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Electric Water pump

 
 
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ben_haynes
Gate Opener


Joined: 25 Oct 2009
Odometer: 41
Location: Kettering, Northants


1984 Land Rover Range Rover

PostPosted: Sun Jan 31, 2010 12:28 am    Post subject: Electric Water pump Reply with quote

will i need a 12v electric water pump, to run between the engine and the radiator which is being moved to the rear of the trialer,

will i need one for taking it from the engine to the radiator, and one for pumping it back to the engine, or will just one pumping it to the rad or from the rad

if so where do i get one or two from, dont mind if i have to go hunting down the scrappy for them, as i am up there regularly

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Ben Haynes

1984(B) Rangie Vouge V8 Auto (DENT) (Mine)
1996(P) Discovery 300TDi Auto (Mums)
1995(N) P38 Rangie 4.0 V8 (Dads)
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ben_haynes
Gate Opener


Joined: 25 Oct 2009
Odometer: 41
Location: Kettering, Northants


1984 Land Rover Range Rover

PostPosted: Sun Jan 31, 2010 8:44 am    Post subject: Reply with quote

Cheers dennis,

one for the whole system?? or one to rad and one back??

and what VW's have it?? and will Audi, and Skoda have them aswell??

sorry for the questions, just want to make sure i have everything before i start building it, incase i cant get hold of parts easy

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Ben Haynes

1984(B) Rangie Vouge V8 Auto (DENT) (Mine)
1996(P) Discovery 300TDi Auto (Mums)
1995(N) P38 Rangie 4.0 V8 (Dads)
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bazza_413
Just got MTs


Joined: 28 Aug 2006
Odometer: 258
Location: Eastbourne



PostPosted: Sun Jan 31, 2010 10:09 am    Post subject: Reply with quote

If this link works it should show a load of electric water pumps listed on Ebay
http://shop.ebay.co.uk/i.html?LH_AvailTo=3&...rr%3D1&_rdc=1

Have used a similar type pump on electric vehicles for cooling and never had any issues with flow rate, worth having a guesstimate of the volume of liquid in your cooling system to make sure you can over spec on flow rate.
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Kitesurf
Difflock Royalty


Joined: 28 Feb 2005
Odometer: 14197
Location: Luton, Beds


1994 Toyota Surf

PostPosted: Sun Jan 31, 2010 7:02 pm    Post subject: Reply with quote

From looking at that listing I take it that no European VWs have electric water pumps?? Confused Either that or there is no market for them on this side of the pond.
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Motorist who drove his 4x4 up Snowdon sentenced to appear on Top Gear.
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4x4menow
Articulating


Joined: 02 Apr 2004
Odometer: 553
Location: stroud



PostPosted: Sun Jan 31, 2010 7:06 pm    Post subject: Reply with quote

Got an electric pump on my SJ one pump does it all got it from a local motor sport supplier used alot on track cars and that sort of thing.
cost about £130 easy to fit and wire up.
Cheers Nick
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Nathaniel
Difflock Royalty


Joined: 13 May 2003
Odometer: 17901
Location: North, North Yorkshire


1979 Suzuki LJ

PostPosted: Sun Jan 31, 2010 8:16 pm    Post subject: Reply with quote

Demon tweeks do one, I think its variable speed too.

Another option that is used in stock car racing is a 12V diesel transfer pump - works well and is cheaper than the proper jobbie.

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Nat

If You Open Your Mind Too Much Your Brain Will Fall Out
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w3526602
Difflock Royalty


Joined: 10 Jun 2002
Odometer: 10713
Location: Glynneath, South Wales



PostPosted: Mon Feb 01, 2010 5:39 am    Post subject: Reply with quote

Hi,

The FIAT x1/9 has the engine in the rear, and the radiator in the front. Sorry, I can't remember where the filler cap is, but suspect that it will be in rear, above the engine. So long hoses are feasible.

As far as I am aware, this engine just used the standard FIAT belt driven water pump.

Having watched bottom hoses collapse at high revs (Morris J2 minibus), I would prefer to force coolant thru the system rather than suck it through.

602

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Don't force it, use a bigger hammer, cos if it doesn't fit, the hammer is not big enough.
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teamidris
Mud Obsessed


Joined: 24 Feb 2008
Odometer: 3350
Location: Staffordshire UK



PostPosted: Mon Feb 01, 2010 10:33 am    Post subject: Reply with quote

Are you sure you need one? On mine I recon the loss of flow from the engine pump (due to the back pressure of the distance) is compensated by the cooling that the steel pipes offer. On 1 3/4" steel tube you get 66 square inches of cooling surface per foot of pipe. On my truck that's about 9 square feet of extra cooling Very Happy
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Rizla 1
Articulating


Joined: 21 May 2007
Odometer: 656
Location: Berkshire



PostPosted: Mon Feb 01, 2010 2:42 pm    Post subject: Reply with quote

On my old rangie pick up - the V8 water pump was more than enough to cope with the full size rangie rad in the back.
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YotaDave
Articulating


Joined: 12 Nov 2007
Odometer: 958
Location: Bristol


1994 Toyota Landcruiser

PostPosted: Mon Feb 01, 2010 2:51 pm    Post subject: Reply with quote

As others have said I would have thought the standard engine driven pump would be able to cope. Why dont you check it by setting it all up with the longer pipes etc, put the pipes in a bucket of water and start the engine. Youll be able to see what sort of flow the rad will get then and decide whether you need a more powerful pump or not.

The reason race cars use electric pumps is not due to needing higher flow rates its because they dont want to run an engine driven pump as it saps the power from the engine. Some dont even run alternators, they just use a battery that will last the length of the race and charge/change it after.

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Dave (the Young Fart)


Last edited by YotaDave on Mon Feb 01, 2010 4:34 pm; edited 1 time in total
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w3526602
Difflock Royalty


Joined: 10 Jun 2002
Odometer: 10713
Location: Glynneath, South Wales



PostPosted: Mon Feb 01, 2010 3:43 pm    Post subject: Reply with quote

Hi,

I read of one bloke who had a device to disconect the dynamo (long time ago) if his foot was on the loud pedal. It only charged while he was slowing down.

Any time that your foot isn't either hard on the gas, or hard on brake, is wasted ..... in a race, of course.

602

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Don't force it, use a bigger hammer, cos if it doesn't fit, the hammer is not big enough.
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YotaDave
Articulating


Joined: 12 Nov 2007
Odometer: 958
Location: Bristol


1994 Toyota Landcruiser

PostPosted: Mon Feb 01, 2010 4:41 pm    Post subject: Reply with quote

w3526602 wrote:
I read of one bloke who had a device to disconect the dynamo (long time ago) if his foot was on the loud pedal. It only charged while he was slowing down.


That is not a bad idea. All you would need is pulleys with electronic clutches (like the ones for aircon compressors) and a switch under the accelerator pedal that would de-activate them when you booted it. Of course youd need 2 pulleys if you were also running a belt driven water pump but youd probably get a few extra horses out of the engine with the pulleys disengaged.

Hmmmmmmmm............ Cool

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Dave (the Young Fart)
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thinfourth
Just got MTs


Joined: 24 Apr 2005
Odometer: 257




PostPosted: Mon Feb 01, 2010 6:18 pm    Post subject: Reply with quote

YotaDave wrote:
w3526602 wrote:
I read of one bloke who had a device to disconect the dynamo (long time ago) if his foot was on the loud pedal. It only charged while he was slowing down.


That is not a bad idea. All you would need is pulleys with electronic clutches (like the ones for aircon compressors) and a switch under the accelerator pedal that would de-activate them when you booted it. Of course youd need 2 pulleys if you were also running a belt driven water pump but youd probably get a few extra horses out of the engine with the pulleys disengaged.

Hmmmmmmmm............ Cool


Why so complicated

I can't remember exactly how but all you need do is diddle with the regulator and you can unload the alternator
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w3526602
Difflock Royalty


Joined: 10 Jun 2002
Odometer: 10713
Location: Glynneath, South Wales



PostPosted: Tue Feb 02, 2010 6:39 am    Post subject: Reply with quote

Hi,

As far as I can remember, he just unswitched the wiring from dynamo.

Switch was activatated by vacuum from his manifold ... boot off = high vacuum, boot down = low vacuum. I guess the dynamo kept spinning, but "no load".

Was it worth it? Dunno! But if you have been racing for an hour, and you come second by a nose, I guess you would wish you had a just smidgen more horsepower.

602

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Don't force it, use a bigger hammer, cos if it doesn't fit, the hammer is not big enough.
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