How does a 2x4 carburetor set-up function when progressive carb linkage is used?I'm understanding that the engine runs on the primaries of the rear carburetor then based upon throttle plate position of that primary carburetor and the connecting linkage adjustment, the primaries on the second carburetor begin to open.  Like a 3x2 progressive set-up, the primary throttle plates on both 4 barrel carburetors reach full open position in unison.
1) When can the secondary throttle plates of each carburetor begin to open?  Not until both carburetors are at the same primary throttle plate position so that both carbs have the same vacuum signal to activate the secondaries?2) Opinions?  For street use, does a 2x4 set-up with progressive throttle linkage provide more mannerly low speed stop-and-go operation or improved low speed throttle response?

Replies appreciated. 


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York