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  1. #1
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    Wo knows what these Tables are for?

    There are some Tables in an N54 bin that there is no mention of whatsoever online. I'd like to know what they do and what units the values are actually in. They are:

    EGT NOx Set Point (Cat Protection Mode)
    Fuel (Min Cat Protection Mode)
    Fuel Floor (Min Cat Protection Mode)
    Load to Torque Limit 1, 2 and 3
    Torque Limit Offset
    Torque Limit Offset A
    Boost Request Offset %
    Threshold (Major Throttle Closure) - All i hear about this one is to change it to 0.960 but not what it does.
    Load Target Limit Factor (ECT)
    Specified Load
    Torque Limiter 3

    Also, is there a way to access any control over the water pump?

    Thanks in advance.

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  3. #3
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    I think I figured out a few. I suspect that min cat protection mode is a "rich" mode for when calculated EGTs get too hot maybe? Fuel (Min Cat Protection Mode) would be a multiplier of the current AFR depending on something (the top axis) and the fuel floor (min cat protection mode) would be the richest that it allows it to go.

    The EGT NOx set point (cat protection mode) is maybe a calculated EGT table (or maybe the factory widebands can also measure EGT) although, assuming it is in degrees celcius, the 950 values seem way too low to trigger a protection mode. I have no idea about the rest.

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    2011 E90 M3 \ Melbourne Rot Metallic

    Click here to enlarge

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    Edited for readability below...Sticky please delete if you see this.

  6. #6
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    Came across this thread while trying to figure out the 'Specified Load' table. Have you made any headway on that table?

    Here are a few that I can attempt to clarify:

    - Fuel Floor (Min Cat Protection Mode) - I *believe* this is the minimum AFR the DME will run in order to protect the catalytic converters. I.e. too much fuel in the exhaust equals holes in cats.

    - Load to Torque Limit 1, 2 and 3 - These appear to set the maximum torque (in N*m) for a load x RPM setpoint. I'm clueless on the implementation of these tables though.


    - Torque Limit Offset - Some sort of torque request nanny.


    - Torque Limit Offset A - Some sort of table that corresponds to the above nanny.


    - Threshold (Major Throttle Closure) - Impacts the throttle correction force of the DME. Greater value = more closure (stock is 0.984, Cobb recommends 0.960, I like 0.970-0.972).


    - Load Target Limit Factor (ECT) - Nanny for your coolant temperatures. AFAIK this will reduce load target based upon coolant temp.

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