<HTML><FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Same thing is noticed on the TN carb<BR>
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MattK<BR>
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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:<B>Re: Idle </B><BR>
Date:6/22/2004 8:27:18 AM Eastern Daylight Time<BR>
From:<A HREF="mailto:b4598070@yahoo.com">b4598070@yahoo.com</A><BR>
Reply-to:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
To:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
<I>Sent from the Internet </I><BR>
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The Webra carb is steel barreled with aluminum case.<BR>
On the ground before takeoff it always comes back to<BR>
idle. If the bottom end is lean after the flight it<BR>
will be spooled up a bit, when the bottom end is<BR>
slightly rich it seems to behave pretty good. This<BR>
is the MC carb.<BR>
<BR>
<BR>
--- Nat Penton <natpenton@centurytel.net> wrote:<BR>
> George the increased idle speed is not a result of a<BR>
> fuel supply condition. You can land two minutes<BR>
> after takeoff and still have the problem. It results<BR>
> because the pressure drop in the carb cools the<BR>
> barrell more than the case. This results in a poor<BR>
> seal and the carb looses some ability to controll<BR>
> the airflow. The barrell and the case operate at sub<BR>
> ambient and the barrell is somewhat insulated by the<BR>
> oil film creating greater differential temps. <BR>
> Insulating the case might keep the differential<BR>
> temps lower. Also a steel barrell / alum case might<BR>
> prove beneficial. I'm running the Perry carb and<BR>
> getting improved performance in the above regard.I<BR>
> think once this problem is solved we can get<BR>
> appreciable braking from the two stroke.<BR>
> Collectively we can find a solution and/also prevail<BR>
> on the manufactures. Nat Penton</BLOCKQUOTE><BR>
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