Full basefile for up to 380 hp on M3.8.3 ECU using a HFM5 MAF.

Hardware:
Injectors: Bosch 0280155968
FPR: 4 bar
MAF:  Bosch 0280218073 (VAG 07D906461)

Supporting mods are obviously required (clutch, fuel pump, turbo, intercooler, exhaust etc).

MAF connection:

HFM5 pin - HFM2 pin
       1 - NC
       2 - 3
       3 - 1
       4 - 5V from TPS or Hall sensor
       5 - 4

Calibrated:

• Rescaled load (to avoid 12.75 limit)
• Rescaled ignition maps
• Rescaled injectors
• Rescaled cold start
• Rescaled lambda map
• Disabled high rpm fuel dump
• Optimized idle
• RPM limiter increased to 6900 RPM
• Load limiters increased
• Turbo linearization (but you will have to calibrate it for yours)
• Acceleration and deceleration enrichment

The file provides a big shortcut - re-calibration of the base load in the ECU creates serious problems with cold start, acceleration enrichment, ignition timing, fueling etc. Using the HFM5 allows to use a MAF that is still available for purchase for a low price.

.xdf file included.