Timing corrections are coming from the readings at your knock sensors. I wouldn't confuse this with a scaled MAF.
I'm not sure I know of a good way to scale KFZW. Maybe someone else can offer insight into this. In my case, I borrowed the KFZW from a TT225 and scaled it back about 5-10% because I believe the TT uses a different crank.
I do not get the reference that my friend, because TT225 has a me7x ecu.
It's pretty simple, you are running too much boost and timing for your setup.
If you were tuning a standalone without amazing knock control like Motronic has, you would have melted your engine by now.
If you continue like this you will probably damage the exhaust valves and possibly the turbocharger due to huge EGT's.
Think a bit about this.
Tuning an internal combustion engine is not like playing need for speed. There are physical processes behind things, and it is a very good idea to understand them, before making changes to the engine management!
Yes,right.. i'm reading bosch engine management documents etc..
i'll try reduce a bit ignition @highloads.
An AFR of 11.5 seems to be rich to me, so this point of enrichment against knock isnt possible anymore imo.
All in all I agree with the others. Reducing boost is the main thing.
A small improvement:
Perhaps you can switch to better fuel with higher ron roz aon (depends where you come from.) And go down with the "Heat-Value" of the spark plug (sorry for my bad english
).
If you drive e.g. a NGK XXX 6 XXX, try a set of XXX 8 XXX. At NGK, the higher the value, the cooler the ignition. This reduces knock. Nippondenso goes the same way...
Attention:
Bosch spark plug values go the other way. The higher the value, the higher ign the temp.
i had a 12s and i don't have a any problem. but fuel quality big factor for good timing. therefore I went back to 11.5s. i'm looking all situations..
I have a NGK 7x spark plugs. i think 8 more extreme for my setup.
And rescale the values I assume?
Is there other axises which should be generally scaled on ME7.5?
I´ve already scaled the KFZWOP(/2) axis and values to match the rescaled KFMIOP (for raised KFMIRL).
KFLBTS should be fine with the original load axis as it is rich enough @ 150%?
That will accomplish nothing. On contrary, if you only scale the axis you will advance timing all over the place.
The existing data needs to be consolidated, more range added and the top end needs to be filled in correctly.
But you are assuming this is somehow his problem, when it's not. He is on M3.8, not ME7.
I don't know why you guys are talking about KFZW/OP, KFLBTS, KFMIOP and what not here. There is no torque model in M3.8.
Yes we don't have a any information about motronic 3 torque model and management..Nobody does not share information.longer an old ecu.. very interesting...
I think, talking about it.
i did rescale KFZW map X axsis. please find in attachment. just change, i changed map offset & factor value. old value 0.050000 new value is 0.060000.. correct or wrong.. it just example.
now it's going to 12ms load. But now advance timing all over the place. it can be dangerous. we need good tuned KFZW map or engine torque model... I have not seen a axis scaled KFZW map...
The summary,
CF's not good and not bad. but it maybe better.
physical factors can reduce it .. low iat,high octane,meth injection etc.,colder sparks,coilpack upgrades..We all know it.
it can lead to incorrect tuned maps ? load request (Kennfeld LDR-Sollwert,Linearisierung der Heißfilmspannung, etc) or fueling.. ?
i cannot see fuel trims on my me3x.. therefore I can not find the reference and can not be sure.
I think the topic would be helpful for everyone.
Thank you for all the comments.
Regards,