Hacking the Motronic ECU (Audi RS2)

[porkkis]

I assume you was the one who requested s2dude to remove the info he wrote. That's someting I'd consider opposite to helping.

I've been thinking about programming a hondata type sw for my own joy. Finding a reasonably priced emu is the problem. Xtronics has its problems too...

Let's give some more hints to cid to keep him going. 0x3A, 0x3F, 0x38 and 0x37 are figured out correctly.

[Billman]

Very interesting, please Continue sending infos. Even if CID-we never get to the point to figure the Motronic out it is still veryy interesting.

How does this Hondata works?

[Jamo]

If you start jacking the fuel tables to make up for larger injectors(which is what most tuners are doing)you have to retune every condition that was factory tuned.This is not desirable and we would like to avoid this."

Sweeping statement that probably not wise to post.

[Mihnea]

Sorry, you can ask S2dude and he'll confirm, I never told him to remove his info, nor did I actually see it...

I assume you was the one who requested s2dude to remove the info he wrote. That's someting I'd consider opposite to helping.

I've been thinking about programming a hondata type sw for my own joy. Finding a reasonably priced emu is the problem. Xtronics has its problems too...

Let's give some more hints to cid to keep him going. 0x3A, 0x3F, 0x38 and 0x37 are figured out correctly.

[cid]

Quote:
Originally Posted by cid
If you start jacking the fuel tables to make up for larger injectors(which is what most tuners are doing)you have to retune every condition that was factory tuned.This is not desirable and we would like to avoid this."

Sweeping statement that probably not wise to post.

Jamo,

Please note that this is not mine words, is from someone else. But if you think this is not wise, as many tuners are doing. Well I cant confirm how people work in Europe, but here I have seen peopel turbocharging NA cars, that they basically put some new big injectors on and simply rise the fuel pressure, they go into the fuel map table and just change a bit to make the car smooth. (But I can erase that, or people can just be wise enough and choose they tuners better). Sorry if I misunderstood you regarding this subject.

But basically the main table is just a part of the calculations, to my point of view there are a lot of constants that are used to calculate fuel and ignition, as such engine size, injector size, MAF... some ECUs work with a volumetric effciency table to calculate fuel.

I might be wrong here but I will keep trying until I had enough. Actually I had been looking at this for 6 months, sometimes I work hard for a weekend and then stop. I have my own job, that has nothing to do with hacking ECU my knowledge in hex and assembler is also terrible.

I have run IDA Pro before, but as I said it didnt help me much. I think even an emulator does not help that much, as it will help only to find the tables, but I think I have found many already. The most important thing is like Mihnea said in one post long time ago, "after I figure out the constants and values everything got straight forward". So that is where I want to get, I might give up in the middle who knows, but I had create this thread to see if someone would also get involved. Two heads think better than one.

Billman,

check thi site for more info on Hondata www.hondata.com , and you gonna see it how it works, also there is this one www.tunewithcrome.com, but this is only for Hondas.

Thanks for all the help and answers I am getting as this will help me and others that want to find out more about the Motronic (in my case knowing the RS2 ECU is enough).

[Billman]

I am also interested into the RS2 only.

This Hondata thing is very nice. Would love to have something like this for the RS2. For sure the Market is not so wide like the Hondas, but maybe the Motronic for someone who knows about this Stuff is easier.

@Professional Tuners

See the "Modata" as an opportunity not to earn money though Tuning only but you can also give Sessions-Lectures on how to fine-tune it etc.

[s2dude]

Sorry, you can ask S2dude and he'll confirm, I never told him to remove his info, nor did I actually see it...

Absolutely true.

[porkkis]

Ok my bad, sorry.

[Jensk]

According to a certain yahoo group, there is just a resistor that seperates the RS2 (551C?)ECU from the AAN(551A). Except for the bin's ofcourse.
Wouldn't that indicate that the software should be quite similar aswell?

[Billman]

I dont want to disorientate the Discussion here but can the Motronic "hackers" take a look at this Option. Can it be that it will be a good alternative for us?

http://www.s2forum.com/forum/showthread.php?t=18461

[Jensk]

well.. as long as its feeding the right signals to the ecu I guess you could use one. And if it didn't, it would be extremly useless. As far as i can see it works just like a pigyback ecu. But this would be a pigyback MAF (if in that mode).
Also, according to the manual, it uses TunerPro RT. And thats not that hard a program to use.

[Tommy200rs]

some more links for the old motronic tuning story:

http://www.motronic.ws/

http://www.tunerpro.net/videos/V5Tracing.swf.html (looks promising as a link but did not open...)
o lot of updates

http://www.tunerpro.net/

http://tunerpro.net/forum/viewforum.php?f=12

short trace speed demo:

http://www.youtube.com/watch?v=Gqg6Gu5zSd0

not the fanciest emulatorm, but quite reasonable price
NONSTOP real time trace tuning emulator eprom 27c512

http://www.nonstop-chiptuning.com/

http://nonstop-chiptuning.com//index.php?page=shop.product_details&flypage=shop.flypage&product_id=18&category_id=11&manufacturer_id=0&option=com_virtuemart&Itemid=45&vmcchk=1&Itemid=45

http://forum.ecuproject.com/portal.php

[Faheemo]

Anybody have Info they willing to share on lifting the limiter on our cars ? Please !

[S2central.net]

TunerPro = nice but I have been waiting for V5 for well over a year now... sad but true.

[cartune]

Good afternoon. I need help. Can you please tell whether there is in our ECU maps WOT ignition and fuel? I found a card ignition / fuel, but changing the map of the ignition angle change only at medium loads. I also have an emulator with an address trace, it shows that when there is no recourse to WOT maps ignition / fuel 16x16. I know about 6 cards 16x16 ignition, the brain turns to only one - the first, and then only in the mode of partial loads. How the brain takes the values of the angles at WOT?

Sorry for my English.