RomRaider

1) i had it available on my MS41.0 when i was running that SW.
2) it is as easy as pasting your maf scaling in the 2048kg/hr MAF map, you can change the maf scaling in your partial (24kb) whenever you like.
3) read your full 256kb with MS41 quickflash or siemens MS41 flashtool, you can open this file in romraider. select 2048kg/hr mode and write back too your ECU.

but just convert to MS41.2.

Thanks for your response.

1) Which ID of MS41.0 you did ran?
2) Clear. I was confused about the following explanation on MS41 wiki: "In this example, we want to multiply the MAF limit by 2 by selecting 2048 kg/hr Mode so we must divide all the 256 cells by 2 to maintain same engine operation as before." If I read it this way, I should divide all my current MAF values (which expands 1023 kg/hr) by 2.
3) Correct. I thought I could only import the 24kb file, but now I see I can also import the 256kb full file. On my MS41.0 ID40 the 2048kg/hr mode looks like not be definied, where I can activate it using a 41.2 stock ROM.

In short, will continue upgrading 41.2. Would be nice of someone can further explain my confusion about question two.

Dividing the values by 2 (or 3 or 4 depending on the case) is to avoid some limitations in regards of the load seen by the ecu.
People reported that above 1300 load ecu makes a sort of fuel cut, on engines with big turbos
To avoid that you trick the ecu thinking less air goes into the engine by dividing the maf table by 2. For your mapping to stay true you also need to rescale all your tables axis which load is in

that is load (mg/str) related, not MAF (Kg/hr) related. i run 2048kg/hr mode, with my maf values being 0,5 of what they actually are.

2 diffferent things. we can run the 2048kg/hr mode to run a higher maf scaling. that has nothing to do with the loadlimit.
and the loadlimit has nothing to do with the MAF scaling. (of course your load is calculated from MAF readings)

if you experience the loadlimit. you have to divide both the maf scaling (if you run 1023mode than that map, if you run 2048mode than that map),
items that are MAF related and load related values by 2.

Stock
Load Limit = 1389 mg/stroke
MAF Limit = 1024 kg/hr

Option # 1 (this thread)
Load Limit = 1389 mg/stroke
MAF Limit = 2048 kg/hr

Option # 2 (divide all MAF and Load by 2, or 4)
Load Limit = 2778, or 5556 mg/stroke
MAF Limit = 2048, or 4096 kg/hr


Option # 2 is ideal but is a lot more work. I'm working on some software code to do it easily for users.

You haven't finished that code by any chance, have you?

Hello, first thank you for all info here you guys are awesome.

I am planing to do 2048 MAF mode on 1429861 ID41 ECU 2.8i
When I load full bin in RR I dont have 2048 mode, but...

I did 2048 mode on M3 file and I see that only one byte is changed



So I compare that to my 2.8i file and look like I only need to change in my 2.8i file
42 to 32 at 0X28621



Will that work? Also do I need to checksum 256 binary after this?

I can confirm that this what I mention post before work. At least at bench I don't have car to test it
But you can see from log that at 2.17 V I have 160 kg/h. In my map is around 80 what is half of this value
Thank you all guys you are awesome

I can confirm I tested this on car and works.
But also there is no reason to do MAF hack, beacuse load limit on MS41 is around 1050 mg/str. And you will most reach first load limit before MAF limit. Unless engine revs 1000-2000 rpm more than stock. But for turbo, MAF hack does not have sense.
If anyone have some IDA project for MS41 I can help find Load limits to divide them

Sorry if it feels im beating a dead horse. i understand the idea of 2048 mode and halfing the maf table to get to regular values.

and then to trick load limit i should divide all tables with load by 2? this is the part i have confusion with. are we talking all tables that use load as an axis? example. the fuel injection base map. uses load as an axis against rpm. i divide all cells value by 2? as well as every other map that has a load axis?

Just to clean up this old information, just change k_lm_max_diag (c_maf_max_diag) to 1389mg to get around this limit.

SW861: 0x141B6 (X*5.447058823529)

This is in the latest version of the definitions

I checked my dme files with latest definition v046.2xml, my dme is originally MS41.0 1429861 cal ID41 and converted to MS41.2 1406464 cal ID12

Under control bits drop menu I have this note With 1406464 partial ***DO NOT FLASH FILE:MS41.2 Version Check and with the original 1429861 partial that warning does not show up so do I need to convert the dme back to 41.0, or just stay with the old style like halving all the maf and load values?

Big thanks for great work with the dme stuff for all of you all these years and I really mean it.

Edit: Same warning comes with v46.1 also, I have modified partial with that several times and that has been working good so no problem I think

Hello everyone,
I hope this is the right place to ask.

I’m currently building a turbo 328i and I’m in the process of preparing a base map. I wanted to switch to the 2048 kg/hr MAF mode, but when I open the full read, I don’t see any values at all.

I’ve had a similar issue before with the logger definition. In that case, simply adding my ECU ID (1432401) to the definition file solved the problem. However, since this change would involve writing data and not just reading it, I’m concerned about the risk of bricking the ECU.

So my questions are:

Is it safe to manually add my ECU ID to the definition file in this case?
If not, what would be the best solution?
Would upgrading to MS41.3 be the safer or recommended approach?

Thanks in advance for any advice or experience you can share.