Re: [Fot] SU HS6 problems during hard braking

[Steven Belfer via Fot <fot@autox.team.net>]

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Probably not related but the brass floats can develop a pinhole leak. It pro=
bably sinks and stays on the bottom=20

~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 th=
em was the fix for us (in a TR-4).  You can try a different top orientation t=
hough, assuming you have the float bowls with the 3 screws.  The front carb i=
s likely the problem - under braking the fuel goes to the front so the float=
 drops.  As soon as you stop braking the float bowl is overfull.
>=20
> Regards, Tony
>=20
>> On 7/13/2019 8:37 PM, Jason Sukey via Fot wrote:
>> The floats pivot so the swing front to back.   On the rear carb the pivot=
 pin is nearest the firewall, on the front carb the pivot pin is nearest the=
 radiator.
>>=20
>> Thanks,
>> Jason
>>=20
>>> On Sat, Jul 13, 2019, 9:29 PM Greg Blake <gblake58tr3@icloud.com> wrote:=

>>> What is the orientation of the pivot on the floats? =20
>>>=20
>>> Sent from my iPhone
>>>=20
>>> On Jul 13, 2019, at 8:17 PM, Jason Sukey via Fot <fot@autox.team.net> wr=
ote:
>>>=20
>>>> Phil, I'm running 2 psi.  My fuel pressure gauge stays consistent durin=
g the entire run.
>>>>=20
>>>> Thanks,
>>>> Jason
>>>>=20
>>>>> On Sat, Jul 13, 2019, 9:15 PM Phil Gott <vfracing@aol.com> wrote:
>>>>> Jason;
>>>>> What sort of Fuel pressure are you running? Should be 1 1/2 to 3 psi, a=
lthough a Spitfire driver and I run 6 with no apparent ill effect. More than=
 that 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=
> wrote:
>>>>> >=20
>>>>> > Hello FOT,
>>>>> >      Running my GT6 at the PVGP historics this weekend.  I've sorted=
 the braking system and installed new tires since the last time out.  Now th=
at 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...
>>>>> >=20
>>>>> > During and immediately after a hard braking zone, the engine goes co=
mpletely "off" and I can smell raw fuel.  After a few seconds it clears out a=
nd runs strong in all other conditions, no indication of over rich or starvi=
ng for fuel. Starts normally, no issues idling.
>>>>> >=20
>>>>> > Original fuel level in the floats was about 1/8" below the top of th=
e jet.  By reducing the fuel level in the bowls from there, the problem has s=
omewhat improved, but it's still significant.  Every session I adjust 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? =20
>>>>> >=20
>>>>> > Jason Sukey
>>>>> >=20
>>>>> >=20
>>>>> > _______________________________________________
>>>>> > fot@autox.team.net
>>>>> >=20
>>>>> > http://www.fot-racing.com
>>>>> >=20
>>>>> > Donate: http://www.team.net/donate.html
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/fot
>>>>> > Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/vfraci=
ng@aol.com
>>>>> >=20
>>>>> >=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/fo=
t
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r3@icloud.com
>>>>=20
>>>>=20
>>=20
>>=20
>> _______________________________________________
>> fot@autox.team.net
>>=20
>> http://www.fot-racing.com
>>=20
>> Donate: http://www.team.net/donate.html
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>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/tony@tonydr=
ews.com
>>=20
>>=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
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hcars.com
>=20
>=20

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<html><head><meta http-equiv="content-type" content="text/html; 
charset=utf-8"></head><body dir="auto">Probably not related but the brass 
floats can develop a pinhole leak. It probably sinks and stays on the 
bottom&nbsp;<br><br><div id="AppleMailSignature" 
dir="ltr">~Steve<div><br></div></div><div dir="ltr"><br>On Jul 13, 2019, at 
8:09 PM, Tony Drews via Fot &lt;<a 
href="mailto:fot@autox.team.net";>fot@autox.team.net</a>&gt; 
wrote:<br><br></div><blockquote type="cite"><div dir="ltr">
  
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  
  
    <p>We experienced this, but getting the 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>
    </p>
    <div class="moz-cite-prefix">On 7/13/2019 8:37 PM, Jason Sukey via
      Fot wrote:<br>
    </div>
    <blockquote type="cite" 
cite="mid:CAMmo4o_jpRJoTD-5=q-Mc692usJfsDjQtGBV9igraR-L6MtHCg@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="auto">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 dir="auto"><br>
        </div>
        <div dir="auto">Thanks,</div>
        <div dir="auto">Jason</div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Sat, Jul 13, 2019, 9:29 PM
          Greg Blake &lt;<a href="mailto:gblake58tr3@icloud.com"; 
moz-do-not-send="true">gblake58tr3@icloud.com</a>&gt; wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div dir="auto">What is the orientation of the pivot on the
            floats? &nbsp;<br>
            <br>
            <div id="m_-3378539813793621208AppleMailSignature" dir="ltr">Sent
              from my iPhone</div>
            <div dir="ltr"><br>
              On Jul 13, 2019, at 8:17 PM, Jason Sukey via Fot &lt;<a 
href="mailto:fot@autox.team.net"; target="_blank" rel="noreferrer" 
moz-do-not-send="true">fot@autox.team.net</a>&gt;
              wrote:<br>
              <br>
            </div>
            <blockquote type="cite">
              <div dir="ltr">
                <div dir="auto">Phil, I'm running 2 psi.&nbsp; My fuel
                  pressure gauge stays consistent during the entire run.
                  <div dir="auto"><br>
                  </div>
                  <div dir="auto">Thanks,</div>
                  <div dir="auto">Jason</div>
                </div>
                <br>
                <div class="gmail_quote">
                  <div dir="ltr" class="gmail_attr">On Sat, Jul 13,
                    2019, 9:15 PM Phil Gott &lt;<a 
href="mailto:vfracing@aol.com"; target="_blank" rel="noreferrer" 
moz-do-not-send="true">vfracing@aol.com</a>&gt;
                    wrote:<br>
                  </div>
                  <blockquote class="gmail_quote" style="margin:0 0 0
                    .8ex;border-left:1px #ccc solid;padding-left:1ex">Jason;<br>
                    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>
                    Phil Gott<br>
                    <br>
                    Sent from my iPhone<br>
                    <br>
                    &gt; On Jul 13, 2019, at 8:57 PM, Jason Sukey via
                    Fot &lt;<a href="mailto:fot@autox.team.net"; rel="noreferrer 
noreferrer" target="_blank" moz-do-not-send="true">fot@autox.team.net</a>&gt;
                    wrote:<br>
                    &gt; <br>
                    &gt; Hello FOT,<br>
                    &gt;&nbsp; &nbsp; &nbsp; Running my GT6 at the PVGP 
historics 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>
                    &gt; <br>
                    &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>
                    &gt; <br>
                    &gt; Original fuel level in the floats was about
                    1/8" below the top of the jet.&nbsp; By reducing the fuel
                    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>
                    &gt; <br>
                    &gt; Has anyone experienced this with the HS carbs?&nbsp;
                    <br>
                    &gt; <br>
                    &gt; Jason Sukey<br>
                    &gt; <br>
                    &gt; <br>
                    &gt; _______________________________________________<br>
                    &gt; <a href="mailto:fot@autox.team.net"; rel="noreferrer 
noreferrer" target="_blank" moz-do-not-send="true">fot@autox.team.net</a><br>
                    &gt; <br>
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moz-do-not-send="true">http://www.fot-racing.com</a><br>
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                    &gt; <br>
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                  </blockquote>
                </div>
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            </blockquote>
            <blockquote type="cite">
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