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A phenolic spacer would help keep the heat transfer down and give a
stronger shot of fuel for performance.
On Fri, Sep 11, 2015 at 8:42 PM, Stu via Tigers <tigers@autox.team.net>
wrote:
> I've been doing some research, and found an interesting video:
>
> https://www.youtube.com/watch?v=d7AkcjnCTVU
>
> To summarize, this guy does a good experiment that proves that some
> components of normal gasoline boil at around 170F.
>
> Our engines are usually well above this, so when we stop it's safe to
> assume that the underhood temperatures spike, heating up our carbs, and
> everything else. So there could easily be some boiling in the carb bowl.
> And once the 170F components boil off, the temperature rises even more.
> When trying a hot restart, new fuel is introduced to the much hotter carb
> when the pump comes back on, perhaps there could be a few moments of
> additional, perhaps more violent boiling, blowing vapor and fuel out the
> vent.
>
> Last weekend I tried recreating the problem. Similar hot day, drove
> around the same loop, etc. Parked and waited 10 minutes, about the same
> time as before. I had cleaned the top of the carb, so it was obvious that
> nothing had come out when I opened the hood and looked But listening
> closely, I thought I could hear a faint sizzling sound from somewhere
> within the carb... I did not try a restart, since I hadn't seen this
> video at that point.
>
> Any opinions?
>
> Stu
>
> _______________________________________________
>
> tigers@autox.team.net
>
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>
>
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>
--089e013a029e29d8d6051f8bd907
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">A phenolic spacer would help=C2=A0keep the heat transfer d=
own and give a stronger shot of fuel for performance.</div><div class=3D"gm=
ail_extra"><br><div class=3D"gmail_quote">On Fri, Sep 11, 2015 at 8:42 PM, =
Stu via Tigers <span dir=3D"ltr"><<a href=3D"mailto:tigers@autox.team.ne=
t" target=3D"_blank">tigers@autox.team.net</a>></span> wrote:<br><blockq=
uote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_default" style=
=3D"font-size:small"><div class=3D"gmail_default" style=3D"color:rgb(0,0,0)=
;font-size:x-small">I've been doing some research, and found an interes=
ting video:</div><div class=3D"gmail_default" style=3D"color:rgb(0,0,0);fon=
t-size:x-small"><br></div><div class=3D"gmail_default" style=3D"color:rgb(0=
,0,0);font-size:14.4px"><font size=3D"1"><a href=3D"https://www.youtube.com=
/watch?v=3Dd7AkcjnCTVU" target=3D"_blank">https://www.youtube.com/watch?v=
=3Dd7AkcjnCTVU</a></font><br></div><div class=3D"gmail_default" style=3D"co=
lor:rgb(0,0,0);font-size:14.4px"><font size=3D"1"><br></font></div><div cla=
ss=3D"gmail_default" style=3D"color:rgb(0,0,0);font-size:14.4px"><font size=
=3D"1">To summarize, this guy does a good experiment that proves that some =
components of normal gasoline boil at around 170F.</font></div><div class=
=3D"gmail_default" style=3D"color:rgb(0,0,0);font-size:14.4px"><font size=
=3D"1"><br></font></div><div class=3D"gmail_default" style=3D"color:rgb(0,0=
,0);font-size:14.4px"><font size=3D"1">Our engines are usually well above t=
his, so when we stop it's safe to assume that the underhood temperature=
s spike, heating up our carbs, and everything else.=C2=A0 So there could ea=
sily be some boiling in the carb =C2=A0bowl.=C2=A0 And once the 170F compon=
ents boil off, =C2=A0the temperature rises even more.=C2=A0 When trying a h=
ot restart, new fuel is introduced to the much hotter carb when the pump co=
mes back on, perhaps there could be a few moments of additional, perhaps mo=
re violent boiling, blowing vapor and fuel out the vent.</font></div><div c=
lass=3D"gmail_default" style=3D"color:rgb(0,0,0);font-size:14.4px"><font si=
ze=3D"1"><br></font></div><div class=3D"gmail_default" style=3D"color:rgb(0=
,0,0);font-size:14.4px"><font size=3D"1">Last weekend I tried recreating th=
e problem.=C2=A0 Similar hot day, drove around the same loop, etc.=C2=A0 Pa=
rked and waited 10 minutes, about the same time as before.=C2=A0 I had clea=
ned the top of the carb, so it was obvious that nothing had come out when I=
opened the hood and looked =C2=A0But listening closely, I thought I could =
hear a faint sizzling sound from somewhere within the carb... =C2=A0 I did =
not try a restart, since I hadn't seen this video at that point.</font>=
</div><div class=3D"gmail_default" style=3D"color:rgb(0,0,0);font-size:14.4=
px"><font size=3D"1"><br></font></div><div class=3D"gmail_default" style=3D=
"color:rgb(0,0,0);font-size:14.4px"><font size=3D"1">Any opinions?</font></=
div><span class=3D"HOEnZb"><font color=3D"#888888"><div class=3D"gmail_defa=
ult" style=3D"color:rgb(0,0,0);font-size:14.4px"><font size=3D"1"><br></fon=
t></div><div class=3D"gmail_default" style=3D"color:rgb(0,0,0);font-size:14=
.4px"><font size=3D"1">Stu</font></div></font></span></div></div>
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<br></blockquote></div><br></div>
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