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jodel(at)nildram.co.uk
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 Posted: Sat Feb 11, 2006 2:53 pm Post subject: Fuel pump wiring |
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Hi all,
I was just looking at the wiring for the Fuel pumps on the 914 and I came up
with a question.
FP1 is wired off the alternator. Would it make more sense to earth it
direct to the engine (no battery etc in the equation) or would you just go
to the normal -ve bus bar (or even the battery)?
cheers
Simon
G-BZTN kit 504
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paul.mcallister
Joined: 09 Jan 2006
Posts: 177
Location: Waukesha, WI USA
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| Posted: Sat Feb 11, 2006 5:07 pm Post subject: Fuel pump wiring |
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Simon,
I would encourage you to take a look at the Ground blocks offered by B&C.
Take a look at
http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?26X358218 and scroll
down the page.
I used a 48 tab block on the inside of the firewall and a 24 pin on the
engine side. The ground blocks were bolted together with a brass through
bolt. Using this type of approach gives you a single point ground for
everything, and its the first step to keeping ground loops out of your
system. This is where I grounded my fuel pumps to.
Regards, Paul
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nwcmc(at)tiscali.co.uk
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| Posted: Sun Feb 12, 2006 2:34 am Post subject: Fuel pump wiring |
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As long as your earth wiring is robust there will be no problem. However
if you want to cater for the worst case wire the earth to the regulator
earth connection. Any loss of earth wiring elsewhere in the system will
not affect supply to the pump.
Nigel Charles
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paul.mcallister
Joined: 09 Jan 2006
Posts: 177
Location: Waukesha, WI USA
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| Posted: Sun Feb 12, 2006 4:02 pm Post subject: Fuel pump wiring |
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Simon,
I came across this photograph, it decribes this type of grounding system I
mentioned in my previous post.
http://www.aeroelectric.com/Pictures/Grounding/gbusiso.jpg
Regards, Paul
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