RomRaider

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)

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So after that i took a look at the stock roms for options S962A and S961A

as latest idea i tried the fuel tables + ignition + idle control valve from s962a

my subjective feel is that the car does NOT hesitate ( low, mid, high , no matter the RPM) but as generally gives the impesion of driring a m50b25 engine - very linear, no feel of surging torque form 1500+ rpm - which in my opinion is key feature of m52sv engines

So next will try the S951A in the same way

The only thing I take away from this is that all the fuel in my country is knock inducing (with my stock ECU even with the stock intake) or something like that

So still trying, car drives much better - have not checked it on dyno or with wide band but just my opinion. Sharing the latest file i made. Also the knock reading before editing it

So still trying

Got to these Ign map and fuel map as good enough

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added the partial file also, if someone wants to try it/dyno it/logg etc

i would not advise just flashing it, compare it with yours first - i am not "tuner", do not have AFR Wide band access to correctly do the fueling etc

well for non professional i think that is my limit, car drives smooth and nice, no hiccups or issues , sharing just if someone want a basic drivable setting (probably way, way of top power/optimal fueling) to go to the dyno

hi ! any update ? are u still using this settings ? and why did u made some values ZERO .... like fuel enrichment

yes still using it

the car is decat-ed so no fuel strategies for Catalist are present in my files (i have all of them off/0 ) i suppose you are asking about that