Electric water pump - Fuelly Forums

Click here to see important news regarding the aCar App

Reply
 
Thread Tools Display Modes
 
Old 01-26-2007, 06:11 PM   #1
Registered Member
 
bzipitidoo's Avatar
 
Join Date: Jan 2007
Posts: 112
Country: United States
Electric water pump

Seeing some of the posts about putting in a hotter thermostat, why not just go to an electric water pump? http://www.racerpartswholesale.com/elecpump.htm They boast it can deliver an additional 20 HP. Wouldn't need a thermostat.

This was one of the things a move to a 42V standard for automotive electrical systems was supposed to give the world: electric everything.
__________________

bzipitidoo is offline   Reply With Quote
Old 01-26-2007, 06:55 PM   #2
Registered Member
 
skewbe's Avatar
 
Join Date: Jan 2007
Posts: 771
Country: United States
FYI, 20hp is certainly not anywhere what a typical commuter car on a typical commute would gain. Their biggest pump only draws 150 watts which is about 1/5 HP.

Actually an engine driven water (and oil) pump makes a lot of sense. It's a low loss transmission of energy to the pump and they only need to be turning when the engine is working anyway. More oils and water is also usually needed at higher rpms too.

Power steering pumps and AC pumps on the other hand do not have this serindiptuous relationship with RPM. Of course eliminating these entirely is a step towards better gas savings, but some efficiencies can be had by not turning them in direct proportion to the engine rpm. One of the ways to do that is with an electric motor.

It is much more "lossy" to turn the alternator to turn a motor to turn the pump than it is to just turn the pump, so with power steering it is more efficient to eliminate the hydraulic system and have an electric assist.

AC, I dunno, peltier junctions v/s motor driven compressor I recon, I think I read about a wobble plate arrangement around here recently also.
__________________

__________________
Standard Disclaimer
skewbe is offline   Reply With Quote
Old 01-26-2007, 07:14 PM   #3
Registered Member
 
GasSavers_Ryland's Avatar
 
Join Date: Mar 2006
Posts: 1,325
Country: United States
Send a message via AIM to GasSavers_Ryland
If you get the kit that has the variable speed pump/controler, then I could see how it would be rather affective, I wouldn't want to compleatly turn off the water pump, because of how the temp sensers are not alwas located in an area that has coolent naturaly flowing past them.
the biggest advantage of course with an electric water pump is going to be with engines that run at higher speeds, like in racing conditions.
GasSavers_Ryland is offline   Reply With Quote
Old 01-28-2007, 07:36 PM   #4
Registered Member
 
Compaq888's Avatar
 
Join Date: Oct 2005
Posts: 1,460
Country: United States
Imagine electric power steering, electric water pump and electric valves. My 106hp motor will probably make 130hp.
__________________

Compaq888 is offline   Reply With Quote
Old 01-28-2007, 08:08 PM   #5
Registered Member
 
GasSavers_Red's Avatar
 
Join Date: Nov 2006
Posts: 513
Country: United States
Send a message via MSN to GasSavers_Red
Going for electric power steering shouldn't be hard for most of you guys due to weight. Use a power steering pump off of a MK2 MR2. If it can steer an XJ around, should work fine with Civics and Geos

http://www.driveev.com/jeepev/convpgs/psteer.php
__________________
GasSavers_Red is offline   Reply With Quote
Old 01-28-2007, 08:19 PM   #6
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
Quote:
Originally Posted by Compaq888 View Post
Imagine electric power steering, electric water pump and electric valves. My 106hp motor will probably make 130hp.
I doubt it would, but then again, I wonder how electric valves would work.
SVOboy is offline   Reply With Quote
Old 01-29-2007, 06:55 AM   #7
Registered Member
 
GasSavers_TomO's Avatar
 
Join Date: Oct 2006
Posts: 1,108
Country: United States
Send a message via AIM to GasSavers_TomO Send a message via MSN to GasSavers_TomO Send a message via Yahoo to GasSavers_TomO
The thing I'm wondering is: with all the added electronics to the car, wouldn't you need a higher amp Alternator (depending upon model of car) and therefore wouldn't that produce more load on the motor? I guess one would have to sit and crunch some numbers given the nominal amp draw on said devices.
__________________

Honda Civic VX Info/Links
Remember to use good Webiquette!
Quote:
Originally Posted by ezeedee View Post
controversy is an idea thought up by weak people who are too afraid to hear the truth.
GasSavers_TomO is offline   Reply With Quote
Old 01-29-2007, 07:02 AM   #8
Driving on E
 
Matt Timion's Avatar
 
Join Date: Sep 2005
Posts: 3,110
Country: United States
Quote:
Originally Posted by Red View Post
Going for electric power steering shouldn't be hard for most of you guys due to weight. Use a power steering pump off of a MK2 MR2. If it can steer an XJ around, should work fine with Civics and Geos

http://www.driveev.com/jeepev/convpgs/psteer.php
Wow... I wish I had known about this pump when I was still working on the FrakenCivic. It definately would have been a fun project (and would have saved me the hassle of making sure the crank pulley was the correct one for the power steering pump).
Matt Timion is offline   Reply With Quote
Old 01-29-2007, 07:16 AM   #9
Member
 
Join Date: Jun 2012
Posts: 42
Country: United States
What about the efficiency of the alternator and electric motor? With a current water pump you motor is turning a pump. With an electirc you are turnning the alternator with maybe 90% efficiency then running an electric motor with maybe 90% efficiency.
The only way I see it being a gain is if you could run the pump at a lower output (this pump claims this) or turn it off when not needed.
ron22 is offline   Reply With Quote
Old 01-29-2007, 07:28 AM   #10
Registered Member
 
Join Date: Oct 2005
Posts: 682
Country: United States
IMHO, any water pump is a terrible idea that wastes gas. Hot water rises. If you mount a radiator ABOVE the engine, it would create a thermosiphon that would move coolant due to density difference.

I never have quite figured out why almost all car manufacturers mount radiators in front of the engine where it creates drag and needs a water pump.
__________________

__________________
Capitalism: The cream rises. Socialism: The scum rises.
Sludgy is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cost of motoring UK & US Draigflag General Fuel Topics 13 12-12-2013 04:22 AM
Fuelly Android App - eehokie Fuelly Web Support and Community News 2 07-14-2010 08:59 PM
More detail josh434 General Fuel Topics 2 06-28-2009 02:39 AM
Combined totals of all my vehicles? nizationpcs Fuelly Web Support and Community News 0 03-30-2009 06:41 AM
Vehicle Notes pb Fuelly Web Support and Community News 4 10-08-2008 11:38 AM

» Fuelly iOS Apps
Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 03:39 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.