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The Triumph pump is delivering oil for even less than half the time, because of ports in the pump bore.The piston and spring of the pressure relief valve even out the pulses.I can only guess, but diverting more oil to the big ends and making the rocker oil feed less sensitive to precise metering might have been reasons for changing to the "normal" dribble feed from the scavenge.Also, a thin steel pipe carrying hot oil at 60psi up the front of the engine and thence to a tank-top pressure gauge was an unnecessary opportunity for a breakdown.
The Triumph pump is delivering oil for even less than half the time, because of ports in the pump bore.
The piston and spring of the pressure relief valve even out the pulses.
I can only guess, but diverting more oil to the big ends and making the rocker oil feed less sensitive to precise metering might have been reasons for changing to the "normal" dribble feed from the scavenge.
Also, a thin steel pipe carrying hot oil at 60psi up the front of the engine and thence to a tank-top pressure gauge was an unnecessary opportunity for a breakdown.
