The volume downstream from the orifice (to the EC2 and the FP regulator) is
     > now a bit too large making the response too slow.  Its fine for the normal
     > slow power changes, but I noted that pulling the throttle rapidly back to
     > idle results in a dead spot while the mixture is too rich (MAP decaying too
     > slowly).  The response can be varied by varying the volume downstream from
     > the orifice, or changing the orifice diameter.  I intend to reduce the
     > volume I have in the line to the EC2.
     >
     > If you want to think about it, consider the volume in the line as a spring
     > (linear with force, more volume = weaker spring), and the restrictor as a
     > hydraulic damper (flow varying with about the cube root of the force; I
     > think; smaller diameter = more damping).  Best not to think about it too
     > hard, cuz it?s not that critical.
     >
     > Al

Al,
This is an interesting situation. The large displacement 2 stroke single cylinder
motorcycles all started using an accumulator bottle plumbed into the port
between the cylinder and carburator. The bottle was just a closed can about
2inches in diameter and 4 inches long. They used a 3/8 ths id line. The claim
was improved off idle and transitioning throttle performance. Food for thought.
Bill Jepson

 
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