BMW M5 Maf being the same as a SQ Maf?

[prj]

Thuppu, I'll PM you the P/N a bit later...

[quattrojan]

Any new news? My car had another Maf for breakfast today

[prj]

Yes, I can map your car with a RS4 MAF, no problem.
Got a few cars running on it now and they run perfectly.

You will need to fly me over though... if any interest - contact via PM.

[JP]

Run 500+hp for over 35,000miles on a MAF that's done a total of 205,000miles now on my S6. Haven't ever had any problems because I relocated to between the intercooler and throttle body just before the idle valve.

This way the airflow is more stable through the MAF and doesn't suffer from the shockwaves caused from the recirculates valve and surge on the turbo which tears the wires.

Not ideal as you have to live map your own parameters above 4750rpm where the MAF tops out at 5v but no worse as someone mapping aftermarket management.

[prj]

It is a lot worse than aftermarket management, because your ECU is running totally blind.
You also transition through a totally rich area which then goes lean, since the ECU always injects the same amount of fuel, as it does not know how much air is entering the engine.
It does not use the MAP sensor to determine fuelling, only the MAF.

It's called "mapping to last cell", it has been done for decades, and it's been wrong for decades.

[JP]

Fair enuf. Learn something new every day. Good job I'm running it then