Help with wgdc

[Rufus bmw]

My boost dropping off from target from 4k RPM on. I can see wastegate % is relatively low. Do you guys typically increase wgdc base and adder to close the wasegates more and hold higher psi closer to target or adjust PID !?

Thanks

datazap.me | Den | Log 1590202192

datazap.me

 

[JBacon335]

I'd add 10% to the base and see how it holds. Load never hits target on that log but there's plenty of headroom

 

[Jeffman]

Do you guys typically increase wgdc base and adder to close the wasegates more and hold higher psi closer to target...?

Yes. This is what I do to get ~22-23 psi boost @ 4500 prior to taper (stock inlets) with WOT from stockers. WGDC is 99%...they haven’t blown yet after all these years!

 

[Rufus bmw]

Yes. This is what I do to get ~22-23 psi boost @ 4500 prior to taper (stock inlets) with WOT from stockers. WGDC is 99%...they haven’t blown yet after all these years!

What load target do you run for 23 psi ?

Do you also expend your wgdc y axis . I can see x axis is maf request and it needs to be scaled up which I did. What does the value on y axis represent ? Thanks

 

[Jeffman]

Here's my latest bin - for Flex Fuel. This is completely home-brewed based on tweaks and various adjustments over the years, including the latest throttle adjustments for an AT. Happy tuning!

 

[Rufus bmw]

Here's my latest bin - for Flex Fuel. This is completely home-brewed based on tweaks and various adjustments over the years, including the latest throttle adjustments for an AT. Happy tuning!

Thanks for your help. But what
Xdf are you using I tried to open some maps and they all seem to be scewed.

 

[Jeffman]

Mine is IJEOS.

 

[Rufus bmw]

Mine is IJEOS.

Got it. I noticed your wgdc at 401 is value 58. Which I though was fully closed gates . Your adder for 401 is 35.63. how does adder help if your base value is already indicating fully closed wastegates .

Is x axis in wgdc base maf req or maf req wgdc log value ? I am seeing maf req wgdc as high as 520 in my logs. I am best to scale out the x axis into 500s?
Thanks again .

 

[Jeffman]

Sorry, I don’t recall. I haven’t looked at that part of the tune in quite some time.

 

[JBacon335]

Got it. I noticed your wgdc at 401 is value 58. Which I though was fully closed gates . Your adder for 401 is 35.63. how does adder help if your base value is already indicating fully closed wastegates .

Is x axis in wgdc base maf req or maf req wgdc log value ? I am seeing maf req wgdc as high as 520 in my logs. I am best to scale out the x axis into 500s?
Thanks again .

100 would be completely closed in my understanding

 

[Rufus bmw]

Sorry, I don’t recall. I haven’t looked at that part of the tune in quite some time.

Do you get throttle closures with such high WG duty ?

 

[Jeffman]

Never.