Electric Water Pump
 

So, I have searched, and I have found many posts that discuss doing it, but I haven't found any that comment on it after completion. Many argue about whether it has enough flow once in a pressurized system. Does anyone have actual knowledge of one that will work on the FC and have enough flow for a turbocharged car that gets a lot of autocross time and runs in the hills?

I remember seeing a very old .jpg of an ad that was for an electric water pump. I cannot remember who made it, but I doubt they still do. I don't know if the benefits outweigh the costs.

There are plenty of electric water pumps available and even an adapter specifically for the 13b for the plumbing. Finding them is not a problem. The concern is that the flow rates are listed as free flow and there have been concerns about the flow once in a pressurized system. I am just looking for information from anyone who has done it or seen it completed so I know if their is enough flow once in a pressurized system.

They seem to work fine on 12As, 13Bs and 20Bs. Many people run them, but most often in a track only car. There just isn't a need for such a thing on a street car.

Obviously, electric water pumps are designed to operate in a pressurized system. If you think about it, from the pump's point of view, outlet pressure doesn't matter if inlet pressure is already higher.

Exactly! I was just about to add that when it is in a closed system, I wouldn't call it a pump any more, it is more of a circulator. It doesn't matter what the pressure in the system is, it still sees the same differential pressure!

I was just talking to my buddy tonight, VW's have these stock as a secondary water pump. I'm thinking about doing this.

Serves its own purpose on those vehicles, but yes, they do have them. They aren't large enough to use as a primary water pump though.

I've seen that pump on a VR6 I Haltech'ed. That engine would overheat at the drop of a hat, so it's no wonder they need a secondary water pump...

That's exactly what he has. Only turbo'd.

Do you think if I hooked it up with the 2nd speed on a taurus e-fan for track it would work well? Only con I can think of is draining the battery.

Here's the nicest adapter I've found.
http://www.meziere.com/images/product/large/WP91.jpg

http://www.meziere.com/ps-1300-1266-wp91.aspx#

Once you have this part you would have many choices of universal eWaterPumps to use, you just need to figure out how much flow you need. I don't have a number for you though, but I bet if you called meziere they would have an application engineer that could help you out.

You would then need to use either an inline thermostat or a digital controller - http://www.hrpworld.com/index.cfm?fo...action=product

The controller would not pose an obstruction to flow, but is costly.

I suppose...A cheaper option would be to use the stock waterpump housing and thermostat. Then remove the guts from a stock water pump and put a pipe plug where the shaft was to use as a coverplate for the gaping hole where the pump once was. Then use an inline eWaterpump. Still need to talk to someone to get the GPMs required.

Oh. I've never looked at them closely. I just assumed that they made some that would fit inside your hose. I was thinking that I could splice the upper left side rad hose, then put it inline right there.

http://www.eastcoastparts.com/assets/images/wp202.JPG
http://www.eastcoastparts.com/assets/images/wp102.JPG

http://www.eastcoastparts.com/html/water_pump.html

Just thought I'd ad this. looks like it's only for S4 wp housings, and it's kinda expensive (I've seen $400 i think?), but it's also less plumbing in the engine bay, and less possible points of failure.

It's highly doubtful. On my VR6, the secondary pump went bad, so I bypassed it with no ill effects. The main reason it is there is for extra flow through the heater core and to circulate coolant after shutdown to evenly cool the head.

just in case anyone is still interested in this i saw this water pump on the PPRE Red Bull 4rotor FD....http://www.stewartcomponents.net/Mer...Code=ElectPump

Already been said, but not a chance. The VR6 electric water pump is only there to circulate coolant through the head after shut-down (which it does for several minutes, even if the car was only started briefly in -20C!). It does not run when the engine is running, so it's not even there to supplement the flow of the primary pulley-driven pump. It's a good pump for it's purpose - I imagine it could be readily adapted to provide after-run cooling to a water-cooled turbo, for example. It's on the VR for reliability/durability. I assume it helps, my engine's approaching 275,000kms and still seems healthy.

As Mr. Cake noted, VRs (most VW's actually) are prone to running hot - VW has a long tradition of oil-cooled engines, going back to the original Beetle. The 6L sump, high oil temps, and requirement for 10/30 Mobil1 or better say the tradition was alive and well when my VR was made, at least.