Well sort of.
Let me to describe the scenario i faced and based on what i talk about:
Conservative ignition request on wot for a car which works at 191.25% load from 3500 till redline. Lets say 18 degrees KFZW and 19.5 KFZW2 (12 tappering to 18 and 13.5 tappering to 19.5 after 4500rpm).
On 1st, 2nd and 3rd gear car dont pulls back ignition. On 4th and more on 5th gear ignition retards is reaching 4-6 degrees on each cylinder after 5000rpm. IAT is about +12oC from ext temperature and those results are similar in many continuous logs.
So i am wondering how to overcome this issue?
We can request a bit aggressive ignition on lower gears and pull back ignition on higher gears?
Let me start by saying that what you want to do is a very bad idea, and this is because you will melt the engine doing what you are doing.
The reasons you are seeing more ignition retard are as follows:
1. The cylinder charge is probably higher due to higher boost in higher gears.
2. The EGT's go up, making the combustion chamber hotter and more prone to detonation.
Now, what you are doing by retarding timing in higher gears is going to spike the EGT's even more.
You need to control your EGT's properly and enrich the mixture.
As phila_dot said, the reason this is not done is because this is inventing a solution to a problem which does not exist.
If you are capping out the load axis in the map, then underscale your load up top, and you can specify the ignition angle for every load as needed.
I also don't see how reducing advance is EVER going to make anything better under load.
Reduced timing - lower efficiency, more waste heat, higher EGT's, less torque, less power and so on.
This has nothing to do with Motronic per se, it seems that you have a few core principles of the internal combustion engine wrong.
