Electric Water Pumps

[tacker]

Has anyone ever used one of these units as iwould like to see if my experience with them are the same.

[Ryan1200]

I'v used one on my 1200 with a ca18. Had problems at 1st until i used a proper davies craig pump controller. Without the controller we couldn't hold constant temp, after adding the controller it now works a treat. What experience are you having?

[discopotato03]

I really like the idea but the composite material they're made of worries me . I've seen too many "plastic" radiator tanks fail and I just don't have faith with non metalic materials in this app . If it cracks and dumps your coolant quickly it stands a good chance of damaging your engine .

If/when Davies Craig make an aluminium cased version I'll give them serious consideration . There is a lot to be said for a pump thats not mounted on the engine block - generally easier to service/replace . The one down side is that should your alternator fail its something else to draw electrical current .

If they can make system reliability better then more people would buy them .

OT but I'd even consider elec fans (one large one) provided it sensed off the radiator temperature rather than the engines jacket temperature . When you think about it for fans the rad temp is very important because this is where the cooler water comes from provided 1) its got some and 2) the thermostat lets it flow in .

Meanwhile back to the elec water pump (EWP) , cheers A .

[T04GTR]

hrmm. yeah pics on how its hooked up would be helpfull.

[tacker]

Best way i can think to discribe is.... its a gift from the gods!!!

I had my hand forced on thursday when for the second time in a month the water pump housing just cracked at the bottom this time and it was a N1 as well. So if it lasts longer than one track session i am quids in with my run with alloy water pumps. Brought the only possible soluiton ( electric as no other options here) even with having to repair the broken alloy housing. Thank the gods that i brought some alumimium solder, man does that stuff rock :-). We had to use the housing without the impeller so we removed the shaft and soldered a blanking plate over the end where we cut the bearing out of the housing. Covered the whole thing with a resin to made sure and connected the pump up which was about an hours work including the wiring.

Any way first run was not good, car got real hot in about 2 minutes then read instructions tell us to remove the thermostat. Got 3rd degree burns removing the little sucker.....fixed! car temp on long track runs was down from 96 with the N1 to 92 even with a 4 degree hot ambient temp on the day ( 42 ). No fan even but was very careful woth that though and would suggest a small thermofan to deal with that side of slow movement or traffic.

I brought the 110 litre/min unit it has its own small fan to keep it cool.

Disco i can follow your thoughts on the alt failing but that still leaves the battery to run the pump . If the belt was to break driving the alt would be the same. Where as if the belt driving the the alt and the water pump was to break, would result in no pump at all and the alt light you can help but notice when the belt or water pump housing breaks in two as i have found out twice now.

It not quite a plastic either its more like a fibre glass type material, you can see the fibre inforcment in the material. Any way it worked for me, very happy

[GeeTR]

Ha, tacker, looks like a red skin went MIA

Yah, they aren't plastic.. but have a fiber weaved through them. Have a friend who used two but removed due to lack of ability to control temps. (7 years ago) Im sure the new pumps with fans and proper controllers would work well.

Most would have heard me rant on about, electronic thermostats, electronic thermos and water pumps all controller via a well programmed IC. BMW's runs diff head temps depending on load. Damm - they push a current through the spark plug just after firing; and amount of resistance through the air between electrode and base pin somehow detects "per cylinder" AFR

One day, one day, i will have the time...

Sorry back on topic, the hardware seems sweet, just spend the time on the "smarts"

[tacker]

Geetr,

mate i am told the controlers are quite good and i will look at that later in the year. But for now with the temps well over 40c here at the momment and still only just landed in summer, i was really pleased with the 92 engine temp last time out. I could not believe the difference it made.