Mark and all,

The information that I previously gave on the '86 OMP delivery is in error.  After further analysis of the disassembled OMP, I realized that the delivery rate for the front two ports depends on the DIFFERENCE between the diameters of the two sections of the pump piston.  The result is that all four of the ports deliver the same flow rate.  This would make the application of this OMP to a three rotor engine more difficult, in my opinion.  Of course I could be wrong about that, too.

I apologize for the mistake.

Steve