any-one fitted electric water pump ?

[magpies]

Hi
I'm looking to fit an electric water pump instead of the belt driven unit - I am fitting a Jag AJ30 V6 to my TVR.

Anyone have experience of this?

[ndtman]

This thread might be of help

https://www.pistonheads.com/gassing/topic.asp?h=0&...

[Skyedriver]

Hi, there's a chap in Richmond with a Lotus Excel and a Clan Crusader who has the Davis Craig electric water pump and various other water related mods to his cars.
Nice guy, works over Teeside somewhere, can pm you a method of contacting him via the Lotus Excel web site if required

[magpies]

Skyedriver said:

Hi, there's a chap in Richmond with a Lotus Excel and a Clan Crusader who has the Davis Craig electric water pump and various other water related mods to his cars.
Nice guy, works over Teeside somewhere, can pm you a method of contacting him via the Lotus Excel web site if required

Yes please - I live less than 20 miles from Richmond

[B33FY]

Got a 150 plus controller fitted to my rover v8 engined 7. They work well.

[Skyedriver]

magpies said:

Skyedriver said:

Hi, there's a chap in Richmond with a Lotus Excel and a Clan Crusader who has the Davis Craig electric water pump and various other water related mods to his cars.
Nice guy, works over Teeside somewhere, can pm you a method of contacting him via the Lotus Excel web site if required

Yes please - I live less than 20 miles from Richmond

Just messaged him for approval before passing name etc

[Bronco_jr]

A few of the Challenger Owners have gone down this route with Davis Crag kits. They all seem to wok well and resolve the cooling issues with the big jag lump.

[Skyedriver]

Hi Mick, pm'd you yesterday, if you pass me a contact, I'll pass it over, he's happy to assist.

[jontysafe]

I’m thinking of running one in parallel to the mechanical pump in a rear radiator converted Yb turbo 7.
There are a LOT better pumps out there than the Davies Craig setups.
The BMW electric water pumps as fitted to 335i and other 35 models are heaps better. You can also buy an after market controller as well: https://www.tecomotive.com/en/products/tinycwa.htm...


Certain Meziere (usa) pumps are a good bet as well. Show a DAvies Craig pump any sort of pressure and flow completely dies.

Edited by jontysafe on Tuesday 19th February 23:07

[magpies]

jontysafe said:

I’m thinking of running one in parallel to the mechanical pump in a rear radiator converted Yb turbo 7.
There are a LOT better pumps out there than the Davies Craig setups.
The BMW electric water pumps as fitted to 335i and other 35 models are heaps better. You can also buy an after market controller as well: https://www.tecomotive.com/en/products/tinycwa.htm...


Certain Meziere (usa) pumps are a good bet as well. Show a DAvies Craig pump any sort of pressure and flow completely dies.

Edited by jontysafe on Tuesday 19th February 23:07

The tecomotive controllers are £150 and the bmw pumps about £200

[jontysafe]

Yes that sounds about right.

Ask someone who knows a lot more than I do like Max about Davies Craig pumps. Flow at zero pressure is ok, introduce an engine and cooling circuit at operating temp and higher and first thing you’re gonna get is det. Don’t forget cooling is first about stopping det.

The flow characteristics are truly awful.

Edited by jontysafe on Wednesday 20th February 19:42

[magpies]

jontysafe said:

Yes that sounds about right.

Ask someone who knows a lot more than I do like Max about Davies Craig pumps. Flow at zero pressure is ok, introduce an engine and cooling circuit at operating temp and higher and first thing you’re gonna get is det. Don’t forget cooling is first about stopping det.

The flow characteristics are truly awful.

Edited by jontysafe on Wednesday 20th February 19:42

must admit I'd rather use an OEM pump

[gtmdriver]

I used a Davies Craig on my GTM Coupe many years ago (before OEM electric pumps were readily available).


The standard engine driven pump wasn't pushing enough water from the rear mounted A series engine to the front mounted rad.


The Davies Craig set up was so efficient that I could also use a Laminova oil/water intercooler to cool the oil using the coolant water without any overheating problems at all.

[magpies]

magpies said:

The tecomotive controllers are £150 and the bmw pumps about £200

I've ordered the Tecomotive TinyCWA controller and Pierburg CWA200 pump package

apparently these can be run without a thermostat in the system, making the pipework simple

Anyone done this?

[witko999]

Yes, me. Without a thermostat the running temp of the car (whilst moving) never exceeded about 55c.

I think the minimum flow of the pump is still enough to provide excess cooling. You're better off just designing the system to keep the thermostat.

[magpies]

witko999 said:

Yes, me. Without a thermostat the running temp of the car (whilst moving) never exceeded about 55c.

I think the minimum flow of the pump is still enough to provide excess cooling. You're better off just designing the system to keep the thermostat.

Thanks for that - I'll look into the design.

Do you have a schematic as to how you did it?

[dexion7]

most (road) cars which overheat do so at idle or moving slowly and it's under these conditions that moving more water per unit time through the engine and rad can make a signifcant difference.

belt driven mechanical water pumps generally move their least amount of water at low engine speed whereas leccy ones can give max water movement irrespective of engine speed.

the pierburg water pumps (as used in BMW etc) are good

[witko999]

magpies said:

witko999 said:

Yes, me. Without a thermostat the running temp of the car (whilst moving) never exceeded about 55c.

I think the minimum flow of the pump is still enough to provide excess cooling. You're better off just designing the system to keep the thermostat.

Thanks for that - I'll look into the design.

Do you have a schematic as to how you did it?

It's just a standard cooling circuit. Pump mounted low down sucking water from the bottom rad outlet. Pump outlet to main engine inlet. I completely cut off the original water pump casting and fabricated an inlet to bolt to the engine. Heater circuit might take some thought if you're using one and the temp sensor for the water pump must be fitted in the engine circuit (ie. On the engine side of the thermostat so it's always measuring engine temperature).