Originally Posted by
vertical grimmace
Just an FYI, if you did not know, the 2 clunk system is known as Uniflow venting. Common with control line models. You want one clunk attached to your carb line, and the other clunk connected toy your muffler pressure line. Not your fuel dot. This helps maintain a consistent needle setting throughout the tank level. Typical problem is to go lean as fuel level drops. This eliminates this issue.
The tank will still have pressure whether the pressure line has a clunk or not, so why would this set be any different than a pressure line with no clunk? I can't see how it will stop the engine going lean as the level drops? With a clunk it will aerate/foam the fuel?
Just trying to understand how it works.