VAG 850mg air mass MAF MSA15 limiter

[bdm]

How to overcome 850mg air mass limit in 028906021GG ECU? Similar ECU 028906021JG shows 1250mg. Both with the same MAF sensor.
When I put 049 200 instead of 049 133 I have not real values. What I have to change yet?

[biliibros]

Try two inch tube maf.

[jovime]

The values you're actually seeing on VCDS are contained in a map inside the ECU, related to MAF sensor voltage. Unless you mod that map, you won't be able to get more than 850mg (when there is really more airmass entering the engine). Can you post the original file?