NefMoto

Hello Again,

I have just make some trys to get more boost in the car of my Girlfiernd and have some Problems.
The Car:

2001 Mk 4 Gti Aum/Auq
K04001
S3 Injectors
3inch Exhaus from Turbo
Smic Upgrade Intercooler

My Sofware runs good but only the boost doesnt wants to stay you feel some Pumping it goes up and down you even can hear it. but only under 4000rpm  above its getting better.

Yesterday i tried to mod KFLDHBN but it doesnt fix the Problem.

I attached a log in 3rd Gear and the .Bin and .XDF

Software is modded in Injectors, Sec Pump, 2nd Lambda and Boost maps. Even some less Ignition.

May you can help me and have a solution?

Greetings from rainy Germany

Log the PID vars. has nothing to do with HBN

Thanks for your Answer nyet.

What variables do you mean exactly?
Boost Pid D Result
Boost Pid Max
Boost Pid Min
Boost Pid I Result
Boost Pid P Result?

Sorry but what means HBN?

And may is anywhere a guide for using the CSV in the EcuXPLot?
Found the FAQ but i didnt be able to use this CSV in ECuXplot , when i load it in to it i cant choose the different Variables.

Thank you very much.

Thaught about the HBN and realised you mean the HBN of KFLDHBN  :D Sorry for my stupidness.
Will log the Pids i wrote in a few Hours.

Hopefully with all Data you need.. .

Greetings

Your IMAX is doing some very strange things, which is causing massive integrator windup and boost overshoot.

I'm not having any issues loading any of your CSVs in ECUxPlot, they look fine

Do you have a Idea why? When i run Stock Boost or a bit more it seems like there is no Problem even above 4000 rpm.
Got a Pierburg Opel( GM) OPC N75 may there is a Problem?  ???

Thinking about the Problem.
Wehen i understand it right its like a ping pong, the regulation is oversteering.
In the case its not the Software i would do/check following things:
-Check the Wastegate ( movement and pressure)
-Change the hoses of the n75 to the Wastegate and pressure to Valve because diameter is really big (may to big, thinner hose may soften the regulation a little bit)
-May Change back to original VW N75 instead Pierburg OPC

Or do you mean it has to be 100% a Software Problem?


Greetings


 

Yes. Look at your ldimx_w. It is way too high, and you are seeing significant I windup. You're over thinking things.

You can make your PID less sensitive to integrator windup, but that is a PhD topic probably out of scope here :)

prj doesn't like it, but I get around it by just severely limiting imax and making it a feed forward parameter. You can also hack around it by dorking with the wg linearity map, or using prj's total feed forward method from start to finish.

So i have to modify KFLDIMX as the simplest solution?
How would you modify it? How do i limit it?

X is differrence between Acutal Boost and desired?
Y is RPM

Thanks and Greetings

It should be more or less what you want your WGDC to be at any giving operating point *before* KFLDRL correction.


Consult the FR. plsolr is most definitely not lde.

Okay thank you. Will try to understand the Text in the FR.
Even its in German i find it really difficult to understand.

But i will give my best.

Greetings from Germany

Hey , still doesnt fix the problem tried many changes but seems they haven´t the effect i want.
Is there a possibility to set the WG DC Fix ?

So i can check the Turbo working right and see its capabilities.

Your WG isnt the problem, boost is reacting propperly according to N75 DC. You problem is as Nyet said huge windup.
After ive been trying to alter the stock PID controll to a non-oem turbo many times and they've all been shit ive just gone the feed forward route and it now works perfectly. The by far easiest way to get PID to work propperly is to use the feed forward mathod that Nyet mentioned, see link: http://nefariousmotorsports.com/forum/index.php?topic=12352.0title=

There is a tool made for this that generates DRL data for you, the tool is in the post just a few pages further back.

Hope this helps :)

Hey Norwegian 1.8t thanks for your Reply.
Tried the linear tables of the post and i have still a wind up.
So it connected the turbo directly to pressure and i only got 300-350 bar boost.
I think thats might to less. What i read it should be about 0.48 on a k04 001.
I will check that and may change the Wg Can.

Did you use the tool to generate the KFLDRL map?
You'll need to have datalogs with fixed DC from 0-95%.

Thanks again. No i just tryed the Linear table yet.
Downloaded the Tool, will give it a try.
How do i get a fixed DC?
In the post sb wrote i need kfldrapp and cwdrapp but i seems my xdf doesnt have these?

Greetings

You need to set DAPP to 8 and DRAPP to 0-95% depending on what log youre doing. The tool needs some varaibles so you need to make sure you log atleast those.
If you dont have DAPP and DRAPP in you XDF you'll have to find them somehow or get a new defenition. But again, you should really just read the Wiki, all that im telling you is stated there

Than will look for a different Definition.
Do you mean the S4 Wiki or the Funktionsrahmen?
Or is there a third Document i should have?

Didnt read it there, may i over read it.
Thank you.

Greetings.

Little Update. Found the right table.
Tested a fixed DC today and checked the Turbo.

It has been sold to me as K04 001 but it might be a China K03s it has only 39mm intake.
At 80% WGDC at 6500 rpm just 164g/s

So it cant handle the Power i want, will buy upgraded K04 001 than i will try to make a KFLDRL map with the tool.

Thanks for helping @ all.

Will update when i got a new Turbo and may upload my XDF with the updated tables when it all works right.

 

Dont waste time. Try to understand the process of doing the logs and linearization... flat dimx and ldrl from the tool.

post the logs you did from 0% to 80% please

New hardware will not compensate your little understanding for software.

Exactly this.

However, I already sense that this is how this person works.

Sorry may you miss understood me .
You are right that a bigger Turbo wont solve the Problem with the right calibration but why should i spent
time for making logs with a Turbo that can´t Deliver the Airmass i want? Or iam wrong? Thinking about nearly 200g/s.
I just tested 70% and 80% yet.
I will change the Turbo and start log the different DCs.
Than i will post them.

Thanks and Greetings

please provide a log with 0% and the one with 80%.

Maybe your turbo is okay but your smic and intake is shit. if you are on the hunt for airmass, its important to have a top notch environment.
negative pressure in the turbo inlet and so on...

Will do the logs the next days and post them.

The Turbo itself seems okay but seems to be just a stock k03.
The guy who sold the turbo to me told me its a upgraded k04001 and the guy who drove it got 250ps.
Bought it in a package with Manifold and Silicone inlet.

Intake is Stock Airbox with KN Airfilter Mat with the Silicone Hose.
Intercooler is an Smic from HG-Motorsport.

Want to change to a real upgraded k04 001 with bigger inlet and bigger Silicone Hose and will change the Smic to Fmic (same as Seat Motorsport)

Performance Goal should be about 250hp but not max out the Turbo.

Greetings