AFM Sensor Transfer Function
#2
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Join Date: Jun 2011
Location: Detroit Burbs
Posts: 299
Total Cats: 3
Well, I nicked an AFM transfer function from the AEM miata calibration.
g/s Volts
99.609375 0
99.609375 0.16
99.609375 0.31
91.796875 0.47
78.515625 0.62
62.5 0.78
30.078125 0.94
22.265625 1.09
18.75 1.25
17.1875 1.4
15.234375 1.56
13.28125 1.72
11.71875 1.87
10.546875 2.03
9.765625 2.18
8.59375 2.34
7.421875 2.5
5.078125 2.65
3.125 2.81
0 2.96
I plugged this in to my standalone controller (PROEFI-ish), and it sucks. The airmeter reads about double the airflow of the speed density calculation at idle. It gets even further off at high flow.
Can anyone verify if the above transfer function should be correct?
g/s Volts
99.609375 0
99.609375 0.16
99.609375 0.31
91.796875 0.47
78.515625 0.62
62.5 0.78
30.078125 0.94
22.265625 1.09
18.75 1.25
17.1875 1.4
15.234375 1.56
13.28125 1.72
11.71875 1.87
10.546875 2.03
9.765625 2.18
8.59375 2.34
7.421875 2.5
5.078125 2.65
3.125 2.81
0 2.96
I plugged this in to my standalone controller (PROEFI-ish), and it sucks. The airmeter reads about double the airflow of the speed density calculation at idle. It gets even further off at high flow.
Can anyone verify if the above transfer function should be correct?
Last edited by Frank_and_Beans; 11-08-2011 at 10:35 PM. Reason: Lined up the table better
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