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
