How would you alter the pressure output? Surely its proportional to the flow.
For instance, it would be running maximum pressure until a certain threshold where flow demand is more and the pressure of the pump is less to accomodate this, if ive got it right in my head.
It basically lessens the strain on the HP pump as its not 'drawing' fuel at high rpms and is being fed it, so can focus on its sole purpose of pressuring the fuel instead of drawing & pressurising it.
For instance, it would be running maximum pressure until a certain threshold where flow demand is more and the pressure of the pump is less to accomodate this, if ive got it right in my head.
It basically lessens the strain on the HP pump as its not 'drawing' fuel at high rpms and is being fed it, so can focus on its sole purpose of pressuring the fuel instead of drawing & pressurising it.