NefMoto

Technical => Diagnostics => Topic started by: hipeka on June 12, 2014, 01:00:04 PM



Title: Help with unsteady boost
Post by: hipeka on June 12, 2014, 01:00:04 PM
Hi,

I have problems to get steady boost curve. After new version its usually quite steady but after a while its starts to overboost and oscillate after peak boost.
I think its something to do with I-value regulation at boost PID.

Can someone who understand this PID thing take a look at this log file and say what values should i adjust?
Is it just put lower value to LDEIAP, stock value is -30hPa if my map pack is correct.

Car is Audi A4 B5 1.8t Quattro AWT (Euro -version with wideband, 4B0906018CG). Equipped with K03-073 from BEX, BEX exhaus manifold and EV14 550CC injectors.

Here are .csv file WOT run at 3rd gear and my current tuned file.


Title: Re: Help with unsteady boost
Post by: nyet on June 12, 2014, 03:16:17 PM
Are your I limit trims non-zero?


Title: Re: Help with unsteady boost
Post by: hipeka on June 12, 2014, 09:36:23 PM
Are your I limit trims non-zero?

 ldimxa_0      ldimxa_1      ldimxa_2      ldimxa_3      ldimxa_4 

6.35            4.1            3.7            3.95             0


Title: Re: Help with unsteady boost
Post by: hipeka on June 14, 2014, 01:39:12 AM
I change LDEIAP -30hPa to -200hPa and now I-value trims stay at zero value. It helps a little but still overshooting. I try to get new logs soon.

I think TLDIAPN is on 19ACA on my .bin but RPM scaling looks a bit weird to this application (10084).
I try to compare mine to 8N0906018CB (225TT) map pack.
Is there any other fully defined map pack which would be closer to 4B0906018CG?

How should i adjust TLDIAPN to get I-adaption work correct?


Title: Re: Help with unsteady boost
Post by: _nameless on June 14, 2014, 03:59:35 AM
I change LDEIAP -30hPa to -200hPa and now I-value trims stay at zero value. It helps a little but still overshooting. I try to get new logs soon.

I think TLDIAPN is on 19ACA on my .bin but RPM scaling looks a bit weird to this application (10084).
I try to compare mine to 8N0906018CB (225TT) map pack.
Is there any other fully defined map pack which would be closer to 4B0906018CG?

How should i adjust TLDIAPN to get I-adaption work correct?
look at awm def files or mk4


Title: Re: Help with unsteady boost
Post by: hipeka on June 15, 2014, 01:46:33 PM
look at awm def files or mk4

I dont have good def file for CH file.


Title: Re: Help with unsteady boost
Post by: hipeka on June 30, 2014, 07:35:27 AM
I-limit trims still creeping up even with increased LDEIAP and zeroed TLDIAPN.

That cause overboost when actual meets requested and also boost oscillation.