I was trying to make a tune which will run leaner than stoic at about less than 65% load and lower than 3000 rpm. Along with LAMFA ,KFLBTS,KFFDLBTS( ZEROED out as required) also modified map LAMLGMTM (lambda limit lean) . But from the diagram on page 729 of 1327 of english funktionsrahmen module it looks like me7.x is coded not to exceed lambda 1. Looks like a job for reverse engineers. Whatever I do the car wont run leaner than stoic. Is there any way around or do i have to modify some other maps?.
Thanks

It is not really practical without  custom code. Lambda will follow the richest input so they all would have to be lean. Also, there are hardcoded default values of Lambda 1, so all of the condition bits would have to be set. Also the lean limit would obviously have to be raised

Possible maybe, practical no.

What is the easiest way to disable closed loop?

there is a 2d map that maps o2 voltage to lambda which is then used my ME. Needlessly to say shifting axis will give you what you want. Just keep in mind that these narrowband o2s are quickly outside of measurable range once pushed out more than 0.1 lambda or even less.

Don't ask about the map name, I don't know. I saw it though in RS4 winols definition file when I was looking for other stuff.

LALIUS - Lambdalinearisierung, LSU-Sonde vor Katalysator (22x1)

well, you could shift this axis.. but you would have to tune lots of maps to get everything working as intended again..
ie enrich everywhere.. so later when later you request afr 14.7, you really get ie afr 15.5.

its a good map to have tho, i added it a few days back to my own definitions file.
i was looking into using e85 for a tune, and you can save some fuel if you run this pretty lean and add timing.

Thanks LALIUS is a nice map to have  . My guess is that modifying it will lower the fuel trims which in turn will lean the AFR. But would be nice to remove the restriction  in the code itself, will have a look at it but with my current skills it is going to take time. But why is bosch so adamant on lambda, is it to protect the catcon or does it have some other repercussions.   I remember reading an article which said higher EGT is not the problem with leaner AFR as further it gets from stoic the EGT trails off quickly, But the excess oxygen with high temperature of combustion tend to oxydize or burn the aluminium Pistons, Dont know about forged pistons thou.

Lambda < 1 = enrichment

How do you get Lamdba > 1 by disabling closed loop?

Target AFR will still be <= 1.