--===============7962473293754850738==
--001a11c383bc8fc8c8051e38f60a
Kees,
I would have to disagree with your recommendation of adding a capacitor to
the circuit to try to stabilize the needle on any fuel gauge system as has
been mentioned previously on this list.
Capacitors are energy storage devices and the sudden discharge of that
energy creates sparks.
A fuel tank is normally filled with a mixture of fuel vapour and air.
Certainly the ratio of air to fuel vapour has to be correct for an
explosion to occur (around 6% vapour) but, should it be within the correct
range which I agree is fairly unlikely, and the capacitor choose to
discharge the consequences would be, shall we say, unfortunate.
Entirely up to you but I certainly don't like the idea and would definitely
not recommend it..
Michael S
BN1 #174
On Wed, Aug 26, 2015 at 7:49 AM, Oudesluys <coudesluijs@chello.nl> wrote:
> If a sender is not working properly it may be that a wrong type is fitted
> with a float lever rod that is to short, to long or bend in the wrong way.
> If it is to short the dial will indicate the full range from empty to full
> while the tank is not full when it reads empty correctly or the other way
> around. If the lever rod is to long the dial will not read its full scale
> indicating partially full when full and/or partially full when empty.
> Lengthening or shortening is a fairly easy operation but needs some
> experimenting and a dead level floor.
> Also a bend lever may lead to faulty readings similar to those above.
>
> On the early coil type gauges you can fit a big capacitor to counteract
> more or less the continuous restless moving about of the needle which you
> do not have on the later bi-metal gauges that give a steady reading.
> Kees Oudesluijs
>
>
>
> Op 26-8-2015 om 13:27 schreef Michael Salter:
>
> Actually a Healey fuel gauge can be made to work very accurately. The
> gauge in my 100 is as steady as a rock and a very accurate indicator of the
> tank contents.
> The only change I made was to add a tiny connecting link between the float
> arm and the body of the gauge sender as in the attached pic.
> Prior to doing this I had no idea that a gauge of this type could work so
> well.
>
> Michael S
> BN1 #174
>
> On Wed, Aug 26, 2015 at 1:18 AM, John Spaur <jmsdarch@sbcglobal.net>
> wrote:
>
>> Yes! Will you ever be able to adjust it so it works even remotely close to
>> accurate? I don't think so. There are many posts covering issues with the
>> fuel gauge and tank unit. My gauge and sender were "calibrated" by a
>> couple
>> of shops. The sender is a restored original. Afterwards, it would still
>> stick on full, then when over half a tank was used it would drop to 1/2,
>> then 1/4 and stop.
>>
>> I finally calibrated my gauge, with a little more success than the
>> professionals, using the calibration unit in this link:
>> http://mgaguru.com/mgtech/electric/fg_01.htm BTW, I pulled the sender
>> out of
>> the car and calibrated it on the bench. You will need to approximate the
>> high and low limits which are determined by the depth of the petrol tank.
>>
>> Be warned, it still is almost fruitless. I believe the problem is caused
>> by
>> how the fuel gauge T and B coils line up with the armature. The fuel gauge
>> needle is connected to the armature and swings based on the magnetic
>> current
>> supplied by the sending unit. Over the years the coils have tilted and
>> cannot be properly aligned with the armature when the nut is tightened.
>> This
>> throws off the adjustment.
>>
>> Let me know how it goes.
>>
>> Regards,
>>
>> John Spaur
>> '62 BT7
>>
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>>
>>
>
>
> --
> *If you can't fix it with a hammer, you've got an electrical problem.*
>
>
>
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--
*If you can't fix it with a hammer, you've got an electrical problem.*
--001a11c383bc8fc8c8051e38f60a
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:comic sa=
ns ms,sans-serif;font-size:small">Kees,<br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:comic sans ms,sans-serif;font-size:small">I would h=
ave to disagree with your recommendation of adding a capacitor to the circu=
it to try to stabilize the needle on any fuel gauge system as has been ment=
ioned previously on this list.<br></div><div class=3D"gmail_default" style=
=3D"font-family:comic sans ms,sans-serif;font-size:small">Capacitors are en=
ergy storage devices and the sudden discharge of that energy creates sparks=
. <br>A fuel tank is normally filled with a mixture of fuel vapour and air.=
Certainly the ratio of air to fuel vapour has to be correct for an explosi=
on to occur (around 6% vapour) but, should it be within the correct range w=
hich I agree is fairly unlikely, and the capacitor choose to discharge the =
consequences would be, shall we say, unfortunate. <br></div><div class=3D"g=
mail_default" style=3D"font-family:comic sans ms,sans-serif;font-size:small=
">Entirely up to you but I certainly don't like the idea and would defi=
nitely not recommend it.. <br></div><div class=3D"gmail_default" style=3D"f=
ont-family:comic sans ms,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:comic sans ms,sans-serif;font-size:=
small">Michael S<br></div><div class=3D"gmail_default" style=3D"font-family=
:comic sans ms,sans-serif;font-size:small">BN1 #174<br></div></div><div cla=
ss=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, Aug 26, 2015 at 7=
:49 AM, Oudesluys <span dir=3D"ltr"><<a href=3D"mailto:coudesluijs@chell=
o.nl" target=3D"_blank">coudesluijs@chello.nl</a>></span> wrote:<br><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #c=
cc solid;padding-left:1ex">
=20
=20
=20
<div text=3D"#000000" bgcolor=3D"#FFFFFF">
<div>If a sender is not working properly it
may be that a wrong type is fitted with a float lever rod that is
to short, to long or bend in the wrong way. If it is to short the
dial will indicate the full range from empty to full while the
tank is not full when it reads empty correctly or the other way
around. If the lever rod is to long the dial will not read its
full scale indicating partially full when full and/or partially
full when empty. Lengthening or shortening is a fairly easy
operation but needs some experimenting and a dead level floor.<br>
Also a bend lever may lead to faulty readings similar to those
above.<br>
<br>
On the early coil type gauges you can fit a big capacitor to
counteract more or less the continuous restless moving about of
the needle which you do not have on the later bi-metal gauges that
give a steady reading.<br>
Kees Oudesluijs<br>
<br>
<br>
<br>
Op 26-8-2015 om 13:27 schreef Michael Salter:<br>
</div>
<blockquote type=3D"cite"><div><div class=3D"h5">
=20
<div dir=3D"ltr">
<div class=3D"gmail_default">Actually a Healey fuel gauge can be
made to work very accurately. The gauge in my 100 is as steady
as a rock and a very accurate indicator of the tank contents.<br>
</div>
<div class=3D"gmail_default">The only change I made was to add a
tiny connecting link between the float arm and the body of the
gauge sender as in the attached pic.<br>
</div>
<div class=3D"gmail_default">Prior to doing this I had no idea
that a gauge of this type could work so well.<br>
<br>
</div>
<div class=3D"gmail_default">Michael S<br>
</div>
<div class=3D"gmail_default">BN1 #174<br>
</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Wed, Aug 26, 2015 at 1:18 AM, John
Spaur <span dir=3D"ltr"><<a href=3D"mailto:jmsdarch@sbcglobal.=
net" target=3D"_blank">jmsdarch@sbcglobal.net</a>></span>
wrote:<br>
<blockquote class=3D"gmail_quote">Yes! Will you ever be able to
adjust it so it works even remotely close to<br>
accurate? I don't think so. There are many posts covering
issues with the<br>
fuel gauge and tank unit. My gauge and sender were
"calibrated" by a couple<br>
of shops. The sender is a restored original. Afterwards, it
would still<br>
stick on full, then when over half a tank was used it would
drop to 1/2,<br>
then 1/4 and stop.<br>
<br>
I finally calibrated my gauge, with a little more success
than the<br>
professionals, using the calibration unit in this link:<br>
<a href=3D"http://mgaguru.com/mgtech/electric/fg_01.htm"; rel=3D=
"noreferrer" target=3D"_blank">http://mgaguru.com/mgtech/electric/fg_01.htm=
</a>
BTW, I pulled the sender out of<br>
the car and calibrated it on the bench. You will need to
approximate the<br>
high and low limits which are determined by the depth of the
petrol tank.<br>
<br>
Be warned, it still is almost fruitless. I believe the
problem is caused by<br>
how the fuel gauge T and B coils line up with the armature.
The fuel gauge<br>
needle is connected to the armature and swings based on the
magnetic current<br>
supplied by the sending unit. Over the years the coils have
tilted and<br>
cannot be properly aligned with the armature when the nut is
tightened. This<br>
throws off the adjustment.<br>
<br>
Let me know how it goes.<br>
<br>
Regards,<br>
<br>
John Spaur<br>
'62 BT7<br>
<div>
<div><br>
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</blockquote>
</div>
<br>
<br>
<br>
-- <br>
<div>
<div dir=3D"ltr">
<div>
<div dir=3D"ltr"><i><span>If you can't fix it with a hamm=
er,
you've got an electrical problem.</span></i><br>
<br>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
</div></div><pre><div><div class=3D"h5">_____________________________=
__________________
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=20
<p>Geen virus gevonden in dit bericht.<br>
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blank">www.avg.com</a><br>
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</blockquote>
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<br></blockquote></div><br><br clear=3D"all"><br>-- <br><div class=3D"gmail=
_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><i><font size=3D"2"><spa=
n style=3D"color:black">If you can't fix it with a hammer, you've g=
ot an electrical problem.</span></font></i><br><br><div></div><div></div><d=
iv></div></div></div></div></div>
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