until i get the time and money to rebuild) since not many things are bogging it down, mechanically Oh, and anther reason. I love simplicity. Its my only ride to and from a job i dont mind going to every day

California98Civic · 06-09-2016, 10:22 AM

I have seen guys claim test results, even dynos, that show their electric water pump set ups save anywhere from 3-7 hp over the mechanical kind.

EDIT: here is a pump controller which varies speed of pump, controls rad fan, and monitors temp (also has alarms). The full kit with this unit is about $450!
http://daviescraig.com.au/product/ew...bo-part-no8807

Sunaj · 06-09-2016, 10:41 AM

Jeez that's expensive

Daox · 06-09-2016, 10:55 AM

Here is the setup I've concocted. It never went into the Metro due to time, and now I'm going to be selling the car. It very well may find its way into the Insight though. Cost of parts is roughly $70 if bought all new. I think you could get away cheaper if you scrounge.

http://ecomodder.com/forum/showthrea...eap-29896.html