diesel engine turbo charger suction filter

 CONSTANT PRESSURE TURBO SURGING:    

Advantage:
Exhaust piping are sample
*Higher turbine efficience
*Good performance at high load
Disadventage:
*Required auxiliary blower during maneuvering 
*Poor response to charge in load 
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SUCTION FILTER:
A vacuum gauge or u-tube gauge is fitted on the suction side of the blower .so thst the inlet air  pressure between the filter &blower can dirty 
its resistance to air flow increase & pressure drop 
across the filter  is increased.