<div>So I guess the thinking behind doing this is that you deliver the fuel to the carb and its there for the carb to take. But the fuel at the carb nipple will only be under atmospheric pressure (since the tanks vented), anything extra is free to go back to the tank. The venturi affect of the carb will draw the fuel into the carb. I dont see why you would need to go clear back to the tank, just loop around the pump. </div> <div> </div> <div>This sounds like it could take the variability of pumps out of the equation and at the same time let the pump deliver fuel to the carb, but not push fuel into the carb.</div> <div> </div> <div>Interesting.<BR><BR><B><I>Wayne Galligan <wgalligan@texasairnet.com></I></B> wrote:</div> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> <META content="MSHTML 6.00.2800.1528" name=GENERATOR> <STYLE></STYLE> <DIV><FONT face=Arial size=2>Vincent,</FONT></DIV> <DIV><FONT
face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I wonder if this "T" setup would work on an OS 1.40. I already use the check valve in the vent so a couple of "T's" and maybe I would be in business. Would you have to change the pump pressure?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Wayne Galligan</FONT></DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=vicenterc@comcast.net href="mailto:vicenterc@comcast.net">vicenterc@comcast.net</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B>
Sunday, March 05, 2006 8:19 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] Fuel Regulation in 2C Engines</DIV> <DIV><BR></DIV> <DIV> <DIV> <DIV>Good morning all,</DIV> <DIV> </DIV> <DIV>I have been using the OS 160, OS 140 RX and Mintor 140 with good results in the last 4-5 years. We have been comparing and discussing the advantages of YS compared with 2C. One of the main advantages of YS is that in transition when power down the engine goes instantly to 2000 RPM or less. The 2C engines always takes too much time to get down to idle and I believe that causes us (in pattern) some problems. </DIV> <DIV> </DIV> <DIV>I have been thinking that the problem is that the carburetor and or fuel system that can not regulate properly (pressure or flow). I think in these engines, the pumps are set to deliver fuel at full flow (or pressure) without any regulation system (like the YS). I had the
opportunity to discuss this issue with Perry Pump and they recommended to install a by-pass line. The idea is to send the excess fuel (pressure) back to the tank during transition. Perry Pump recommended to install the T as close as possible to the carburetor needle valve. Also in their web site they have an idea that he said is used for cars that is a by-pass line that loop around the pump (<A href="http://www.perrypumps.com/instructions.htm" target=_blank>http://www.perrypumps.com/instructions.htm</A>, Click on Pump and By-Pass Systems). I think the ideas deserve some checking since it is natural to have this type of regulation to maintain constant press! ure in the line before needle valve. I tried the other day the by-pass to the carburetor but I installed the T too far from the carburetor and forgot to open the vent in the tank. Of course the results were bad since I was developing vacuum in the tank. I will try
these options of by-pass lines as soon as get warmer. However, I think someone out there already tried to do this and know results so I am looking for feed back.</DIV> <DIV> </DIV> <DIV>Thanks in advance,</DIV> <DIV> </DIV> <DIV>Vicente Bortone</DIV> <DIV> </DIV></DIV></WMFILTERED></DIV> <div> <HR> <div></div>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</BLOCKQUOTE>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</BLOCKQUOTE><BR><p>
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