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Sensor Scalings
Mass Air Flow Sensors
We decided to publish often used MAF sensor scalings. This will make fuel tuning even easier.
Please keep in mind that you have to apply the MAF hack to your firmware binary when exceeding 1024kgh.
BMW M54B30 MAF
This is the scale of the M54B30 OEM MAF sensor.
0.00 | 0.00 | 0.00 | 0.00 | 1.78 | 2.23 | 2.69 | 3.14 | 3.58 | 4.03 | 4.48 | 4.92 | 5.38 | 5.81 | 6.28 | 6.72 |
7.25 | 7.55 | 7.86 | 8.17 | 8.48 | 8.81 | 9.14 | 9.47 | 9.81 | 10.17 | 10.53 | 10.89 | 11.27 | 11.66 | 12.05 | 12.45 |
12.88 | 13.30 | 13.73 | 14.19 | 14.64 | 15.09 | 15.58 | 16.06 | 16.56 | 17.06 | 17.58 | 18.11 | 18.64 | 19.19 | 19.75 | 20.31 |
20.91 | 21.50 | 22.09 | 22.72 | 23.34 | 24.00 | 24.66 | 25.33 | 26.02 | 26.73 | 27.45 | 28.20 | 28.95 | 29.73 | 30.53 | 31.34 |
32.19 | 33.05 | 33.94 | 34.84 | 35.77 | 36.72 | 37.69 | 38.69 | 39.69 | 40.72 | 41.77 | 42.83 | 43.91 | 44.98 | 46.09 | 47.20 |
48.33 | 49.47 | 50.61 | 51.77 | 52.92 | 54.09 | 55.28 | 56.47 | 57.67 | 58.89 | 60.13 | 61.38 | 62.64 | 63.92 | 65.22 | 66.53 |
67.88 | 69.23 | 70.63 | 72.03 | 73.45 | 74.92 | 76.41 | 77.92 | 79.47 | 81.05 | 82.64 | 84.28 | 85.97 | 87.67 | 89.42 | 91.20 |
93.03 | 94.89 | 96.78 | 98.70 | 100.67 | 102.67 | 104.70 | 106.78 | 108.88 | 111.03 | 113.20 | 115.42 | 117.67 | 119.95 | 122.28 | 124.64 |
127.03 | 129.47 | 131.94 | 134.45 | 137.00 | 139.58 | 142.20 | 144.86 | 147.56 | 150.30 | 153.08 | 155.89 | 158.75 | 161.66 | 164.59 | 167.56 |
170.58 | 173.64 | 176.75 | 179.89 | 183.09 | 186.33 | 189.63 | 192.95 | 196.34 | 199.77 | 203.25 | 206.78 | 210.36 | 213.98 | 217.67 | 221.41 |
225.19 | 229.03 | 232.92 | 236.88 | 240.89 | 244.95 | 249.09 | 253.28 | 257.52 | 261.83 | 266.20 | 270.64 | 275.14 | 279.72 | 284.34 | 289.05 |
293.83 | 298.67 | 303.59 | 308.58 | 313.66 | 318.80 | 324.03 | 329.34 | 334.73 | 340.20 | 345.78 | 351.44 | 357.17 | 363.02 | 368.95 | 374.98 |
381.13 | 387.38 | 393.72 | 400.17 | 406.75 | 413.42 | 420.23 | 427.16 | 434.20 | 441.38 | 448.67 | 456.11 | 463.69 | 471.39 | 479.27 | 487.28 |
495.45 | 503.78 | 512.28 | 520.95 | 529.80 | 538.83 | 548.06 | 557.47 | 567.09 | 576.92 | 586.95 | 597.22 | 607.70 | 618.39 | 629.25 | 640.28 |
651.47 | 662.78 | 674.20 | 685.73 | 697.34 | 709.02 | 720.75 | 732.52 | 744.31 | 756.09 | 767.89 | 779.69 | 791.48 | 803.30 | 815.13 | 826.97 |
838.86 | 850.77 | 862.72 | 874.72 | 886.78 | 898.88 | 911.05 | 923.30 | 935.61 | 948.00 | 960.48 | 973.06 | 985.73 | 998.53 | 1011.42 | 1023.98 |
Audi S4 (B5) MAF
The Bosch 0280218038 MAF sensor is installed in Audi S4 B5 series. Sometimes you will also find it even cheaper under the replacement part number 078906461B.
The sensor itself is a slot-in type and comes premounted in a 73mm inner diameter tube. Matching connector can be found under VAG partnumber 1J0973775A.
0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
0.00 | 0.00 | 0.00 | 0.00 | 0.72 | 1.69 | 2.75 | 3.78 | 4.81 | 5.84 | 6.66 | 7.50 | 8.16 | 9.00 | 9.81 | 10.59 |
11.41 | 12.28 | 13.09 | 13.91 | 14.81 | 15.66 | 16.59 | 17.47 | 18.50 | 19.41 | 20.44 | 21.50 | 22.53 | 23.66 | 24.75 | 25.91 |
27.09 | 28.25 | 29.56 | 30.75 | 32.00 | 33.22 | 34.47 | 35.78 | 37.03 | 38.38 | 39.75 | 41.06 | 42.50 | 43.94 | 45.31 | 46.75 |
48.09 | 49.63 | 51.16 | 52.59 | 54.25 | 55.78 | 57.44 | 59.06 | 60.72 | 62.47 | 64.19 | 65.94 | 67.78 | 69.63 | 71.47 | 73.34 |
75.28 | 77.31 | 79.25 | 81.41 | 83.44 | 85.50 | 87.75 | 89.78 | 92.13 | 94.38 | 96.72 | 99.06 | 101.41 | 103.97 | 106.44 | 108.84 |
111.41 | 113.94 | 116.50 | 119.19 | 121.81 | 124.47 | 127.19 | 129.97 | 132.81 | 135.56 | 138.53 | 141.34 | 144.53 | 147.69 | 150.81 | 154.09 |
157.47 | 160.78 | 164.28 | 167.69 | 171.38 | 175.06 | 178.69 | 182.56 | 186.28 | 190.28 | 194.38 | 198.28 | 202.47 | 206.56 | 210.91 | 215.38 |
219.59 | 224.22 | 228.59 | 233.31 | 238.13 | 242.69 | 247.72 | 252.78 | 257.63 | 262.84 | 267.88 | 273.31 | 278.84 | 284.09 | 289.75 | 295.22 |
301.06 | 307.06 | 312.78 | 318.97 | 325.00 | 331.34 | 337.84 | 344.13 | 350.81 | 357.28 | 364.16 | 371.16 | 377.91 | 385.19 | 392.19 | 399.69 |
407.38 | 414.78 | 422.72 | 430.84 | 438.63 | 446.97 | 455.00 | 463.56 | 472.28 | 480.69 | 489.66 | 498.31 | 507.59 | 516.91 | 526.00 | 535.66 |
544.94 | 554.88 | 564.94 | 574.66 | 585.06 | 595.06 | 605.69 | 616.53 | 626.91 | 637.97 | 649.19 | 660.06 | 671.59 | 682.69 | 694.53 | 706.59 |
718.06 | 730.59 | 742.66 | 755.63 | 768.78 | 781.50 | 795.03 | 808.13 | 821.94 | 836.06 | 849.66 | 864.16 | 878.16 | 893.09 | 908.31 | 922.91 |
938.63 | 953.88 | 970.25 | 986.84 | 1002.97 | 1020.25 | 1037.75 | 1054.75 | 1072.97 | 1090.47 | 1109.41 | 1128.63 | 1147.22 | 1167.19 | 1186.44 | 1207.09 |
Audi RS4 (B5) MAF
The Bosch 0280218067 MAF sensor is one of the highest reading sensors used by OEMs. Sometimes you will also find it even cheaper under the replacement part number 0986280219.
The sensor itself is a slot-in type and comes premounted in a 83mm inner diameter tube. Matching connector can be found under VAG partnumber 1J0973775A.
0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
0.000 | 0.000 | 0.000 | 0.000 | 1.560 | 3.130 | 4.750 | 6.220 | 7.410 | 8.440 | 9.500 | 10.590 | 11.590 | 12.690 | 13.750 | 14.840 |
15.970 | 17.060 | 18.190 | 19.340 | 20.500 | 21.720 | 22.970 | 24.130 | 25.340 | 26.560 | 27.840 | 29.190 | 30.500 | 31.940 | 33.280 | 34.720 |
36.250 | 37.720 | 39.250 | 40.780 | 42.410 | 44.060 | 45.660 | 47.250 | 48.810 | 50.440 | 52.160 | 53.810 | 55.660 | 57.500 | 59.340 | 61.380 |
63.220 | 65.340 | 67.410 | 69.530 | 71.690 | 73.810 | 76.160 | 78.590 | 80.940 | 83.410 | 85.810 | 88.470 | 91.130 | 93.660 | 96.340 | 98.970 |
101.810 | 104.690 | 107.410 | 110.250 | 113.220 | 116.160 | 119.130 | 122.030 | 125.190 | 128.280 | 131.310 | 134.560 | 137.690 | 140.970 | 144.530 | 147.940 |
151.720 | 155.310 | 159.220 | 163.220 | 167.000 | 171.190 | 175.190 | 179.590 | 184.000 | 188.280 | 192.780 | 197.280 | 202.000 | 206.810 | 211.470 | 216.500 |
221.630 | 226.470 | 231.720 | 236.780 | 242.130 | 247.530 | 252.910 | 258.530 | 264.000 | 269.840 | 275.810 | 281.660 | 287.780 | 293.750 | 300.190 | 306.690 |
313.000 | 319.690 | 326.130 | 333.060 | 340.060 | 346.880 | 354.060 | 361.560 | 368.690 | 376.280 | 383.690 | 391.560 | 399.590 | 407.310 | 415.530 | 423.530 |
432.060 | 440.690 | 449.190 | 458.250 | 467.000 | 476.410 | 485.940 | 495.220 | 505.090 | 514.630 | 524.780 | 535.190 | 545.190 | 555.910 | 566.310 | 577.410 |
588.720 | 599.630 | 611.280 | 623.160 | 634.590 | 646.840 | 658.560 | 671.090 | 683.810 | 696.060 | 709.130 | 721.750 | 735.470 | 749.470 | 762.940 | 777.340 |
791.380 | 806.280 | 821.410 | 836.000 | 851.590 | 866.530 | 882.500 | 898.720 | 914.280 | 931.000 | 948.310 | 964.940 | 982.590 | 999.690 | 1017.970 | 1036.590 |
1054.530 | 1073.660 | 1092.000 | 1111.630 | 1131.840 | 1151.340 | 1172.220 | 1192.310 | 1213.880 | 1235.780 | 1256.940 | 1279.530 | 1301.380 | 1324.690 | 1348.340 | 1371.160 |
1395.530 | 1419.030 | 1444.090 | 1469.560 | 1494.060 | 1520.250 | 1546.750 | 1572.340 | 1599.560 | 1625.810 | 1653.660 | 1682.000 | 1709.250 | 1738.220 | 1766.130 | 1795.810 |
Oil / Fluid Temperature Sensors
Temperature Sensors
If you want to use different anolog sensors, it's important to know the ECUs internal electrical circuit diagram, since the sensor value differs when you calculate the sensor voltage with a wrong pull-up resistor.
The MS42/MS43s intake air temperature is measured over a voltage divider with a 2.49kOhm pull-up resistor and the oil temperature is measured over a voltage divider with a 828 Ohm pull-up resistor to the internal +5V supply.
BMW M50 IAT
V | °C |
---|---|
0.098 | 140.3 |
0.137 | 129.8 |
0.215 | 110.3 |
0.274 | 99.8 |
0.352 | 90.0 |
0.450 | 80.3 |
0.586 | 69.8 |
0.782 | 60.0 |
1.017 | 50.3 |
1.721 | 30.0 |
2.170 | 20.3 |
2.698 | 9.8 |
3.226 | 0.0 |
3.715 | -9.8 |
4.126 | -20.3 |
4.439 | -30.0 |
BMW M52TU / M54 IAT
V | °C |
---|---|
0.215 | 142.5 |
0.274 | 129.8 |
0.469 | 110.3 |
0.606 | 99.8 |
0.782 | 90.0 |
1.017 | 80.3 |
1.310 | 69.8 |
1.662 | 60.0 |
2.092 | 50.3 |
3.089 | 30.0 |
4.008 | 9.8 |
4.341 | 0.0 |
4.595 | -9.8 |
4.751 | -20.3 |
4.927 | -39.8 |
4.966 | -48.0 |
BMW M54 IAT (MAF)
Applicable to the MAF sensor from MS45 vehicles (has an integrated IAT sensor).
V | °C |
---|---|
0.195 | 129.8 |
0.274 | 114.8 |
0.450 | 95.3 |
0.567 | 84.8 |
0.743 | 75.0 |
1.232 | 54.8 |
1.564 | 45.0 |
1.975 | 35.3 |
2.952 | 15.0 |
3.891 | -5.3 |
4.243 | -5.3 |
4.517 | -15.0 |
4.517 | -24.8 |
4.712 | -35.3 |
4.771 | -39.8 |
4.966 | -48.0 |
Audi RS4 (B5) IAT (MAF)
Warning: Scale comes from RS4 binary and needs a 2.61kOhm pull-up resistor.
V | °C |
---|---|
0.156 | 140.3 |
0.234 | 120.0 |
0.273 | 110.3 |
0.352 | 99.8 |
0.449 | 90.0 |
0.566 | 80.3 |
0.723 | 69.8 |
0.938 | 60.0 |
1.191 | 50.3 |
1.504 | 39.8 |
2.109 | 24.8 |
2.793 | 9.8 |
3.242 | 0.0 |
3.633 | -9.8 |
3.984 | -20.3 |
4.395 | -39.8 |
BMW B58 TMAP IAT
Applicable to B58 TMAP sensor (BMW part no. 13628637900) used with MS42 or MS43.
V | °C |
---|---|
0.117 | 142.5 |
0.176 | 129.8 |
0.274 | 110.3 |
0.352 | 99.8 |
0.450 | 90.0 |
0.567 | 80.3 |
0.743 | 69.8 |
0.958 | 60.0 |
1.251 | 50.3 |
2.033 | 30.0 |
3.031 | 9.8 |
3.519 | 0.0 |
3.950 | -9.8 |
4.321 | -20.3 |
4.732 | -39.8 |
4.9888 | -48.0 |