[Healeys] Quick Question - Square Body Fuel Pump / conversiont to neg ground

Earl Kagna kags at shaw.ca
Thu Feb 7 10:34:38 MST 2008


Alan:

If there is a 'thing' under the bakelite cover, and it is a capacitor (as it 
most likely is), the pump can be connected either POS or NEG ground.  If 
perchance someone has installed a diode as the arc suppression device, the 
pump will be polarity sensitive.  You would then have to reverse the diode 
connections in the pump in order to reverse the car's polarity and still use 
that pump.

Earl Kagna
Victoria, B.C.
BT7 tri-carb
BJ8

----- Original Message ----- 
From: "bispmotala" <bispmotala at hotmail.com>
To: "'John Vrugtman'" <javrugtman at htcnet.org>; "'Alan Seigrist'" 
<healey.nut at gmail.com>
Cc: "'Healey'" <Healeys at autox.team.net>
Sent: Thursday, February 07, 2008 5:01 AM
Subject: Re: [Healeys] Quick Question - Square Body Fuel Pump / conversiont 
to neg ground


Hi
First test. Open up the Bakelite cover. If the pump has "things" in it
connected to the points it can matter. If you just find plain points it
doesn't care about polarity.

Sven
Sweden
BJ8 and a few more things with SU pumps.
I have one of those converted to electronic switching with negative ground.

Alan Seigrist wrote:
> Hi All -
>
> Don't shoot me, this is a question I have for a Jag Mk IX I just bought.
>
> I am converting it to negative ground, and I've been told that the Square
> body fuel pumps on it won't work if I do this.  These are the same pumps
> used on Healeys.  I don't buy it, I think it doesn't make a difference (if
> old points pump).  Can anyone confirm?  Anything I have to do to convert
> them?
>
> Alan


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