I have a 48IDA setup with the carbs oriented so the fuel inlets on the opposite banks are pointed away from each other. With this arrangement, the linkage provided has a single bar conntecting the passenger side carbs to the driver side carbs. The resulting linkage geometry appears to allow the drivers side carbs to open faster than the passenger side carbs during the idle transition phase, equal opening rates at half throttle, and slower rates near full throttle. Because of this geometry, I have had to set the linkage so that all carbs are pulling the same amount of air when the engine is running from 1700 to 2000 rpms in order to have a smooth engine response when changing from the idle/transition circuit to the main fuel/air circuit.
Is this a problem that has been experienced by others using a single bar linkage? Would the correct action be to install a center bellcrank to connect the two banks of carbs?
