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Electric water pump http://www.gtmdrivers.com/forum/electric-water-pump-t3336.html |
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Author: | Larkingabout [ Tue Dec 29, 2015 8:49 am ] |
Post subject: | Electric water pump |
Just about to start the cooling system upgrade with the new Passat radiator and a 12 inch Spal fan. I was also thinking of an electric water pump Davies Craig ewp80 and removing the existing mechanical pump. However just had a thought that the heater won't work properly with the electric pump as it pulses and works via its controller. My simple mind would be that another small pump would need to be installed on the heater pipe work which is switched on every time the heater/fan is switched on. However sounds like more pumps than I really want. Only trying to placate my wife who likes warm feet as mot much heat seems to get to my side. If anyone has installed one on a Spyder/Libra and a diagram is available I would be very grateful |
Author: | cubera [ Tue Dec 29, 2015 11:11 am ] |
Post subject: | Re: Electric water pump |
I have researched this pretty thoroughly, and am sticking with the standard pump, in a pretty much standard VVC 160. I think you have to have a very good reason for going to the extra trouble and expense of an electric pump with very questionable benefits. For one thing, you have to be sure that you will actually shift a greater volume of water through the system. You may well achieve this in other ways, such as optimising the pipework, taking care to avoid diameter changes and steps in pipe joints, which will deter good flow in just the same way as roughness and obstructions reduce gas flow in a cylinder head. On the subject of which, it would be worth cleaning up the water-ways in the top of the block and in the head itself - especially if the head is coming off to improve the head gasket situation. There is at least one extensive review in the old TGTM archive which sheds a good deal of light on the subject, also referring to the importance of persuading as much air as possible to actually pass through your nice new radiator rather than avoiding it. So far as the good lady's feet are concerned, I am given to understand that suitable boots are available, though the price may be un-palatable. |
Author: | sidewinder [ Tue Dec 29, 2015 11:26 am ] |
Post subject: | Re: Electric water pump |
If you have a standard heater unit/control setup, with the direction lever set to 'down' all the air is blown into the passenger footwell as the unit is above there. SAS |
Author: | Larkingabout [ Tue Dec 29, 2015 12:19 pm ] |
Post subject: | Re: Electric water pump |
Thanks for the sound advice. Everything on the head front and pipes is ok as I had a rebuild last summer and did all the cooling hoses etc. The Metro rad is right on the limit and as i go Continental quite a bit in hotter climes I feel the larger rad is essential. I will go with the fan and new rad and see how we go. Re the good ladies feet, who am I to argue as to who should have all the heat!!! Our last car had no heater at all so she is being spoilt anyway. |
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