Reverse Flow/Electric Water Pump Cooling System
06-08-2009, 04:33 PM
#82
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This all comes back to the faster flow (vs stock) afforded by the electric pump...with faster coolant flow over the CHRA there will less chance of boiling the coolant in this area.
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06-09-2009, 01:30 AM
#83
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Referencing the graph Joe put up,
the max power point is around 50 li/min @ 0.3 bar of pressure.
That corresponds to a power of 25W.
Assuming motor input power is 8A @ 14V or 96W,
efficiency is 26%.
Seems low but not unbelievable.
BTW I remember the reason for the "fast coolant = overheating" myth - When a t-stat is removed, sometimes the pressure head from the pump was so much it caused the rad cap to vent, leading to overheating.
the max power point is around 50 li/min @ 0.3 bar of pressure.
That corresponds to a power of 25W.
Assuming motor input power is 8A @ 14V or 96W,
efficiency is 26%.
Seems low but not unbelievable.
BTW I remember the reason for the "fast coolant = overheating" myth - When a t-stat is removed, sometimes the pressure head from the pump was so much it caused the rad cap to vent, leading to overheating.
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06-12-2009, 12:10 PM
#84
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Interesting article on water pump testing.
Pumps vary in how much cavitation and thus at what temperature it starts:
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Pumps vary in how much cavitation and thus at what temperature it starts:
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06-12-2009, 05:20 PM
#87
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Additional manufacturers:
Dedenbear
EMP Stewart (controller included)
Moroso
Proform (no universal pumps- OEM replacement only)
Can't find flow maps on any of these. I tend to dislike Chinachargers for much the same reason.
Dedenbear
EMP Stewart (controller included)
Moroso
Proform (no universal pumps- OEM replacement only)
Can't find flow maps on any of these. I tend to dislike Chinachargers for much the same reason.
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05-08-2012, 08:52 PM
#89
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I just read thru this all, nice information overall.
Additional pump for the list:
Pierburg, various sizes but the CWA 200 (OE on some BMW's) is 125 l/min @ 450mbar/6.5psi & 200watts. Can be run ***** out simply or has built-in circuit allowing speed control by a low current PWM signal.
http://www.kspg-ag.de/pdfdoc/kspg_pr...olant_pump.pdf
Additional pump for the list:
Pierburg, various sizes but the CWA 200 (OE on some BMW's) is 125 l/min @ 450mbar/6.5psi & 200watts. Can be run ***** out simply or has built-in circuit allowing speed control by a low current PWM signal.
http://www.kspg-ag.de/pdfdoc/kspg_pr...olant_pump.pdf
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05-08-2012, 09:18 PM
#91
I wish I would have seen this before I built my system. I just went out and did it to the best of my abilities and the knowledge I had at the time. This was before I ever joined any forum.
One thing I like about his system is the fact that the water is cooled by the radiator before going into the pump. My system pulls hot water from the block, and then pushes water through the radiator and then the head. I wonder if having the hotest water in the pump will shorten the life of it.
I have had no issues so far, so after I make the changes planned, I will report about its reliability.
Also, I built my system before I knew anything about coolant reroutes. That is the reason I want to plumb water to both sides of the head. I am currently pumping water to the front.
Oh, and thanks Jason for pulling this thread from the archives.
One thing I like about his system is the fact that the water is cooled by the radiator before going into the pump. My system pulls hot water from the block, and then pushes water through the radiator and then the head. I wonder if having the hotest water in the pump will shorten the life of it.
I have had no issues so far, so after I make the changes planned, I will report about its reliability.
Also, I built my system before I knew anything about coolant reroutes. That is the reason I want to plumb water to both sides of the head. I am currently pumping water to the front.
Oh, and thanks Jason for pulling this thread from the archives.
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