- ENGINE IS MADE TO RUN AT 100% LOAD AND THEN LOAD IS REDUCED SUDDENLY TO 75%. NO SURGING SHOULD BE OBSERVED FOR STABLE TURBOCHARGER.
- ENGINE IS MADE TO RUN AT 100% LOAD AND THEN LOAD IS REDUCED TO 50%. NO SURGING SHOULD BE OBSERVED FOR STABLE TURBOCHARGER. STABILITY ABOVE 50% LOAD IS GOOD.
ENGINE RUN AT PART LOAD WITH SCAVENGE PRESSURE=0.6 BAR , PULL FUEL PUMP RACK OF ONE CYLINDER TO 0 SUDDENLY. REPEAT WITH ALL CYLINDERS. IF SURGING IS NOT MORE THAN 1 UNIT THEN THE TURBOCHARGER IS STABLE.