The one place a larger fuel line wouild seem to help would be an increased surge capacity (capacitance?), especially when using a filter. Fuel flow would remain more consistant (rate and pressure) within the carburetor under a heavy G-load while accelerating the engine. The medium tubing should be able to supply fuel under constant flow situations, but an accelerating situation may be a different story. I used to lead the fuel line across the front of the engine before linking it to the carb nipple for this reason (before pumps or muffler pressure).
<br><br>This is, or course, completely theoretical. And probably not an issue for glow engines under 100cc.<br><br><div><span class="gmail_quote">On 5/20/06, <b class="gmail_sendername">Ron Lockhart</b> <<a href="mailto:ronlock@comcast.net">
ronlock@comcast.net</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>
<div style="font-size: 10pt; font-family: Arial; background-color: rgb(255, 255, 255);" bgcolor="#ffffff">
<div>I agree.</div>
<div>This also agrees with some very rough testing I did a few years ago.</div>
<div>There were rumors that larger line would make a SuperTigre 2300 run
better.</div>
<div>My rough tests showed medium line provided plenty of flow, and large line a
bit better.</div>
<div>Changing to the large line on the engine made no noticable difference
in practice.</div></div><div><span class="sg">
<div> </div>
<div>Ron Lockhart</div>
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