for instance it wouldn't be hard to measure the output from all 4 delivery valves, but if they were different what would you do?
enough boost is when you have 3 dimple marks in the hood from the valve cover nuts..
It's amazing how useful the the search function is.
I've never asked, but when you read different performance fuel pump ratings, they usually list how many cc's of fuel the pump pushes. That must be straight from the pump, unless there is a specific calibrated test injector. Different injectors obviously flow different amounts of fuel so that wouldn't really tell you pump capability.