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Old 11-14-2009, 08:49 PM   #31 (permalink)
...beats walking...
 
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...worst case E-waterpump scenario: (a) pulling a trailer; (b) up a steep incline; (c) with A/C-running; (d) on a hot summer day.

...best case E-waterpump scenario: (a) lightly cruising; (b) flat road; (c) no passenger climatic loads; (e) on a cold winter day.

...somewhere between those two extremes has gotta be some hidden FE numbers!

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Old 11-15-2009, 12:19 AM   #32 (permalink)
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Worst case scenario, electric water pump moving water through the system with 10% the load of the stock mechanical pump. Everything happy.

Best case Cruise on the interstate on a blue sky 50% day, electric pump pulling like 2% of the original systems load, still have a happy ending to the story...

I'm going to try and find the specs on the pump I've been working with.
Its a SMALL unit and keeps up with a engine running way beyond design limits.
Gotta be some good data somewhere.

Its worth about 2 effective HP on the race car, if it could maintain that
in a highway situation it would not take long to pay for itself. Plus the
benefit of being able to cross connect it and a block heater for pre-heat use.
As I recall it was about 180 bucks for the unit and the controller was 75

Dave
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If it has a motor its worth playing with.......
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Old 11-25-2009, 12:49 AM   #33 (permalink)
Grrr :-)
 
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I am thinking something like a Variac where you simply "adjust" the speed of the pump yourself. IE "YOU" be the computer so to speak.

electric rotational conversion is NOT EQUAL. yes the alternator is very inefficient but if your going epump your also going sans alternator so irrelevant.

also the conversions are NOT EQUAL electric motors are VERY VERY efficient approaching 90% some over 90% electric GENERATORS (ie alternators) are very inefficient.

I am thinking something like a dimmer switch where I "learn" what settings are good for my commute based on outside temps and I "mark" the knob with the temps. get in the car its 60' out turn the knob to the 60' mark and "tune" if needed.

I would add an audible alarm to the temp gauge so if it started to rise (or fall) too much I would get an alert kind of like the sensor telling the actuator to adjust ie the sensor (buzzer) would tell the actuator (driver) to adjust the knob :-)

Can I retrofit an electric motor directly to the existing water pump or would that lose a lot of efficiency?
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Old 11-25-2009, 04:40 AM   #34 (permalink)
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Wink where to purchase

where can i find an electric water pump for the 99 metro? (if they even make one)
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Old 11-29-2009, 02:16 PM   #35 (permalink)
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Something like this maybe

Mr. Gasket 4333 - Mr. Gasket Electric Water Pump Drive Kits
Mr. Gasket 4333 - Mr. Gasket Electric Water Pump Drive Kits - Overview - SummitRacing.com
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Old 12-05-2009, 11:59 AM   #36 (permalink)
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Just get a 12 volt dc (probably 1000 watt) electric motor of ebay and put it either 1) in place of the pulley ie in front of the pump or 2) with a pulley and a belt connecting the motor to the water pump (so you dont have to mess with "modding" the water pump at all).
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Old 12-05-2009, 12:46 PM   #37 (permalink)
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I was not sure if that would be efficient or not. I may try it though because I can use an AC bracket to mount the motor too and this way LEAVE the water pump and alternator in place as is. So if something happens I can pop the regular belt on and be on my way stock.
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Old 12-05-2009, 03:36 PM   #38 (permalink)
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Exactly... sure its not the MOST efficient way but if you rather pay $150 for an electric water pump, find a way to mount it, route all the lines, and remove the oem water pump then you can do that also
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Old 12-05-2009, 05:38 PM   #39 (permalink)
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I was thinking LEAVE the oem pump in place and I figured a replacement pump would have an IN and an OUT which I could simple insert into a cut in half radiator hose. Done. No mounting hassles no running lines no removing the oem pump (that is an issue will water flow ok if the oem pump is left in place and not spinning? I have no idea on that one.

Remember I want to go alternator free as well so power consumption is pretty critical. a 1000watt motor "seems" to my gut check to be seriously over kill.
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Old 12-07-2009, 03:07 AM   #40 (permalink)
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Here is a company that makes electric water pumps for cars, including a controller.
Kind of expensive but nice little video explaining the benefits and savings.

You can get with or with out the controller.

They are targeting 3L V6 type car. They claim a benefit.

I am interested but hoping someone else will give it a go.

Davies Craig

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