Electric water pump and running without a thermostat
06-11-2009, 03:11 PM
#31
Owns the Streets
Needs Camber
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Needs Camber
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I haven't noticed any heat problems from idling in traffic. Maybe the AZ and SoCal folks will pipe in on their stuck in traffic adventures.
But I have noticed with A/C on at night with headlights, the alternator has a real grumpy time keeping voltages up in traffic. Especially with the twin S4 fans kicking in to get air past the radiator.
Somebody run some tubes into and out of a pot of boiling water with aquarium pump to see what temps the water will get to in a pulsed push config. That might help locate a good location for placing the temp sender(s). (Can temp controller read multiple temp sender signals?)
But I have noticed with A/C on at night with headlights, the alternator has a real grumpy time keeping voltages up in traffic. Especially with the twin S4 fans kicking in to get air past the radiator.
Somebody run some tubes into and out of a pot of boiling water with aquarium pump to see what temps the water will get to in a pulsed push config. That might help locate a good location for placing the temp sender(s). (Can temp controller read multiple temp sender signals?)
06-11-2009, 03:52 PM
#32
Rennlist Member
Thread Starter
After doing more research, the 8020 controller is not compatible with any of the nicer water pumps out there. Most require a 12v starting voltage to get the pump moving from a static position. Also, most of the pumps use brushes, and varying voltage would significantly shorten the life of a brushed pump.
The Stewart Components pump is brushless, and appears to be a great choice. They advertise a 10,000hour life, which is significantly longer than we expect from our stock pumps. They also have a CAN-bus style motor controller available from their parent company. I am trying to get more information about available programming and pricing for the controllers. The pump cost is higher than I would like, around $400, but is rated to last 3 times longer than any of the other pumps, so significantly less expensive to operate.
The Stewart Components E558A is my new top pick, and flows 55gallons per minute. After talking to a product engineer, the pump can be interfaced (as is the case with all the other manufacturers I talked to) with a PWM based controller. For those who are not familiar with PWM, it keeps the voltage constant, but modulates the size and duration of the pulse to maintain the desired motor speed. I will update the thread with information on the EMP CM20 CAN based motor controller, as well as some other PWM style "fan" thermostatically referenced controllers that I am looking at.
The Stewart Components pump is brushless, and appears to be a great choice. They advertise a 10,000hour life, which is significantly longer than we expect from our stock pumps. They also have a CAN-bus style motor controller available from their parent company. I am trying to get more information about available programming and pricing for the controllers. The pump cost is higher than I would like, around $400, but is rated to last 3 times longer than any of the other pumps, so significantly less expensive to operate.
The Stewart Components E558A is my new top pick, and flows 55gallons per minute. After talking to a product engineer, the pump can be interfaced (as is the case with all the other manufacturers I talked to) with a PWM based controller. For those who are not familiar with PWM, it keeps the voltage constant, but modulates the size and duration of the pulse to maintain the desired motor speed. I will update the thread with information on the EMP CM20 CAN based motor controller, as well as some other PWM style "fan" thermostatically referenced controllers that I am looking at.
