The best location for an electric water pump SBC V8 conversion, The best location for an electric water pump SBC V8 conversion |
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The best location for an electric water pump SBC V8 conversion, The best location for an electric water pump SBC V8 conversion |
BRAVE_HELIOS |
Apr 22 2017, 10:06 AM
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#1
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"Knowledge speaks, wisdom listens" Group: Members Posts: 295 Joined: 25-September 06 From: The Land Of ID! Member No.: 6,920 Region Association: Pacific Northwest |
Hey all,
Inching closer to going electric on my V8 conversion car. Right now; going through the process of cleaning out radiator and water passages/block with ThermoCure, then Prestone citric acid flush. Assuming I get a really clean system but not fix the run hot situation; I will go electric. Where is the best place to mount the electric pump? It would seem that the easiest way to go in my case is with this: http://www.jegs.com/i/JEGS-Performance-Pro.../50930/10002/-1 It a 50 GPM unit that should bolt right up to the Renegade remote water pump housing already in place in my car on the lower left hand side of the engine... that is assuming there is enough clearance between the water pump and the firewall. Would this work? I have heard stories going back and forth about mounting the pump by the radiator or by the engine. |
914GT |
Apr 26 2017, 01:00 PM
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#2
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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 |
The Dedenbear remote pump on my conversion has performed very well for the past 15 years so I don't feel that GPM numbers are extremely critical. Obviously you need enough coolant flow to prevent excessive coolant temperatures where it exits the engine and hot spots inside the engine. But that's also going to be dependent on the engine inlet temperature (and radiator performance). The more important factors are going to be radiator size and efficiency, and controlled air flow through the radiator. The pump is moving the heat from the engine to the radiator, the actual heat exchange is from the radiator to the air. That is where more flow is better (air flow) and not really the coolant flow rate from engine to radiator. There are a lot of arguments over this, not just in the 914 conversion world, and that's fine. But I know the setup I have works well for me.
Another thing that needs to be considered is that even though a pump can flow a maximum GPM under ideal or no-load conditions it won't necessarily be able to flow that rate in an real closed cooling system. The engine block, heads, thermostat, pipes/hoses and radiator will all restrict flow and trying to force a higher GPM through the system can result in excessive pressures or turbulence. It would be nice to know if there's an optimum GPM for a system but that's probably unique for every situation. If you had a flow meter with temperature & pressure gauges you could probably get some numbers to take some of the mystery out of this. On the V-groove balancer that is a GM part, p/n 3896590. As far as I know it's still available from GM and other sources online. |
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