Every Lubricating Oil pump made by us is tested on a testing rig 100% for oil delivery and pressure. The testing rig generates the same working condition for the pump as in the engine. Only the pressure and RPM for testing the pumps is more then 4 times then the actual engine requirement. This makes sure the pumps go through the most extreme working conditions which probably the engine might never actually face in its life term. However once these work properly on those harsh standards then they 100% OK for going on the engines for installation.
All Injector cups are tested for spray pattern. The spray pattern test ensure the spray angle of the fuel is in the correct straight line and hits precisely the target blocks on the fixture. This spray hit ensures the same correct hit of fuel spray on the piston crown during engine functioning.
The flow test is a testing rig where the injector cups hydraulic flow from the holes is measured at 2000 PSI. The hole size is used only as a reference to the past practice. The number of holes in the injector cup and the spray angle of these holes remain the same. The hole diameter can measure higher or lower than the older injector cups and still flow within the proper specifications.
This video explains who one of the most critical operations for the plunger & barrel where these precision class matched for clearance in a controlled temperature for giving the correct fuel injection flow and pressure in the injector.