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      08-24-2020, 11:43 AM   #1563
N420i
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Drives: 2016 420i lightly modded
Join Date: Nov 2016
Location: Madrid

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Quote:
Originally Posted by pauli18c View Post
Flashed the MHD OTS stage 1, 91 octane tune on Friday afternoon, topped the tank off with shell 93 and ran it all weekend. So should have had plenty of time to adapt (like 200 miles).

ran a log tonight

https://datazap.me/u/pauli18c/mhd-ot...36-37-38-39-40

I will say that it is on the stock plugs and I have not pulled them to gap them. I have NGK 1 step colder plugs coming tomorrow hopefully and plan to gap them at .022 and get them in ASAP
That log looks VERY similar to what BM3 Stg1 91 looks like in my fully stock M140i. Same timing pull. The pull is similar with Stg1 93, but the car is significantly faster.

I swapped out the stock champions for gapped NGKs and that didn't make the slightest difference.

The only thing that seems to make SOME difference is using Shell gas. Even then I still have significant timing pull, as do many, many people using the OTS maps without ethanol... I've logged friend's B58s and they have the same pull as you and me...

Apparently there's no solution besides using ethanol if you have access to it, or getting a custom tune.
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