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If you are replacing the fuel pump go back to the original: SU AUF301 or
the modern equivalent Burlen/SU AZX1308. These pumps deliver the correct
flow and pressure (3,8psi). The AZX 1307 is often offered as a suitable
replacement, it is NOT as the delivery pressure is too low at 2,7psi.
The AUF 301 may be 303 or 305, there seems to be a few variations here,
the difference is possibly in the fuel line connections. You can go for
one of the two electronic versions, one with a magnet, the other optical
thus avoiding failure of the contact points. I would prefer the points
type as there is always a possibility to repair it at the road side,
being very simple in operation and the electronic versions may not have
a fantastic reliability record or so it seems. The points type is very
reliable under one condition: /regular use!! /
The best is an old properly rebuilt pump with the old 3-ply diaphragm.
Kees Oudesluijs
Op 12-1-2021 om 17:46 schreef Michael MacLean:
> The fuel pump is screwed to the floor just above the rear axle on the
> side opposite the exhaust pipe. The only part of the fuel feed system
> near any heat is where the steel line enters the engine bay. The fuel
> pump itself is a square facet type. It is larger physically than the
> Facet in my Bugeye and appears to have been installed quite a while
> ago by the looks of it. After my inspection yesterday just to see
> what kind of pump I had i started the car up for the first time since
> going to In n Out a few days ago. Immediately after startup it idled
> a little over 500 rpm. Since I bought the car 7 months ago startup has
> always been followed by an idle of 1000 rpm+. I attribute this high
> idle to the Weber carb and the difficulty tweaking it with the correct
> jets and adjustments. I have put together a set of HS6 SU carbs to
> replace the Weber. I'm leaning toward a fuel pump failure so far.
> Mike MacLean
>
> Sent from AT&T Yahoo Mail on Android
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>
> On Tue, Jan 12, 2021 at 6:21 AM, john harper
> <ah100tech@gmail.com> wrote:
> Chris
>
> I agree but there is still the problem with the pump and petrol
> feed being close to the hot exhaust silencer and pipe.
>
> I assume that this why the pipe was routed to the right-hand side
> of the chassis on later 3000
>
> Keep well
>
> On Tue, 12 Jan 2021 at 12:41, Chris Dimmock
>
> Is your fuel pump in the engine bay, or at the back, under the
> guard, near the tank?
> Pressurized fuel (where the pump is back near the tank) can
> tolerate engine bay heat far better than non pressurized fuel.
> As long as the pump isnâ??t heated, (next to e.g. the exhaust)
> itâ??s good.
> And as long as the fuel is pressurized in the fuel line, itâ??s
> fine as well.
> The problem is when you put the fuel pump in the engine bay,
> and that means the fuel in the line before the pump isnâ??t
> pressurized, and the pump is trying to cope with engine bay
> temps..
> and guess what!!!!
> Bazinga!!
> ð???
>
> > On 12 Jan 2021, at 11:46 am, Michael MacLean
>
> >
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<p>If you are replacing the fuel pump go back to the original: SU
AUF301 or the modern equivalent Burlen/SU AZX1308. These pumps
deliver the correct flow and pressure (3,8psi). The AZX 1307 is
often offered as a suitable replacement, it is NOT as the delivery
pressure is too low at 2,7psi. The AUF 301 may be 303 or 305,
there seems to be a few variations here, the difference is
possibly in the fuel line connections. You can go for one of the
two electronic versions, one with a magnet, the other optical thus
avoiding failure of the contact points. I would prefer the points
type as there is always a possibility to repair it at the road
side, being very simple in operation and the electronic versions
may not have a fantastic reliability record or so it seems. The
points type is very reliable under one condition: <i>regular
use!! </i><br>
</p>
<p>The best is an old properly rebuilt pump with the old 3-ply
diaphragm. <br>
</p>
<p>Kees Oudesluijs<br>
</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 12-1-2021 om 17:46 schreef Michael
MacLean:<br>
</div>
<blockquote type="cite"
cite="mid:2051841456.1214178.1610469976976@mail.yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
The fuel pump is screwed to the floor just above the rear axle on
the side opposite the exhaust pipe. The only part of the fuel
feed system near any heat is where the steel line enters the
engine bay. The fuel pump itself is a square facet type. It is
larger physically than the Facet in my Bugeye and appears to have
been installed quite a while ago by the looks of it. After my
inspection yesterday just to see what kind of pump I had i started
the car up for the first time since going to In n Out a few days
ago. Immediately after startup it idled a little over 500 rpm.Â
Since I bought the car 7 months ago startup has always been
followed by an idle of 1000 rpm+. I attribute this high idle to
the Weber carb and the difficulty tweaking it with the correct
jets and adjustments. I have put together a set of HS6 SU carbs
to replace the Weber. I'm leaning toward a fuel pump failure so
far.
<div id="yMail_cursorElementTracker_1610469961808">Mike MacLean<br>
<br>
<div id="ymail_android_signature"><a
id="ymail_android_signature_link"
href="https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature";
moz-do-not-send="true">Sent from AT&T Yahoo Mail on
Android</a></div>
<br>
<blockquote style="margin: 0 0 20px 0;">
<div style="font-family:Roboto, sans-serif; color:#6D00F6;">
<div>On Tue, Jan 12, 2021 at 6:21 AM, john harper</div>
<div><a class="moz-txt-link-rfc2396E"
href="mailto:ah100tech@gmail.com";><ah100tech@gmail.com></a> wrote:</div>
</div>
<div style="padding: 10px 0 0 20px; margin: 10px 0 0 0;
border-left: 1px solid #6D00F6;">
<div id="yiv6679904819">
<div>
<div dir="ltr">Chris
<div><br clear="none">
</div>
<div>I agree but there is still the problem with the
pump and petrol feed being close to the hot exhaust
silencer and pipe.</div>
<div><br clear="none">
</div>
<div>I assume that this why the pipe was routed to the
right-hand side of the chassis on later 3000</div>
<div><br clear="none">
</div>
<div>Keep well</div>
</div>
<br clear="none">
<div class="yiv6679904819gmail_quote">
<div class="yiv6679904819yqt4771715286"
id="yiv6679904819yqtfd78043">
<div class="yiv6679904819gmail_attr" dir="ltr">On
Tue, 12 Jan 2021 at 12:41, Chris Dimmock <<a
rel="nofollow noopener noreferrer" shape="rect"
ymailto="mailto:austin.healey@gmail.com";
target="_blank"
href="mailto:austin.healey@gmail.com";
moz-do-not-send="true">austin.healey@gmail.com</a>>
wrote:<br clear="none">
</div>
</div>
<blockquote class="yiv6679904819gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px
solid rgb(204,204,204);padding-left:1ex;">
<div class="yiv6679904819yqt4771715286"
id="yiv6679904819yqtfd08912">Is your fuel pump in
the engine bay, or at the back, under the guard,
near the tank?<br clear="none">
Pressurized fuel (where the pump is back near the
tank) can tolerate engine bay heat far better than
non pressurized fuel. <br clear="none">
As long as the pump isnâ??t heated, (next to e.g.
the exhaust) itâ??s good. <br clear="none">
And as long as the fuel is pressurized in the fuel
line, itâ??s fine as well. <br clear="none">
The problem is when you put the fuel pump in the
engine bay, and that means the fuel in the line
before the pump isnâ??t pressurized, and the pump is
trying to cope with engine bay temps.. <br
clear="none">
and guess what!!!!<br clear="none">
Bazinga!!<br clear="none">
ð???<br clear="none">
<br clear="none">
> On 12 Jan 2021, at 11:46 am, Michael MacLean
<<a rel="nofollow noopener noreferrer"
shape="rect"
ymailto="mailto:rrengineer.mike@att.net";
target="_blank"
href="mailto:rrengineer.mike@att.net";
moz-do-not-send="true">rrengineer.mike@att.net</a>>
wrote:</div>
<br clear="none">
> <br clear="none">
_______________________________________________<br
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Support Team.Net <a rel="nofollow noopener
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<div class="yiv6679904819yqt4771715286"
id="yiv6679904819yqtfd93817"><br clear="none">
<br clear="none">
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</blockquote>
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<div class="yiv6679904819yqt4771715286"
id="yiv6679904819yqtfd42952">
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