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electric water pump

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426hemi View Drop Down
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    Posted: 06 Jun 2013 at 21:29
I have been looking at the davies craig leccy pumps and controller for ages but i haven't heard of anyone using them they say thet release extra power due to loosing the power sap of the impellor and better control of temp anyone had anything to do with them?
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kiwi_rsvr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kiwi_rsvr Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jun 2013 at 22:13
Weve used them on race ars before but I think they would be too impractical for a bike. Current draw on the pump motor possibly being the biggest issue.
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rossie View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rossie Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2013 at 19:56
With an electric pump for the coolant, you could let it pump a while after ignition swirch off. that has benefits. Sania's have oil pumps doing the same to release heat stress. Further on there's no real benefits. People always seem to forget that electric stuff saps power too.
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rossie View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rossie Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2013 at 19:57
You could use electric pumps to keep the coolant flow constant various rpm.
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Spoonz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Spoonz Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2013 at 20:44
I think the losses from the water pump would be minimal. You would lose more hp from having a badly adjusted or knackered chain. On a race motor where they look to gain every tiny bit from everywhere it's fair enough to go there but less so for a road bike where reliability is king really.

The flywheel would be the best place to go in terms of reducing inertia losses, as long as you keep it heavy enough to stop salling at low speed. Anything you have to accelerate or decelerate generates losses and the bigger the mass the bigger the loss.  Wheels, cranks, pistons, conrods, flywheels are the biggies.

Being a 60 degree motor you have to run balancers and that is negative power wise straight away.
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kiwi_rsvr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kiwi_rsvr Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2013 at 20:47
I would agree with Colin...reducing unsprung weight is where the advantages are to be gained.

The leccy water pump defo has advantages just not in the 2 wheel world.
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rossie View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rossie Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2013 at 21:24
In racing a battery is used without a generator. So ignition, cooling pump, rear light, quick shifter etc. don't draw power via the generator. (except in 4-, 6-, 8-, and 24 hour races...)
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426hemi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 426hemi Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jun 2013 at 00:23
So basically your better off having a good dump before you go out?
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IanG View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote IanG Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jun 2013 at 09:42
LOL

Saves having an embarrassing "moment"when you get a corner badly wrong as well
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Looking forward to the next track day
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