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#1
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Are electric water pumps & steet use?
I'm been looking at the plethora of electric water pumps on the market. Are they good enough for street use?
You know, cruising, pleasure trips, occasional tire smoking.... |
#2
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There are a lot of variables, but Generally, electric water pumps are not well suited to street use. They are primarily made for shorter runs.
If you really have your heart set on one, then look to the most expensive ones. You will need a really good one. |
#3
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I've used a quite few of them on the street. That belt driven Moroso set up does not cut it though. The remote ones work much better.
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#4
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How much horsepower do you use in the streets? Not much, I think. In regular traffic, an electric pump can supply all the cooling needed, but if you do endurance style racing, then you can propably do better with a pulley driven pump. I have used electrics for about 10 years now, currently using a Davies Craig EWP system, thermostatically controlled variable speed remote pump, and have not experienced over heating problems so far.
http://www.daviescraig.com.au/main/display.asp?pid=47 |
#5
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Thing is they are rated for how long they will last. Couple hundred hours? Then it is time to replace it.
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#6
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not replace it, just put new brushes in it and maybe a seal. Doesnt the new Z06 Vette use an electric water pump, as well as the Cobras?
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#7
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Why yes they do as a matter of fact.
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#8
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No, neither the Z06 or cobra use an electric water pump. I think there isn't a masproduction car at the moment, that uses an electric water pump. Life expectancy shouldn't be a problem. During the last ten years I have used Meziere, Moroso and the EWP, and haven't axperienced any failures. I think I have about 10000 miles in the street, most with the EWP.
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#9
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Doea anyone know of a U.S. distributor of the Davies Craig unit?
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#10
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I looked into the D.C. remote water pump and I understand it works well, but I dont understand how the dinky remote pump does the job, a Magnum water pump pushes 55 GPM at 4000 RPM, that is alot of water, think about it a drum of water a minute. There is no way that D.C. pump can do that kind of volume,yet it still seems to work. all the other Pump manufacturers harp on their volume. The D.C unit also doesnt need a thermostat as it runs off temperature demand which is cool. Seems the old method is a little outdated, maybe a thermostatically controlled clutch on future mechanical water pumps? Shogun makes a remote pump that can be controlled by a thermostat, like a fan control, and they are available locally.
Oh yeah, D.C also sued a magazine for trying to publish performance stats on the D.C pump system, what does that tell you? Like maybe it wasnt all that good? Google it. |
#11
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FWIW...I can't speak on the Z06 but the new cobra's for sure don't use an electric water pump.
I work at a ford store these days. Even the new Ford GT(the littlr 2 dr super charged race car thingy) doesn't use an electric pump. |
#12
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Hey DartGT66
Quote:
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#13
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Yes, the basic DC pumps rating isn't a lot, compared to some US claims. But, I think they don't use the numbers in marketing purposes, so they may even be pretty honest. When removing the antifreeze in the spring, we just took the upper hose off the radiator, put a water hose in to the rad and let the electric pump "flush" the system through the upper hose. ANyway, we did that both with the DC and Meziere, and there was no doubpt of which one moves more water. The DC hands on, the difference was pretty big.
When I first got the kit, I was pretty disappointed; no way can that pump keep anything cool. So, when I installed it, I put a volt meter to the pump wires, and during the summer days, it stayed usually at around 6-9 volts. So, in my case, with a 528 wedge pump gasser putting out 780 hp and 704 ft-lb, it's more than enough in the streets. The radiator I have is some universal cheapo aluminum unit, I think it's 19" high and 26" wide, and a very effective electric fan with a shroud out of a new Volvo. I don't have a picture of the pump installed, but so far I have used the stock BB pump housing with the pump removed and the opening blocked and the circulation channel inside the housing blocked. The pump is just floating in between the lower radiator hose. I will build a "water manifold" for the next summer, and maybe even as a reverse flow system now that I'm going to add turbos. In the first place, I went with a remote pump to gain more room in between the radiator and the engine in an A-body. I have been happy with the Davies Craig, it's also less expensive here than the competitors. I ordered mine from England, and it cost about 260$ delivered. |
#14
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Quote:
Actually, thats not true. I'm a BMW tech. BMW does, since late 05' with the release of the latest 6 cylinder (n52). It actually works pertty well too. Sam |
#15
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Ah HA! I knew some Euro would use one! cool. How else would they get 500 HP out of the M5 series 6? SonicBOOM billboard add.
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#16
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[QUOTE=pishta;666043]Ah HA! I knew some Euro would use one! cool. How else would they get 500 HP out of the M5 series 6? SonicBOOM billboard add.[/QUOTE
The M5/6 motor uses a regular belt driven water pump. The reason that the N52 6 cylinder uses one is more for emissions than power. It can completely shut down the pump to warm the motor really quickly. It's pretty neat how they manipulate the motors output. Sam |
#17
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Quote:
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#18
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Yes, the DC pump works that way if you purchase the control unit too.
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#19
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correct me If I am wrong, but I think that some GM stuff uses cam driven water pumps. people don't see a belt on the outside and assume it's electric...
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#20
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What about the Meziere and CSR water pumps? Any input on these? I have personally raced with the Moroso drive(and it is perfect for that) and it WON'T work for the street,unless you plan on running it down the highway ALL the time and shutting off your engine at every stop light and keeping the water pump running.
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#21
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The newer GM V8's have a cam driven water pump, and so do many that have a belt driven cam, the water pump is driven with the cam drive. I have used Meziere, and Moroso pumps (not the motor + pulley set up) too, and they both work well enough for street driving. In my case with the DC pump, I needed more room between the engine and radiator, and therefore went with an external pump.
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