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Carburetor CFM Calculator






 

 

 

 


How This Is Calculated


$$ CFM = \frac{CID \cdot RPM \cdot VE}{3456} $$ where:

CFM   =   Cubic feet per minute   (cfm)

CID   =   Displacement in cubic inshes   (in³)

RPM   =   Maximum revolutions per minute   (RPM)

VE   =   Volumetric efficiency   (RPM)


Assumptions


  • Air-fuel mixture is ideal.
  • Volumetric efficiency remains constant.
  • The engine is four stroke.
  • Torque remains constant across RPM range.


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