Sorry, I reread the post. I was thinking he was using stock sensor/housing/tract for that car. My bad. What you say makes sense. I guess try it, see what your fuel trims look like.

I think that older non wideands 1.8t have different plug for the maf sensor. I also think that the "small" 180ps sensors are different in the onoard temperature sensor they have, and to the external case. The element should be the same. Correct me if i am wrong.

KRKTE and TVUB have nothing to do with maf scaling.

I don't think you are right in this because all the cars have iat sensor regardless of maf ut the internal temp sensor that mafs have are for correcting their signal output as a raw value.

nice picture 

it is true that you would need a sensor with much greater "range" on a turbo car since it compresses the air and therefore it will reach much higher temperatures, also it would need to be placed in the intake manifold.. after the air has been compressed, and after intercooler, thats why it has the external IAT.
(if you know the flow and the IAT, your ecu can calculate the density of the air entering the engine)

..but the integrated sensor is great for NA cars since u dont have to use another iat sensor in that setup.. id imagine this same sensor could be used in a blow thru maf turbo setup.. if the maf were to be placed after the ic..