NefMoto

Hello everyone,

I have a big problem with finding KRKTE in a S4 file 8D0907551C and 8D0907551D.

I will build in 630ccm Siemens Deka injektors, but I can`t without finding KRKTE.
The .xdf`s I have, has a wrong description for this value.
By comparing the 551M with my 551D, I will have no success.  

I have also read all the topics about KRTKE, but I can`t find it.

Can anybody help me to find it.

Thanks in advance

Kind regards

Pete

I think AndiS4 has the same problem!

http://nefariousmotorsports.com/forum/index.php?topic=2055.0title=

It`s a riddle ;D

Ok,

the riddle is solved.

The S4 8D0907551C and 8D0907551D ECU has both only a 8bit value for KRKTE.
The factor of this 8bit value is 0.001776 for both ECU`s.

It`s at address hex 18D61 for the 8D0907551C ECU,
and at hex 18DA8 for the 8D0907551D ECU.

I`ve tested it today by a friends S4 551D.

Good luck...

(http://www7.pic-upload.de/11.06.12/vtxfjitnvnnb.jpg) (http://www.pic-upload.de/view-14620492/S4_8D0907551C.jpg.html)

Superb

You made my day.

Great job with this info.

Thanks a lot.
Now I can build in my new injektors. :)

regards from belgium

I'm confused... why not just use a M box?

Why change a running system and buy a other ECU?

I belive the original ECU is a good choice and is much cheaper.

Nyet meant to flash your 551D with 551M software, then most the hard work is done;)

That was an option for the 1MB 551D, but not for the 551C with the small 512Kb flash.

Yes sir, in his original post he specified he had a 551D.

I suggest using the M-box files on the D boxes, because that is what I do as well without any problems.
Of course you will have to modify some stuff in the M box code to run fine with the EU model, but other than that, it is flawless.
There is even an M box file uploaded on the forum converted to a Bosch MAF, so it is basically a plug and play thing.

Yes you`re right, I wrote I have a 551D ECU.
But I think RS4boost only wants to help, because I wrote I have a problem with finding KRKTE in a 551C and 551D file.

Yesterday a friend starts his projekt with an older S4 with a 551C ECU.
So it is also good to know where the KRKTE value is stored in this file.

regards

Pete

Your right, I believe Rs4boost was only helping. My apologies, I didn't want my remark to come as arrogant. I was in a rush this morning, :)

Great job, RS4Boost...

Thanks a lot for your help.

I also dont want to directly change to an m-box... (I dont say i wouldnt later...)

But perhaps i can learn a lot by searching through the dbox.

Just one point is the possibility to find out the differences between the load and timing of the m-box and d-box for example.
The D box develops about 15 extra hp to the m-box. So the differences should be a good start in learning how to tune :).
I am sure, bosch and vag did know very well what they did..

Regards,
Andreas

thanks :)

Not really ;/

Honestly, you aren't going to glean much from comparing the files. It would be more useful to compare LOGS from each box, if anything can be gleaned from it (which is doubtful)

Just making power is well understood. Figuring out WHAT is making more power isn't really that relevant. Boost. Fuel. Timing. That is all there is.


their goals are different than your goals.

Everything you need to know is already documented in this forum and the various wiki's

Start there. I doubt you'll find anything in the D-box that isn't already documented.

hmm, Im sure that the m and dbox differ  a lot, also with power output. the m-box s4 should have about 250hp, shouldnt it?
The D-box has 265 hp.

Did you look at the bin?
The point is, that max HP is at about 5800 rpm.
The specified load at this point is at the d-box = 135 and at the m box only 124... If this would be the only difference the theoretically max power of the m box would be about 91,XXX% of tghe mbox at 5800 upm.  (Torque area in lower rpms is 164 (dbox) vs 146,XX(mbox) Thats 88,XX percent of the dbox: Dbox= 400Nm =tq= 295 lb/ft i dont know how much the mbox has. perhaps 275 lb/ft?)
This is theoretically because i did not take the possible differences of Ignition advance and fueling into it.

But this is the point.

Optimal Ignition doesnt differ. The KFZW`s differ for about 0,75 degrees in that rpm area. This may give the m box only 91,XX percent hp of the d-box, which are theoretically good for 242hp to the "should be" 250hp...

There are my 15 HP extra on the D-box.

All this is within thinking about the fueling should be similar, because too also aim to Lambda 1.0. Except BTS Or knockrecognition.

This works in Europe, because the mapping is made for 98 ROZ (research octan) which is  93 AON in the US. With less Octan the knocking recognition will pull timing back = less power... Maybe then the d-box will perform with 91 aoz like the m-box...

But yes, youre right there are no logs in from me now, but this is the theory. And what in abstrackt was written down by Audi :D.

If i am wrong somewhere please tell me.

Regards
 

What is making power has not been a question to me. But I want to learn about the other general conditions.

Its a good point to know the differences between two boxes and the log them... Thats the same way we all are doing or will be doing it with stock and tuned boxes...

From these different logs we are learning.

This accounts for the vast majority of the difference


Optimal ignition map doesn't do what you think it does. It CERTAINLY won't change timing request in the way you think it will, since ME7 is knock regulated.


This accounts for the rest of the HP/TQ difference.

sounds if my thoughts were right so far?!

and with kfzwop, i thought that it would be as you said. I think they are only some kind of target... 

How does the knocking timing retard work?
degree per degree? until it reaches latest possible ignition angle map?

KFZWOP is not a target. It is only a map for torque calculations.
Timing is retarded until there is no more knock in the cylinder, then phased back until knock is heard again. This way the engine is kept on the knock limit.

Ah, great.

Now i understand kfzwop. Didnt think of them only to be values for inner calculation, but clearly there had to be for a load based ecu work..
Thought ignition would be advanced to this area, if no knock has been recognized, before.

Now it makes sence

I like this forum :)