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Re: [Fot] SU HS6 problems during hard braking

To: fot@autox.team.net
Subject: Re: [Fot] SU HS6 problems during hard braking
From: Bill Dentinger via Fot <fot@autox.team.net>
Date: Sun, 14 Jul 2019 04:49:56 +0000 (UTC)
Cc: fot@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <543924610.1580026.1563079796724.ref@mail.yahoo.com> CPU iPhone OS 12_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 AolApp/5.7.5.0
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Years ago we went through a period where an additive in racing=C2=A0gas was=
 causing a leak in the float seams on new replacement floats. =C2=A0At the =
end of a session your =E2=80=98new=E2=80=99=C2=A0floats could be full of ga=
s. Old floats were sought after. =C2=A0Harold Baker, one of Duck Waddle=E2=
=80=99s crew made us some custom=C2=A0aluminum ones that worked perfect.=C2=
=A0 We got through the season. =C2=A0=C2=A0And eventually they fixed the is=
sue. Bill Dentinger

Sent from AOL Mobile Mail
 On=C2=A0Saturday, July 13, 2019,=C2=A0Steven Belfer via Fot=C2=A0<fot@auto=
x.team.net>=C2=A0wrote:

Probably not related but the brass floats can develop a pinhole leak. It pr=
obably sinks and stays on the bottom=C2=A0

~Steve

On Jul 13, 2019, at 8:09 PM, Tony Drews via Fot <fot@autox.team.net> wrote:


=20

We experienced this, but getting the pivots in the orientation you have the=
m was the fix for us (in a TR-4).=C2=A0 You can try a different top orienta=
tion though, assuming you have the float bowls with the 3 screws.=C2=A0 The=
 front carb is likely the problem - under braking the fuel goes to the fron=
t so the float drops.=C2=A0 As soon as you stop braking the float bowl is o=
verfull.
=20
Regards, Tony
=20
 On 7/13/2019 8:37 PM, Jason Sukey via Fot wrote:
 =20
=20
The floats pivot so the swing front to back.=C2=A0 =C2=A0On the rear carb t=
he pivot pin is nearest the firewall, on the front carb the pivot pin is ne=
arest the radiator.=20
  Thanks, Jason =20
  On Sat, Jul 13, 2019, 9:29 PM Greg Blake <gblake58tr3@icloud.com> wrote:
 =20
 What is the orientation of the pivot on the floats? =C2=A0
=20
 Sent from my iPhone=20
 On Jul 13, 2019, at 8:17 PM, Jason Sukey via Fot <fot@autox.team.net> wrot=
e:
=20
 =20
  Phil, I'm running 2 psi.=C2=A0 My fuel pressure gauge stays consistent du=
ring the entire run.=20
  Thanks, Jason =20
  On Sat, Jul 13, 2019, 9:15 PM Phil Gott <vfracing@aol.com> wrote:
 =20
Jason;
 What sort of Fuel pressure are you running? Should be 1 1/2 to 3 psi, alth=
ough a Spitfire driver and I run 6 with no apparent ill effect. More than t=
hat could be causing you some of this problem.
 Phil Gott
=20
 Sent from my iPhone
=20
 > On Jul 13, 2019, at 8:57 PM, Jason Sukey via Fot <fot@autox.team.net> wr=
ote:
 >=20
 > Hello FOT,
 >=C2=A0 =C2=A0 =C2=A0 Running my GT6 at the PVGP historics this weekend.=
=C2=A0 I've sorted the braking system and installed new tires since the las=
t time out.=C2=A0 Now that I'm actually able to brake hard, I'm suffering f=
rom what seems to be fuel flooding, possible sloshing in the float bowls an=
d dumping out the jet into the intake...
 >=20
 > During and immediately after a hard braking zone, the engine goes comple=
tely "off" and I can smell raw fuel.=C2=A0 After a few seconds it clears ou=
t and runs strong in all other conditions, no indication of over rich or st=
arving for fuel. Starts  normally, no issues idling.
 >=20
 > Original fuel level in the floats was about 1/8" below the top of the je=
t.=C2=A0 By reducing the fuel level in the bowls from there, the problem ha=
s somewhat improved, but it's still significant.=C2=A0 Every session I adju=
st them a little further, but I'm not sure this is the right fix...maybe a =
band aid.
 >=20
 > Has anyone experienced this with the HS carbs?=C2=A0=20
 >=20
 > Jason Sukey
 >=20
 >=20
 > _______________________________________________
 > fot@autox.team.net
 >=20
 > http://www.fot-racing.com
 >=20
 > Donate: http://www.team.net/donate.html
 > Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
 > Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/vfracing@a=
ol.com
 >=20
 >=20
=20
=20
  =20
=20
 _______________________________________________
 fot@autox.team.net
=20
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=20
 Donate: http://www.team.net/donate.html
 Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
 Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/gblake58tr3@=
icloud.com
=20
=20
 =20
 =20
 =20
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=20
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------=_Part_1580025_1577466598.1563079796721
Content-Transfer-Encoding: quoted-printable

Years ago we went through a period where an additive in racing&nbsp;gas was=
 causing a leak in the float seams on new replacement floats. &nbsp;At the =
end of a session your =E2=80=98new=E2=80=99&nbsp;floats could be full of ga=
s. Old floats were sought after. &nbsp;Harold Baker, one of Duck Waddle=E2=
=80=99s crew made us some custom&nbsp;aluminum ones that worked perfect.&nb=
sp; We got through the season. &nbsp;&nbsp;And eventually they fixed the is=
sue. Bill Dentinger<br><br><div id=3D"__aol_mail_signature__">Sent from AOL=
 Mobile Mail</div>

<br><div class=3D"aolmail_replyHeader">
    On&nbsp;Saturday, July 13, 2019,&nbsp;Steven Belfer via Fot&nbsp;&lt;fo=
t@autox.team.net&gt;&nbsp;wrote:
</div><br>
<blockquote style=3D"margin:0 0 0 9px;padding:0 0 0 9px;"><div id=3D"yiv615=
5603779"><div>Probably not related but the brass floats can develop a pinho=
le leak. It probably sinks and stays on the bottom&nbsp;<br clear=3D"none">=
<br clear=3D"none"><div dir=3D"ltr" id=3D"yiv6155603779AppleMailSignature">=
~Steve<div><br clear=3D"none"></div></div><div dir=3D"ltr"><div class=3D"yi=
v6155603779yqt5272048001" id=3D"yiv6155603779yqtfd61662"><br clear=3D"none"=
>On Jul 13, 2019, at 8:09 PM, Tony Drews via Fot &lt;<a rel=3D"nofollow" sh=
ape=3D"rect" ymailto=3D"mailto:fot@autox.team.net"; target=3D"_blank" href=
=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a>&gt; wrote:<br clear=
=3D"none"><br clear=3D"none"></div></div><div class=3D"yiv6155603779yqt5272=
048001" id=3D"yiv6155603779yqtfd99121"><blockquote type=3D"cite"><div dir=
=3D"ltr">
 =20
    </div></blockquote></div></div><div class=3D"yiv6155603779yqt5272048001=
" id=3D"yiv6155603779yqtfd76565"><div><p>We experienced this, but getting t=
he pivots in the orientation
      you have them was the fix for us (in a TR-4).&nbsp; You can try a
      different top orientation though, assuming you have the float
      bowls with the 3 screws.&nbsp; The front carb is likely the problem -
      under braking the fuel goes to the front so the float drops.&nbsp; As
      soon as you stop braking the float bowl is overfull.</p>
    <p>Regards, Tony<br clear=3D"none">
    </p>
    <div class=3D"yiv6155603779moz-cite-prefix">On 7/13/2019 8:37 PM, Jason=
 Sukey via
      Fot wrote:<br clear=3D"none">
    </div>
    <blockquote type=3D"cite">
      </blockquote></div></div><div><div class=3D"yiv6155603779yqt527204800=
1" id=3D"yiv6155603779yqtfd28686"><div>The floats pivot so the swing front =
to back.&nbsp; &nbsp;On
        the rear carb the pivot pin is nearest the firewall, on the
        front carb the pivot pin is nearest the radiator.
        <div><br clear=3D"none">
        </div>
        <div>Thanks,</div>
        <div>Jason</div>
      </div>
      <br clear=3D"none">
      <div class=3D"yiv6155603779gmail_quote">
        <div class=3D"yiv6155603779gmail_attr" dir=3D"ltr">On Sat, Jul 13, =
2019, 9:29 PM
          Greg Blake &lt;<a rel=3D"nofollow" shape=3D"rect" ymailto=3D"mail=
to:gblake58tr3@icloud.com" target=3D"_blank" href=3D"mailto:gblake58tr3@icl=
oud.com">gblake58tr3@icloud.com</a>&gt; wrote:<br clear=3D"none">
        </div>
        <blockquote class=3D"yiv6155603779gmail_quote" style=3D"margin:0 0 =
0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
          <div>What is the orientation of the pivot on the
            floats? &nbsp;<br clear=3D"none">
            <br clear=3D"none">
            <div dir=3D"ltr" id=3D"yiv6155603779m_-3378539813793621208Apple=
MailSignature">Sent
              from my iPhone</div>
            <div dir=3D"ltr"><br clear=3D"none">
              On Jul 13, 2019, at 8:17 PM, Jason Sukey via Fot &lt;<a rel=
=3D"nofollow" shape=3D"rect" ymailto=3D"mailto:fot@autox.team.net"; target=
=3D"_blank" href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a>&gt;
              wrote:<br clear=3D"none">
              <br clear=3D"none">
            </div>
            <blockquote type=3D"cite">
              <div dir=3D"ltr">
                <div>Phil, I'm running 2 psi.&nbsp; My fuel
                  pressure gauge stays consistent during the entire run.
                  <div><br clear=3D"none">
                  </div>
                  <div>Thanks,</div>
                  <div>Jason</div>
                </div>
                <br clear=3D"none">
                <div class=3D"yiv6155603779gmail_quote">
                  <div class=3D"yiv6155603779gmail_attr" dir=3D"ltr">On Sat=
, Jul 13,
                    2019, 9:15 PM Phil Gott &lt;<a rel=3D"nofollow" shape=
=3D"rect" ymailto=3D"mailto:vfracing@aol.com"; target=3D"_blank" href=3D"mai=
lto:vfracing@aol.com">vfracing@aol.com</a>&gt;
                    wrote:<br clear=3D"none">
                  </div>
                  <blockquote class=3D"yiv6155603779gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Jason;<br cl=
ear=3D"none">
                    What sort of Fuel pressure are you running? Should
                    be 1 1/2 to 3 psi, although a Spitfire driver and I
                    run 6 with no apparent ill effect. More than that
                    could be causing you some of this problem.<br clear=3D"=
none">
                    Phil Gott<br clear=3D"none">
                    <br clear=3D"none">
                    Sent from my iPhone<br clear=3D"none">
                    <br clear=3D"none">
                    &gt; On Jul 13, 2019, at 8:57 PM, Jason Sukey via
                    Fot &lt;<a rel=3D"nofollow" shape=3D"rect" ymailto=3D"m=
ailto:fot@autox.team.net" target=3D"_blank" href=3D"mailto:fot@autox.team.n=
et">fot@autox.team.net</a>&gt;
                    wrote:<br clear=3D"none">
                    &gt; <br clear=3D"none">
                    &gt; Hello FOT,<br clear=3D"none">
                    &gt;&nbsp; &nbsp; &nbsp; Running my GT6 at the PVGP his=
torics this
                    weekend.&nbsp; I've sorted the braking system and
                    installed new tires since the last time out.&nbsp; Now
                    that I'm actually able to brake hard, I'm suffering
                    from what seems to be fuel flooding, possible
                    sloshing in the float bowls and dumping out the jet
                    into the intake...<br clear=3D"none">
                    &gt; <br clear=3D"none">
                    &gt; During and immediately after a hard braking
                    zone, the engine goes completely "off" and I can
                    smell raw fuel.&nbsp; After a few seconds it clears out
                    and runs strong in all other conditions, no
                    indication of over rich or starving for fuel. Starts
                    normally, no issues idling.<br clear=3D"none">
                    &gt; <br clear=3D"none">
                    &gt; Original fuel level in the floats was about
                    1/8" below the top of the jet.&nbsp; By reducing the fu=
el
                    level in the bowls from there, the problem has
                    somewhat improved, but it's still significant.&nbsp;
                    Every session I adjust them a little further, but
                    I'm not sure this is the right fix...maybe a band
                    aid.<br clear=3D"none">
                    &gt; <br clear=3D"none">
                    &gt; Has anyone experienced this with the HS carbs?&nbs=
p;
                    <br clear=3D"none">
                    &gt; <br clear=3D"none">
                    &gt; Jason Sukey<br clear=3D"none">
                    &gt; <br clear=3D"none">
                    &gt; <br clear=3D"none">
                    &gt; _______________________________________________<br=
 clear=3D"none">
                    &gt; <a rel=3D"nofollow" shape=3D"rect" ymailto=3D"mail=
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                  </blockquote>
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</pre>
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