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With all the talk about fuel pumps where can I get one at a reasonable pric=
e for a BN6 1958 or have it rebuilt.=C2=A0 I got the bad news mine does not=
pump from the shop.ThanksGerry
=20
=20
=20
-----Original Message-----
From: Linwood Rose <linwoodrose@mac.com>
To: Larry Varley <varley@cosmos.net.au>
Cc: healeys <healeys@autox.team.net>
Sent: Thu, Nov 29, 2018 4:03 am
Subject: Re: [Healeys] Fuel pumps (AGAIN!)
Hi Larry,Very helpful info. I believe for the 3000 six cylinder cars the ou=
tput is 18 U.S. gallons versus 15 for the 100-6 six cylinder and the 4 cyli=
nder cars. I am both curious and lazy: what is the math to covert the 18 ga=
llon figure to pounds of pressure?Thanks_Lin
Sent from my iPad
On Nov 28, 2018, at 5:05 PM, Larry Varley <varley@cosmos.net.au> wrote:
#yiv9879785617 #yiv9879785617 -- _filtered #yiv9879785617 {font-family:Cali=
bri;panose-1:2 15 5 2 2 2 4 3 2 4;} #yiv9879785617 #yiv9879785617 p.yiv9879=
785617MsoNormal, #yiv9879785617 li.yiv9879785617MsoNormal, #yiv9879785617 d=
iv.yiv9879785617MsoNormal {margin:0cm;margin-bottom:.0001pt;font-size:12.0p=
t;font-family:New;} #yiv9879785617 a:link, #yiv9879785617 span.yiv987978561=
7MsoHyperlink {color:blue;text-decoration:underline;} #yiv9879785617 a:visi=
ted, #yiv9879785617 span.yiv9879785617MsoHyperlinkFollowed {color:purple;te=
xt-decoration:underline;} #yiv9879785617 p {margin-right:0cm;margin-left:0c=
m;font-size:12.0pt;font-family:New;} #yiv9879785617 span.yiv9879785617Email=
Style18 {color:#1F497D;} #yiv9879785617 .yiv9879785617MsoChpDefault {font-s=
ize:10.0pt;} _filtered #yiv9879785617 {margin:72.0pt 72.0pt 72.0pt 72.0pt;}=
#yiv9879785617 div.yiv9879785617WordSection1 {} #yiv9879785617 Hi Group. S=
omething worth considering when dealing with SU carburetors and fuel pumps.=
I have been doing some investigation and testing the effects of fuel press=
ure on SU carburetors. The image attached is the correct specification for =
SU fuel pumps for the brass float version carbs. The SU HP pump is quoted a=
s 48 inch( petrol ) lift which is about 1.5 PSI. This document is from a 19=
50=E2=80=99s workshop manual. I have tested one of my cars and the SU pump =
sold by all of the usual suppliers has a petrol lift of over 10 feet. I est=
imate at least 2.5 PSI. I had my brother test his Healey 100 also and the s=
ame result. The test was conducted attaching a clear plastic line from the =
fuel supply line up in the air to show the lift. We have both fitted pressu=
re regulators and using the clear tube method set the pressure to 48 inches=
( 1.5 PSI ). The result in both cars that have wide band oxygen sensors fi=
tted is an immediate improvement in air fuel ratio at idle, moving away fro=
m overly rich mixture. Both cars maintain a far better and regular idle as =
they are no longer running rich at idle. I believe that the carbs are barel=
y able to maintain a constant fuel level in the float bowls when the pressu=
re is 2.5 PSI and that pressure pushes the fuel level up in the bowls when =
the engine is not consuming much fuel. At all other speeds both engines fin=
e with good air fuel ratio at 1.5 PSI fuel pressure.RegardsLarry Varley
<20181008_133235.jpg>
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e
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se@mac.com
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e
Healeys@autox.team.net
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y@netscape.net
------=_Part_1134876_76457530.1543526937186
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<font color=3D'black' size=3D'2' face=3D'arial'>
<div>Wi<font size=3D"2">th all the talk about fuel pumps where can I get on=
e at a reasonable price for a BN6 1958 or have it rebuilt. I got the =
bad news mine does not pump from the shop.</font></div>
<div><font size=3D"2">Thanks</font></div>
<div><font size=3D"2">Gerry<br>
</font></div>
<div> <br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Linwood Rose <linwoodrose@mac.com><br>
To: Larry Varley <varley@cosmos.net.au><br>
Cc: healeys <healeys@autox.team.net><br>
Sent: Thu, Nov 29, 2018 4:03 am<br>
Subject: Re: [Healeys] Fuel pumps (AGAIN!)<br>
<br>
<div id=3D"yiv9879785617">
<div>Hi Larry,
<div>Very helpful info. I believe for the 3000 six cylinder cars the output=
is 18 U.S. gallons versus 15 for the 100-6 six cylinder and the 4 cylinder=
cars. I am both curious and lazy: what is the math to covert the 18 gallon=
figure to pounds of pressure?</div>
<div>Thanks_</div>
<div>Lin<br clear=3D"none"><br clear=3D"none">
<div dir=3D"ltr" id=3D"yiv9879785617AppleMailSignature">Sent from my iPad</=
div>
<div class=3D"yiv9879785617yqt3184380744" id=3D"yiv9879785617yqt58710">
<div dir=3D"ltr"><br clear=3D"none">On Nov 28, 2018, at 5:05 PM, Larry Varl=
ey <<a rel=3D"noopener noreferrer" shape=3D"rect" ymailto=3D"mailto:varl=
ey@cosmos.net.au" target=3D"_blank" href=3D"mailto:varley@cosmos.net.au";>va=
rley@cosmos.net.au</a>> wrote:<br clear=3D"none"><br clear=3D"none"></di=
v>
<blockquote type=3D"cite">
<div dir=3D"ltr"></div>
</blockquote></div>
</div>
</div>
<div class=3D"yiv9879785617yqt3184380744" id=3D"yiv9879785617yqt91158"><sty=
le>#yiv9879785617 #yiv9879785617 -- _filtered #yiv9879785617 {font-famil=
y:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} #yiv9879785617 #yiv9879785617 p=
.yiv9879785617MsoNormal, #yiv9879785617 li.yiv9879785617MsoNormal, #yiv9879=
785617 div.yiv9879785617MsoNormal {margin:0cm;margin-bottom:.0001pt;font-s=
ize:12.0pt;font-family:New;} #yiv9879785617 a:link, #yiv9879785617 span.yiv=
9879785617MsoHyperlink {color:blue;text-decoration:underline;} #yiv9879785=
617 a:visited, #yiv9879785617 span.yiv9879785617MsoHyperlinkFollowed {colo=
r:purple;text-decoration:underline;} #yiv9879785617 p {margin-right:0cm;ma=
rgin-left:0cm;font-size:12.0pt;font-family:New;} #yiv9879785617 span.yiv987=
9785617EmailStyle18 {color:#1F497D;} #yiv9879785617 .yiv9879785617MsoChpDe=
fault {font-size:10.0pt;} _filtered #yiv9879785617 {margin:72.0pt 72.0pt =
72.0pt 72.0pt;} #yiv9879785617 div.yiv9879785617WordSection1 {} #yiv987978=
5617 </style>
<div>
<div class=3D"yiv9879785617WordSection1">
<div class=3D"yiv9879785617MsoNormal"><span style=3D"font-size:11.0pt;">Hi =
Group. Something worth considering when dealing with SU carburetors and fue=
l pumps. I have been doing some investigation and testing the effects of fu=
el pressure on SU carburetors. The image attached is the correct specificat=
ion for SU fuel pumps for the brass float version carbs. The SU HP pump is =
quoted as 48 inch( petrol ) lift which is about 1.5 PSI. This document is f=
rom a 1950=E2=80=99s workshop manual. I have tested one of my cars and the =
SU pump sold by all of the usual suppliers has a petrol lift of over 10 fee=
t. I estimate at least 2.5 PSI. I had my brother test his Healey 100 also a=
nd the same result. The test was conducted attaching a clear plastic line f=
rom the fuel supply line up in the air to show the lift. We have both fitte=
d pressure regulators and using the clear tube method set the pressure to 4=
8 inches ( 1.5 PSI ). The result in both cars that have wide band oxygen se=
nsors fitted is an immediate improvement in air fuel ratio at idle, moving =
away from overly rich mixture. Both cars maintain a far better and regular =
idle as they are no longer running rich at idle. I believe that the carbs a=
re barely able to maintain a constant fuel level in the float bowls when th=
e pressure is 2.5 PSI and that pressure pushes the fuel level up in the bow=
ls when the engine is not consuming much fuel. At all other speeds both eng=
ines fine with good air fuel ratio at 1.5 PSI fuel pressure.</span></div>
<div class=3D"yiv9879785617MsoNormal"><span style=3D"font-size:11.0pt;">Reg=
ards</span></div>
<div class=3D"yiv9879785617MsoNormal"><span style=3D"font-size:11.0pt;">Lar=
ry Varley</span></div>
</div>
<blockquote type=3D"cite">
<div dir=3D"ltr"><20181008_133235.jpg></div>
</blockquote><blockquote type=3D"cite">
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