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Home > AFM's

Airflow meters

How they work
Air is measured using a sensor and this value is converted to a voltage which the ECU see's. For example 4 volts is the measured at idol and 12v measured at full thottle (im not sure what the actual values are). Engines are tuned by using both the airflow meter and engine RPM.

Rule of thumb for Air Flow meters maximum power they can messure

  RWKW RWKW outside diameter
Number of AFMS 1 2  
RB26 149 299 65mm
RB20/RB25 226 453 80mm
Z32 255 511 80mm
Q45 302 605 90mm

Airflow-meters alow more presice tuning but you can still tune your engine when exeeding flow limits by using the RPM scale. For example you could use a single Z32 AFM for a engine producing over 300rwkw

 

 












 

 

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