P4
P3
P2
P1
P0
ROTARY SWITCH
Calibration screw position settings
The calibration will not be changed until the rotary switch reaches the middle of the new
position.
AEM Lambda Gauge Owners
Because the Lambda gauge faceplate is calibrated for (
λ
) and all other calibration
positions are for AFR (Gasoline), AEM does not recommended changing the controller
calibration, as instructed above.
Below is the multiplier for calculating the Air Fuel Ratio (AFR) of common fuels from the
Lambda value.
Gasoline AFR
=
Lambda x 14.65
Methanol AFR
=
Lambda x 6.47
Propane AFR
=
Lambda x 15.7
Ethanol AFR
=
Lambda x 9.00
CNG AFR
=
Lambda x 14.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Analog Voltage (V)
A
ir
/Fu
e
l G
a
s
o
li
n
e
(A
FR
)
0.75
0.80
0.85
0.90
0.95
1.00
1.05
1.10
La
m
b
d
a
(
λ
)
AFR Small Volt Range (P2)
AFR Autronic Emulation (P3)
AFR Nernst Emulation (P4)
AEM GAUGE Default (P0 & P1)
Calibration graph of available outputs
