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Old 01-16-2003 | 03:33 PM
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Kris^
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From: concord, NC
Default 3w-140 problem

Yup. . KISS as they say. . I'm designing in a "carb box" for my cowls now that establishes a "dead zone' around the carb to keep pressure fluctuations to a minimum and surrounds the entire thing. Since it's part of the cowl, you don't have to worry about something interfering the way you do with add-ons for the carb.

One other thing to consider, in the case of these engines puddling gas right above the reed valves, is that it takes inlet charge velocity to keep the fuel in suspension, and overly large reed valves drop that velocity by a very good margin at low rpm settings. Best design would be to inject gas only at the base of the cylinder ports, and move only air through the reeds, so that little or no dropout of fuel particles would be taking place. We are a long way from that, though.

BTW. . Welcome to RCU Don!!! Bring some of your friends along!!! I'm sure you guys have a ton of knowledge to share.