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 Post subject: Power to the Pump
PostPosted: Sun Aug 10, 2008 11:32 pm 
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848cc
848cc

Joined: Mon May 30, 2005 2:00 am
Posts: 46
Location: Sydney
Used the search function and found the previous post about power supply to an electric pmp.
Question i'll ask is can you take power from the Auxiliary terminal on the alternator so as when the motor runs the pump is powered and when stopped, the pump stops.I amagine you would still use an inline fuse in case of short or is this not necessary.

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 Post subject:
PostPosted: Sun Aug 10, 2008 11:53 pm 
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SooperDooperMiniCooper ExpertEngineering
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Joined: Fri Apr 29, 2005 9:46 am
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Location: Under the bonnet son!
It's not the best place to take power from for anything. It's shoddy, looks terrible, adds about a meter to your power run and is best avoided.

Use the fuse box, there is a permanently on fuse and a switched fuse. If you are worried about current draw through the switched fuse overloading the circuit, power it from the upstream (supplied) side and put an inline fuse to the fuel pump.

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PostPosted: Mon Aug 11, 2008 10:47 pm 
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848cc
848cc

Joined: Mon May 30, 2005 2:00 am
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Location: Sydney
Thanks Mick I'll do just that. :)

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PostPosted: Tue Aug 12, 2008 10:46 am 
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ausmini mod
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Joined: Tue Jun 06, 2006 8:47 am
Posts: 1938
Location: Kellyville, NSW
Yeah I wouldnt go off the alt either.
Mine runs from Acc on the ignition... so if you stall the car the pump will keep running, ie/ then you can clutch start or restart it. I have switches to 'kill' the pump for when I am mucking around with radio, etc or I dont want it to run...

Pete

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 Post subject:
PostPosted: Tue Aug 12, 2008 10:51 am 
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1275cc
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Joined: Tue Mar 16, 2004 10:34 am
Posts: 2067
Location: Canberra
If you really want to have the fuel pump only run when the engine is on, then buy a Facet oil pressure switch. It is basically a relay that runs off oil pressure so that the fuel pump only runs when there is oil pressure (ie engine running). It also has an extra bypass wire to connect to your starter solenoid that gives power to your fuel pump when you are cranking the engine, for ease of starting.


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