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ben_haynes Gate Opener
Joined: 25 Oct 2009 Odometer: 41 Location: Kettering, Northants
1984 Land Rover Range Rover
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Posted: Sun Jan 31, 2010 12:28 am Post subject: Electric Water pump
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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
__________________________________ 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
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Posted: Sun Jan 31, 2010 8:44 am Post subject:
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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
__________________________________ 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
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Posted: Sun Jan 31, 2010 10:09 am Post subject:
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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
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Posted: Sun Jan 31, 2010 7:02 pm Post subject:
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From looking at that listing I take it that no European VWs have electric water pumps?? Either that or there is no market for them on this side of the pond.
__________________________________ 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
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Posted: Sun Jan 31, 2010 7:06 pm Post subject:
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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
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Posted: Sun Jan 31, 2010 8:16 pm Post subject:
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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.
__________________________________ 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: 10758 Location: Glynneath, South Wales
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Posted: Mon Feb 01, 2010 5:39 am Post subject:
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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
__________________________________ 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: 3372 Location: Staffordshire UK
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Posted: Mon Feb 01, 2010 10:33 am Post subject:
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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
__________________________________ https://m.youtube.com/channel/UC3l3zoaCabKrgBSULSV1YgA |
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Rizla 1 Articulating
Joined: 21 May 2007 Odometer: 656 Location: Berkshire
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Posted: Mon Feb 01, 2010 2:42 pm Post subject:
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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
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Posted: Mon Feb 01, 2010 2:51 pm Post subject:
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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.
__________________________________ 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: 10758 Location: Glynneath, South Wales
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Posted: Mon Feb 01, 2010 3:43 pm Post subject:
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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
__________________________________ 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
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Posted: Mon Feb 01, 2010 4:41 pm Post subject:
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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............
__________________________________ Dave (the Young Fart) |
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thinfourth Just got MTs
Joined: 24 Apr 2005 Odometer: 257
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Posted: Mon Feb 01, 2010 6:18 pm Post subject:
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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............ |
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: 10758 Location: Glynneath, South Wales
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Posted: Tue Feb 02, 2010 6:39 am Post subject:
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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
__________________________________ Don't force it, use a bigger hammer, cos if it doesn't fit, the hammer is not big enough. |
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