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      01-21-2019, 04:37 AM   #1
chris-c
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Drives: F31 340i RWD
Join Date: Feb 2018
Location: Kent

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Question Remapped B58 producing low power

I've become aware of someone who has had their B58 vehicle remapped and they're seeing very low values and we're wondering what is up. I'm not naming names as I do not want to talk bad about anyone.

The sports dials hit a maximum of 300 (which is low) and a rolling road session showed a peak of 355bhp ish and at 5k rpm the cars AFR went from a nice and steady 12(ish) to 16 in a huge spike and just stayed there for the rest of the run.

We confirmed this isn't a "dyno mode" because the car is definitely down on power on the road too.

The odd thing is their max boost pressure only ever hits 11.8/12 which I think is stock boost pressure.

They are going to get the car looked at by the company that remapped it to see if they can offer any input.

Any thoughts?
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