TK-421
New member
For some who want to learn how the Cobb system works, here is a reference chart to explain the conversion between Lambda and AFR values. Programs like ECUFlash use AFR values to adjust fuel trims, while Cobb uses a Lambda Value. When looking at the two side by side, it's outrageously confusing.
So I've devised this Chart to help you out in figuring out your Lambda Value from a AFR Value.
Lambda to AFR:
Lambda x 14.7
AFR. Lambda
17.64 1.20
17.49 1.19
17.35 1.18
17.20 1.17
17.05 1.16
16.91 1.15
16.76 1.14
16.61 1.13
16.46 1.12
16.32 1.11
16.17 1.10
16.02 1.09
15.88 1.08
15.73 1.07
15.58 1.06
15.44 1.05
15.29 1.04
15.14 1.03
14.99 1.02
14.85 1.01
14.70 1.00
14.55 0.99
14.41 0.98
14.26 0.97
14.11 0.96
13.97 0.95
13.82 0.94
13.67 0.93
13.52 0.92
13.38 0.91
13.23 0.90
13.08 0.89
12.94 0.88
12.79 0.87
12.64 0.86
12.50 0.85
12.35 0.84
12.20 0.83
12.05 0.82
11.91 0.81
11.76 0.80
11.61 0.79
11.47 0.78
11.32 0.77
11.17 0.76
11.03 0.75
10.88 0.74
10.73 0.73
10.58 0.72
10.44 0.71
10.29 0.70
10.14 0.69
10.00 0.68
So I've devised this Chart to help you out in figuring out your Lambda Value from a AFR Value.
Lambda to AFR:
Lambda x 14.7
AFR. Lambda
17.64 1.20
17.49 1.19
17.35 1.18
17.20 1.17
17.05 1.16
16.91 1.15
16.76 1.14
16.61 1.13
16.46 1.12
16.32 1.11
16.17 1.10
16.02 1.09
15.88 1.08
15.73 1.07
15.58 1.06
15.44 1.05
15.29 1.04
15.14 1.03
14.99 1.02
14.85 1.01
14.70 1.00
14.55 0.99
14.41 0.98
14.26 0.97
14.11 0.96
13.97 0.95
13.82 0.94
13.67 0.93
13.52 0.92
13.38 0.91
13.23 0.90
13.08 0.89
12.94 0.88
12.79 0.87
12.64 0.86
12.50 0.85
12.35 0.84
12.20 0.83
12.05 0.82
11.91 0.81
11.76 0.80
11.61 0.79
11.47 0.78
11.32 0.77
11.17 0.76
11.03 0.75
10.88 0.74
10.73 0.73
10.58 0.72
10.44 0.71
10.29 0.70
10.14 0.69
10.00 0.68
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