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adbaz682 · **Joined:** Fri Sep 19, 2025 6:19 pm **Posts:** 1

hey guys im adrian and I have a e36 m3 1998 sedan that i want to tune to pop and burble and delete some codes that keep popping up, ive already got the cable and ive downloaded romraider and ms41 quickflash all i need are i believe the definition files so i can start tuning it, ive already partialy copied the ecu and saved it as a backup.

eetum52 · **Joined:** Thu Sep 18, 2025 11:06 am **Posts:** 1

Hello everyone!
i'm 19 and from finland, looking to learn about ecu tuning and other things related to this topic.
i have an e36 323ti m52b25 with b28 injectors, cams and headers, running maybe about 210hp.
in the future i think i will stroke it to 2.8L, so i would want to learn about tuning the ecu myself.
i already have some knowledge and the needed flashtools and ecu tuning tools for the ms41, only thing that i dont have is the definition files so i could get into learning about ecu tuning.
will definetly search this forum for good advice and help.

loadedpotaytay · **Joined:** Thu Sep 25, 2025 12:14 am **Posts:** 1

Hello, I have a friend with a e36 328i and have been asked to help verify the tune and get some logs. I'm happy this community exists!

simmons001 · **Joined:** Tue Sep 02, 2025 3:11 pm **Posts:** 2

Hi names Matthew, Have an M52B28 swapped e30, that I have done and now looking to dabble into the tuning side of things.

Thanks

haitekgsm · **Joined:** Thu Sep 25, 2025 11:27 am **Posts:** 1

Hi im Alp,
from germany i have e36 i need help ews and immo solution
Thanks

luuc_124 · **Joined:** Thu Sep 25, 2025 1:06 pm **Posts:** 1

Hello, my name is Luuc I’m 22 years old, I’m new here, I have a white bmw e36 320i sedan with a turbo build onto it.
I would like to change a few things so I can shoot some flames!.
So currently looking for definition files for MS41.0.

Thanks

maxbolin1 · **Joined:** Fri Sep 26, 2025 6:58 pm **Posts:** 1

Hey All!

I somehow lost access to my old RomRaider account so I am here to reintroduce myself. I have been noodling with the e36 platform for a few years. I've currently got a turbo m3 that I am always playing with. I built a speeduino standalone with help from the info posted by Pazi but I am returning back to the MS41.x dme! Would love to get access so I can start playing around with it. The UI looks very clean!

overkillperformance · **Joined:** Sat Sep 27, 2025 2:55 pm **Posts:** 2

hello, im Bobby, i work with ecus for about 7 years now, i want to experiment with the ms41 because im new to it.

overkillperformance · **Joined:** Sat Sep 27, 2025 2:55 pm **Posts:** 2

hi ni need definitions

alex_25 · **Joined:** Sat Sep 27, 2025 12:32 pm **Posts:** 1

hellow i am alex i have bmw e36 328 and i want ms41 ecu definitions to remove EWS

mannysE36 · **Joined:** Sun Sep 28, 2025 5:11 am **Posts:** 1

Hello, my name is Manny i have a widebody '96 328is and I'm currently building an NA m52. id like to learn and try to tune it myself instead of paying someone else to do basic tuning. Thank you

hosta · **Joined:** Thu Sep 04, 2025 11:19 am **Posts:** 12

Hi, tried RomRider to see what can i do for the car - had hesitation in low rpm/ slight throttle application. Before that changed every sensor/fuel pump/maf/lambda/cleaned injectors with new OE/OEM parts (everyone knows that ms41 wants to work almost with VDO stuff only )

also visited a Remap/dyno service with a wideband reading (just to check the car for stock condition and also last time was on the verge of not passing MOT in my country for emissions) , the car showed very lean mixtures below 3500rpm

so decided to try and give it a shot myself (the best remaping services as far as i know are in different part of the country - Bulgaria - and it inconvenient for me to visit them for a dyno tune , car is daily driven for 14 years) , i am not going after dyno results/power just for the silky smooth running m52 that i know from experience is there in the car

so m52b28sv ms41 , manual (97 sleeved block)

mods
- lighter flywheel (m20)
- stock airbox (no baffle) with KN
- 68.5mm TB
- m50b25 intake
- decat exhaust with Xpipe (as close to the runners as possible)

Uploading the last file i edited and also the readings from MS41 Quickflash knock table section (the car is detecting knock on euro 95 fuel)

in the file i have added fuel base table, corrected the rev drop (because of the flywheel), turned off catalytic functions, and corrected the vanos engagement

if anyone has any ideas , or advice if i am on the right track it would be appreciated

my approach is to drive the car for a day or two , read the knock tables and lambda corrections and where i see knock i add 0.01 fuel to those rpm/load cells

https://drive.google.com/file/d/1-P-nF5 ... drive_link ( the edit file that has generated the above results in the screenshot)

adamost · **Joined:** Wed Oct 01, 2025 3:47 am **Posts:** 1

Hello, i would like to mess about with the factory ecu.

bludgod · **Posted:** Wed Oct 01, 2025 10:44 am

hosta wrote:

Hi, tried RomRider to see what can i do for the car - had hesitation in low rpm/ slight throttle application. Before that changed every sensor/fuel pump/maf/lambda/cleaned injectors with new OE/OEM parts (everyone knows that ms41 wants to work almost with VDO stuff only )

also visited a Remap/dyno service with a wideband reading (just to check the car for stock condition and also last time was on the verge of not passing MOT in my country for emissions) , the car showed very lean mixtures below 3500rpm

so decided to try and give it a shot myself (the best remaping services as far as i know are in different part of the country - Bulgaria - and it inconvenient for me to visit them for a dyno tune , car is daily driven for 14 years) , i am not going after dyno results/power just for the silky smooth running m52 that i know from experience is there in the car

so m52b28sv ms41 , manual (97 sleeved block)

mods
- lighter flywheel (m20)
- stock airbox (no baffle) with KN
- 68.5mm TB
- m50b25 intake
- decat exhaust with Xpipe (as close to the runners as possible)

Uploading the last file i edited and also the readings from MS41 Quickflash knock table section (the car is detecting knock on euro 95 fuel)

in the file i have added fuel base table, corrected the rev drop (because of the flywheel), turned off catalytic functions, and corrected the vanos engagement

if anyone has any ideas , or advice if i am on the right track it would be appreciated

my approach is to drive the car for a day or two , read the knock tables and lambda corrections and where i see knock i add 0.01 fuel to those rpm/load cells

https://drive.google.com/file/d/1-P-nF5 ... drive_link ( the edit file that has generated the above results in the screenshot)

now that you've said hello you might be better to start your own thread to document your tuning experience

eben-black · **Joined:** Mon Sep 22, 2025 11:53 pm **Posts:** 1

Hi Guys I am EB, excited to be here. Hopefully there are some active members still. I have a BMW E36 318ti with M52 swap.

RomRaider

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