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Understanding Compressor MapsCompressor Map

The compressor map is a graph that describes a particular compressor’s performance characteristics, including efficiency, mass flow range, boost pressure capability, and turbo speed. Shown below is a figure that identifies aspects of a typical compressor map.

Parts of the Compressor Map

Plotting Your Data on the Compressor Map

Here we show methods for calculating mass flow rate and boost pressure required to meet a horsepower target. This data will then be used to choose the appropriate compressor and turbocharger. Having a horsepower target in mind is a vital part of the process. In addition to being necessary for calculating mass flow and boost pressure, a horsepower target is required for choosing the right fuel injectors, fuel pump and regulator, and other engine components.

 
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