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If the float needle/seat leaks I can understand that the fuel level in the =
float bowl could rise & that would affect the idle & mixture. However, if t=
hey are not leaking & assuming your float bowels are correctly vented, I do=
not see any way that the pressure of the pump (if it is within factory spe=
cifications) would affect the "float buoyancy". The pressure in the float b=
owl is atmospheric pressure, not pump pressure.Gary Hodson=C2=A0
-----Original Message-----
From: Larry Varley <varley@cosmos.net.au>
To: michaelsalter <michaelsalter@gmail.com>; healeys <healeys@autox.team.ne=
t>
Sent: Thu, Nov 29, 2018 8:28 pm
Subject: Re: [Healeys] Fuel pumps (AGAIN!)
#yiv9667186109 #yiv9667186109 -- _filtered #yiv9667186109 {font-family:Wing=
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le17 {color:#1F497D;} #yiv9667186109 .yiv9667186109MsoChpDefault {} _filter=
ed #yiv9667186109 {margin:72.0pt 72.0pt 72.0pt 72.0pt;} #yiv9667186109 div.=
yiv9667186109WordSection1 {} #yiv9667186109 Hi Mike. Naturally you have an =
SU pump test rig J image attached. All I can tell you for certain is that r=
educing the pressure makes a considerable difference. Both cars need to run=
on choke for longer after cold start and both have a stable and repeatable=
=C2=A0idle speed and at running temperature. Both also have new needle and=
seats in the carbs and set correctly. I=E2=80=99m not saying they necessar=
ily leak but I do think the extra pressure causes a higher fuel level at id=
le simply due to float buoyancy and very little fuel being used. In the end=
what good is more pressure than you need? As long as you get enough flow y=
ou don=E2=80=99t need the pressure. CheersLarry Varley_____________________=
__________________________
Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archiv=
e
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<font color=3D'black' size=3D'2' face=3D'arial'>
<div>If the float needle/seat leaks I can understand that the fuel level in=
the float bowl could rise & that would affect the idle & mixture. =
However, if they are not leaking & assuming your float bowels are corre=
ctly vented, I do not see any way that the pressure of the pump (if it is w=
ithin factory specifications) would affect the "float buoyancy". The pressu=
re in the float bowl is atmospheric pressure, not pump pressure.</div>
<div>Gary Hodson <br>
</div>
<br>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Larry Varley <varley@cosmos.net.au><br>
To: michaelsalter <michaelsalter@gmail.com>; healeys <healeys@auto=
x.team.net><br>
Sent: Thu, Nov 29, 2018 8:28 pm<br>
Subject: Re: [Healeys] Fuel pumps (AGAIN!)<br>
<br>
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;text-decoration:underline;} #yiv9667186109 a:visited, #yiv9667186109 span.=
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<div>
<div class=3D"yiv9667186109WordSection1">
<div class=3D"yiv9667186109MsoNormal"><span style=3D"font-size:11.0pt;">Hi =
Mike. Naturally you have an SU pump test rig </span><span style=3D"font-siz=
e:11.0pt;font-family:Wingdings;color:#1F497D;">J</span><span style=3D"font-=
size:11.0pt;"> image attached. All I can tell you for certain is that reduc=
ing the pressure makes a considerable difference. Both cars need to run on =
choke for longer after cold start and both have a stable and repeatable &nb=
sp;idle speed and at running temperature. Both also have new needle and sea=
ts in the carbs and set correctly. I=E2=80=99m not saying they necessarily =
leak but I do think the extra pressure causes a higher fuel level at idle s=
imply due to float buoyancy and very little fuel being used. In the end wha=
t good is more pressure than you need? As long as you get enough flow you d=
on=E2=80=99t need the pressure. </span></div>
<div class=3D"yiv9667186109MsoNormal"><span style=3D"font-size:11.0pt;">Che=
ers</span></div>
<div class=3D"yiv9667186109yqt7747248989" id=3D"yiv9667186109yqtfd36827"></=
div>
<div class=3D"yiv9667186109yqt7747248989" id=3D"yiv9667186109yqtfd67363">
<div class=3D"yiv9667186109MsoNormal"><span style=3D"font-size:11.0pt;">Lar=
ry Varley</span></div>
</div>
</div>
</div>
</div>
<div class=3D"yqt7747248989" id=3D"yqtfd48460">____________________________=
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