Modifying Motronic 2.3.2 ECU hardware and software.

[prj]

fork the m232 repo on github, commit it and submit a pull request.

[vwnut8392]

i did a little bit of labeling and fixed some of the non legible labels and traces i could confirm by tracing on an ECU. I labeled all of the pins at the ECU connector, put part numbers with the hardware and labeled what hardware is what to the best of my knowledge. If anyone finds any errors let me know and i'll fix them.

[prj]

I will just leave this here. your welcome everyone!

That's a lot better quality than what I have.

[Acki]

how does acceleration enrichment on motronic 2.3.2 work? Is it TPS based and will enrich for a certain time?

At the V8 I had the impression that one map is used depended on the throttle opening speed, possible that I'm on the wrong path because I didn't catch the right function of the map :-D

[2fast4U]

I will just leave this here. your welcome everyone!

[kobiewel]

Ok but my injection map will still be to rich causing my fuel consumption indicator to under read. Also if i ever have a piggy back failure the car wont run unless i re install the standard injectors. and yes i dont need the boost map. I have the means to flash the eprom

[curamrdan]

I dont know if anywhere is file tuned on similar setup for download. But in your case, i would try to download and flash 551B file, which is stock RS2 (say tuned S2 from factory) without immobiliser. And finetune it by piggyback. The boost chip you can probably leave alone, car doesnt have check engine light, so no stress about it for you.

[kobiewel]

Oh yes i am from South Africa and no one here can help me as they are very rare cars

[kobiewel]

Ok Guys so i feel a bit stupid here among u genius's. i am owner of a aby s2 for 18 years and has done for the first time an upgrade to my baby.Can anyone point me to where i can find a file for my upgrade- Garrett Gt2871r, 630cc siemens deka, tube manifold, down pipe. I have fitted Perfect Power piggy back which is awesome for me to tune myself. i can do anything from boost to fuel to ignition. I feel however that if i had the correct standard motronic map i would not have some simple issues, like my fuel consumption indicator being wrong etc. Can anyone help with a good map at 1.4bar for my setup?

[curamrdan]

Enrichment i probably read somewhere here, that enrichment is not triggered by TPS but by some kind of maf signal progression,ramp rate. I found few tables which have influence on enrichment, but its bit try&error to set them enought well.

And i would like to ask also, did anyone know/found some minimum IGN advance limiter , is it in a block of data where revlimit ect is or its separate table?

[-ice-]

Hello,

how does acceleration enrichment on motronic 2.3.2 work? Is it TPS based and will enrich for a certain time?

Best Regards

[-ice-]

These 6 maps don't have a same shape, so I think each means something different!

And we should reread the post of prj #391. It tells the max of the throttle position.

Daniel

[-ice-]

I correct myself: from 0x2218 (all rs2 B) these are maps.

if we look at the adresstable:
0x2218
0x2240
0x2268
0x2290
...
always 40 byte in between.
from shape 8x5 fits...

but what they do, thats difficult...need to look in the code which axes are used.

Daniel

[curamrdan]

For "offline" tune its crucial to know exact scalling of TPS/RPM axis, same as target pressure. Otherwise it will be loong shooting in the dark.

You can corelate higher DC as higher boost (atleast from roughtly 3000rpm), if we agreed that DC and Targert table using same axes. At values around WOT not corelate to each other in RS2 file.. therefore i posted maps from normal S2.

0x2218 acording my limited search its probably something around knock control, put it simply, these are values not to mess around when we need just to change boost. But of course is better to know something than nothing.

[-ice-]

I think you already know that the target boost map is 3d and dependant on RPM and TPS. Simply by looking at its shape you see where lower throttle position and lower rpm is. For the conversion faktor I simply took the max. boost of rs2 (was it 1,55bar?, I forgot). The range of the throttle I assumed as 0 to 100%, and rpm might be something around 0 to 7000 rpm. And then it maked sense what I see...

for the duty cycle its the same, 16x10. You will see that more boost will require more duty cycle. As we talked about you cannot simply correlate them. It depends on the mechanics of the turbo how it spools up with the wastegate opened a certain amount.

can somebody help with the stuff from 0x2218. I think these are not maps, maximum short 2D lines. But for what? Not a clue for now. Maybe knock control?