Bosch MAF sensor 20-1080kg/h (0 280 217 801) 95,6mm

[macadam]

inner diameter 95,6mm

MAF V
3,82 0,2765
9,174 0,4232
13,761 0,5445
19,8777 0,683
25,23 0,7877
32,11 0,8966
40,5199 1,0307
61,9266 1,2402
74,159 1,3533
90,9786 1,479
103,9755 1,5712
126,1468 1,7137
156,723 1,8939
195,7187 2,095
233,945 2,271
295,8716 2,5307
361,621 2,7695
422,783 2,9707
477,8287 3,1341
530,0714 3,2775
544,343 3,3163
594,0367 3,4399
641,437 3,5489
715,5963 3,7043
767,5841 3,8081
822,63 3,9219
907,2375 4,0948
994,9032 4,2734
1082,57 4,4575

Used in Bent Continental V8 1994-1995, 389hp/286kW stock

1080kg/h equals to the following mg/stroke (on a 4cyl engine!), which should resemble ~390-400hp.
4000rpm = 2250 mg/stroke (690Nm/390hp)
5000rpm = 1800 mg/stroke (550Nm/390hp)
6000rpm = 1500 mg/stroke (460Nm/390hp)
7000rpm = 1285 mg/stroke (395Nm/390hp)
8000rpm = 1125 mg/stroke (346Nm/390hp)

[euroe36m3]

Just wondering how these were calculated. I am trying to find the info for my MAF sensor. It is also a 95.6mm but from a e36 m3. Bosch number 0 280 217 806. I think mine is broken as it reads from about 0.35V to 5V, but 5V comes in at about 6800-7000 rpm while the engine goes till 7600rpm. Bosch or BMW are not able (willing) to give me those numbers.

Lukas

[macadam]

Just wondering how these were calculated. I am trying to find the info for my MAF sensor. It is also a 95.6mm but from a e36 m3. Bosch number 0 280 217 806. I think mine is broken as it reads from about 0.35V to 5V, but 5V comes in at about 6800-7000 rpm while the engine goes till 7600rpm. Bosch or BMW are not able (willing) to give me those numbers.

Lukas

Some time ago I did find some technical datasheets with some information about air vs. voltage. I put this into excelsheets and interpolated values for the voltages that Civinco-systems use for sensor definitions.

Often car manufacturers get their own Bosch number for their car though the sensor itself is the same as some other existing maf-sensor. If this is the case for M3 I don't know. I could try dig into TunerPro and some binary from an E36 M3.
It sounds highly unlikely that a MAF-sensor uses the compete voltageragne to 5V.... Unless you've done some major changes to the car to get more air (turbo or compressor.)

I have some excelsheets for calculating theoretical airflow from knowing rpm, injectorsize, injector duration and achieved lambda.... This calculation is somewaht simplified since it assumes that all air and fuel is used in the combustion, no air is leaked thru during valve overlap etc.
But if you could list e.g. 21ms fuel @ xxxx rpm, 0,85 lambda and injector size in cc then I can calculate what amount of air per stroke that would resemble.