View Full Version : Mercedes OM642 "VGT MAP" what is this?

26th May, 2019, 05:09 PM

in the most time I read only in this forum and Im not a file tuner.

I found a funny tool here (ECM TITANIUM), so i can compare some files from the OM642 engine.
I compare tuned, Stock and some newer Stock files from OM642 and I see that a map called "VGT MAP" is in older versions complete different.

No tuner touched this Map.
What is this Map?

left is the old map, right new

26th May, 2019, 05:50 PM
VGT- verstelbare turbo geometrie

26th May, 2019, 05:53 PM
that map controls the geometry of the turbo ... usually for a stage 1 you don't need to touch it.

26th May, 2019, 06:59 PM
thx for the answers
and what does it mean? stearing of the regulator? but there is another map for turbo pressure

is the pressure map what the car want and the vgt how it can get it?

with 659U/min and 10mm≥/hub...what is 79(%?)
is 79(higher value) for spooling up and 35(lower value) for slowing down the turbo?

30th May, 2019, 10:50 AM
nobody know?

1st June, 2019, 08:47 PM
ok its what i said

I change the value and tested it...in newer software of om642 it has a complete changed map..that works very much better

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