Original 1,8t 225hp maf has plastic frame+steel grid, which means crossection is smaller than S6 maf(instaled only steel grid), see attached picture. When rescaling MAF, should i have evalute area of plastic frame, or just measured inner diameters?

Sorry for my english(it's not my native language), maybe not cleary asked. That i wanted to say: BAM maf (left picture) has aditional plastic frame inside maf, which means real cross section area is smaller than identical ID tube cross section area (as you wrote - "Air does not flow through solid plastic"). Im going to instal new maf without plastic frame, so rescaling only by ID works fine and difference by plastic frame will not affect anything?

thanks

Hi all,

Fisrt of all I want to thank everybody involved in the creation of this tool. Waiting for hardware to test the results in the car but looks great.

I am converting from a 1.8t AEB maf (67mm ID measured) to a VR6 ABV maf (78mm ID measured). 35.53% cross section area increase.

The program does it's job correctly, but when comparing the rescale file obtained with the program, to the map in a stock vr6 file, there is a discrepancy in the maximum reading possible:

- Rescaled maf file shows max 912.63kg/h
- Stock oem VR6 files show max reading 988.5kg/h

I assume this has to do something with the reverse flow capabilites of 1.8t maf that VR6 does not have. I also read it may have to do with the offset in VR6 map (0) and the offset in 1.8t map (-200).

Does somebody know or can confirm, just for knowledge, the reason this discrepancy between the rescaled map and OEM map happens?

Thank you so much. Best regards!

Discovery was made 2020.
Here is the twitter post by the guy who discoreved it.