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BMRDude BMRDude is offline
Junior Member
Posts: 78
Join Date: Apr 2014
Car: 2012 550ix
Default 09-02-2021, 08:55 PM

You’ve got a problem with your boost on bank 1. It’s very low compared to bank 2.
Bank 2 is showing boost numbers upwards of 16. This is roughly correct for Map 2 although not great, but Bank 1 is way low.

I typically run Map 2 and both Banks pull 18 psi. Going to Map 6 can manage 20+ psi but requires 100+ octane.

Also note that I can not run Map 2 on pump gas (94) unless I add an octane booster.
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