Anyone setup a 90 second delay for water pump, for a hybrid setup water cooled.... |
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Anyone setup a 90 second delay for water pump, for a hybrid setup water cooled.... |
Dr. Roger |
Jul 6 2005, 02:42 AM
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#1
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
How did anyone setup the 90 second delay for water pump when the engine is turned off?
This just seems like a smart idea.... (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) |
lapuwali |
Jul 6 2005, 09:21 AM
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#2
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
Even better, control it entirely using temperature. Ideally, you'd have a variable power controller that runs the pump faster as the water temp goes up, and simply goes off completely below a set temp (say, 120dF). However, the electronics for this aren't all that simple. Such controllers are out there, though.
A simple on/off control with some set temp (say, 140dF) will also work, and is very easy to design and build (a thermistor, one op-amp, one pot, a cap, and a relay). This way, if you fire up the car to just move it out of the driveway, the water pump won't run for 90sec after shutoff each time. |
Rotary'14 |
Jul 6 2005, 09:33 AM
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#3
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Senior Member Group: Members Posts: 753 Joined: 24-April 05 From: Los Angeles Member No.: 3,977 |
A simple timing circuit will do exactly what you want. I yahoo searched "timer circuit" and the following came up,,,,
http://www.electronickits.com/kit/complete...elec/ck1614.htm Maybe this will work for you. (IMG:http://www.914world.com/bbs2/html/emoticons/mueba.gif) |
914GT |
Jul 6 2005, 10:47 AM
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#4
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Senior Member Group: Members Posts: 1,100 Joined: 11-October 04 From: Tucson Member No.: 2,923 Region Association: Southwest Region |
Not necessary, after engine shutoff convection currents will still circulate coolant until the thermostat closes. I think what would be more useful would be a small thermostatic-controlled fan on the engine lid to circulate cool air over the carburetor and intake manifold. This keeps the carburetor from getting 'heat soaked' after engine is shut off, or prolonged sitting still at idle.
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