PL_MR

Hi,

When I datalog, I can see that my boost is not correcting to reach the target.
I see the boost error but when I look at the WGDC Correction, it's always 0.

I'm using direct boost control with omnimap 4bar and grimmspeed boost controler.
Running 25psi tapering to 21psi at red line.

When I look in the global boost control setting map, I have found this that I'm not sure if it's well set(never touch it before):
- WGDC Correction table: the scaling is not set to OffsetWGDC but Percent255??
- Max total upward wgdc correction vs tps table: the value of wgdc correction are set to 0 everywhere??

Here's my boost error correction table and exemple of log.
My interval of correction is set to 1 for low and high gear.





Why do you think wastegate is not correcting guys?

PL_MR

the graph is a 3rd gear run...

MercenaryX2

You don't have something setup properly. Check your settings to choose between load or PSI based maps. Also, what turbo are you running?

gear head

iTrader: (3)

I had this happen once on an '04, everything was set up properly but the correction would not work no matter what. I just figured it was something in the ECU that went bad and left boost control in open loop. It will be interesting to see if you find a solution.

PL_MR

stock turbo, stock wastegate, grimmspeed boost controller
setting of psi or load is well done, that what I think too at first...

PL_MR

could someone check and compare this map edit of the boost error (mainly the offset wgdc line) if the parameter write are the same and his map

it's for an evo IX TephraMOD-88590715-v7 map.


Else, I will try to play with the value in all the table there's the wgdc correction in it to see if I have a value that is limiting me for the correction..

MercenaryX2

Mind posting your rom so we can take a look? Probably be easier that way.

PL_MR

here's my rom
evo9.bin

TephraMOD-88592715-v7.xml

PL_MR

Problem found!!

It was the Max Total Upward WGDC Correction vs TPS Table that was the problem.
It was all set to 0 everywhere. I start changing it and everything is right.

With the correction done, I was overshooting the boost target each time with a spike before it correct on target. With testing, I have finish to make it work good with putting the WGDC correction interval to 3 instead of 1 and the table like this


From what I understand, I only want the boost to get corrected at full load because before full load, it can offset the wgdc curve and when it get to full boost, I overshoot a spike before another correction come to be on target...

What your total upward... table look likes guy when it's stock?? I don't why mine was all set to 0...

ReaperX

iTrader: (5)

In the Tephra file mine was set to all zero except the 85 & 100, those were set to 10. I currently run all 0's in mine. Reason for that is the tendency to overshoot your boost targets, which is what it is doing for you now with the spike.

PL_MR

With the wgdc correction set up around 3-4, now it's pretty good...(not perfect)
Because with out the correction, I often got my boost curve 25psi dropping for a 100rpm around 22psi getting up to 24 after or sometimes it's alright...

Boosted Tuning

iTrader: (12)

Stock is 10 in the last two boxes on the right.

Some tuners zero it out because this will happen. Your turbo will be spooling and say -2psi before your target boost, the ECU will see boost error at -2psi and add WGDC, causing over boost. So people zero it or greatly reduce it so that it wont add WGDC and make boost spikes.

When you zero it, the correction only corrects downward, making sure you never over boost.