Subject: Re: [TR] TR-TR3 Fuel Pump

From: Geo Hahn <[email-masked]>
Date: Sun, 9 Sep 2018 16:50:22 -0700

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The Haynes manual says 1=C2=BC - 2=C2=BD psi.  I couldn't find that number =
in the STC
manual, just a reference to a 'well-defined spurt'.

It is indeed spurts as the pump cycles - unlike a fuel injection system
that demands a consistent pressure, all you need with SUs is enough to keep
up with demand and not so much that it overcomes the effect of the floats.

In my experience there is a pretty big range (possibly as high as 4 psi)
that works.

On Sun, Sep 9, 2018 at 5:33 AM, Lawrence Schwartz <[email-masked]> wrote:

> List, With reference to the TR3 mechanical fuel pump has anyone have or
> had problems when replacing the mechanical fuel pump with the PSI? I
> believe the standard mechanical fuel pumps puts out 3.5 of PSI. Correct a=
nd
> advise if i am correct/wrong. Thanks in advance. Larry Schwartz
>
> Sent from my iPhone
> ** [email-masked] **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs
> http://www.team.net/archive
>
> Unsubscribe/Manage: http://autox.team.net/mailman/
> options/triumphs/[email-masked]
>

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<div dir=3D"ltr">The Haynes manual says 1=C2=BC - 2=C2=BD psi.=C2=A0 I coul=
dn&#39;t find that number in the STC manual, just a reference to a &#39;wel=
l-defined spurt&#39;.<div><br></div><div>It is indeed spurts as the pump cy=
cles - unlike a fuel injection system that demands a consistent pressure, a=
ll you need with SUs is enough to keep up with demand and not so much that =
it overcomes the effect of the floats.</div><div><br></div><div>In my exper=
ience there is a pretty big range (possibly as high as 4 psi) that works.</=
div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sun,=
 Sep 9, 2018 at 5:33 AM, Lawrence Schwartz <span dir=3D"ltr">&lt;<a href=3D=
"mailto:[email-masked]" target=3D"_blank">[email-masked]</a>&gt;</span> wrote=
:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-le=
ft:1px #ccc solid;padding-left:1ex">List, With reference to the TR3 mechani=
cal fuel pump has anyone have or had problems when replacing the mechanical=
 fuel pump with the PSI? I believe the standard mechanical fuel pumps puts =
out 3.5 of PSI. Correct and advise if i am correct/wrong. Thanks in advance=
. Larry Schwartz <br>
<br>
Sent from my iPhone<br>
** <a href=3D"mailto:[email-masked]">[email-masked]</a> *=
*<br>
<br>
et=3D"_blank">http://www.team.net/donate.<wbr>html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
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 <a href=3D"http://www.team.net/archive" rel=3D"noreferrer" target=3D"_blan=
k">http://www.team.net/archive</a><br>
<br>
hs/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.=
team.net/mailman/<wbr>options/triumphs/ahwahneetr@<wbr>gmail.com</a><br>
</blockquote></div><br></div>

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From: Bruce Adornato <[email-masked]>
Date: Mon, 10 Sep 2018 06:59:44 -0700

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My TR3 uses a Facet Gold Flo 2.75-4 psi electric fuel pump to good effect.
Immediate startup, runs great.

bruce adornato
59 TR3

On Sun, Sep 9, 2018 at 4:50 PM, Geo Hahn <[email-masked]> wrote:

> The Haynes manual says 1=C2=BC - 2=C2=BD psi.  I couldn't find that numbe=
r in the
> STC manual, just a reference to a 'well-defined spurt'.
>
> that demands a consistent pressure, all you need with SUs is enough to ke=
ep
> up with demand and not so much that it overcomes the effect of the floats=
.
>> believe the standard mechanical fuel pumps puts out 3.5 of PSI. Correct =
and
> options/triumphs/[email-masked]
>
>

--=20
bruce adornato

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:large;color:#073763">My TR3 uses a Facet Gold =
Flo 2.75-4 psi electric fuel pump to good effect.=C2=A0 Immediate startup, =
runs great.</div><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:large;color:#073763"><br></div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:lar=
ge;color:#073763">bruce adornato</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:large;color:#073763">59 T=
R3</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On =
Sun, Sep 9, 2018 at 4:50 PM, Geo Hahn <span dir=3D"ltr">&lt;<a href=3D"mail=
to:[email-masked]" target=3D"_blank">[email-masked]</a>&gt;</sp=
an> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr">The Haynes ma=
nual says 1=C2=BC - 2=C2=BD psi.=C2=A0 I couldn&#39;t find that number in t=
he STC manual, just a reference to a &#39;well-defined spurt&#39;.<div><br>=
</div><div>It is indeed spurts as the pump cycles - unlike a fuel injection=
 system that demands a consistent pressure, all you need with SUs is enough=
 to keep up with demand and not so much that it overcomes the effect of the=
 floats.</div><div><br></div><div>In my experience there is a pretty big ra=
nge (possibly as high as 4 psi) that works.</div></div><div class=3D"gmail_=
extra"><br><div class=3D"gmail_quote">On Sun, Sep 9, 2018 at 5:33 AM, Lawre=
nce Schwartz <span dir=3D"ltr">&lt;<a href=3D"mailto:[email-masked]" target=
=3D"_blank">[email-masked]</a>&gt;</span> wrote:<br><blockquote class=3D"gma=
il_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-lef=
t:1ex">List, With reference to the TR3 mechanical fuel pump has anyone have=
 or had problems when replacing the mechanical fuel pump with the PSI? I be=
lieve the standard mechanical fuel pumps puts out 3.5 of PSI. Correct and a=
dvise if i am correct/wrong. Thanks in advance. Larry Schwartz <br>
<br>
Sent from my iPhone<br>
** <a href=3D"mailto:[email-masked]" target=3D"_blank">triumphs@au=
tox.team.net</a> **<br>
<br>
et=3D"_blank">http://www.team.net/donate.htm<wbr>l</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
er" target=3D"_blank">http://www.team.net/pipermail/<wbr>triumphs</a>=C2=A0=
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k">http://www.team.net/archive</a><br>
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hs/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.=
team.net/mailman/<wbr>options/triumphs/ahwahneetr@gm<wbr>ail.com</a><br>
</blockquote></div><br></div>
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a> **<br>
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<br></blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div cla=
ss=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr">=
<div><div dir=3D"ltr"><div>bruce adornato<br><br></div></div></div></div></=
div>
</div>

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From: "Randall" <[email-masked]>
Date: Mon, 10 Sep 2018 14:57:49 -0400

I've heard from people that got fuel pumps that put out more than their
rated pressure.  It's set by the 'return' spring inside the pump, so all it
takes is someone picking up the wrong spring when building the pump.
Installing the spring wrong can do it too.

TR4 workshop manual I believe gives 2 psi (+/- 0.5 psi) for H6 carbs

-- Randall