The 2.8 RsR was the only racing pump with a good fuel curve at least from peak torque to max RPM
It is hell trying to make a good fuel curve from initial load 2,000+ all the way up with the counter weights working against you all the way.
Some people have gone to great lengths to cure this problem.
Electromechanical injection pump - MFI2ECI - VGS-Motorsport: Weber Carbs - BOSCH Motorsport - ECU