Bosch maf HFM5 sensor 0 280 002 421, 0 281 002 421

[midian]

Hi all, but generally Matt.
there are bosch hot film sensors (same as gtr or z32 type), which capable to measure up to 1200m3/h.
They re rare counterfate, and not so expensive as new oem z32.
but the problem in correct voltage.
If I don't mistaken, in early (0.9.xxx) revisions of ECU it was possible to make custom VQ MAF map.
in current can't find, or, at least understood volume numbers. I'm attaching diagrams from open sourses for Z32 maf and bosch (0 280 002 421).

[Matt]

You can use Operations > VQ Map Transfer Generator to create a curve if you have the polynomials

Otherwise direct editing the 64 points in the VQ map

You should be able to extrapolate a full 64 points form those voltages listed in the table for the part number you have there

[midian]

Understood.
Well,64 points.... Those points I have + ms Excel :p

[midian]

I think minimal coerrection to be done (see image)

[Matt]

Try and extrapolate that out to 64 points. Then it can be assigned into the VQ map grid directly