Last job is to balance the carbs, and I can't seem to get it right

[Disorderlypunk]

ok this is getting out of hand very quickly


so setting them all at the same zero would work in a perfect world and most of the time could work
HOWEVER
due to how these sort of things work they need calibrated in use as they have moving parts and springs and all other things that may not be exactly the same as each other and will show a different reading anywhere other than 1 bar


another way to explain  calbration is  2 torque wrench's sitting on a table, one calibrated, one way out
you have no way to know which is which untill you put them under force on a test rig
ok we dont have a test rig for vacuum BUT WE DO we have four different ones of them
each cylinder is its own test rig giving the same vacuum all the time (ish)