....slightly different characteristics, but that isn’t the reason for carb syncing.............linkage to all six carbs open the butterflies to the same flow rate across the full range of the linkage from idle to WOT.
Flow characteristics! So do intake tracks.
That is why I sync carbs, for equalized cylinder power pulses.
Next time you sync your carbs, leave the gauges on and raise the RPM to several different RPMs and see if they maintain "the same flow rate" or maintain truly equal vaccum on every cylinder.
If they do, you have a benchmark set of carbs, intakes and cylinders, be thankful.
Sync-ing at idle is a compromise that works well for most, if the variations across the RPM range are small as they usually are.
The act of sync-ing may or may not cause the throttle plates to be set mechanically to the same point of open(equal). It does not matter since you are equalizing flow by measuring vaccum not actual throttle opening. (There have been some carbs that did sync mechanically using a mark on the slides.)
