Anyone using an electric water pump only on v8 cerbera?

[john wyatt]

I am about to conclude the purchase of a low mileage 4.5 cerbera red rose upgrade, it has been off the road since 2006 following a head gasket failure, engine has had a complete and well supported rebuild which I am reasonably comfortable with, however amongst other mods the owner has opted to remove the Impeller from the mechanical water pump and install a davies Craig computer controlled item, from the little I have read returning it to standard is an engine out which I would prefer to avoid at this stage unless absolutely necessary, have read many reports of the davies Craig units failing, does anyone have experience in their own car of an adequate and reliable EWP?

[fatjon]

The mechanical water pump consumes about 4-5 HP (around 3700W) and shifts a lot of water, the electric ones would need to draw 310 amps to do the same work at 12V supply. The biggest ones I see on their site draw 5.5A @ 24V which assuming perfect efficiency is about 137W or 0.18HP. Draw your own conclusions but remember it's an expensive engine.

[jonathantwidale]

I use a Davies Craig EWP 80 as an additional pump to keep my car nice and cool for installation in my Westfield. It kept it at 90-95 for 60 minutes stop start in traffic. I did use this EWP80 as the only pump in my Rover V8 (300bhp) in the same car and it did just work, but with the increased power of the AJP I don't think it would work. A larger one might but have no experience of this.

They do EWP 115 and 150 also.

cheers Jon

[Jhonno]

Pierburg CWA200 is the one to use.. Aide runs one in his beautiful Cerb and I've seen it sat in the sun for over an hour running maintaining a constant 88°c..

[john wyatt]

Thanks gents, I would have been most happy retaining the standard pump, however it is a hassle,I could do without to pull engine., source an impeller and fit, thanks for suggestion re Pierburg will follow that up