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<DIV>The action of converting liquid fuel to a vapor in the venturi is a part of
the refrigeration cycle. It requires energy to do it, which comes from several
sources. The most important source is the lower than ambient pressure as the
piston drives to compression, but ambient air and crankcase heat contribute
also, once the engine has reached steady state. Insulating the carb body places
different demands on these sources of vaporising energy. </DIV>
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<DIV>Potentially, it may reduce air temp further which may have a supecharging
effect. I think you are after improved sealing between the carb body and the
throttle barrel, but this could be an added benefit.</DIV>
<DIV> </DIV>
<DIV>Interesting idea Nat</DIV>
<DIV> </DIV>
<DIV>Matt</DIV>
<DIV>In a message dated 2/28/2005 9:02:14 PM Eastern Standard Time,
natpenton@centurytel.net writes:</DIV>
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<DIV><FONT face=Arial size=2>The carb is a potent refrigerator. Most carb case
heating comes from ambient air, not from engine case conductance. The engine
crankcase though, should be well ventilated. The
situation may be better with a plastic bushing for mounting the carb to
engine case, although I have not done so. Nat</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mailto:d.pappas@kodeos.com href="mailto:d.pappas@kodeos.com">Dean
Pappas</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, February 28, 2005 1:49
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Two Stk</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=171484719-28022005><FONT face=Arial color=#0000ff
size=2>Did you turn down the carburettor boss to make a gap that's filled
with vinyl?</FONT></SPAN></DIV>
<DIV><SPAN class=171484719-28022005><FONT face=Arial color=#0000ff size=2>If
not, then it's an awfully thin bit of insulation that provided the desired
effect.</FONT></SPAN></DIV>
<DIV><SPAN class=171484719-28022005><FONT face=Arial color=#0000ff
size=2>later,</FONT></SPAN></DIV>
<DIV><SPAN class=171484719-28022005> <FONT face=Arial
color=#0000ff size=2>Dean</FONT></SPAN></DIV>
<DIV> </DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT>
</P></BLOCKQUOTE></FONT></BLOCKQUOTE></DIV>
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