Load problems and ignition advance

[Mr Charge]

Hello;
I am tuning a stage 3 for a mazdaspeed 6 with turbo BNR S4.
Now I'm adjusting a map by boost. I have a sensor map of 3 bar.
The problem is that I can not exceed the constant 26psi. If I adjust the boost objective to 27/28 psi and the corresponding wgdc, I only get a peak pressure. Next, the ecu decreases the prfesion to 25 / 26psi. As the boost targets are higher, the pressure rises again and the ecu corrects again, resulting in a saw-shaped boost line.
I do not know what should limit the boost / load. All the pressure and load tables are superior to 26psi, but the ecu does not allow to execute more maintained pressure.

[Mr Charge]

This is the boost line in wot.

IMG-20190526-WA0063.jpg

If I set the boost target to 25/26 psi, the boost line is flat and stable.
What's going on?

[Mr Charge]

The other problem is that the ecu does not obey the ignition advance correction table "COOLANT TEMP / BAT"
When the bat increases, the ecu can subtract half a degree or one degree. Sometimes nothing remains. I do not get it.

IMG_20190527_235732 (1).jpg

[Fstrnyou]

There is a WGDC boost target correction table to tell the ECU how to adjust WGDC to achieve target. If set too agressive, you will have a sawtooth boost line.

[Mr Charge]

Thanks for the reply.
The wgdc correction table is not aggressive.
The previous image is the boost line with a target at 27'5psi.
This is the boost line with a target of 26psi. The whole map is identical. The line is almost perfect.
If I try to overcome that boost, the abrupt corrections begin.
I'm talking about boost but maybe the limit is in the load. The records indicate the limit around 2.5 load.

IMG_20190528_230654.jpg

[Vansquish]

AHA! You may have run into the infamous load cap in the ECU. What are you using to tune your car?

Check out these threads:
AFR targets at loads higher than 2.50 ATR/ATP fix

Load Glitch

[Mr Charge]

Originally Posted by Vansquish AHA! You may have run into the infamous load cap in the ECU. What are you using to tune your car? Check out these threads: AFR targets at loads higher than 2.50 ATR/ATP fix Load Glitch

COBB ATR

[Jeff23spl]

I got an issue a long time ago with my first attempt to self tune my BT setup, (it may be similar or not)......The ecu was constantly dialing back wg duty at higher rpm...a lot below my targets. . i was able to boost correctly below but i wasn't able to make any kind of BT boost at high rpm.....

Someone just suggested to me to change 2 parameters that wasn't easily looking any close to be related but it solved my issue.
Load target comp high rpm (Beta) to 0
Load target comp injector base offset (beta) to 20.00

Back then, i was not believing it would work and i gave a try without dialing back the previous changes i made to boost target, wg duty and other boost tables.......When i did test the wot pull, it overboosted way too much, ran lean above my fueling capacity with knock and broke a plug and a piston ringland for just few seconds.....just be carefull....I learned it the hard way.

[Mr Charge]

Originally Posted by Jeff23spl I got an issue a long time ago with my first attempt to self tune my BT setup, (it may be similar or not)......The ecu was constantly dialing back wg duty at higher rpm...a lot below my targets. . i was able to boost correctly below but i wasn't able to make any kind of BT boost at high rpm..... Someone just suggested to me to change 2 parameters that wasn't easily looking any close to be related but it solved my issue. Load target comp high rpm (Beta) to 0 Load target comp injector base offset (beta) to 20.00 Back then, i was not believing it would work and i gave a try without dialing back the previous changes i made to boost target, wg duty and other boost tables.......When i did test the wot pull, it overboosted way too much, ran lean above my fueling capacity with knock and broke a plug and a piston ringland for just few seconds.....just be carefull....I learned it the hard way.

Hello
I have put the values that you have told me and it has not worked.
Thank you very much for the contribution.

IMG_20190603_230322.jpg

[Vansquish]

Originally Posted by Mr Charge Hello I have put the values that you have told me and it has not worked. Thank you very much for the contribution. Attachment 237705

Were the conditions in the datalog above approximately the same as the one you posted earlier (in the link below)? If so, then you may have stumbled into something interesting.
It looks like the waveform of the compensation has changed, so the adjustments you made did have an effect, it just didn't completely iron out the fluctuations.

Attachment 237671

I'm not sure that I'll be able to view your map, but would you mind attaching it to your next post? I'll try and open it to see if there's anything obvious that needs to be changed.

[Mr Charge]

The conditions of registration were not exactly the same, but something improved its operation.
The problems of loading and ignition advance are not the only ones that I have.
And the COBB Accesport platform and the ATR program do not help me.
They have tables that do not correspond to what they indicate and hidden tables, etc., which make reprogramming very difficult in people who do not know these traps.
I have tried to reprogram because I like to learn this, I'm passionate about it. The goal is not to save money. It's learning and enjoying along the way. But I do not want to endanger the engine.
I'll trust Freektune to adjust a map. I have read that they are good professionals.
I will put the results here.
Thanks for the help